USER'S MANUAL
ACD-16 Pro
ACD-16 TRMS Pro
ACD-40PQ
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1) SAFETY
This manual contains information and warnings that must be followed for operating the
instrument safely and maintaining the instrument in a safe operating condition. If the
instrument is used in a manner not specified by the manufacturer, the protection provided by
the instrument may be impaired.
The meter meets the requirements for double insulation to IEC61010-2-032(1994),
EN61010-2-032(1995), UL3111-2-032(1999):
Category III 600 Volts ac and dc.
PER IEC61010 OVERVOLTAGE INSTALLATION CATEGORY
OVERVOLTAGE CATEGORY II
Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be
supplied from the fixed installation.
Note – Examples include household, office, and laboratory appliances.
OVERVOLTAGE CATEGORY III
Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations.
Note – Examples include switches in the fixed installation and some equipment for industrial
use with permanent connection to the fixed installation.
OVERVOLTAGE CATEGORY IV
Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation.
Note – Examples include electricity meters and primary over-current protection equipment.
TERMS IN THIS MANUAL
WARNING identifies conditions and actions that could result in serious injury or even death
to the user.
CAUTION identifies conditions and actions that could cause damage or malfunction in the
instrument.
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WARNING
To reduce the risk of fire or electric shock, do not expose this product to rain or moisture.
The meter is intended only for indoor use.
To avoid electrical shock hazard, observe the proper safety precautions when working with
voltages above 60 VDC or 30 VAC rms. These voltage levels pose a potential shock hazard
to the user.
Inspect test leads, connectors, and probes for damaged insulation or exposed metal before
using the instrument. If any defects are found, replace them immediately.
Do not touch test lead tips or the circuit being tested while power is applied to the circuit
being measured. To avoid accidentally short circuit of bare (uninsulated) hazardous live
conductors or busbars, switch them off before insertion and removal of the current clamp
jaws. Contact with the conductor could result in electric shock. Keep your hands/fingers
behind the hand/finger barriers that indicate the limits of safe access of the meter and the
test leads during measurement.
CAUTION
Disconnect the test leads from the test points before changing meter functions.
INTERNATIONAL ELECTRICAL SYMBOLS
! Caution ! Refer to the explanation in this Manual
Caution ! Risk of electric shock
Earth (Ground)
Double Insulation or Reinforced insulation
Fuse
AC--Alternating Current
DC--Direct Current
2) CENELEC Directives
The instruments conform to CENELEC Low-voltage directive 73/23/EEC and
Electromagnetic compatibility directive 89/336/EEC
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3) PRODUCT DESCRIPTION
This user's manual uses only representative model(s) for illustrations. Please refer
specification details for function availability to each model.
1) Transformer Clamp Jaws for AC
current magnetic field pick up
2) Jaw marking lines for ACA position
error indication
3) Hand/Finger Barrier to indicate the
limits of safe access to the jaws during
current measurements
4) Push-buttons for special functions &
features
5) Input Jack for all functions EXCEPT
non-invasive ACA current function
6) Common (Ground reference) Input
Jack for all functions EXCEPT
non-invasive ACA current function
7) Slide-switch Selector to turn the
power ON/OFF and Select a function
8) LCD display
9) Jaw trigger for opening the
transformer clamp jaws
10) Jaw center Indicators, at where
best ACA accuracy is specified
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4
) OPERATION
ACV & DCV functions
Set the slide-switch function-selector to the position. Default at last selected function.
Press SELECT button to toggle between ACV and DCV measurement functions. There is no
LCD annunciator for DC. LCD annunciator “ ” turns on to indicate AC is selected.
Line-level Frequency function
When voltage or current function is selected, press Hz button momentarily toggles to
Line-level Frequency function. Frequency trigger levels vary automatically with function
ranges.
T
HD%-R Total Harmonic Distortion - RMS function (ACD-40PQ only)
THD%-R = (Total Harmonics RMS / Total RMS) x 100%
Total Harmonic Distortion - RMS (THD%-R) is the percentage ratio of the Total Harmonics
RMS value to the Total (Overall) RMS value of a voltage or current signal, and is given by
the above expression. An ideal sinusoidal waveform has a value of 0 %. A badly distorted
sinusoidal waveform may have a much higher THD%-R value of approaching one hundred
(100% is the maximum theoretical reading).
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When voltage or current function is selected, press and hold THD%-R button for one
second or more toggles to Total Harmonic Distortion - RMS measurement function. The LCD
annunciator “%” turns on.
Note:
Specified accuracy at ACA fundamental > 5A; ACV fundamental > 50V.
