FLUKE-741B 120 - Fluke

741B/743B

Documenting Process Calibrator

Users Manual

PN 644788

June 1997 Rev.1, 3/98

All product names are trademarks of their respective companies.

LIMITED WARRANTY & LIMITATION OF LIABILITY

Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is three years and be-

gins on the date of shipment. Parts, product repairs and services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer

of a Fluke authorized reseller, and does not apply to fuses, disposable batteries or to any product which, in Fluke’s opinion, has been misused, altered, neglected

or damaged by accident or abnormal conditions of operation or handling. Fluke warrants that software will operate substantially in accordance with its functional

specifications for 90 days and that it has been properly recorded on non-defective media. Fluke does not warrant that software will be error free or operate without

interruption.

Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different

warranty on behalf of Fluke. Warranty support is available if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable interna-

tional price. Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts when product purchased in one country is submitted for

repair in another country.

Fluke’s warranty obligation is limited, at Fluke’s option, to refund of the purchase price, free of charge repair, or replacement of a defective product which is re-

turned to a Fluke authorized service center within the warranty period.

To obtain warranty service, contact your nearest Fluke authorized service center or send the product, with a description of the difficulty, postage and insurance

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jurisdiction, such holding will not affect the validity or enforceability of any other provision.

Fluke Corporation Fluke Europe B.V.

P.O. Box 9090 P.O. Box 1186

Everett WA 98206-9090 5602 B.D.

U.S.A Eindhoven, The Netherlands

5/94

i
Table of Contents
Title Page
Introduction....................................................................................................................1
Standard Equipment...................................................................................................... 4
Safety Information......................................................................................................... 7
Getting Started Exercise ............................................................................................... 10
Operating Features ....................................................................................................... 12
Input and Output Jacks............................................................................................. 12
Keys ........................................................................................................................ 14
Display...................................................................................................................... 17
Setting Up the Calibrator............................................................................................... 19
Using the Strap and Bail........................................................................................... 19
Charging the Battery................................................................................................. 20
Battery Life ............................................................................................................... 22
Preserving Battery Life............................................................................................. 23
Using the Optional Battery Eliminator....................................................................... 23
Selecting the Display Language............................................................................... 24
Adjusting the Display Contrast.................................................................................. 24

741B/743B
Users Manual
ii
Displaying the Date and Time................................................................................... 24
Using the Backlight ................................................................................................... 26
Personalizing the Calibrator...................................................................................... 26
Using Measure Mode..................................................................................................... 28
Measurement Ranges............................................................................................... 28
Measuring Electrical Parameters.............................................................................. 28
Testing Continuity..................................................................................................... 30
Measuring Pressure.................................................................................................. 30
Measuring Temperature............................................................................................ 34
Using Thermocouples .......................................................................................... 34
Using Resistance-Temperature Detectors (RTDs)............................................... 37
Measurements in Percent of Scale........................................................................... 41
Linear-Output Transmitters .................................................................................. 41
Square-Law Process Variables............................................................................ 41
Customizing mV Input Units...................................................................................... 42
Damping Your Measurements................................................................................... 43
Using Source Mode ....................................................................................................... 44
Sourcing Electrical Parameters................................................................................. 44
Simulating a 4 to 20 mA Transmitter......................................................................... 46
Supplying Loop Power.............................................................................................. 48
Sourcing Pressure..................................................................................................... 50
Simulating Thermocouples........................................................................................ 53
Simulating RTDs....................................................................................................... 54
Sourcing in Percent of Scale..................................................................................... 57
Linear-Responding Transmitters.......................................................................... 57
Square-Law Process Variables............................................................................ 57
Stepping and Ramping the Output Value.................................................................. 58
Using Manual Step............................................................................................... 58

Contents 
(continued)
iii
Using Auto Step................................................................................................... 59
Ramping the Output ............................................................................................. 60
Simultaneous Measure/Source ..................................................................................... 63
Calibrating a Process Instrument .................................................................................. 66
Generating “As Found” Test Data............................................................................. 66
Adjusting the Transmitter.......................................................................................... 71
“As Left” Test Run .................................................................................................... 72
Test Comments........................................................................................................ 73
Calibrating a Delta-Pressure Flow Instrument.......................................................... 73
Calibrating a Limit Switch......................................................................................... 74
Transmitter Mode.......................................................................................................... 77
Memory Operations....................................................................................................... 79
Saving Results.......................................................................................................... 79
Reviewing Memory................................................................................................... 81
Data Logging (Model 743B Only)............................................................................. 81
Recording Min and Max Measurements................................................................... 84
Running a Preloaded Task (743B only).................................................................... 84
Clearing Memory...................................................................................................... 84
Using the Built-in Calculator.......................................................................................... 85
Saving to and Recalling from the Registers.............................................................. 85
Using the Calculator to Set the Source Value.......................................................... 86
Quick Guide to Applications.......................................................................................... 86
Communicating with a PC (Model 743 Only)................................................................. 96
Maintenance.................................................................................................................. 96
Replacing the Battery Pack...................................................................................... 96
Internal Lithium Backup Battery................................................................................ 97
Cleaning the Calibrator............................................................................................. 97
Calibration Data........................................................................................................ 97

741B/743B
Users Manual
iv
In Case of Difficulty................................................................................................... 97
Service Center Calibration or Repair ........................................................................ 98
Replacement Parts.................................................................................................... 99
Accessories.................................................................................................................... 100
Specifications................................................................................................................. 102
DC Voltage Measurement......................................................................................... 103
AC Voltage Measurement......................................................................................... 104
DC Current Measurement......................................................................................... 105
Resistance Measurement.......................................................................................... 105
Continuity Testing..................................................................................................... 106
Frequency Measurement.......................................................................................... 106
DC Voltage Output.................................................................................................... 107
DC Current Output.................................................................................................... 108
Resistance Sourcing................................................................................................. 109
Frequency Sourcing.................................................................................................. 110
Temperature, Thermocouples................................................................................... 111
Temperature, Resistance Temperature Detectors.................................................... 114
Loop Power Supply................................................................................................... 116
Top and Bottom Limits of Ranges with Auto Range On............................................ 117
General Specifications.............................................................................................. 119
Index ............................................................................................................................. 121

v
List of Tables
Table Title Page
Summary of Source and Measure Functions..................................................................... 2
I nput/Output Jacks and Connectors................................................................................... 12
Key Functions .................................................................................................................... 15
Battery Life......................................................................................................................... 22
Thermocouple Types Accepted.......................................................................................... 35
RTD Types Accepted......................................................................................................... 37
Simultaneous MEASURE/SOURCE Functions with Loop Power Disabled ....................... 64
Simultaneous MEASURE/SOURCE Functions with Loop Power Enabled........................ 65
Replacement Parts.............................................................................................................99

741B/743B

Users Manual

vii
List of Figures
Figure Title Page
Standard Equipment .......................................................................................................... 5
Definition of Symbols .........................................................................................................8
Jumper Connections for Demonstration............................................................................. 11
Measure/Source Example.................................................................................................. 11
I nput/Output Jacks and Connectors................................................................................... 13
Keys................................................................................................................................... 14
Elements of a Typical Display............................................................................................ 18
Using the Bail and Installing the Strap............................................................................... 19
Removing the Battery and Using the Charger.................................................................... 21
Electrical Measurement Connections................................................................................. 29
Gage and Differential Pressure Modules........................................................................... 31
Connections for Measuring Pressure................................................................................. 33
Measuring Temperature with a Thermocouple................................................................... 36
Using a Jumper Correctly................................................................................................... 39
Measuring Temperature with an RTD................................................................................ 40
Electrical Sourcing Connections ........................................................................................ 45
Connections for Simulating a 4 to 20 mA Transmitter........................................................ 47

741B/743B
Users Manual
viii
Connections for Supplying Loop Power.............................................................................. 49
Connections for Sourcing Pressure.................................................................................... 52
Connections for Simulating a Thermocouple...................................................................... 55
Connections for Simulating an RTD ................................................................................... 56
Checking a Relay Output Trip Alarm.................................................................................. 62
Calibrating a Thermocouple Temperature Transmitter....................................................... 68
Limit Switch Terminology.................................................................................................... 74
Calibrating a Chart Recorder.............................................................................................. 87
Measuring Voltage Drop..................................................................................................... 87
Monitoring AC Line Voltage and Frequency....................................................................... 88
Calibrating a Current-to-Pressure (I/P) Transmitter............................................................ 89
Measuring the Output Current of a Transmitter.................................................................. 90
Measuring a Precision Resistor.......................................................................................... 91
Sourcing Resistance........................................................................................................... 91
Checking a Switch.............................................................................................................. 92
Checking a Tachometer...................................................................................................... 92
Calibrating a Pressure-to-Current (P/I) Transmitter............................................................ 93
Calibrating a mV to Current Transmitter............................................................................. 94
Checking a Vortex Sheeding Flowmeter ............................................................................ 95
LCD Operating Environment Specification......................................................................... 120

Documenting Process Calibrator

Introduction

Fluke 741B and 743B Documenting Process

Calibrators (hereafter referred to as the calibrator)

are battery-powered, hand-held instruments that

measure and source electrical and physical

parameters. See Table 1. The calibrator lets you

troubleshoot, calibrate, verify, and document your

work on process instruments. Calibrator

Specifications are near the back of the manual.

A summary of the measuring and sourcing functions

provided by the 741B and 743B calibrators is shown

in Table 1. In addition to these functions, the

calibrator has the following features:

• General features:

An analog display to make it easy to read

measurements when the input is unstable.

A setup option that lets you set the display to

English, French, German, Italian, or Spanish.

A thermocouple (TC) input/output jack and

internal isothermal block with automatic

reference-junction temperature compensation.

Or, you can manually enter an external

temperature reference.

The ability to store results for later review.

741B/743B

Users Manual

Table 1. Summary of Source and Measure Functions

Function Measure Source

v dc V 0V to +/-300V 0V to 15V (10 mA max)

h ac V 0V to 300V rms, 20 Hz to 5 kHz No sourcing

h Frequency 1 Hz to 1 kHz (100 mV to 300V rms)

1 kHz to 30 kHz (0.5V to 30V rms)

30 kHz t o 50 kHz (1V to 30V rms)

0.1V to 10V pk zero-symmetric sine or square

wave, 0 Hz to 50 kHz

q Resistance 0Ω to 11 kΩ 0Ω to 11 kΩ

m dc Current 0 mA to 110 mA 0 to 22 mA (28V max), sourcing or sinking

q Continuity Beep and the word Short indicates continuity No sourcing

t Thermocouple Types E, N, J, K, T, B, R, S, C, L, or U

t RTD

Measure 2,3, or 4

wire.

Source 2 wire.

100Ω Platinum (3926)

100Ω Platinum (385)

120Ω Nickel (672)

200Ω Platinum (385)

500Ω Platinum (385)

1000Ω Platinum (385)

10Ω Copper (427)

100Ω Platinum (3916)

p Pressure 27 modules ranging from 0 to 10 in. H2O

(2.5 kPa) to 0 to 10,000 psi (69,000 kPa) Note

s Loop Power 24 or 28V (22 mA max)

Note: Use an external hand pump or other pressure source as a pressure stimulus for the source pressure function.

Documenting Process Calibrator

Introduction

The ability to automatically log up to 8,000 data

points (Model 743B only).

A serial computer interface for

uploading/downloading tasks, lists, and results

(Model 743B only).

Automatic calibration procedures for transmitters

and limit switches using split screen

MEASURE/SOURCE mode.

Transmitter mode in which the calibrator can be

configured to emulate the functions of a process

instrument.

Built-in calculator with square-root function, and

accessible registers containing measure and

source values.

An optional bar code wand for entering

alphanumeric characters (Model 743B only).

• Measuring features:

Damping (smoothing of the last several

readings), with display indicator of damped

status.

Display of measurements in engineering units,

percent of scale, square-law inputs, or custom

units.

The ability to capture and display minimum and

maximum measured levels.

• Sourcing features:

The ability to set source values to engineering

units, percent of scale, or square-law outputs.

Manual and automatic stepping, and an output

ramp feature for testing limit switches. Trip

detect is either a 1V change or a continuity

status change (Open or Short) from one ramp

increment to the next.

Unless stated otherwise, everything in this manual

applies to both the Fluke 741B and 743B

Documenting Process Calibrators.

For performance testing and calibration instructions

order the

74X Series Calibration Manual

(PN

602505).

The phone number in the USA and Canada for

replacement parts is: 1-800-526-4731.

741B/743B

Users Manual

For service help in the USA and Canada call a Fluke

Service Center. For application or operation

assistance on Fluke products call:

USA and Canada: 1-800-44-FLUKE

(1-800-443-5853)

Europe: +31 402-678-200

Japan: +81-3-3434-0181

Singapore: +65-*-276-6196

Anywhere in the world: +1-425-356-5500

Or, visit Fluke’s Web site at www.fluke.com.

Standard Equipment

The items listed below and shown in Figure 1 are

included with your calibrator. If the calibrator is

damaged or something is missing, contact the place

of purchase immediately. To order replacement parts

or spares, see the user-replaceable parts list at the

end of this manual.

• TL24 industrial test leads (two sets)

• AC20 test clips (two sets)

• TP20 test probes (one set)

• BP7217 rechargeable nickel-cadmium battery

pack

• BC7210 battery charger with Instruction Sheet

• Adjustable quick-release strap (PN 946769)

• Jumper for three-wire RTD measurement

connections (two included, PN 944632)

•

741B/743B Users Manual

English (PN 644788)

French (PN 649688)

German (PN 649696)

Italian (PN 649704)

Spanish (PN 649670)

• DPC/TRACK Software utility version with

interface cable (9-pin male-female straight-

through, PN 943738).

