3m-mediawebserver.pdf - 第27页

22 W orkstation Products For more pr oduct information, please visit www .3M.com/static 3M ™ Wrist Strap Monitor The 3M Static Monitor 790 is a cost-efficient unit that is small, compact and versatile in its usage, and m…

Workstation Products

Monitor Veriﬁcation Kits and Dual Conductor Portable Wrist Strap Monitor

™

Dual Conductor Portable Wrist

Strap Monitor

The 3M

™

Wrist Strap Monitor 725 is a small, compact, battery-powered

unit that continuously monitors both the worker and the worker’s wrist

strap. The monitor uses a reliable resistance method that includes the

worker’s skin resistance to determine if the system is operating properly.

The monitor uses the same dual conductor wrist strap as used with the

™

Workstation Monitor 724. In addition, the Monitor 725 also monitors

the ground wire connection and battery level.

The Wrist Strap Monitor 725 immediately alerts the individual when

a wrist strap is operating improperly. The Monitor 725 continuously

supplies a current that is returned through a wrist band and cord that

contain two separate independent conductors.

The monitor is a compact, portable, battery-powered unit with a visual

and an audible alarm. A “parking plate” mounted on the Monitor 725

allows an individual to disconnect the ground cord and clip it to the

parking plate to silence the alarm when moving from one work area to

another. The 3M

™

Belt Clip 723 is available as an accessory item and

may be purchased separately.

The competitively priced Wrist Strap Monitor 725 can be used in

manufacturing and field service environments. By contributing to the

protection of static sensitive devices and printed circuit boards from

static damage, the monitor helps save money and time as a result of

improved yield rates and lower field service costs.

Note: Only use 3M

™

Dual Conductor Bands and Cords with

the Monitor 725. See page 8 for additional information on wrist

band and cord combinations.

™

Wrist Strap Monitor 725

Veriﬁcation Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .pg. 20

™

Belt Clip 723

725 Properties

Item Typical Properties

Dimensions

2.5 H x 2.6 W x 1.1 in. D

(6.4 x 6.6 x 2.8 cm)

Power Supply

9 V alkaline battery (not supplied)

Test Voltage

9 Vdc maximum

Test Current

Less than 1 microamp

Upper Resistance Limits

Wrist Strap: 35 megohm

Ground Clip: 10 megohm

Lower Resistance

Wrist Strap: 1.5 megohm

Worksurface: none

Accuracy

± 15%

Environmental Operating Conditions

Temperature

Max. 110°F (43°C), Min. 50°F (10°C)

Humidity

Max. 75% R.H.

Accessories

Belt Clip 723

Product No. Description

725

Personal and Portable Wrist Strap Monitor for use in

manufacturing and ﬁeld service environments. The Monitor

725 features wrist strap monitoring and grounding for

ESD mats/work surfaces. Accessory Belt Clip 723

converts the monitor into a portable/personal monitor.

723

Accessories:

Belt Clip 723

2.5 H x 2.625 W x 1.125 in. D

(6.4 x 6.7 x 2.9 cm)

Workstation Products

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

™

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.

™

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

™

Dual Lock

™

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)

™

Continuous Monitor, Single Wire 1

™

Continuous Monitor, Single Wire 2

™

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