The meter displays “---.- %” when ACA fundamental < 1A; ACV fundamental <8.5V
ACA Current clamp-on function
Set the slide-switch function-selector to the position. Inputs are made through the clamp
jaws for non-invasive ACA current measurements.
CAUTION
●For non-invasive ACA current measurements, press the jaw trigger and clamp the jaws
around only one single conductor of a circuit for load current measurement. Make sure the
jaws are completely closed, or else it will introduce measurement errors. Enclosing more
than one conductor of a circuit will result in differential current (like identifying leakage
current) measurement.
●Adjacent current-carrying devices such as transformers, motors and conductor wires will
affect measurement accuracy. Keep the jaws away from them as much as possible to
minimize influence.
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Temperature function
Set the slide-switch function-selector to the oC/oF position. Default at last selected
function. Press SELECT button to toggle between oC and oF measurement functions.
Be sure to insert the banana-plug type-K temperature bead probe TPK-59 at correct
polarities.
Ω/ functions
Set the slide-switch function-selector to the Ω/ function position. Default at last selected
function. Press SELECT button to toggle between Ω and measurement functions.
Hi-Lo Logging mode
Hi-Lo Logging is an innovative feature. It minimizes product cost for maximum monitoring
speed and period making field monitoring simpler and more affordable. Hi-Lo Logging
captures the most important surges (Hi) & sages (Lo) using one-minute intervals. That is, the
meter uses its highest update rate to compare and capture the highest and lowest readings
in every one-minute time interval. It can log up to 5400 pairs of Hi/Lo readings and thus 5400
minutes of total logging period.
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Press and hold the “Hi-Lo Log” button for one second or more to start “ ” a new Hi-Lo
Logging session. All previously logged data is erased! Annunciators “Max Min” flashes and
real-time measurement readings are being displayed. Press SELECT button momentarily
toggles to display logged data item number (number of one-minute time intervals). “ ”
displays in the secondary display.
Press the HOLD button momentarily to pause. The LCD annunciator “ ” flashes. Press the
HOLD button momentarily again to continue. Press and hold the “Hi-Lo Log” button for one
second or more again to stop “ ” and end the Hi-Lo Logging session. The meter can now
be switched off.
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To recall the data, switch on the meter, then press the forward “ ” and backward “ ”
arrow buttons at the same time to recall “ ” the logged data. The meter displays in turn the
absolute maximum item number, absolute maximum reading, absolute minimum item
number, and then absolute minimum reading (of the whole logging period).
Press the forward “ ” (or backward “ ”) arrow button momentarily to read the next
logged data item. The meter displays in turn the one-minute item interval number “ ” (the
count of one-minute time intervals), Hi-reading “ ” (the highest reading), and then
Lo-reading “ ” (the lowest reading) of that one-minute item interval. Press-and-hold the
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button can quickly scroll the logged items. The meter gives short beeps when the last (or
he first) item is reached. t
Note:
1. When the meter’s memory is full or the meter battery is low, the meter will stop (end) the
Hi-Lo logging session and go back to the normal measuring mode.
2. The data is stored to the non-volatile memory shortly after every one-minute item interval
to maximize data safety. However, the end-of-data sign can be stored only after the Hi-Lo
logging session is ended with a session stop “ ”. Therefore, always stop “ ” the Hi-Lo
logging properly before sliding the slide-switch function-selector to the next function position.
3. After the Hi-Lo logging session hais ended, you can switch off the meter for
transportation, storage, or even battery changing. The logged data can also be downloaded
to PC computers through the optional purchase RS232 KIT2 interface kit. Also see RS232C
C computer interface capabilities section. P
Auto feature
The Auto (Automatic-Hold) feature automatically captures and displays significant stable
readings. Press and hold the Auto button for one second or more to toggle to the Auto
ode. The LCD annunciators “Auto” & “ ” turn on.
m
WARNING
To avoid electric shock hazard, do not use the Auto (Automatic-Hold) mode to determine
if a circuit is live. Unstable readings will not be captured and displayed.
HOLD feature
The Hold feature freezes the display for later viewing. Press the HOLD button
momentarily to toggle to the Hold mode. The annunciator “ ” turns on.