Documenting Process Calibrator

Standard Equipment

Jumper

(2 Black)

AC20

Test Clip

(2 Red and 2 Black)

TP20

Test Probe

(1 Red and 1 Black)

789

456

123

RTD

CLEAR

(ZERO)

RANGE

ENTER

RTD

MEASSOURCE

mA mA

RTD

300V

MAX

30V MAX

TL24

Test Leads

(2 Red and 2 Black)

Strap

gj1f.eps

Figure 1. Standard Equipment

741B/743B

Users Manual

BP7217

Nickel-Cadmium

Battery Pack

Users

Manual

BC7210

Battery Charger

MUST BE RECYCLED OR DISPOSED

OF PROPERLY

DO NOT SHORT CIRCUIT OR

DISASSEMBLE

FLUKE

CORPORATION

U.S.A.

BP7217

NICKEL-CADMIUM

RECHARGEABLE BATTERY

USE CHARGING PROCEDURES

SPECIFIED IN MANUAL

DO NOT EXPOSE TO FIRE

REFER TO USERS MANUAL FOR

SAFE OPERATION

USE ONLY WITH FLUKE PRODUCTS

7.2V

Ni-Cd

1700 mAh

gj2f.eps

Figure 1. Standard Equipment (cont.)

Documenting Process Calibrator

Safety Information

This calibrator is designed and tested in accordance

with CAN/CSA C22.2 No. 1010.1-92, ANSI/ISA

S82.01-1994, UL3111 and EN610-10:1993. Use the

calibrator only as specified in this manual, otherwise

the protection provided by the calibrator may be

impaired.

A Warning identifies conditions and actions that pose

hazards to the user; a Caution identifies conditions

and actions that may damage the calibrator or the

equipment under test.

Symbols used on the calibrator and in this manual

are explained in Figure 2.

741B/743B

Users Manual

AC-Alternating Current

DC-Direct Current

CAUTION see explanation in manual

Overvoltage (Installation) Category

per IEC 1010-1 refers to the level

of Impluse Withstand Voltage protection provided. Typical locations

include; Mains Wall outlets, local appliances and PORTABLE

EQUIPMENT.

Fuse

Common (LO) Input equipotentiality

Recycling

Pressure

ON/OFF

Equipment protected throughout by DOUBLE INSULATION or

REINFORCED INSULATION

Conforms to relevent European Union directives.

Conforms to relevent Canadian Standards Association directives.

CAT

gj56f.eps

Figure 2. Definition of Symbols

To protect yourself, follow these safety guidelines:

• Do not use the calibrator if it is damaged. Before

you use the calibrator, inspect the insulating

cover. Look for cracks or missing plastic. Pay

particular attention to the insulation surrounding

the connectors.

• Disconnect the power and discharge all high-

voltage capacitors in the equipment under test

before testing resistance or continuity.

• Inspect the test leads for damaged insulation or

exposed metal. Check test lead continuity.

Replace damaged test leads before using the

calibrator.

Documenting Process Calibrator

Safety Information

• Do not use the calibrator if it operates

abnormally. Protection may be impaired. When

in doubt, have the calibrator serviced.

• Select the proper function and range for your

measurement.

• Use caution when working above 30V ac rms,

42V ac pk, or 60V dc. Such voltages pose a

shock hazard.

• When using the probes, keep your fingers away

from the probe contacts. Keep your fingers

behind the finger guards on the probes.

• Connect the common test lead before you

connect the live test lead. When you disconnect

test leads, disconnect the live test lead first.

• Do not operate the calibrator around explosive

gas, vapor, or dust.

• When using a pressure module, make sure the

process pressure line is shut off and

depressurized before you connect it to or

disconnect it from the pressure module.

• Disconnect test leads before changing to another

measure or source function.

• When servicing the calibrator, use only specified

replacement parts.

741B/743B

Users Manual

Getting Started Exercise

The following is a brief getting started exercise that

will make it easier to understand the instructions in

the rest of the manual.

1. When you first unpack the calibrator, you will

need to charge the battery. See Figure 9 and

charge the battery for 2 hours.

2. Reinstall the battery in the calibrator.

3. Connect the calibrator’s voltage output to its

voltage input as follows: connect leftmost pair of

jacks (V Ω RTD SOURCE) to the right most pair

of jacks (V MEAS). (See Figure 3.)

4. Press o to turn on the calibrator. Press u and

d to adjust the display contrast for the best

looking display. The calibrator powers up in the

dc voltage measurement function, and is taking

readings on the V MEAS pair of input jacks.

5. Press M to switch to the SOURCE screen.

The calibrator is still measuring dc voltage, and

you can see the active measurements at the top

of the display.

6. Press v to select dc voltage sourcing. Press

5 on the keypad and e to begin sourcing

5.0000V dc.

7. Now press M to go to the split-screen,

simultaneous MEASURE/SOURCE mode. The

calibrator is simultaneously sourcing dc volts

and measuring dc volts. You can see the

measurement readings in the top window, and

the active source value in the bottom window as

shown in Figure 4.

Documenting Process Calibrator

Getting Started Exercise

789

456

123

RTD

CLEAR

(ZERO)

ENTER

mA mA

RTD RTD

SOURCE

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

300V

MAX

RANGE

gj3f.eps

Figure 3. Jumper Connections for Demonstration

gj4s.eps

Figure 4. Measure/Source Example

741B/743B

Users Manual

Operating Features

Input and Output Jacks

Figure 5 shows the calibrator input and output jacks.

Table 2 explains their use.

Table 2. Input/Output Jacks and Connectors

No. Name Description

1 Battery Eliminator jack Jack for the Model BE9005 Battery Eliminator. Use the battery eliminator for bench-top

applications where ac line power is available. This input does not charge the battery.

2wSERIAL PORT

(743B Only) Connects the calibrator to an RS-232 serial port on a personal computer.

3 Pressure module

connector Connects the calibrator to a pressure module.

4 TC input/output Jack for measuring or simulating thermocouples. This jack accepts a miniature

polarized thermocouple plug with flat, in-line blades spaced 7.9 mm (0.312 in) center to

center.

5, 6 w MEAS V jacks Input jacks for measuring vo ltage, frequency, or three- or four-wire RTDs (Resistance

Temperature Detectors).

7, 8 w SOURCE mA,

MEAS mA Ω RTD

jacks

Jacks for sourcin g or measu ring current, measuring resistance and RTDs, and

supplying loop power.

9,10 w SOURCE V Ω

RTD jacks Output jacks for sourcing voltage, resistance, frequency, and for simulating RTDs.

Documenting Process Calibrator

Operating Features

789

456

123

MEAS

SOURCE

SETUPmA

RTD

CLEAR

(ZERO)

ENTER

985

mA mA

RTD RTD

SOURCE

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

300V

MAX

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki05f.eps

Figure 5. Input/Output Jacks and Connectors

741B/743B

Users Manual

Keys

Figure 6 shows the calibrator keys and Table 3

explains their functions. The softkeys are the four

unmarked blue keys just below the display. Softkey

functions are defined by the labels that appear above

the softkey during operation. Softkey labels and

other display text are shown in this manual in bold

type, for example, Choices.

MEAS

SOURCE

SETUPmA

RTD

789

456

123

ENTER

CLEAR

(ZERO)

mA mA

RTD RTD

SOURCE

300V

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki06f.eps

Figure 6. Keys

Documenting Process Calibrator

Operating Features

Table 3. Key Functions

No. Name Description

1M key Cycles the calibrator through MEASURE, SOURCE, and MEASURE/SOURCE modes.

2m key Selects mA (current) measure or source function. For loop power on/off, go to the Setup

mode.

3s key Enters and exits Setup mode to modify operating parameters.

4 Softkeys Perform the function defined by the label above each key on the display.

5C key Turns the backlight on and off.

6p key Selects the pressure measurement or sourcing function.

7t key Selects TC (thermocouple) or RTD (resistance temperature detector) measurement or

sourcing functions.

8r key Toggles between autorange and locked range, and increments range. Each time you press

r, th e calibrator locks on the next range. Press this key again for 2 seconds to resume

autorange. In calculator mode, provides the square root function.

9c key Clears a partial data entry, or zeros the output when in the SOURCE mode. When using a

pressure module, zeros the pressure module reading.

741B/743B

Users Manual

Table 3. Key Functions (cont.)

No. Name Description

10 u, d, L, and R

keys • Adjust t he d isplay contrast.

• Make choices from lists on the display.

• Increase or decrease the source level when using the step feature.

• In calculator mode, provide arithmetic functions (+ - ÷ ×).

e key Terminates a numeric entry when setting a source value, or confirms your choice in a

list. In calculator mode, provides the equals arithmetic operator (=).

q key Toggles between resistance and continuity functions in MEASURE mode, or selects

the resistance function in SOURCE mode.

13 Numeric keypad Used whenever a numeric entry is required.

h key Toggles between ac voltage and frequency functions in MEASURE mode, or selects

frequency output in SOURCE mode.

v key Selects the dc voltage function in MEASURE mode, or selects dc voltage in SOURCE

mode.

o key Turns the power on and off.

Documenting Process Calibrator

Operating Features

Display

Figure 7 shows the features of a typical display. The

display shown is MEASURE mode. Near the top of

the display is “Source Off.” This is the area of the

display that shows what is happening in the other

mode (SOURCE or MEASURE). The other parts of

the display are as follows:

• Status Bar: shows the time and date (if set in

Setup mode), and shows the status of Loop

Power, Battery Save, and Backlight Timeout; all

of which are set in Setup mode. The low battery

and backlight on annunciators also appear here.

• Mode Indicator: Shows whether the calibrator is

in MEASURE or SOURCE mode. In split screen

MEASURE/SOURCE mode, there is a Mode

Indicator for each window.

• Measured Value: Shows the measured value in

your choice of engineering units or percent of

scale.

• Range Status: Shows whether Auto Range is on,

and what range is currently being used.

• Custom Units Indicator: Shows that the displayed

units are custom. The original engineering units

of the measure or source function are not

displayed. The value may also be scaled.

• Secondary Value: Shows the measure or source

value in original engineering units whenever

scaling or custom units are active.

741B/743B

Users Manual

Measured Value

Range Status

Softkey Labels

Status Bar

Time and Date Display Battery Save Annunciator

Loop Power Annunciator

Mode Indicator

Custom Units Indicator

Secondary Value

Source Status

Undamped (Unsettled)

Indicator

gj7c.eps

Figure 7. Elements of a Typical Display

Documenting Process Calibrator

Setting Up the Calibrator

Using the Strap and Bail

After you unpack the calibrator, attach its carrying

strap as shown in Figure 8. You can adjust the strap

as necessary to hang the calibrator on any sturdy

support. Figure 8 also shows you how to open the

bail to stand the calibrator at a comfortable viewing

angle for benchtop use.

gj8f.eps

Figure 8. Using the Bail and Installing the Strap

741B/743B

Users Manual

Charging the Battery

wBefore you use the calibrator for the first time,

charge its battery pack for 2 hours in the external

battery charger.

Figure 9 shows how to remove the battery. Remove

the battery door and tap the calibrator with your

hand to get the battery out. Place the battery in the

charger and connect the charger to line power. The

charger automatically senses line voltage and

adjusts itself accordingly.

A discharged battery is fully charged in 2 hours or

less in fast-charge mode (steady indicator light on

the charger). Full charge is maintained after that

time in trickle-charge mode (blinking indicator light

on the charger). Switching between charging modes

is automatic. You can leave the battery pack on

trickle charge indefinitely without damage.

Note

When you remove a charged battery from

the charger, wait for the blinking indicator to

go off before you insert a discharged

battery. It takes about 2 seconds for the

battery charger to reset.

Documenting Process Calibrator

Setting Up the Calibrator

BATTERY ACCESSBATTERY ACCESS

gj9f.eps

Figure 9. Removing the Battery and Using the

Charger

741B/743B

Users Manual

Battery Life

Table 4 shows the operating time for a new, fully

charged battery pack. Calibrator performance is

guaranteed to meet specifications until the low

battery annunciator b located at the top right side

of the display appears and the beeper beeps every

4 seconds. When the b annunciator appears, stop

using the calibrator and charge the battery. If you

have a fully charged spare battery, exchange it with

the low battery.

WWarning

To avoid false readings, which could

lead to possible electric shock or

personal injury, replace the battery as

soon as the battery indicator (b)

appears.

The battery normally lasts for up to 1000 charge /

discharge cycles. To replace the battery, refer to

“Replacing the Battery” later in this manual for

instructions. For longest battery life and best

performance, wait for b to appear before you

charge the battery.

Table 4. Battery Life

Operating Modes Backlight Off Backlight On

Measure, continuous 6.5 Hours 6 Hours

Measure and source, with loop power on, continuous 3.5 Hours 3 Hours

Typical intermittent operation >8 Hours >8 Hours

Documenting Process Calibrator

Setting Up the Calibrator

Preserving Battery Life

An optional Auto Battery Save feature turns the

calibrator off after a selected idle time. The default

setting for Auto Battery Save is Off. When Auto

Battery Save is On, the E symbol shows in the

upper right corner of the display. The setting is

preserved after you turn off the power. Auto Battery

Save works the same when using the battery

eliminator. Turn on the Auto Battery Sa ve feature as

follows:

1. Press s.

2. Press d to highlight Off following Auto Battery

Save.

3. Press e or the Choices softkey.

4. Press u to highlight On, then press e.

5. To accept the timeout period shown on the

display, you can finish here. Press Done to exit

Setup mode and do not go on to step 6.

6. To change the timeout period, press d to

highlight the timeout period following Battery

Save Timeout.

7. Press e or the Choices softkey.

8. Enter your choice of timeout period in minutes

(accepted range: 1 to 120 minutes).

9. Press the

Done softkey.

10. Press the Done softkey or s to exit Setup

mode.

Using the Optional Battery Eliminator

Caution

To avoid damage to the calibrator, use

only Fluke Model BE9005 Series Battery

Eliminator, available from your Fluke

representative.

