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23 W orkstation Products W rist Strap Monitor and Single Wire Constant Monitors Single Wire Continuous Monitors Single wire continuous monitors offer the most cost-effective means for continuously testing the connection …

Workstation Products

For more product information, please visit www.3M.com/static

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Wrist Strap Monitor

The 3M Static Monitor 790 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.

Housed in static dissipative plastic, the Static Monitor 790 works by

measuring the voltage potential on a person referenced to earth ground.

The monitor uses a slide switch allowing the user to select the voltage

level necessary for the specific job function being performed.

The Static Monitor 790 has two wrist strap input jacks located on its

front, allowing two operators to use one monitor unit at a workstation

simultaneously. Power is supplied to the unit through an AC adapter.

Three distinct alarms make it easy to identify operators 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 unit’s ground and chassis

cords provide a permanent connection.

Features

• Audible and visual alarms.

• Compact system.

• Select voltage alarm levels of 1 V, 3 V, 6 V and 9 V.

• Static dissipative plastic housing.

• Mounts easily to ESD worksurface.

• Regulatory Compliance: UL and CE.

• VM fabric and metal bands are to be used specifically with the

Static Monitor 790.

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Static Monitor 790

790 Properties

Item Typical Properties

Monitor Size

3.5 H x 4.0 W x 1.25 in. D

(8.9 x 10.2 x 3.2 cm),

approximate H x W x D

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

5.5 x 2.1 x 9.5 mm (OD x ID x l)

Accuracy

(The following parameters are valid for

altitudes up to 2000 m. Pollution degree

2, Class 3, Equipment)

Voltage Detection Levels

(1 V ±15%) (3 V, 6 V, & 9 V ±10%)

Ground Disconnect

10 ohm ±20%

Environmental Operating Conditions

Temperature

Max. 104°F (40°C); Min. 50°F (10°C)

Humidity

Max. 75% relative humidity

Product No. Description

790

Monitor includes:

• 790 Wrist Strap Monitor

• 790AC Adapter (available without AC Adapter)

• 3M

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Dual Lock

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Mounting Fasteners

• 2-Wire Connector

Product No. Description

790MP

Mounting Plate for 790 (10 per package)

790VK

Veriﬁcation Kit

3057

Stand-By Jack

Dual Conductor Bands and Cords

(See page 8 for additional information on wrist band

and cord combinations.)

Workstation Products

Wrist Strap Monitor and Single Wire Constant Monitors

Single Wire Continuous Monitors

Single wire continuous monitors offer the most cost-effective means

for continuously testing the connection integrity of the entire ground

loop including the person, the wrist band and the coil cord. By using

new impedance sensing technology, adjustments and false alarms

are virtually eliminated. This system is fully automatic and activates

when a wrist strap is plugged into the unit. It provides a green light

for safe condition and a red light and tone for unsafe condition. Units

are powered and grounded by an AC adapter. Compatible with most

standard wrist straps.

Continuous monitors reduce production costs by virtually eliminating the

time spent testing wrist straps. Further savings may be realized by reduced

ESD damage from broken wrist straps. Continuous monitors indicate a

failed wrist strap when the wrist strap breaks. A broken wrist strap that

goes undetected may expose products to ESD over an entire shift.

WSMONITOR1 Features

• Monitors one wrist strap/person.

• Compatible with any standard wrist strap.

• Easy to use: Simply plug in the wrist strap.

• Easy to install: Attach the monitor to the bench with included

hardware and plug it in.

• Size: 0.88 H x 1.75 W x 1.25 in. D (2.24 x 4.45 x 3.18 cm)

WSMONITOR2 Features

• Monitors one wrist strap/person and the mat.

• Compatible with any standard wrist strap.

• Easy to use: Simply plug in the wrist strap.

• Easy to install: Attach the monitor to the bench with included

hardware, connect the mat and plug it in.

• Size: 1 H x 2.4 W x 2.3 in. D (2.54 x 6.10 x 5.84 cm)

WSMONITOR3 Features

• Monitors two wrist straps/persons (for supervisor or second operator).

• Monitors connections to the bench mat.

• Compatible with any standard wrist strap.

• Easy to use: Simply plug in the wrist strap.

• Easy to install: Attach the monitor boxes to the bench with included

hardware, connect the mat and plug it in.

• Size: 1 H x 4 W x 2.4 in D (2.54 x 10.16 x 6.10 cm)

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Continuous Monitor, Single Wire 1

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Continuous Monitor, Single Wire 2

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Continuous Monitor, Single Wire 3

Product No. Description

WSMONITOR1

Monitors one wrist strap

WSMONITOR2

Monitors one wrist strap and bench

WSMONITOR3

Monitors two wrist straps and bench

Workstation Products

For more product information, please visit www.3M.com/static

™

Ground Monitors Product Selection Guide

Ground Master CTC065 Ground Man CTC333 Ground Man Plus CTC334

Metal Grounds

8 3 3

Measurement Method

AC Impedance

x x x

EMI on Metal Grounds

x - -

Wrist Strap Monitoring

Output Signal

Analog 4 – 20mA

Logic

x x x

Digital

MODBUS

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Ground Master Equipment

Ground Monitors

3M Ground Master Equipment Ground Monitors are designed to provide

continuous monitoring of proper ground connections of up to eight tools

and up to 16 tools in tandem with another Ground Master monitor. The

monitor shows which individual ground connection is being monitored

and its status. Ground Master also monitors EMI on each ground, to

assist in diagnostics of lockups and malfunctions.

Each ground connection has its own easily replaceable fuse to prevent

dangerous voltages from incorrect wiring propagating to other equipment.

Ground Master provides intelligent information to a facility monitoring

system with detailed status on each ground connection. 3M

Ground

Master RT provides relay closure and a logic signal to the tool so that

it can be shut down in case of ground failure. Contact 3M for the best

model for your applications.

Features

• ANSI/ESDA S20.20 compliant.

• Alarm threshold adjustable from 1–20 ohm.

• Each ground connection is protected by individual fuse in case of

incorrect wiring.

• EMI monitored on each ground.

• Output to data acquisition or facility monitoring system (depending

on model).

• Logic signal output to the tool shuts tool down if ground fails

(depending on model).

Product No. Description

CTC065

Ground Monitor

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Ground Master Equipment Ground Monitor