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Display Backlight (model ACD-16 TRMS & ACD-40PQ only)
ress the SELECT button for 1 second or more to toggle the display backlight on and off. P
Auto Power Off (APO)
The meter turns off after approximately 16 minutes of neither switch nor button activity. To
wake up the meter from APO, slide the function-selector to other positions and back on
gain. Always turn the function-selector to OFF when the meter is not in use. a
Disabling Auto-Power-Off (APO)
Press-and-hold the HOLD button while sliding the function-selector to a (designated)
function-selector position. This disables the Auto-Power-Off feature of the functions on that
particular function-selector position. The LCD displays “ ” & “ ” to confirm activation
right after the HOLD button is released. Slide the function-selector to any other positions
fterwards resumes Auto-Power-Off feature. a
RS232C PC computer interface capabilities
The instrument is equipped with an optical isolated data output port at the bottom case
near the battery compartment. Optional purchase PC interface kit RS232 KIT2
(including Optical Adapter Back, RS232 Cable & Bs13x Software CD) is required to
connect the meter to PC computer thru RS232C protocol. The RS232C Data
Recording System software Bs13x includes a digital meter, an analog meter, a
comparator meter, and a Data Graphical recorder. Refer to the README file comes
ith the interface kit for further details. w
5) MAINTENANCE
WARNING
To avoid electrical shock, disconnect the meter from any circuit, remove the test leads from
the input jacks and turn OFF the meter before opening the case. Do not operate with open
ase. c
Trouble Shooting
If the instrument fails to operate, check batteries and test leads etc., and replace as
necessary. Double check operating procedure as described in this user’s manual
If the instrument voltage-resistance input terminal has subjected to high voltage transient
(caused by lightning or switching surge to the system) by accident or abnormal conditions of
operation, the series fusible resistors will be blown off (become high impedance) like fuses to
protect the user and the instrument. Most measuring functions through this terminal will then
be open circuit. The series fusible resistors and the spark gaps should then be replaced by
qualified technician. Refer to the LIMITED WARRANTY section for obtaining warranty or
repairing service.
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Cleaning and Storage
Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or
solvents. If the meter is not to be used for periods of longer than 60 days, remove the
atteries and store them separately b
Battery replacement
The meter uses standard 1.5V AAA Size (NEDA 24A or IEC LR03) battery X 2
Loosen the 2 captive screws from the battery cover case. Lift the battery cover case.
Replace the batteries. Replace battery cover case. Re-fasten the screws.
6) Specifications
General Specifications
Display :
Voltage functions: 6000 counts LCD display
Ohm & Hz functions: 9999 counts LCD display
ACA clamp-on function: 4000 counts LCD display
Update Rate :
Voltage, ACA clamp-on, Ohm & Temperature functions: 4 per second nominal
Hz function: 2 per second nominal
Polarity : Automatic
Low Battery : Below approx. 2.4V
Operating Temperature : 0oC to 40oC
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Relative Humidity : Maximum relative humidity 80% for temperature up to 31oC
decreasing linearly to 50% relative humidity at 40oC
Altitude : Operating below 2000m
Storage Temperature : -20oC to 60oC, < 80% R.H. (with battery removed)
Temperature Coefficient : nominal 0.15 x (specified accuracy)/ oC @(0oC -18oC or 28oC
-40oC), or otherwise specified
Sensing : Average sensing for model 131; True RMS sensing for model 132 & 135
Safety : Meets IEC61010-2-032(1994), EN61010-2-032(1995), UL3111-2-032(1999).
Measurement Category III 600 Volts ac & dc
Transient protection : 6.5kV (1.2/50µs surge) for all models
Pollution degree : 2
E.M.C. : Meets EN61326(1997, 1998/A1), EN61000-4-2(1995), and EN61000-4-3(1996)
In an RF field of 3V/m:
Total Accuracy = Specified Accuracy + 45 digits
Performance above 3V/m is not specified
Overload Protections :
ACA Clamp-on jaws : AC 1000A rms continuous
+ & COM terminals (all functions) : 600VDC/VAC rms
Power Supply : standard 1.5V AAA Size (NEDA 24A or IEC LR03) battery X 2
Power Consumption :
Voltage & ACA functions: 3.5mA typical
Ohm & Temperature functions: 4mA typical
APO Timing : Idle for 16 minutes
APO Consumption : 10µA typical
Dimension : L224mm X W78mm X H40mm
Weight : 224 gm approx
Jaw opening & Conductor diameter : 45mm max
Special features : THD%-R Total harmonic distortion-RMS (ACD-40PQ only); Display
Backlight ACD-16 TRMS & ACD-40PQ only); Auto-Hold; Display Hold; On screen
stand-alone Hi-Lo logging (5400 minutes) at sampling speed of faster than:
20 per second for Voltage & ACA functions
4 per second for Ohm & Temperature functions
2 per second for Hz function
Accessories : Test leads (MTL-90B), batteries installed, user's manual, TPK-59 banana
plug type-K thermocouple & soft carrying pouch
O
ptional accessories : RS-232 KIT2 interface kit.
Electrical Specifications
Accuracy is ±(% reading digits + number of digits) or otherwise specified, at 23 oC ±5 oC &
less than 75% R.H.