Where ac power is available, you can use the

optional Fluke Model BE9005 Battery Eliminator to

conserve battery power. When the battery eliminator

is used, the battery is internally disconnected, and

can be removed from the calibrator. The battery

eliminator does not charge the battery.

741B/743B

Users Manual

The battery eliminator is handy for troubleshooting

process instruments on the workbench, and for long-

term data logging. When you calibrate an instrument,

you will get best results using battery power.

Selecting the Display Language

The calibrator displays information in five languages.

English is the default. To change the display

language, proceed as follows:

1. Press s.

2. Press the third softkey from the left twice.

3. Press d three times.

4. Press e.

5. Press u or d to highlight your choice of

language.

6. Press e to confirm your choice. The

language you choose is the power-up default.

7. Press s to exit Setup mode.

Adjusting the Display Contrast

Press u or R to increase contrast. Press L or

d to decrease contrast. When the u and d keys

are being used to select an item from a list, for

example in Setup mode, use the L and R keys. In

calculator mode, all four direction keys are used for

arithmetic functions.

Displaying the Date and Time

The date and time can be shown at the top of the

display during normal operation. In Setup mode you

can turn this date and time display on or off. You can

also control the format used to display the date and

time. You should set the calendar and clock whether

or not you use the date and time display, since a

timestamp is applied to all saved results.

Documenting Process Calibrator

Setting Up the Calibrator

Proceed as follows to set up the time and date

displays:

1. Press

2. Press the

Next Page softkey. The display

appears as follows:

gj38s.eps

3. Use the u and d keys to move the cursor to

the parameter you want to change, then press

e or the Choices softkey to choose a

setting for that parameter. For example, the

following display appears after you select Date

Format:

gj39s.eps

4. Press u or d to move the cursor to the desired

date format.

5. Press e to go back to the s display.

6. Make another selection or press the Done

softkey or s to save your settings and exit

Setup mode.

741B/743B

Users Manual

Using the Backlight

Press C to toggle the display backlight on and off.

When the backlight is on, the G symbol shows at

the top of the display. You can minimize battery

usage by setting the calibrator to turn the display

backlight off automatically. When the backlight is on

and Auto Backlight Off is activated, the a symbol

shows at the top of the display. To automatically turn

off the backlight after a set time, proceed as follows:

1. Press s.

2. Press d to highlight Off following Auto Backlight

Off.

3. Press e or the Choices softkey.

4. Press u to highlight On, then press e.

5. To accept the timeout period shown on the

display, press Done to exit, and do not go on to

step 6.

6. To change the timeout period, press d to

highlight the timeout period following Backlight

Timeout.

7. Press e or the Choices softkey.

8. Enter your choice of timeout period in minutes

(accepted range: 1 to 120 minutes).

9. Press the

Done softkey.

10. Press the Done softkey or s to exit Setup

mode.

Personalizing the Calibrator

You can load your name or some other alphanumeric

identifier into the calibrator to be displayed at power-

up and in saved results. Proceed as follows to load

an identifier:

1. Press s.

2. Press

Next Page twice.

3. Press d to move the cursor to the same line as

ID.

Documenting Process Calibrator

Setting Up the Calibrator

4. Press

e or the Choices softkey. The

display appears as follows:

gj40s.eps

5. The ID string is shown at the bottom of the boxed

area. To erase a character, press the Back

Space softkey. To erase the whole string, press

6. Press u, d, L, or R to select a character, then

press e. Use the numeric keypad if you

want to enter a number.

7. Repeat step 6 until you are satisfied with the ID

string appearing in the window.

8. Press the

Done softkey.

9. Press the

Done softkey or s to exit Setup

mode.

741B/743B

Users Manual

Using Measure Mode

Note

To achieve best noise rejection and highest

accuracy performance, do not use the

battery eliminator, and tie all three common

jacks together.

The operating mode (i.e., MEASURE, SOURCE) is

shown in a reverse-video bar on the display. If the

calibrator is not in MEASURE mode, press M until

MEASURE is shown. You must be in MEASURE

mode to change any of the MEASURE parameters.

Measurement Ranges

The calibrator normally changes to the appropriate

measurement range automatically. The lower right

side of the display shows either “Range” or “Auto

Range” depending on the range status. Auto Range

switch points are shown in the specifications at the

end of this manual. When you press the r key,

the range is locked. Press it again to cycle to and

lock on the next higher range. Press it and hold it for

two seconds to revert to Auto Range.

If the range is locked, overrange inputs produce a

display of - - - - - -. In Auto Range, out of range inputs

produce a display of ! ! ! ! ! !.

Measuring Electrical Parameters

When you turn on the calibrator, it powers up in the

dc voltage measurement function. Figure 10 shows

electrical measurement connections. To select an

electrical measurement function from either

SOURCE or MEASURE/SOURCE mode, first press

M for MEASURE mode, then proceed as follows:

1. Press m for current, v for dc voltage, h

once for ac voltage or twice for frequency, or

q for resistance.

Documenting Process Calibrator

Using Measure Mode

mA mA VV

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

Red

Black

+–

gj10f.eps

Figure 10. Electrical Measurement Connections

741B/743B

Users Manual

Note

When measuring frequency, you are

prompted to select a frequency range. If you

expect the frequency you are measuring to

be below 20 Hz, press

to select the

lower frequency range, then press

2. Connect the test leads as shown in Figure 10,

depending on the measurement function.

Testing Continuity

When testing continuity, the beeper sounds and the

word Short appears on the display when the

resistance between the Ω MEAS jack and its

common jack is less than 25Ω. The word Open

appears when the resistance is greater than 400Ω.

Proceed as follows to test continuity:

1. Remove power from the circuit to be tested.

2. If necessary, press M for MEASURE mode.

3. Press q twice so that Open appears.

4. Connect the calibrator to the circuit to be tested

as Figure 10 shows.

Measuring Pressure

Many ranges and types of pressure modules are

available from Fluke. See “Accessories” near the

back of this manual. Before you use a pressure

module, read its Instruction Sheet. The modules

vary in how you use them, how you zero them, what

types of process pressure media are allowed, and

accuracy specification.

Figure 11 shows gage and differential modules.

Differential modules also work in gage mode by

leaving the low fitting open to atmosphere.

To measure pressure, attach the appropriate

pressure module for the process pressure to be

tested as described in the module’s Instruction

Sheet.

Proceed as follows to measure pressure:

Warning

To avoid a violent release of pressure in

a pressurized system, shut off the valve

and slowly bleed off the pressure before

you attach the pressure module to the

pressure line.

Documenting Process Calibrator

Using Measure Mode

Differential

HighLow

15 PSID/G

BURST PRESSURE 45 PSIG

PRESSURE MODULE

700

1 bar100 kPa

RANGE

Gage

RANGE

100 PSIG

BURST PRESSURE 300 PSIG

PRESSURE MODULE

700

7 bar700 kPa

gj11f.eps

Figure 11. Gage and Differential Pressure Modules

Caution

To avoid mechanically damaging the

pressure module, never apply more than

10 ft.-lb. of torque between the pressure

module fittings, or between the fittings

and the body of the module. Always

apply appropriate torque between the

pressure module fitting and connecting

fittings or adapters.

To avoid damaging the pressure module

from overpressure, never apply pressure

above the rated maximum printed on the

pressure module.

To avoid damaging the pressure module

from corrosion, use it only with specified

materials. Refer to the printing on the

pressure module or the pressure module

instruction sheet for the acceptable

material compatibility.

741B/743B

Users Manual

1. Connect a pressure module to the calibrator as

shown in Figure 12. The threads on the

pressure modules accept standard ¼ NPT pipe

fittings. Use the supplied ¼ NPT to ¼ ISO

adapter if necessary.

2. Press M for MEASURE mode.

3. Press p. The calibrator automatically senses

which pressure module is attached and sets its

range accordingly.

4. Zero the pressure module as described in the

module’s Instruction Sheet. Modules vary in

zeroing procedures depending on module type.

You MUST perform this step before you execute

a task that sources or measures pressure.

5. If desired, you can change pressure display

units to psi, mHg, inHg, mH2O, inH2O@,

inH2O@60°F, ftH2O, bar, g/cm2, or Pa. Metric

units (kPa, mmHg, etc.) are shown in Setup

mode in their base units (Pa, mHg, etc.).

Change the pressure display units as follows:

a. Press s.

b. Press Next Page twice.

c. Press e or the Choices softkey with

the cursor on Pressure Units.

d. Select the pressure units with u or d.

e. Press e.

f. Press Done.

Documenting Process Calibrator

Using Measure Mode

789

456

123

MEAS

SOURCE

SETUPmA

RTD

CLEAR

(ZERO)

RANGE

ENTER

Differential

Module

Tank

Isolation

Valve

Gage

Module

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

DOCUMENTING PROCESS CALIBRATOR

743B

ki12c.eps

Figure 12. Connections for Measuring Pressure

741B/743B

Users Manual

Measuring Temperature

Using Thermocouples

The calibrator supports eleven standard

thermocouples, each identified with an alpha

character: E, N, J, K, T, B, R, S, C, L, or U. Table 5

summarizes the ranges and characteristics of the

supported thermocouples.

To measure temperature using a thermocouple,

proceed as follows:

1. Attach the thermocouple leads to the appropriate

TC miniplug, then to the TC input/output as

shown in Figure 13.

One pin is wider than the

other. Do not try to force a miniplug in the wrong

polarization

Note

If the calibrator and the thermocouple plug

are at different temperatures, wait one

minute or more for the connector

temperature to stabilize after you plug the

miniplug into the TC input/output.

1. If necessary, press M for MEASURE mode.

2. Press t. The display prompts you to select

the thermocouple type.

3. Select the desired thermocouple type using the

u or d followed by e.

4. If necessary, you can change between °C or °F

Temperature Units as follows:

a. Press s.

b. Press the

Next Page softkey twice.

c. Use the u and d keys to move the cursor

to the desired parameter. Then press either

e or the Choices softkey to choose a

setting for that parameter.

d. Press u or d to move the cursor to the

desired setting.

e. Press e to go back to the s

display.

f. Press the Done softkey or s to exit Setup

mode.

5. If necessary, you can change between ITS-90 or

IPTS-68 Temperature Scale in Setup mode. The

procedure is the same as steps a-f above.

Documenting Process Calibrator

Using Measure Mode

Table 5. Thermocouple Types Accepted

Type Positive Lead Positive Lead (H)

Color Negative Lead Specified Range

Material ANSI* IEC** Material (°C)

E Chromel Purple Violet Constantan -250 to 1000

N Ni-Cr-Si Orange Pink Ni-Si-Mg -200 to 1300

J Iron White Black Constantan -210 to 1200

K Chromel Yellow Green Alumel -270 to 1372

T Copper Blue Brown Constantan -250 to 400

B Platinum (30% Rhodium) Gray Platinum (6% Rhodium) 600 to 1820

R Platinum (13% Rhodium) Black Orange Platinum -20 to 1767

S Platinum (10% Rhodium) Black Orange Platinum -20 to 1767

C *** Tungsten (5% Rhenium) White Tungsten (26% Rhenium) 0 to 2316

L (DIN J) Iron Constantan -200 to 900

U (DIN T) Copper Constantan -200 to 600

*American National Standards Institute (ANSI) device negative lead (L) is always red.

**International Electrotechnical Commission (IEC) device negative lead (L) is always white.

*** Not an ANSI designation but a Hoskins Engineering Company designation.

741B/743B

Users Manual

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

Process Temperature

Warning

30V maximum to

TC Miniplug

gj12f.eps

Figure 13. Measuring Temperature with a Thermocouple

Documenting Process Calibrator

Using Measure Mode

Using Resistance-Temperature Detectors

(RTDs)

The calibrator accepts RTD types shown in Table 6.

RTDs are characterized by their resistance at 0°C

(32°F), which is called the “ice point” or R0. The most

common R0 is 100Ω. Most RTDs come in a three-

terminal configuration. The calibrator accepts RTD

measurement inputs in two-, three-, or four-wire

connections as shown in Figure 15. A four-wire

configuration provides the highest measurement

precision, and two-wire provides the lowest

measurement precision.

Table 6. RTD Types Accepted

RTD Type Ice Point (R0) Material αRange (°C)

Pt100 (3926) 100ΩPlatinum 0.003926Ω/°C -200 to 630

*Pt100 (385) 100ΩPlatinum 0.00385Ω/°C -200 to 800

Ni120 (672) 120ΩNickel 0.00672Ω/°C -80 to 260

Pt200 (385) 200ΩPlatinum 0.00385Ω/°C -200 to 630

Pt500 (385) 500ΩPlatinum 0.00385Ω/°C -200 to 630

Pt1000 (385) 1000ΩPlatinum 0.00385Ω/°C -200 to 630

Cu10 (427) 9.035Ω ** Copper 0.00427Ω/°C -100 to 260

Pt100 (3916) 100ΩPlatinum 0.003916Ω/°C -200 to 630

*Per IEC 751-Standard **10Ω @ 25°C

741B/743B

Users Manual

To measure temperature using an RTD input,

proceed as follows:

1. If necessary, press M for MEASURE mode.

2. Press t twice so that Select RTD Type shows.

3. Press u or d to select the desired RTD type.

4. Press e.

5. Press u or d to select a 2-, 3-, or 4- wire

connection.

6. Attach the RTD to input jacks as the display or

Figure 15 shows. Use the supplied jumper

between the mA Ω RTD MEAS low jack and the

V MEAS low jack as shown if you are using a 3-

wire connection.

7. Press e.

Caution

Do not force a dual banana plug between

any two jacks in the horizontal

orientation. Doing so will damage the

jacks. Use the supplied jumper wire when

needed for RTD measurements. You can

use a dual banana plug in the vertical

orientation. See Figure 14.

