790 CABLE TIE & BASE ASSEMBLY - 3M

790 Static Monitor

In our ever-changing high tech world, a company’s

reputation for providing dependable products of excellent

quality is the one constant. Attention to ﬁne detail is the key

to ensuring that a high tech company here today will be

enjoying the rewards of tomorrow. Among the many details

of meeting these demanding speciﬁcations is the control of

electrostatic discharge (ESD).

The High Cost of Static Discharge

Static is generated all around us through simple movements,

such as walking from one workstation to another, or pulling

tape from a dispenser. A static charge builds up, causing a

discharge, often called a static shock. Even a small

discharge can measure several hundred volts and damage

microelectronic components, which can cause these

components to fail when installed in computers, cell phones

and other devices. Semi-conductor devices damaged by

static electricity can impact yield rates and product

reliability if not properly handled. However, more costly

than the damaged goods a company distributes is the

damaged reputation it suffers with its customer base. The

fact is most ESD damage can be prevented through a static

control program which emphasizes constant monitoring to

assure peak performance. To help achieve that goal of

constant vigilance, 3M is pleased to announce the

development of the 3M™Model 790 Static Monitor.

Cost-effective Static Monitor

3M recognizes that while high tech companies have to act

quickly and wisely in their endeavor to establish a plan for

constant monitoring, they must do so with an eye toward the

bottom line. The 790 Monitor is a cost efﬁcient unit that is

small, compact and versatile in its usage, and may be

mounted directly onto device handling equipment, testers,

and auto insertion equipment. An operator simply inserts a

dual conductor ground cord into one of the input jacks

located on the monitor while working on an integrated

circuit device handler. The 790 may also be mounted at

individual workstations, and at auto insertion equipment

used in contract manufacturing facilities.

Housed in static dissipative plastic, the 790 works by

measuring the voltage potential on a person referenced to

earth ground. The 790 uses a slide switch allowing the user

to select the voltage level necessary for the speciﬁc job

function being performed. For example, the 1V and 3V

levels are used for highly critical applications in disk dri ve

and wafer fabrication manufacturing, while the 6V and 9V

levels can be used for less sensitive work areas such as PCB

assembly. Included with the 790 is a mounting plate that

allows it to be permanently mounted at an ESD workstation

or directly to a device handler, tester, or auto insertion

equipment. Power is supplied to the 790 through an AC

adapter.

The 790 has two wrist strap input jacks located on its

front, which allows two operators to use one 790 monitor

unit at a workstation simultaneously. A green light indicates

that the unit is “on” and that all monitored connections are

within set limits. Two red lights and an audible alarm ﬂash

and beep at different rates to indicate 3 separate alarm

conditions:

• Exceeding voltage level set limit

• Loss of contact between arm and wristband

• 790 disconnected from ground

These distinct alarms make it easy to identify which

operator and the type of fault condition. The audible alarm

can be adjusted to a low or high level to overcome

background noise from other equipment that may be in use

in the area. Ring terminals on the end of the 790’s ground

and chassis cords provide a permanent connection.

Product Features

• Audible and visible alarms

• Compact system

• Pre-select test voltages 1V, 3V, 6V, & 9V

• Static-dissipative plastic housing

• Mounts easily to ESD worksurface

• Regulatory Compliance: UL & CE

The 3M 790 Static Monitor system includes a mounting

plate with adhesive, an AC adapter, and two ground cords

with a two-wire connector.

Litho in USA.

40% Pre-consumer waste paper

10% Post-consumer waste paper

Model No. Description Size

2368VM Dual Conductor Fabric Wrist Band Adjustable

2381VM Dual Conductor Metal Wrist Strap* Small

2382 VM Dual Conductor Metal Wrist Strap* Medium

2383 VM Dual Conductor Metal Wrist Strap* Large

2384VM Dual Conductor Metal Wrist Band Small

2385VM Dual Conductor Metal Wrist Band Medium

2386VM Dual Conductor Metal Wrist Band Large

2360 Dual Conductor Coil Cord 5 ft.

2370 Dual Conductor Coil Cord 10 ft.

2371 Dual Conductor Coil Cord 20 ft.

3057 Stand-By Jack ————

*Includes Band & Cord

Quality in Action

ISO requirements state the need for veriﬁcation of performance

of all test equipment. A 3M™790VK Veriﬁcation Kit allo ws

you to meet these requirements. The kit includes hardw are

items for connection to the 790 Monitor.

790 Properties

Item Typical Properties

Monitor Size 3.5" x 4.0" x 1.25" (88,9mm x 101,6mm x 31,8mm), approximate

Power Supply Requirements:

Input 120 Vac ±10% (North America)

Outside North America (As required)

Output 25 Vdc @ 50 mA rated load

Output Plug Polarization Center negative

Output Plug Dimensions 5,5mm O.D. x 2,1mm I.D. x 9,5mm length

Accuracy: (The following parameters are valid for altitudes up to 2000 m. Pollution degree 2, Class 3, Equipment)

Voltage Detection Levels (1V ±15%) (3V,6V, & 9V ±10%)

Ground Disconnect 10 ohms ±20%

Environmental Operating Conditions:

Temperature Maximum 104°F (40°C); minimum 50°F (10°C)

Humidity Maximum 75% relative humidity

Ordering Information:

For ordering information, technical information and

product information, you can reach us at:

Phone: 1-800-328-1368

Fax: 1-800-828-9329

Electronic Handling & Protection Division

6801 River Place Blvd.

Austin, TX 78726-9000

http://www.3M.com/ehpd

Important Notice

All statements, technical information, and recommendations related

to 3M’s products are based on information believed to be reliable,

but the accuracy or completeness is not guaranteed. Before using

this product, you must evaluate it and determine if it is suitable for

your intended application. You assume all risks and liability

associated with such use. Any statements related to the product

which are not contained in 3M’s current publications, or any

contrary statements contained on your purchase order shall have

no force or effect unless expressly agreed upon, in writing, by an

authorized ofﬁcer of 3M.

Warranty; Limited Remedy; Limited Liability.

This product will be free from defects in material and manufacture

for a period of 1 year from the date of purchase. 3M MAKES NO

OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY

IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR

A PARTICULAR PURPOSE. If this product is defective within the

warranty period stated above, your exclusive remedy shall be, at

3M’s option, to replace or repair the 3M product or refund the

purchase price of the 3M product. Except where prohibited by

law, 3M will not be liable for any loss or damage arising from

this 3M product, whether direct, indirect, special, incidental or

consequential regardless of the legal theory asserted.

3MTM 790 Static Monitor

Required accessories and optional parts for 3M 790 Static Monitor