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True RMS Models ACD-16TRMS & ACD-40PQ ACV & ACA clamp-on accuracies are
specified from 5% to 100% of range or otherwise specified. Maximum Crest Factor are as
specified below, and with frequency spectrums, besides fundamentals, fall within the meter
specified AC bandwidth for non-sinusoidal waveforms. Fundamentals are specified at 50Hz
and 60Hz.
AC Voltage
RANGE Accuracy
50Hz / 60Hz
600.0V 1.0% + 5d
45Hz ~ 500Hz
600.0V 1.5% + 5d
500Hz ~ 3.1kHz (model 132 & 135 only)
600.0V 2.5% + 5d
CMRR : >60dB @ DC to 60Hz, Rs=1kΩ
Input Impedance: 2MΩ, 30pF nominal
True RMS models Crest Factor:
< 2.3 : 1 at full scale & < 4.6 : 1 at half scale
DC Voltage
RANGE Accuracy
600.0V 0.5% + 5d
NMRR : >50dB @ 50/60Hz
CMRR : >120dB @ DC, 50/60Hz, Rs=1kΩ
Input Impedance: 2MΩ, 30pF nominal
THD%-R 1) (model 135 only)
RANGE Harmonic order Accuracy 2)
Fundamental 1.5% of Reading + 6d
2nd ~ 3rd 5.0% of Reading + 6d
4th ~ 10th 2.5% of Reading + 6d
0.0% ~99.9%
11th ~ 51st 2.0% of Reading + 6d
1)THD-R is defined as: (Total Harmonic RMS / Total RMS) x 100%
2)Specified accuracy @ ACA fundamental > 5A ; ACV fundamental > 50V
Ohms
RANGE Accuracy
999.9Ω 1.0% + 6d
Open Circuit Voltage : 0.4VDC typical
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Audible Continuity Tester
Audible threshold: between 10Ω and 300Ω.
Response time: 250µs
Frequency
Range Accuracy
5.00Hz ~ 500.0Hz 0.5%+4d
Sensitivity (Sine RMS)
40A range: > 4A
400A range: > 40A
1000A range: > 400A
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00V range: > 30V
Temperature
RANGE Accuracy 1)
-50oC ~ 300oC 2.0% + 3oC
-58oF ~ 572oF 2.0% + 6oF
1)Add 3oC (or 6oF) to specified accuracy @ -20oC ~ -50oC (or @ -4oF ~ -58oF)
T
ype-K thermocouple range & accuracy not included
ACA Current (Clamp-on)
RANGE Accuracy
1) 2) 3)
50Hz / 60Hz
40.00A, 400.0A, 1000A 1.0% + 5d
45Hz ~500Hz
40.00A, 400.0A 2.0% + 5d
1000A 2.5% + 5d
500Hz ~ 3.1kHz (ACD-16TRMS Pro & ACD-40PQ only)
40.00A, 400.0A 2.0% + 5d
1000A 2.5% + 5d
True RMS models Crest Factor:
< 2.5 : 1 at full scale & < 5.0 : 1 at half scale for 40.00A & 400.0A ranges
< 1.4 : 1 at full scale & < 2.8 : 1 at half scale for 1000A range
1)Add 8d to specified accuracy while reading is below 10% of range
2)Induced error from adjacent current-carrying conductor: < 0.06A/A
3)Specified accuracy is for measurements made at the jaw center. When the conductor is not
positioned at the jaw center, position errors introduced are:
Add 1% to specified accuracy for measurements made WITHIN jaw marking lines (away
from jaw opening)
Add 4% to specified accuracy for measurements made BEYOND jaw marking lines (toward
jaws opening)
LIMITED WARRANTY
Congratulations! Your new instrument has been quality crafted according to
quality standards and contains quality components and workmanship. It has
been inspected for proper operation of all of its functions and tested by
qualified factory technicians according to the long-established standards of our
company. Your instrument has a limited warranty against defective materials
and/or workmanship for one year from the date of purchase provided that, in
the opinion of the factory, the instrument has not been tampered with or taken
apart. Should your instrument fail due to defective materials, and/or
workmanship during this one year period, a no charge repair or replacement
will be made to the original purchaser. Please have your dated bill of sale,
which must identify the instrument model number and serial number and call
the number listed below:
Repair Department
ATP – Amprobe
Phone: 954-499-5400
Toll Free: 800-327-5060
Fax: 866-287-7222
Website: www.Amprobe.com
Please obtain an RMA number before returning product for repair. Outside
the U.S.A. the local representative will assist you. Above limited warranty
covers repair and replacement of instrument only and no other obligation is
stated or implied.
www.Amprobe.com
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