Documenting Process Calibrator

Using Measure Mode

mA mA

RTD RTD

SOURCE

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

300V

MAX

RTD

MEASSOURCE

mA mA

RTD

300V

MAX

30V MAX

RTD

MEASSOURCE

mA mA

RTD

300V

MAX

30V MAX

WRONG

gj14f.eps

Figure 14. Using a Jumper Correctly

8. If necessary, you can change between °C or °F

temperature units in Setup mode as follows:

a. Press s.

b. Press the

Next Page softkey twice.

c. Use the u and d keys to move the cursor

to the parameter you which to change, then

press e or the Choices softkey to

choose a setting for that parameter.

d. Press u or d to move the cursor to the

desired setting.

e. Press e to go back to the s

display.

f. Press the Done softkey or s to exit Setup

mode.

9. If necessary, you can change between ITS-90 or

IPTS-68 Temperature Scale in Setup mode. The

procedure is the same as steps a through f

above.

741B/743B

Users Manual

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

RTD

gj15f.eps

Figure 15. Measuring Temperature with an RTD

Documenting Process Calibrator

Using Measure Mode

Measurements in Percent of Scale

This feature lets you scale the measurements in

accordance with a particular process instrument’s

response. Percent of scale works for linear-output

transmitters or square-law transmitters such as

differential pressure transmitters that report flow rate.

Linear-Output Transmitters

1. If necessary, press M for MEASURE mode.

2. Select a measurement function (m, v, q,

t, or p) as previously described.

3. Press the Scale softkey.

4. Use the numeric keypad to enter the 0% of scale

value (0% Value).

5. Press e.

6. Use the numeric keypad to enter the 100% of

scale value (100% Value).

7. Press e.

8. Leave Mode set to %.

9. Press the Done softkey.

Percent of scale remains in effect until you press the

Scale softkey again or change to another

measurement function.

Square-Law Process Variables

When you select √ within scaling, the calibrator takes

the square root of its input and displays the

measurement in percent. For example, when

connected to the output of a delta-pressure

transmitter, the calibrator reading is proportional to

flow rate.

1. If necessary, press M for MEASURE mode.

2. Select a measurement function (m, v, q,

t, or p) as previously described.

3. Press the Scale softkey.

4. Use the numeric keypad to enter the 0% of scale

value (0% Value).

741B/743B

Users Manual

5. Press

6. Use the numeric keypad to enter the 100% of

scale value (100% Value).

7. Press e.

8. Set

Mode to √.

9. Press e.

10. Press the Done softkey.

Percent of scale remains in effect until you press the

Scale softkey again or change to another

measurement function. Set scaling Mode to Eng.

Units to return to normal operation.

Customizing mV Input Units

The calibrator works with any measurement

accessory that converts an input parameter to a

linear millivolt output. Use the Custom Units feature

for this purpose. After you name and scale a custom

measurement unit, the display shows both the new

scaled custom unit and the actual measured

parameter.

Proceed as follows to set up a custom unit:

1. When measuring the millivolt output of the

accessory, press the Custom Units softkey.

2. Enter the name of the custom units (up to four

characters), for example PH (for pH), using the

alphanumeric entry window, then press e.

3. Press the

÷10 or ×10 softkey as many times as

you need to select the proper scaling, then press

While Custom Units are active, the w symbol shows

on the display to the right of the custom unit. Once

you have programmed the custom measurement

unit, the custom unit is available for calibration

procedures in split-screen MEASURE/SOURCE

mode. To cancel Custom Units, press the

Custom Units softkey again.

Warning

To avoid possible electric shock, when

using Custom Units, always refer to the

Secondary Value displayed below and to

the right of the main display for the

actual value of the measurement in native

engineering units.

Documenting Process Calibrator

Using Measure Mode

Damping Your Measurements

The calibrator normally applies a software filter to

dampen measurements in all functions except

continuity. The specifications assume that damping is

turned on. The damping method is a running average

of the last several measurements. Fluke

recommends that you leave damping on. Turning

damping off may be useful when measurement

response is more important than accuracy or noise

reduction. If you want to turn off damping, press the

More Choices softkey twice, then press the Dampen

softkey so that Off appears. Press Dampen again to

turn damping back on. The default state is On.

Note

If a measurement falls outside a random noise

window, a new average is started. If damping is

turned off, or until measurements are fully

damped, the

symbol is displayed.

741B/743B

Users Manual

Using Source Mode

The operating mode (i.e., MEASURE, SOURCE) is

shown in a reverse-video bar on the display. If the

calibrator is not in SOURCE mode, press M until

SOURCE is shown. You must be in SOURCE mode

to change any of the SOURCE parameters.

Sourcing Electrical Parameters

To select an electrical sourcing function, proceed as

follows:

1. Connect the test leads as shown in Figure 16,

depending on the source function.

2. Press M for current, v for dc voltage, h

for frequency, or q for resistance.

3. Enter the desired output value, then press

e. For example, to source 5.0V dc, press

v 5 . 0 e.

Note

If you are sourcing frequency, respond to the

display prompt to select a zero-symmetric

sine or positive square wave. The amplitude

you specify is p-p amplitude.

4. To change the output value enter a new value

and press e.

Note

If you are sourcing current, wait for the

symbol to go out before you use the output.

5. To set the output value to 0 in the present source

function, press c.

6. To turn off sourcing completely, press c twice.

Note

Use the source current function to drive a

current loop. This is different than the loop

power function in which the calibrator is

powering a process instrument. To source

loop power, use the

Loop Power

function

accessible from Setup mode.

Documenting Process Calibrator

Using Source Mode

mA mA VV

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

mA mA VV

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

Red

Black

–

Red

Black

Common

gj16f.eps

Figure 16. Electrical Sourcing Connections

741B/743B

Users Manual

Simulating a 4 to 20 mA Transmitter

You can configure the calibrator as a load on a

current loop through the SOURCE mA function.

When you press the M key in SOURCE mode, the

display prompts you to select Source mA or Simulate

Transmitter. When you Source mA the calibrator is

sourcing current, and when you Simulate Transmitter

the calibrator is sourcing a variable resistance to

regulate current to the specified value. Connect an

external loop supply to the positive (top) mA jack as

shown in Figure 17.

Note

Also see “Transmitter Mode,” in which the

calibrator can be set up to temporarily take

the place of a two-wire process transmitter.

Documenting Process Calibrator

Using Source Mode

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Loop

Power

Supply

+24

UUT

Black

Red

–

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki17c.eps

Figure 17. Connections for Simulating a 4 to 20 mA Transmitter

741B/743B

Users Manual

Supplying Loop Power

The calibrator supplies loop power at 28V or 24V dc.

The 28V setting supplies enough current for two or

three 4-20 mA devices on the loop in addition to the

two-wire transmitter but uses more battery power.

Use the 24V setting if there are two or fewer devices

on the loop in addition to the two-wire transmitter.

(Each device on a typical 4- to 20-mA loop has a

resistance of 250Ω, thus dropping 5V at 20 mA. A

typical transmitter must have 11V minimum in order

to operate correctly at its top end.)

When loop power is enabled, the mA (middle

column) jacks are dedicated to sourcing and

measuring the current loop. This means that the

SOURCE mA, measure RTD, and measure Ω

functions are not available (see Table 8, later in this

manual.)

Connect the calibrator in series with the instrument

current loop as Figure 18 shows. Proceed as follows

to source loop power:

1. Press s for Setup mode.

2. Note that following Loop Power, Disabled is

highlighted. Press e.

3. Use the u or d arrow keys to select Enabled

24V or Enabled 28V.

4. Press e.

5. Press the

Done softkey.

Documenting Process Calibrator

Using Source Mode

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Red

TEST DC PWR

+–+–

–+

Black

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki18c.eps

Figure 18. Connections for Supplying Loop Power

741B/743B

Users Manual

Sourcing Pressure

The calibrator provides a source pressure display

function that requires the use of an external pressure

hand pump. Use this function to calibrate instruments

that require a pressure source or differential pressure

measurement. See Figures 19 and 34 for information

about that application.

Many ranges and types of pressure modules are

available from Fluke. See “Accessories” near the

back of this manual. Before you use a pressure

module, read its Instruction Sheet. The modules vary

in how you use them, how you zero them, what types

of process pressure media are allowed, and

accuracy specification.

To use the source pressure display, see Figure 19

and proceed as follows:

Warning

To avoid a violent release of pressure in

a pressurized system, shut off the valve

and slowly bleed off the pressure before

you attach the pressure module to the

pressure line.

Caution

To avoid mechanically damaging the

pressure module, never apply more than

10 ft.-lb. of torque between the pressure

module fittings or between the fittings

and the body of the module. Always

apply appropriate torque between the

pressure module fitting and connecting

fittings or adapters.

To avoid damaging the pressure module

from overpressure, never apply pressure

above the rated maximum printed on the

pressure module.

To avoid damaging the pressure module

from corrosion, use it only with specified

materials. Refer to the printing on the

pressure module or the pressure module

instruction sheet for the acceptable

material compatibility.

Documenting Process Calibrator

Using Source Mode

1. Connect a pressure module and pressure source

to the calibrator as Figure 19 shows. The threads

on the pressure modules accept ¼ NPT fittings.

Use the supplied ¼ NPT to ¼ ISO adapter if

necessary.

2. If necessary, press M for SOURCE mode.

3. Press p. The calibrator automatically senses

which pressure module is attached and sets its

range accordingly.

4. Zero the pressure module as described in the

module’s Instruction Sheet. Modules vary in

zeroing procedures depending on module type.

You MUST perform this step before you execute

a task that sources or measures pressure.

5. Pressurize the pressure line with the pressure

source to the desired level as shown on the

display.

6. If desired, you can change pressure display units

to psi, mHg, inHg, mH2O, inH2O, inH2O@60°F,

ftH2O, bar, g/cm2, or Pa. Metric units (kPa,

mmHg, etc.) are shown in Setup mode in their

base units (Pa, mHg, etc.). Change the pressure

display units as follows:

a. Press s.

b. Press Next Page twice.

c. Press e with the cursor on Pressure

Units.

d. Select the pressure units with the u or d

keys.

e. Press e.

f. Press the Done softkey.

741B/743B

Users Manual

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

Hand

Pump

Pressure

Module

MEAS

SOURCE

SETUP

RTD

789

456

123

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki19c.eps

Figure 19. Connections for Sourcing Pressure

Documenting Process Calibrator

Using Source Mode

Simulating Thermocouples

Note

Refer to “Measuring Temperature” earlier in the

manual for a table of data relating to

thermocouple types supported by the calibrator.

Connect the calibrator TC input/output to the

instrument under test with thermocouple wire and the

appropriate thermocouple mini-connector (polarized

thermocouple plug with flat, in-line blades spaced 7.9

mm [0.312 in] center to center).

One pin is wider than

the other. Do not try to force a miniplug in the wrong

polarization

. Figure 20 shows this connection.

Proceed as follows to simulate a thermocouple:

1. Attach the thermocouple leads to the appropriate

TC miniplug, then to the TC input/output as

Figure 13 shows.

2. If necessary, press M for SOURCE mode.

3. Press t for the display that prompts you to

enter thermocouple type.

4. Press the u or d key followed by e to

select the desired thermocouple type.

5. Press the u or d key followed by e to

select Linear T (default), or Linear mV, (for

calibrating a temperature transmitter that

responds linearly to millivolt inputs).

6. Enter the temperature you want to simulate as

prompted by the display and press e.

Note

If you use copper wire instead of

thermocouple wire, the reference junction is

no longer inside the calibrator. The reference

junction is moved to the instrument

(transmitter, indicator, controller, etc.) input

terminals. You must measure this external

reference temperature accurately and enter

it into the calibrator. Do this by pressing

and setting

Ref. Junc. Compensat

and

Ref.

Junc. Temp.

After you enter the external

reference temperature, the calibrator

corrects all voltages to compensate for this

new reference junction temperature.

741B/743B

Users Manual

Simulating RTDs

Note

Refer to Table 6 for information about RTD

(Resistance-Temperature Detector) types

supported by the calibrator.

Connect the calibrator to the instrument under test as

shown in Figure 21. Proceed as follows to simulate

an RTD (Resistance-Temperature Detector):

1. If necessary, press M for SOURCE mode.

2. Press t until the select RTD type display is

showing.

3. Press the u or d keys followed by e to

select the desired RTD type.

4. Enter the temperature you want to simulate as

prompted by the display, then press e.

Documenting Process Calibrator

Using Source Mode

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

TEST DC PWR

++–

–+

Color depends

on type of TC

TC Miniplug

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki20c.eps

Figure 20. Connections for Simulating a Thermocouple

741B/743B

Users Manual

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

RTD

Transmitter

-PS

+PS

-IN

+IN

Red

Black

gj21f.eps

Figure 21. Connections for Simulating an RTD

Documenting Process Calibrator

Using Source Mode

Sourcing in Percent of Scale

This feature lets you scale the output in accordance

with the input requirements of a particular process

instrument’s response. Percent of scale works for

linear-responding transmitters, or square-root

responding transmitters.

Linear-Responding Transmitters

1. If necessary, press M for SOURCE mode.

2. Select a source function (m, v, q, t,

or p) as previously described and enter a

value.

3. Press the Scale softkey.

4. Use the numeric keypad to enter the 0% of scale

value (0% Value).

5. Press e.

6. Use the numeric keypad to enter the 100% of

scale value(100% Value).

7. Leave Mode set to %.

8. Press the Done softkey.

Percent of scale remains in effect until you press the

Scale softkey again or you change the source

function.

Square-Law Process Variables

When you select √ within scaling, the calibrator

output value is the percent value entered, squared,

and converted to engineering units.

1. If necessary, press M for SOURCE mode.

2. Select a source function (m, v, q, t,

or p) as previously described.

3. Press the Scale softkey.

4. Use the numeric keypad to enter the 0% of scale

value (0% Value).

5. Press e.

6. Use the numeric keypad to enter the 100% of

scale value(100% Value).

7. Set Mode to √.

8. Press e.

741B/743B

Users Manual

9. Press the

Done softkey.

Percent of scale remains in effect until you press the

Scale softkey again.

Stepping and Ramping the Output Value

Two features are available for adjusting the value of

source functions, except pressure, which requires

that you use an external pressure source:

• Stepping the output manually with the u and d

keys, or in automatic mode.

• Ramping the output with optional continuity or V

trip detect.

Using Manual Step

The manual Step feature allows you to select a step

size in engineering units (mV, V, mA, °C, etc.) or %

of scale. Stepping the output in % of scale is useful

for quickly jumping between 0% and 100% (set step

size = 100%) or 0-50-100% (set step size = 50%).

Stepping works in SOURCE and in

MEASURE/SOURCE modes. Proceed as follows to

select a step size:

1. Refer to the appropriate “Using Source Mode”

subheading earlier in this manual (e.g.,

“Sourcing Electrical Parameters”) and connect

the calibrator to the circuit to be tested.

2. If necessary, press M for SOURCE mode.

3. Set the calibrator for the desired source value.

4. If you want to step the source value in % of

scale, set the % of scale value as described

previously under “Sourcing in Percent of Scale.”

5. Press the Step softkey.

6. Use the numeric keypad to enter the step size in

the units shown on the display.

7. Press the Done softkey.

8. Now you can adjust the output in steps by

pressing the u and d keys.

Documenting Process Calibrator

Using Source Mode

Using Auto Step

To have the calibrator make a sequence of steps

automatically, either once through the sequence or

repetitively, proceed as follows:

1. Refer to the appropriate “Using Source Mode”

subheading earlier in this manual (e.g.,

“Sourcing Electrical Parameters”) and connect

the calibrator to the circuit to be tested.

2. If necessary, press M for SOURCE mode.

3. Set the calibrator for the desired source value.

4. If you want to step the source value in % of

scale, set the % of scale value as described

previously under “Sourcing in Percent of Scale.”

5. Press the Step softkey.

6. Press the Auto Step softkey.

7. Select values for the following parameters as

you are prompted by the display:

• Starting point (in units or % of scale)

• Ending point

• Number of steps

• Time per step

• Single shot or continuous repetition

• Ramp pattern if continuous

• Start delay

8. To start automatic stepping, press the Start Step

softkey. The softkey label changes to Stop Step.

9. To stop automatic stepping, press the Stop Step

softkey.

10. Press the Done softkey to resume normal

operation.

741B/743B

Users Manual

Ramping the Output

Ramping sweeps the source up or down in value.

Use the ramp feature to check a limit switch or alarm,

or any time you want a smoothly increasing or

decreasing output function. You can set the

calibrator to ramp up or down in engineering units

(mV, V, mA, °C, etc.) or % of scale.

During ramping, the output is adjusted 4 times per

second. The size of the steps is determined by your

choices of endpoints and ramp time. For example, if

you set the calibrator to ramp from 1 mV to 1V over

10 seconds, the output is adjusted in approximately

25 mV steps.

Ramping continues until the selected limit is reached,

or until an optional trip condition is encountered. The

optional trip detect works as follows: during ramping,

the calibrator checks for either a 1V change in dc

voltage or a change in continuity status (Open or

Short) from one ¼ second interval to the next.

Proceed as follows to ramp (i.e., sweep the source):

1. Refer to the appropriate heading earlier in this

manual (e.g., “Sourcing Electrical Parameters”)

and connect the calibrator to the circuit to be

tested. Figure 22 shows an example.

2. To automatically stop ramping if a trip condition

is detected, connect a voltage trip circuit to the V

MEAS jacks or a continuity trip circuit to the mA

Ω RTD MEAS jacks. (Continuity detection is not

available when sourcing current.)

3. If necessary, press M for SOURCE mode.

4. Set the calibrator for the desired source value as

previously described.

5. If you want to ramp the output in % of scale, set

% of scale as described previously under

“Sourcing in Percent of Scale.”

6. Press the More Choices softkey.

Documenting Process Calibrator

Using Source Mode

7. Press the

Ramp softkey. The display changes to

the following:

gj41s.eps

8. Fill in the parameters as prompted. Enter the

Start Value, End Value, and Ramp Time.

9. To automatically stop ramping if a trip condition

is detected, set the Trip Detect to Enabled, and

select Voltage or Continuity as the trip function.

10. Press the Done softkey. Note the RAMP

annunciator next to SOURCE at the top of the

display.

11. Select a low-to-high ramp or a high-to-low ramp

with the Ramp Up/Down softkey.

12. To start ramping, press the Start Ramp softkey.

13. Ramping continues until a trip is detected (if

enabled), the ramp time expires, or you press

the Stop Ramp softkey.

741B/743B

Users Manual

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

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123

Input

4 – 20 mA

Trip Relay

Output

–+

+–

Source mA

Voltage Trip Detect

Red

Black

Red

Black

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki22c.eps

Figure 22. Checking a Relay Output Trip Alarm

Documenting Process Calibrator

Simultaneous Measure/Source

Use the MEASURE/SOURCE mode to calibrate or

emulate a process instrument. Press M so that a

split screen display appears as shown below.

gj42s.eps

Table 7 shows the functions you can use

simultaneously when Loop Power is disabled. Table

8 shows the functions you can use simultaneously

when Loop Power is enabled.

You can use the Step or Auto Step features to adjust

the output in MEASURE/SOURCE mode, or you can

use the calibration routine provided when you press

the As Found softkey.

The following two softkeys displayed in

MEASURE/SOURCE mode are for use in calibrating

a process instrument.

• As Found, which lets you set up a calibration

routine to obtain and record as found data.

• Auto Step, which lets you set up the calibrator for

auto-stepping, as previously described.

Instructions for calibrating a process instrument

follow.

741B/743B

Users Manual

Table 7. Simultaneous MEASURE/SOURCE Functions with Loop Power Disabled

Measure Function Source Function

dc V mA Freq ΩTC RTD Pressure

dc V ••••• • •

mA • ••• • •

ac V ••••• • •

Frequency (≥20 Hz) ••••• • •

Low Frequency (<20 Hz)

Ω • ••• • •

Continuity • ••• • •

TC •••• • •

RTD • ••• • •

3W RTD • ••• • •

4W RTD • ••• • •

Pressure ••••• •

Documenting Process Calibrator

Simultaneous Measure/Source

Table 8. Simultaneous MEASURE/SOURCE Functions with Loop Power Enabled

Measure Function Source Function

dc V mA Freq ΩTC RTD Pressure

dc V • • • • • •

mA • • • • • •

ac V • • • • • •

Frequency (≥20 Hz) • • • • • •

TC • • • • •

Pressure • •• • •

741B/743B

Users Manual

Calibrating a Process Instrument

When the calibrator is in simultaneous

MEASURE/SOURCE mode, a built-in calibration

routine is activated when you press the As Found

softkey. (As Found data are the test results showing

the condition of a transmitter before it is calibrated.)

Additionally, the Model 743 runs tasks (procedures)

that are developed using a host computer and

compatible application software.

Caution

Calibration of pulsed or multiplexed RTD

instruments with settling times of less

than 100 ms may result in errors, and is

not recommended.

Generating “As Found” Test Data

The following example shows how to generate

found

data for a thermocouple temperature

transmitter. The way you set up the template for the

procedure is similar for Delta-P and 1 Pt. and 2 Pt.

Switch tests.

In this case the calibrator is simulating the output of a

thermocouple and measuring the resulting current

from the transmitter. Other transmitters use this

same method. Just go back to MEASUREMENT or

SOURCE mode and change the operating

parameters before you press As Found.

1. Connect the test leads to the instrument under

test as shown in Figure 23. The connections

simulate a thermocouple and measure the

corresponding output current.

2. If necessary, press M for MEASURE mode.

3. Press m.

4. Press M for SOURCE mode.

5. Press t.

6. Use the u and d keys to select the

thermocouple type, then press e.

7. Enter a source value, for example 100 degrees,

then e.

Documenting Process Calibrator

Calibrating a Process Instrument

8. Press

M for MEASURE/SOURCE mode. The

display changes to:

gj42s.eps

9. Press the As Found softkey, followed by the

Instrument softkey. The display changes to:

gj44s.eps

10. Enter values for 0% and 100% of 4.0 mA and

20.0 mA, respectively. Set Tolerance to 0.5% of

span. (Use other values if necessary for your

application.)

741B/743B

Users Manual

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Black

Power

Supply

TEST DC PWR

++–

–+

Original

Circuit Wiring

Red

Color depends

on type of TC

ENTER

CLEAR

(ZERO)

RANGE

Miniplug

DOCUMENTING PROCESS CALIBRATOR

743B

ki23c.eps

Figure 23. Calibrating a Thermocouple Temperature Transmitter

Documenting Process Calibrator

Calibrating a Process Instrument

11. If the process instrument needs more time to

settle than the calibrator’s normal settling time

(about 2 seconds) at each new stimulus level,

enter that time in seconds for Delay.

12. Use the arrow keys to move the cursor down to

enter 0% and 100% values for SOURCE

temperature. Our example uses 100°C and

300°C.

13. If the instrument calibration procedure requires

you to enter either the measurement value or

source value by hand at each step, press the

User Value softkey, for “user entered values.”

Custom Units lets you define your own units such

as “PH.” See “Creating Custom Measurement

Units,” earlier in this manual for an example.

When you use custom units, the w symbol

appears next to the value on the display and in

results.

Press the Done softkey after you have

programmed your custom unit.

14. The Strategy is the number of test points and

which test points are performed rising and falling

in percent of scale. Our example uses five points

(0%, 25%, 50%, 75%, and 100%), rising only.

Rising is indicated by the up arrow on the

display. Change to another test strategy by

pressing e on this line. A list of strategies

appears from which to choose. Select one, then

press Done.

15. When you finish selecting the calibration

parameters, the display appears as follows:

gj45s.eps

741B/743B

Users Manual

16. Press the Done softkey to accept the calibration

parameters. The display changes to:

gj46s.eps

17. You now have the choice of starting an

automatic test or stepping through the test points

manually. Press the Auto Test softkey to have

the calibrator run through the tests automatically.

(Abort gets you out of the calibration procedure.)

The tests begin at the zero point, sourcing the

correct temperature (a voltage) and measuring

the corresponding current from the transmitter.

As soon as a measurement has settled and been

captured, the calibrator moves to the next step.

Because the calibrator waits for the

measurement to stop changing, the Auto Test

works correctly for instruments with built-in

damping. The error of the expected measured

value is shown in the top left of the measure

window.

18. The calibrator moves to the remaining set of

points. For temperature and electrical parameter

calibration, the points are done automatically. If

you are sourcing pressure, the calibrator pauses

at each step for you to adjust the pressure

source. When the tests are complete, an error

summary table such as the following is

displayed.

gj47s.eps

Documenting Process Calibrator

Calibrating a Process Instrument

19. In the results summary test, failures are

highlighted. An adjustment is required in this

example because three tests show failures. The

failures were outside the ±0.5% tolerance that

we selected.

20. Either press the Done softkey to save the data,

or the Abort softkey to delete the data and start

over.

You can see the saved data entry and recall the

table for later viewing through the Review

Memory softkey during normal operation. With

Model 743 you can upload this data to a host

computer running compatible application

software.

Adjusting the Transmitter

Proceed as follows to make the calibration

adjustments to the transmitter. (Always refer to the

transmitter manufacturer’s instructions to locate the

adjustment controls and connection points for your

transmitter.)

1. Press the Done softkey while viewing the results

summary.

2. Press the Adjust softkey. The calibrator sources

0% of span (100°C in this example) and displays

the following softkeys:

• Go to 100%/Go to 0%

• Go to 50%

• As Left

• Exit Cal

3. Adjust the transmitter output for 4 mA then press

the Go to 100% softkey.

741B/743B

Users Manual

4. Adjust the transmitter output for 20 mA.

5. If the span was adjusted in step 4, you must go

back and repeat steps 3 and 4 until no more

adjustment is required.

6. Now check the transmitter at 50%. If it is within

specification, your adjustment is complete. If not,

adjust the linearity and begin this procedure

again at step 3.

“As Left” Test Run

Proceed as follows to generate and record

as left

data for the thermocouple temperature transmitter

you have just adjusted.

1. Press the

As Left softkey to record

as left

data.

2. Press the

Auto Test softkey to begin an

automatic sequence through all the test points,

or you can step through the tests manually.

3. When the tests are complete, observe the error

summary table, such as the following.

gj48s.eps

An asterisk (*) next to a measure or source value

indicates an unsettled value (g annunciator)

when the measurement was taken.

4. If all the results are within specification, as they

are this time, press the Done softkey. An entry in

memory is made for

as left

data.

Documenting Process Calibrator

Calibrating a Process Instrument

Test Comments

Model 743B runs tasks (custom procedures) that are

developed using a host computer and compatible

application software. A task may display a list of

proposed comments during execution. When the

comment list is displayed, select a comment to be

saved with the test results by pressing the u and d

keys followed by e.

Calibrating a Delta-Pressure Flow

Instrument

The procedure to calibrate a √ instrument is the

same as for other instruments, as just described,

with the following differences:

• Source square-root is automatically enabled

after the As Found calibration template is

complete.

• Measure/Source displays are in engineering

units.

• The measurement percentage is automatically

corrected for the transmitter’s square-root

response, and is used to compute instrument

errors.

You select the √ instrument procedure in a menu

after you press the As Found softkey.

741B/743B

Users Manual

Calibrating a Limit Switch

The procedure to calibrate a limit switch also uses

the As Found and As Left calibration templates.

Select either the 1 Pt. Switch or 2 Pt. Switch

procedure in a menu after you press the As Found

softkey. Figure 24 defines the terminology used in

calibrating limit switches.

The template to set up the limit switch procedure lets

you select the following parameters:

• Switch sense (normally open or closed).

• For each setpoint:

• Setpoint value.

• Setpoint tolerance.

• High limit or low limit.

• Minimum deadband.

• Maximum deadband.

Switch A

Open

Switch B

Setpoint

Reset

Switch A

Setpoint

Switch B

Open

Switch B

Closed

Switch A

Closed

Process

Variable

Switch A: Low Limit Switch B: High Limit

Deadband

Reset

gj24f.eps

Figure 24. Limit Switch Terminology

Documenting Process Calibrator

Calibrating a Process Instrument

The procedure for testing a pressure limit switch

follows. The switch in this example sets at a high limit

of 10 psi. The set state is a closed switch contact.

For pressure switches, you use the Manual Test

choice. For testing switches that do not require

sourcing pressure, you can use the Auto Test choice.

1. Connect the test leads between the pressure

switch contact output and the mA Ω RTD

(middle) jacks on the calibrator.

2. Connect the pressure module to the calibrator,

and connect a pressure line to the limit switch.

Leave the pressure line vented to atmosphere.

3. If necessary, press M for MEASURE mode.

4. Press q q for the continuity measure

function.

5. Press M for SOURCE mode.

6. Press p for the pressure source function.

7. Press c to zero the pressure module.

8. Press M.

9. Press the As Found softkey.

10. Highlight 1 Pt. Switch Test from the menu and

press e.

11. Press e to modify the parameters for

Setpoint 1.

12. Make the following selections:

Setpoint 1 = 10.000 psi

Setpoint Type = High

Set State = Short

13. Press the Done softkey.

14. Set the Tolerance to 0.5 psi.

15. The next parameters, Deadband Min and

Deadband Max, are optional. Do not set them in

this example.

741B/743B

Users Manual

16. Set Trip Function to Trip Cont by cycling through

the choices with the e key.

17. Press the Done softkey.

18. Press the Manual Test softkey.

19. Close the pressure line vent and slowly bring the

pressure up to the trip point.

20. When the switch sets, slowly bring the pressure

back down until the switch resets. You can

repeat this cycle as many times as you want.

21. Press the Done softkey and view the results.

22. Press the Done softkey and if desired, enter Tag,

S/N, and/or ID.

23. Press the Done softkey.

24. Now press the Adjust softkey if you want to

adjust the limit switch and test it again.

25. Use the softkeys to control the calibrator, and

adjust the limit switch as necessary.

26. Press the Done softkey.

27. Press the As Left softkey to run the test again

with the same parameters. Results from the As

Found and As Left tests are saved in the

calibrator memory for later viewing, or in the

case of the 743B, uploading.

The procedure for limit switches that respond to

other parameters work similarly. When you do a 2 Pt.

Limit Switch Test, you simply follow the prompts on

the display for testing the first switch, changing test

leads, and testing the second limit switch.

Documenting Process Calibrator

Transmitter Mode

You can set up the calibrator so that a varying input

(MEASURE) controls the output (SOURCE), like a

transmitter. This is called “Transmitter mode.” In

Transmitter mode, the calibrator can be temporarily

used as a substitute for a defective or suspect

transmitter.

Warning

Do not use Transmitter mode in any

environment that requires intrinsic safe

equipment and practices.

Caution

Transmitter mode is for diagnostic

purposes only. Use a fresh battery. Do

not use the calibrator in place of a

transmitter for extended periods.

To set up the calibrator to emulate a transmitter,

proceed as follows:

1. Disconnect the control bus wires from the

transmitter output (loop current or dc V control

signal).

2. Connect test leads from the appropriate

calibrator SOURCE jacks to the control wires in

place of the transmitter.

3. Disconnect the process input (e.g.,

thermocouple) from the transmitter.

4. Connect the process input to the appropriate

calibrator MEASURE jacks or input connector.

5. If necessary, press M for MEASURE mode.

6. Press the appropriate function key for the

process input.

741B/743B

Users Manual

7. Press

M for SOURCE mode.

8. Press the appropriate function key for the control

output (e.g., v or m). If the transmitter is

connected to a current loop that has a power

supply, select Simulate Transmitter for the

current output choice.

9. Select a source value, e.g., 4 mA.

10. Press M for MEASURE/SOURCE mode.

11. Press More Choices until the Transmitter Mode

softkey appears.

12. Press the Transmitter Mode softkey.

13. Set the 0% and 100% values for MEASURE and

SOURCE on the display. You can select Linear

or √ for the transfer function.

14. Press Done.

15. The calibrator is now in Transmitter mode. It is

measuring the process input and sourcing the

control signal output proportional to the input.

16. To change any of the Transmitter mode

parameters, press Change Setup, and repeat the

process in step 13.

17. To exit Transmitter mode, press the Abort

softkey.

Documenting Process Calibrator

Memory Operations

Saving Results

As Found/As Left test results are automatically saved

at the end of each test routine. Any other time during

MEASURE, SOURCE, or MEASURE / SOURCE you

can press the Save softkey to save the data on the

display for later review.

After you press Save, the calibrator saves the

information on the display and shows a saved result

index number, the date and time, and the percentage

of memory available, as in the following display:

gj49s.eps

If you want to add information to the saved data, the

calibrator has a way for you to do so. If you press the

Continue softkey, the display prompts you to enter

the instrument tag identifier (Tag), instrument serial

number (S/N), and operator name (ID), as shown in

the following display:

741B/743B

Users Manual

gj50s.eps

Enter alpanumeric characters into the highlighted

field with the optional bar code wand (743 only) or

the calibrator keys.

To enter alphanumeric characters using the

calibrator keys, press e with the cursor on the

field you would like to change (for example, Tag,

above). The display presents you with an

alphanumeric entry window as follows:

gj51s.eps

1. Enter numbers using the numeric keypad, and

letters by highlighting the desired character with

the u, d, L, and R keys followed by e .

Enter a space character by pressing the Space

softkey, followed by e.

2. When the entry showing at the bottom of the

window is what you want, press the Done

softkey.

Documenting Process Calibrator

Memory Operations

Reviewing Memory

Press the More Choices softkey until Review Memory

appears, then press the Review Memory softkey to

recall and view saved results.

When you press the Review Memory softkey, the

display changes to:

gj52s.eps

Press u or d and e or the Go to Result

softkey to view a saved result.

Data Logging (Model 743B Only)

With Model 743B only, you can record a series of

measurements for later uploading to a host computer

running compatible application software. You can log

up to 8000 readings, depending on the reading rate,

duration, and how much memory is being used for

other things such as tasks or saved results. You

enter the reading rate and duration in minutes as

shown next.

gj53s.eps

741B/743B

Users Manual

Proceed as follows to log data:

1. If necessary, press M for MEASURE mode.

2. Press the

More Choices softkey.

3. Press the

Log softkey.

4. A list appears from which you select a reading

rate (1, 2, 5, 10, 20, 30, or 60 readings per

minute). Use the u or d key to select the

reading rate.

5. Press e.

6. Press d to move the cursor to Duration.

7. Use the numeric keypad to enter the duration in

minutes, followed by e. The maximum

duration will depend on the reading rate and how

much memory is available to log data. The table

below gives an estimate of the limits for duration,

assuming that no memory is being used for other

purposes.

Readings/Minute Maximum

Readings Approximate

Duration

1 8000 133 hours

2 8000 66 hours

5 8000 26 hours

10 8000 13 hours

20 8000 6 hours

30 7980 4 hours

60 7980 2 hours

Caution

A long logging duration can exceed the

life of a battery charge. Use a fresh

battery and the appropriate duration, or

use the optional battery eliminator to

avoid losing power during a logging

session. If b appears during a log

session, the session is terminated and

data collected to that point is saved.

Documenting Process Calibrator

Memory Operations

8. After you enter your choice of duration, you can

see how much memory that duration would

consume. See the Memory Used and Memory

Remaining percentage figures on the display.

Memory Used indicates the percentage of

available memory that will be used by the

specified log. Memory Remaining indicates the

percentage of memory that will remain unused

after logging is complete.

9. Press the

Done softkey. The display changes to:

gj54s.eps

10. Note the LOG annunciator next to MEASURE.

Press the Start Logging softkey to start taking

data.

11. The calibrator will continue storing data points

until the duration has elapsed, or until you press

the Done softkey. Either way of terminating

logging causes the calibrator to save the data as

a memory item that can be uploaded to a host

computer running compatible application

software.

741B/743B

Users Manual

Recording Min and Max Measurements

You can set the display to record and show the

maximum and minimum readings. Min and Max

readings are always undamped, even if Dampen is

On. Press the More Choices softkey twice, then press

the Min Max softkey to turn on this feature. Press the

c key to reset the Min Max registers. Press the

Min Max softkey again to revert to the normal display.

The following figure shows the display with Min Max

on:

gj55s.eps

Running a Preloaded Task (743B only)

Press the More Choices softkey until the Tasks

softkey appear, then press Tasks to view the list of

tasks (procedures) downloaded from a host

computer. Tasks are 743B calibrator configurations,

saved with a procedure name, for example the type

and manufacturer of a specific transmitter. A task

configures the calibrator for transmitter calibration

with all the calibration parameters (source and

measure functions, 0% and 100% levels, test

strategy) predefined.

While the task is controlling the calibrator, the

Continue softkey becomes Continue Task.

Clearing Memory

In Setup mode, highlight the Clear Memory choice

and press e to clear all the memory:

• Saved results

• Min Max data

• Log data sets (Model 743 only)

A confirmation message appears so that you do not

inadvertently erase the memory.

Documenting Process Calibrator

Using the Built-in Calculator

Using the Buil t-i n Calculator

For solving mathematical equations that involve the

calibrator’s source or measured value, you can use

the calibrator’s built-in calculator. The present

measure and source values, including units, are

always available to be inserted into an equation at a

single keystroke. The calibrator keeps measuring

and sourcing during calculator operation.

Start the calculator from the SOURCE, MEASURE,

or MEASURE/SOURCE mode by pressing the Calc

softkey. You may have to press More Choices to get

the Calc softkey.

After you press Calc, the display, number keys, and

keys with calculator functions (r, L, R, u,

d, and e) become an algebraic-entry

calculator.

Press Done when you want to resume normal

calibrator operation.

Saving to and Recalling from the

Registers

When the calibrator is in calculator mode, the top half

of the display shows three register names and their

contents:

• MEASURE (the present measured value)

• SOURCE (the present sourced value)

• REGISTER (temporary storage for your use)

Insert the contents of any register into a calculation

by pressing the Recall softkey followed by the softkey

for the desired register.

Press Store to copy the number from the calculator

display (lower half) into REGISTER to temporarily

save the number for later use, or into SOURCE.

741B/743B

Users Manual

Using the Calculator to Set the Source

Value

When you store to SOURCE, the calibrator presents

you with a choice of unit multipliers when appropriate

(e.g., mV or V), then starts sourcing that value. The

calibrator ignores attempts to store out-of-range

values to SOURCE.

Quick Guide to Applications

The following figures show test lead connections and

which calibrator function to use for many different

applications.

Documenting Process Calibrator

Quick Guide to Applications

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Black

Red

0 to 1V dc

Input

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki25c.eps

Figure 25. Calibrating a Chart Recorder

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Circuit

250

Ω

Black

Red

Measure V

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki26c.eps

Figure 26. Measuring Voltage Drop

741B/743B

Users Manual

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE SETUP

RTD

789

456

123

BLACK

RED

Measure

ENTER

CLEAR

(ZERO) RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki27c.eps

Figure 27. Monitoring AC Line Voltage and Frequency

Documenting Process Calibrator

Quick Guide to Applications

RANGE

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

ENTER

CLEAR

(ZERO)

SIGNAL

TEST

+–

Pressure

Module

Red

Black

Measure Pressure

Source mA

Loop Power Disabled

DOCUMENTING PROCESS CALIBRATOR

743B

ki28c.eps

Figure 28. Calibrating a Current-to-Pressure (I/P) Transmitter

741B/743B

Users Manual

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Black

Power

Supply

TEST DC PWR

++–

–+

Original

Circuit Wiring

Red

Measure mA

Loop Power Disabled

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki29c.eps

Figure 29. Measuring the Output Current of a Transmitter

Documenting Process Calibrator

Quick Guide to Applications

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Black

Red

Measure

Resistance

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki30c.eps

Figure 30. Measuring a Precision Resistor

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Circuit

Black

Red

Source

Resistance

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki31c.eps

Figure 31. Sourcing Resistance

741B/743B

Users Manual

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Red

Black

Measure

Continuity

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki32c.eps

Figure 32. Checking a Switch

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Black

Red

Measure

Frequency

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki33c.eps

Figure 33. Checking a Tachometer

Documenting Process Calibrator

Quick Guide to Applications

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Hand Pump

SIGNAL

TEST

+–

Pressure

Module

Red

Black

Measure mA

Source Pressure

Loop Power Enabled 24V

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki34c.eps

Figure 34. Calibrating a Pressure-to-Current (P/I) Transmitter

741B/743B

Users Manual

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Output

Input

–+

+–

Input

0 – 1mV, 0 – 10mV,

0– 100mV, 1 – 5V,

0 – 1V, 0 – 10V

Output

4–20 mA

Source mV or V

Measure mA

Red

Black

Red

Black

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki35c.eps

Figure 35. Calibrating a mV to Current Transmitter

Documenting Process Calibrator

Quick Guide to Applications

mA mA V

RTD RTD

SOURCE

300V

MAX

30V

MAX

30V

MAX

30V

MAX

MEAS

CAT

MEAS

SOURCE

SETUP

RTD

789

456

123

Black

Red

Measure

Frequency

ENTER

CLEAR

(ZERO)

RANGE

DOCUMENTING PROCESS CALIBRATOR

743B

ki36c.eps

Figure 36. Checking a Vortex Sheeding Flowmeter

741B/743B

Users Manual

Communicating wi th a PC (Model

743 Only)

You can upload and download procedures and

saved results to a PC. An IBM PCTM-compatible

personal computer, Microsoft Windows, and Fluke

DPC/TRACK

 software, or a qualified Fluke partner’s

software are required. A custom serial interface

cable for the 743B is included with

DPC/TRACK

Refer to the

DPC/TRACK Users Manual

for further

instructions.

Maintenance

Note

Additional maintenance instructions,

including a calibration procedure and a list of

replaceable parts is available in the 74X

Series Calibration Manual (PN 602505).

Replacing the Battery Pack

Replace the battery pack when it no longer holds a

charge for the rated interval. The battery normally

lasts for up to 1000 charge/discharge cycles. To

order a replacement battery, order Model BP7217

Nickel-Cadmium Battery Pack. In the USA and

Canada call Fluke Service Parts at 1-800-526-4731.

Outside the USA and Canada call +1 425-356-5500.

Note

Do not mix spent Nickel-Cadmium

batteries with the solid waste stream. Spent

batteries should be disposed of by a

qualified recycler or hazardous materials

handler. Contact your authorized Fluke

Service Center for recycling information.

Documenting Process Calibrator

Maintenance

Internal Lithium Backup Battery

A lithium battery maintains the memory contents and

Setup settings. The normal service life for the lithium

battery is 3 to 5 years.

You cannot access the lithium battery. Return the

calibrator to an authorized Fluke service center if you

need to replace the lithium battery. When the lithium

battery is 3 years old, replace it at the next

calibration interval as a preventive maintenance

procedure.

Cleaning the Calibrator

Clean the calibrator and pressure modules with a

soft cloth dampened with water or water and mild

soap.

Caution

To avoid damaging the plastic lens and

case, do not use solvents or abrasive

cleansers.

Calibration Data

The date the calibrator was last calibrated shows on

the calibration sticker and on the last screen in Setup

mode. The CAL. STATUS number on the sticker

should always match the Calibration Status number

in the calibration s screen. Calibration of the

741B and 743B is to be done by qualified personnel.

Refer to the

74X Series Calibration Manual

(PN

602505).

In Case of Difficulty

If the calibrator operates abnormally, do not use it.

Protection may be impaired. When in doubt, have the

calibrator servi ced.

If the display is blank or unreadable, but the beeper

works when you turn the calibrator on, make sure the

contrast is not maladjusted. Press the u and

d keys to adjust the contrast.

741B/743B

Users Manual

If the calibrator will not turn on, check for a dead

battery or unplugged battery eliminator. If the

calibrator is receiving power, the display flashes

when you turn it on. To see if the calibrator is

receiving power, cup your hands around the display

to shield it from ambient light, and watch the display

as you press the o button. If there is a flash, but the

calibrator does not power up normally, have the

calibrator servi ced.

Service Center Calibration or Repair

Calibration, repairs, or servicing not covered in this

manual should be performed only by qualified

service personnel. If the calibrator fails, check the

nickel-cadmium battery pack first, and replace it if

needed.

Verify that the calibrator is being operated in

accordance with the instructions in this manual. If the

calibrator is faulty, send a description of the failure

with the calibrator. Pressure modules do not need to

accompany the calibrator unless the module is faulty

also. Be sure to pack the calibrator securely, using

the original shipping container if it is available. Send

the equipment postage paid and insured, to the

nearest Service Center. Fluke assumes no

responsibility for damage in transit.

A Fluke 741B or 743B calibrator covered by the

warranty will be promptly repaired or replaced (at

Fluke’s option) and returned to you at no charge.

See the back of the title page for warranty terms. If

the warranty period has expired, the calibrator will be

repaired and returned for a fixed fee. If the calibrator

or pressure module is not covered under the

warranty terms, contact an authorized service center

for a price quote for repair.

To locate an authorized service center, call Fluke

using any of the phone numbers listed below, or visit

us on the World Wide Web: www.fluke.com

USA and Canada: 1-800-44-FLUKE

(1-800-443-5853)

Europe: +31 402-678-200

Japan: +81-3-3434-0181

Singapore: +65-*-276-6196

Anywhere in the world: +1-425-356-5500

Documenting Process Calibrator

Maintenance

Replacement Parts

Table 9 lists the Fluke part number of each user-

replaceable part for Models 741B and 743B. See

“Standard Equipment,” near the front of this manual,

and “Accessories,” later in this manual for model or

part numbers of standard and optional equipment.

Table 9. Replacement Parts

Item Fluke Part Number

Adjustable Quick-Release Strap 946769

Rubber Side Plug 938274

Battery Door 938357

Bail 938340

Bail Screw 943431

Case Screw 942797

Lens for Model 741B 949487

Lens for Model 743B 949490

Input/Output Jack Decal 946756

BC7210 Battery Charger Instruction Sheet (multilingual) 944020

Note: Refer to “Standard Equipment” and “Accessories” for model or part numbers for most replaceable equipment.

741B/743B

Users Manual

100

Accessories

The Fluke accessories listed below are compatible

with the 741B and 743B calibrators. For more

information about these accessories and their prices,

contact your Fluke representative.

• Fluke-700SW DPC/TRACK application software

for Microsoft Windows. DPC/TRACK provides

everything you need to interface the 743B with a

PC-compatible computer. With DPC/TRACK,

you can compose and load tasks (procedures),

unload results, generate reports, and create an

instrument calibration database.

• Fluke-700BCW Bar Code Wand

• Fluke-700-IV Current Shunt, for simultaneous dc

current sourcing and measuring.

• Pressure Modules, Fluke model numbers listed

below. (Differential models also operate in gage

mode.) Contact your Fluke representative about

new pressure modules not listed here.

Fluke-700P01: 0 to 10” H2O (differential, dry)

Fluke-700P02: 0 to 1 psi (differential, dry)

Fluke-700P22: 0 to 1 psi (differential, wet)

Fluke-700P03: 0 to 5 psi (differential, dry)

Fluke-700P23: 0 to 5 psi (differential, wet)

Fluke-700P04: 0 to 15 psi (differential, dry)

Fluke-700P24: 0 to 15 psi (differential, wet)

Fluke-700P05: 0 to 30 psi (gage, wet)

Fluke-700P06: 0 to 100 psi (gage, wet)

Fluke-700P07: 0 to 500 psi (gage, wet)

Fluke-700P08: 0 to 1,000 psi (gage, wet)

Fluke-700P09: 0 to 1,500 psi (gage, wet)

Fluke-700P29: 0 to 3,000 psi (gage, wet)

Fluke-700P30: 0 to 5,000 psi (gage, wet)

Fluke-700P31: 0 to 10,000 psi (gage, wet)

Documenting Process Calibrator

Accessories

101

Fluke-700PA3: 0 to 5 psi (absolute, wet)

Fluke-700PA4: 0 to 15 psi (absolute, wet)

Fluke-700PA5: 0 to 30 psi (absolute, wet)

Fluke-700PA6: 0 to 100 psi (absolute, wet)

Fluke-700PV3: 0 to -5 psi (vacuum, dry)

Fluke-700PV4: 0 to -15 psi (vacuum, dry)

Fluke-700PD2: ±1 psi (dual range, dry)

Fluke-700PD3: ±5 psi (dual range, dry)

Fluke-700PD4: ±15 psi (dual range, dry)

Fluke-700PD5: −15/+30 psi (dual range, wet)

Fluke-700PD6: −15/+100 psi (dual range, wet)

Fluke-700PD7: −15/+200 psi (dual range, wet)

• Fluke-700PCK Pressure Module Calibration Kit

(requires pressure calibration equipment and a

PC compatible computer)

• Fluke-700TC1 TC miniplug kit

• Fluke-700TC2 TC miniplug kit

• C781 Soft Carrying Case

• C789 Soft Carrying Case

• C700 Hard Carrying Case

• BE9005 Series Battery Eliminator for bench-top

use

• BP7217 Ni-Cd Battery Pack

•

74X Series Calibration Manual

(PN 602505)

• TL series test leads

• AC series test lead clips

• TP series test lead probes

• 80C series mini thermocouple connectors

• 80T-IR Infrared Temperature Probe, -18°C to

260°C

• PV350 Pressure/Vacuum Module

741B/743B

Users Manual

102

• 80T-150U Temperature Probe

• 80PK series thermocouples

• 80i-410 Clamp-on DC/AC Current Probe

• 80i-1010 Clamp-on DC/AC Current Probe

• 80i-500s Clamp-on AC Current Probe (requires

the Y9108 adapter)

• 80i-1000s Clamp-on AC Current Probe (requires

the Y9108 adapter)

• 80i-kW Current and Power Probe

Specifications

All specifications apply from +18°C to +28°C unless

stated otherwise.

All specifications assume a 5 minute warmup period.

Measurement specifications are valid only when

Damping is turned on. When damping is turned off,

or when the g annunciator is displayed, floor

specifications are multiplied by 3. Floor specifications

are the second part of the specifications, usually

expressed as "% of full scale." The measure

pressure, temperature, and frequency functions are

specified only with damping on.

The standard specification intervals for the 741B and

743B are 1 and 2 years. Typical 90-day source and

measurement accuracy can be estimated by dividing

the 1 year "% of Reading" or "% of Output"

specifications by 2. Floor specifications, expressed

as "% of f.s.", remain constant.

To achieve the best noise rejection, use battery

power and tie all three common jacks together.

Documenting Process Calibrator

Specifications

103

DC Voltage Measurement

Range Resolution Models 741B and 743B

% of Reading +% of Full Scale

1 Year 2 Year

110 mV 1 µV 0.025% + 0.015% 0.05% + 0.015%

1.1V 10 µV 0.025% + 0.005% 0.05% + 0.005%

11V 100 µV 0.025% + 0.005% 0.05% + 0.005%

110V 1 mV 0.05% + 0.005% 0.1% + 0.005%

300V 10 mV 0.05% + 0.005% 0.1% + 0.005%

Temperature Coefficient: (0.001% of rdg. + 0.0015% f.s.)/°C in the ranges -10 to 18°C and 28 to 50°C

Input Impedance: 5 MΩ

Common Mode Error: 0.008% f.s./(Common Mode Volt)

Maximum Input Voltage: 300V rms

741B/743B

Users Manual

104

AC Voltage Measurement

Frequency Range Models 741B and 743B

% of Reading + Number of Counts

1 Year 2 Year

20 Hz to 40 Hz 2% + 10 2% + 10

40 Hz to 500 Hz 0.5% + 5 0.5% + 5

500 Hz to 1 kHz 2% + 10 2% + 10

1 kHz to 5 kHz 10% + 20 10% + 20

Ranges : 1.1000V, 11.000V, 110.00V, 300.0V rms

Resolution: 11.000 counts in all ranges except 300V; 3,000 counts on 300V range.

Input Impedance: 5 MΩ and <100 pF

Temperature Coefficient: 10% of specification/°C in the ranges -10 to 18°C and 28 to 50°C

Input Coupling: ac

Maximum Input Voltage: 300 V rms

Minimum Input Voltage: 0.5V above 1 kHz

Specifications apply for 10% to 100% of voltage range.

Documenting Process Calibrator

Specifications

105

DC Current Measurement

Range Resolution Models 741B and 743B

% of Reading +% of Full Scale

1 Year 2 Year

30 mA 1 µA 0.01% + 0.015% 0.02% + 0.015%

110 mA 10 µA 0.01% + 0.015% 0.02% + 0.015%

Temperature Coefficient: (0.001% of rdg. + 0.002% f.s.)/°C in the ranges -10 to 18°C and 28 to 50°C

Common Mode Error: 0.01% f.s./(Common Mode Volt)

Maximum Input Voltage: 30V dc

Resistance Measurement

Range Resolution Models 741B and 743B

% of Reading + ohms

1 Year 2 Year

11Ω0.001Ω0.05% + 0.05 0.075% + 0.05

110Ω0.01Ω0.05% + 0.05 0.075% + 0.05

1.1 kΩ0.1Ω0.05% + 0.5 0.075% + 0.5

11 kΩ1Ω0.1% + 10 0.1% + 10

Temperature Coefficient: (0.01% f.s. + 2 mΩ) /°C in the ranges -10 to 18°C and 28 to 50°C

Common Mode Error: 0.005% f.s/(Common Mode Volt)

Maximum Input Voltage: 30V dc

741B/743B

Users Manual

106

Continuity Testing

Tone Resistance

Continuous tone

May or may not get tone

No tone

<25Ω

25 to 400Ω

>400Ω

Frequency Measurement

Ranges Accuracy

1 Year 2 Year

1.00 Hz to 109.99 Hz 0.05 Hz 0.05 Hz

110.0 Hz to 1099.9 Hz 0.5 Hz 0.5 Hz

1.100 kHz to 10.999 kHz 0.005 kHz 0.005 kHz

11.00 kHz to 50.00 kHz 0.05 kHz 0.05 kHz

Minimum Amplitude for Frequency Measurement (square wave):

<1 kHz: 300 mV p-p

1 kHz to 30 kHz: 1.4 V p-p

>30 kHz: 2.8V p-p

Maximum input:

<1 kHz: 300V rms

>1 kHz: 30V rms

Input Impedance: 5 MΩ

For frequency measurement less than 109.99 Hz, specifications apply for signals with a slew rate greater than 5

volt/millisecond.

Documenting Process Calibrator

Specifications

107

DC Voltage Output

Range Resolution Models 741B and 743B

% of Output + % of Full Scale

1 Year 2 Year

110 mV 1 µV 0.01% + 0.005% 0.015% + 0.005%

1.1 V 10 µV 0.01% + 0.005% 0.015% + 0.005%

15 V 100 µV 0.01% + 0.005% 0.015% + 0.005%

Temperature Coefficient: (0.001% of output + 0.001% of f.s.)/°C in the ranges -10 to 18°C and 28 to 50°C

Maximum Output Current: 10 mA

Loading: (0.001% f.s. + 1 µV)/ mA

Common Mode Error: 0.008% f.s/(Common Mode Volt)

Maximum Input Voltage: 30V dc

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DC Current Output

Range/Mode Resolution Models 741B and 743B

% of Output + % of Full Scale

1 Year 2 Year

22 mA/ Source mA 1 µA 0.01% + 0.015% 0.02% + 0.015%

22 mA/ Simulate Transmitter

(Current Sink) 1 µA 0.02% + 0.03% 0.02% + 0.03%

Maximum Burden Voltage: 24V

Temperature Coefficient: (0.003% of output + 0.003% of f.s.)/°C in the ranges -10 to 18°C and 28 to 50°C

Common Mode Error: 0.008% f.s/(Common Mode Volt)

Maximum Input Voltage: 30V dc

Specification applies for currents between 2 mA and 22 mA. For current below 2 mA, typical accuracy is 0.15% of full

scale.

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109

Resistance Sourcing

Range Resolution Models 741B and 743B

% of Output + ohms

1 Year 2 Year

11.000Ω1 mΩ0.01% + 0.02 0.02% + 0.02

110.00Ω10 mΩ0.01% + 0.04 0.02% + 0.04

1.1000 kΩ100 mΩ0.02% + 0. 5 0.03% + 0.5

11.000 kΩ1Ω0.03% + 5 0.04% + 5

Temperature Coefficient: (0.01% of f.s.)/°C in the ranges -10 to 18°C and 28 to 50°C

Maximum and Minimum Current through Source Resistance:

11Ω Range: 3 mA dc max, 0.1 mA dc min

110Ω Range: 3 mA dc max, 0.1 mA dc min

1.1 kΩ Range: 3 mA dc max, 0.01 mA dc min

11 kΩ Range: 1 mA dc max, 0.01 mA dc min

Common Mode Error: 0.008% f.s/(Common Mode Volt)

Maximum Input Voltage: 30V dc

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Frequency Sourcing

Range Accuracy

1 and 2 Year

0.00 Hz to 10.99 Hz 0.01 Hz

11.00 Hz to 109.99 Hz 0.1 Hz

110.0 Hz to 1099.9 Hz 0.1 Hz

1.100 kHz to 21.999 kHz 0.002 kHz

22.000 kHz to 50.000 kHz 0.005 kHz

Waveform Choices: Zero-symmetric sine or positive square wave, 50% duty cycle.

Amplitude: 0.1 to 10V pk

Amplitude Accuracy:

0 Hz to 1099 Hz: 3% of output + 0.5% f.s

1.1 kHz to 10.9 kHz: 10% of output + 0.5% f.s

11 kHz to 50 kHz: 30% of output + 0.5% f.s

Maximum Input Voltage: 30V dc

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111

Temperature, Thermocouples

Temperature, TCs, Models 741B and 743B

Type Range °CMeasure °C Source °C

1 Year 2 Year 1 Year 2 Year

E -250 to -200 1.3 2.0 0.6 0.9

-200 to -100 0.5 0.8 0.3 0.4

600 to 1000 0.4 0.6 0.2 0 .3

N -200 to -100 1.0 1.5 0.6 0.9

-100 to 900 0.5 0.8 0.5 0.8

900 to 1300 0.6 0.9 0.3 0 .4

J -210 to -100 0.6 0.9 0.3 0.4

-100 to 800 0.3 0.4 0.2 0.3

800 to 1200 0.5 0.8 0.2 0 .3

K -200 to -100 0.7 1.0 0.4 0.6

-100 to 400 0.3 0.4 0.3 0.4

400 to 1200 0.5 0.8 0.3 0 .4

1200 to 1372 0.7 1.0 0.3 0.4

T -250 to -200 1.7 2.5 0.9 1.4

-200 to 0 0.6 0.9 0.4 0.6

0 to 400 0.3 0.4 0.3 0 .4

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Temperature, Thermocouples (cont.)

Type Range °CMeasure °C Source °C

1 Year 2 Year 1 Year 2 Year

B 600 to 800 1.3 2.0 1.0 1 .5

800 to 1000 1.0 1.5 0.8 1 .2

1000 to 1820 0.9 1.3 0.8 1.2

R -20 to 0 2.3 2.8 1.2 1.8

0 to 100 1.5 2.2 1.1 1 .7

100 to 1767 1.0 1.5 0.9 1 .4

S -20 to 0 2.3 2.8 1.2 1.8

0 to 200 1.5 2.1 1.1 1 .7

200 to 1400 0.9 1.4 0.9 1 .4

1400 to 1767 1.1 1.7 1.0 1.5

C 0 to 800 0.6 0.9 0.6 0.9

800 to 1200 0.8 1.2 0.7 1 .0

1200 to 1800 1.1 1.6 0.9 1.4

1800 to 2316 2.0 3.0 1.3 2..0

L -200 to -100 0.6 0.9 0.3 0 .4

-100 to 800 0.3 0.4 0.2 0.3

800 to 900 0.5 0.8 0.2 0 .3

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113

Temperature, Thermocouples (cont.)

Type Range °CMeasure °C Source °C

1 Year 2 Year 1 Year 2 Year

U -200 to 0 0.6 0.9 0.4 0.6

0 to 600 0.3 0.4 0.3 0 .4

Sensor inaccuracies not included.

Accuracy with external cold junction; for internal junction add 0.2°C

Resolution: 0.1°C

Temperature Scale: ITS-90 or IPTS-68, selectable

Compensation: ITS-90 per NIST Monograph 175 for B,R,S,E,J,K,N,T; IPTS-68 per IEC 584-1 for B,R,S,E,J,K,T;

IPTS-68 per DIN 43710 for L,U.

Temperature Coefficient: 0.05°C/°C in the range -10 to 18°C and 28 to 50°C

Common Mode Error: 0.01°C/(Common Mode Volt)

Maximum Input Voltage: 30V

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Temperature, Resistance Temperature Detectors

Temperature, RTDs, Model 741B and 743B

Type (α)Range °C Measure °C Source °C

1 Year 2 Year 1 Year 2 Year

100Ω Pt(3926) -200 to 0 0.3 0.4 0.1 0.2

0 to 630 0.5 0.8 0.2 0.4

100Ω Pt(385) -200 to 0 0.3 0.5 0.1 0.2

0 to 400 0.5 0.8 0.2 0.4

400 to 800 0.8 1.0 0.4 0.5

120Ω Ni(672) -200 to 260 0.3 0.4 0.1 0.2

200Ω Pt(385) -200 to 0 0.3 0.5 0.1 0.2

0 to 400 0.5 0.8 0.2 0.4

400 to 630 0.8 1.0 0.4 0.5

500Ω Pt(385) -200 to 0 0.3 0.5 0.1 0.2

0 to 400 0.5 0.8 0.2 0.4

400 to 630 0.8 1.0 0.4 0.5

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Specifications

115

Temperature, Resistance Temperature Detectors (cont.)

Type (α)Range °C Measure °C Source °C

1 Year 2 Year 1 Year 2 Year

1000Ω Pt(385) -200 to 0 0.3 0.5 0.1 0.2

0 to 400 0.5 0.8 0.2 0.4

400 to 630 0.8 1.0 0.4 0.5

10Ω Cu(427) -100 to 0 2 2 1 1

0 to 260 2 2 1 1

100Ω Pt(3916) -200 to -190 0.3 0.4 0.3 0.4

-190 to 0 0.3 0.4 0 .1 0.2

0 to 360 0.5 0.8 0.2 0.4

Sensor inaccuracies not included

Resolution: 0.1°C

Temperature Coefficient: 0.02°C/°C in the ranges -10 to 18°C and 28 to 50°C

Maximum Input Voltage: 30V

Maximum Input Current for RTD Source: 10Ω RTDs: 8 mA dc; 100 Ω − 120Ω RTDs: 3 mA dc;

200Ω − 1000Ω RTDs: 1 mA dc

For two and three-wire RTD measurements, add 0.4°C to the specifications.

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Loop Power Supply

Setting Models 741B and 743B

1 Year 2 Year

24 Volt 5% 5%

28 Volt 5% 5%

Short circuit protected

Maximum Current: 22 mA

Maximum Input Voltage: 30V dc

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117

Top and Bottom Limits of Ranges with Auto Range On

Range, dc V Measure Top of Range Bottom of Range

110 mV ±110.000 mV 0.000 mV

1.1V ±1.10000V ±0.10000V

11V ±11.0000V ±1.0000V

110V ±110.000V ±10.000V

300V ±300.00V ±100.00V

Range, dc V Source

110 mV +110.000 mV -10.000 mV

1.1V +1.10000V +0.10000V

11V +11.000V +1.1000V

Range, ohms Measure and Source

11Ω11.000Ω0.000Ω

110Ω110.00Ω10.00Ω

1.1 kΩ1100.0Ω100.0Ω

11 kΩ11.000 kΩ1.000 kΩ

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Top and Bottom Limits of Ranges with Auto Range On (cont.)

Range, Current Measure

22 mA +22.000 mA 0.000 mA

110 mA +110.00 mA +30.00 mA

Range, Current Source

22 mA +30.000 mA 0.000 mA

Range, Frequency Measure

100 Hz 109.99 Hz 1.00 Hz

1 kHz 1099.9 Hz 100.00 Hz

10 kHz 10.999 kHz 1.000 kHz

50 kHz 50.00 kHz 10.00 kHz

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119

General Specifications

Display: 240 by 200 pixel graphic LCD, 70 x 58 mm.

Power: Internal battery pack: NiCd, 7.2V, 1700 mAh.

Memory Backup: Lithium battery, 5 years typical lifetime.

Dimensions: 130 x 236 x 61 mm (5.1 x 9.3 x 2.4 in.).

Weight: 1.4 kg (3 lb. 1 oz.).

Altitude: Up to 2800 meters (9186 ft) above mean sea level.

Operating Temperature: -10 to 50°C (typically to -20°C, except for frequency measure and ac voltage

measure)

Storage Temperature: -20 to 60°C

Humidity: Avoid prolonged use outside the safe operating boundaries shown in the

graph on the next page.

Water/Dust Protection: Designed to meet IEC529 IP52 (normal operating vacuum used for dust

test.)

Safety: Designed in accordance with ANSI/ISA-S82 .01-1994, UL3111, CAN/CSA

C22.2 No. 1010.1-92, and EN610-10:1993. See “Safety Information” near

the front of this manual.

Warranty: See the WARRANTY, inside front cover.

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120

100

-20 0 20 40 60 80 100 120 140

Temperature (

%RH

-4

-20 030 40 50 60

= Normal Operation (-10

C — 50

C), humidity typical

= Storage (-20

C — 60

C)+

-10

gj37f.eps

Figure 37. LCD Operating Environment Specification

121
Index
W, 7, 12, 20, 36, 42
4 to 20 ma transmitter
simulating, 46
—A—
Accesso ries, 100
As found test data, 66
As left test data, 72
Auto
backlight timeout, 26
battery save timeout, 23
Auto step, 59
—B—
Backlight, 26
auto timeout, 26
Bail, 19
Bar code wand, 3, 80
Battery
auto save timeout, 23
charge life, 22
eliminator, 23
lithium backup, 97
replacement, 96
Battery, charging, 20
Battery, removing, 20

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122
—C—
Calculator, 85
Calibration, 98
data, 97
Cleaning
the calibrator, 97
Communicating with a PC (743 only), 96
Connections
for electrical measurement, 28
Continuity
testing, 30
trip detect during ramping, 60
Contrast
adjusting display, 24
Current
measuring, 28
sourcing, 44
Current shunt, 100
Customizing mV input units, 42
—D—
Damping measurements, 43
Date
display, activating, 24
format, 24
Displ ay, 17
Display language
selecting, 24
—F—
Frequency
measuring, 28
sourcing, 44
—J—
Jacks, 12
—K—
Key functions, 14
Keys, 14
—L—
Language
selecting, 24
Limit switch calibration, 74
Log softkey (743 only), 81
Logging data (743 only), 81
Loop power
providing, 48
simulating, 46

Index 
(continued)
123
—M—
Measure
mode, 28
Measure/source mode, 63
Measurement
damping, 43
Measuring
continuity, 30
current, 28
electrical parameters, 28
frequency, 28
pressure, 30
resistance, 28
temperature with thermocouples, 34
voltage, 28
Memory, 79
reviewing, 81
Min and Max measurement display, 84
—N—
Name field in setup, 26
—P—
Parts list, 99
Pressure
measuring, 30
sourcing, 50
Pressure modules available, 100
—R—
Ramping the output, 60
Repair, 98
Replacement parts, 99
Resistance
measuring, 28
sourcing, 44
Results
saving, 79
RTD
simulating, 54
types, 34
RTD (Resistance-temperature Detectors), 37
—S—
Saving r esults, 7 9
Scale
softkey for measure, 41
temperature, 34, 39
Scale softkey, 41
Servicing, 98

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124
Simulating, 53
loop power, 46
thermocouples, 53
Simultaneous measure/source, 63
Source
mode, 44
Source mode, 44
Sourcing
current, 44
electrical parameters, 44
frequency, 44
loop power, 48
pressure, 50
resistance, 44
thermocouples, 53
voltage, 44
Square root, delta-flow calibration, 41
Square-law transmitters, 57
Standard equipment, 4
Step size softkey, 58
Stepping the output, 58
Strap, 19
—T—
Task list (743 only), 84
Telephone number
parts, service, or assistance, 4
Temperature
Measuring with Thermocouple, 34
scale, 34, 39
Thermocouple
measuring, 34
measuring temperature with, 34
sourcing, 53
types, 34
Time
display, activating, 24
format, 24
Transmitter
4 to 20 mA, simulating, 46
Transmitter mode, 77
Trip detect during ramping, 60
Troubleshooting, 97
—U—
Units
custom, 42
temperature, 34
Uploading to a PC (743 only), 96
User value, 69
—V—
Voltage
measuring, 28
sourcing, 44
trip detect during ramping, 60

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