WSMONITOR2 3M, WSMONITOR2 Datasheet - Page 2

• Manufacturer Part Number: WSMONITOR2
• Description: MONITOR WRIST STRAP/MAT
• Manufacturer: 3M
• Type: Monitorr

Specifications of WSMONITOR2

• Power Supply Type: AC Adapter
• Color: Black
• Size: 1 in x 2.4 in x 2.3 in
• Description/function: Monitors one wrist strap per person with the bench mat
• Product: Static Monitors
• For Use With/related Products: Wrist Strap & Table Mat
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 51111764718; 80000954570

single wire constant wrist strap monitors
Constant Monitors
product
Introduction
Damage to electronic devices is primarily caused by static electricity from people.
Connecting people to ground directs static electricity away from devices. Constant
monitors are designed to continuously test the connection of the person, the wrist
band, and the coil cord to ensure that people remain grounded.
Constant monitor WSMONITOR1 uses a solid state impedance design to continu-
ously test the connection integrity of the entire ground loop including the person, the
wrist band, and the coil cord. Models WSMONITOR2 and WSMONITOR3 also pro-
vide bench mat monitoring. 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. The unit is powered and grounded by the AC
adapter.
Monitors Reduce Cost
Constant monitors reduce production costs by eliminating the time associates spend
testing wrist straps before each shift. With a constant monitor, associates may begin
work by simply plugging in their wrist strap. Further savings may be realized by
reduced ESD damage from broken wrist straps. Constant monitors indicate a failed
wrist strap when the wrist strap breaks. A broken wrist strap may expose products to
ESD over an entire shift if it is checked only at shift change with wrist strap checker.
Cost Savings Model:
240 days per year
This is a conservative estimate of the cost savings. Many people use the trip to the
checker as an opportunity to socialize, increasing times to 6 or even 9 minutes. This
exercise assumes a single shift, with a once daily test. Many companies test at the
beginning of each shift, tripling the labor required.
Savings Per Monitor = Time to check wrist strap X Labor rate ($ per Hour /60) X
The WSMONITOR1 pays for itself in 100 days.
$153.6 = 4 minutes X $0.16 ($10 hour/60min) X 240
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item number
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single wire
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1142-
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Technology
Single Wire - Constant Monitors
A low level AC signal is used to constantly look for a broken or disconnected wrist
strap. 3M “Single Wire” or “impedance type” monitors use the phase difference
between current and voltage to detect changes in impedance of the cord, band and
person. A special buffering circuit design prevents false alarms from bunched cords
and changing capacitance. Any standard wristband and coiled cord can be used. No
adjustments are required.
Dual Wire - Continuous Monitors
These units provide continuous monitoring instead of constant monitoring. To avoid
skin irritation from the constant application of DC voltage, the sensing signal is pulsed,
on for one second and then off for two seconds. “Dual Wire” or “resistance type”
monitors apply as much as 16 volts DC to the operator through a special wristband
and coiled cord to look for a broken or disconnected wrist strap.
Cost of Ownership
Cost of installation and ownership for Dual Wire units is higher than Single Wire units,
with a Dual Wire monitor costing as much as $167 and the special wrist straps $33
each. By comparison, a Single Wire monitor costs about $60 with standard wrist
straps costing $8.
Calibration / Verification
Both single wire impedance type and dual wire resistance type monitors are designed
to be adjustment free. Annual calibration is not necessary. If, however, your quality
program requires testing, a verification tool that simulates a functional and non-func-
tional wrist strap is available to verify that the monitor is functional. See s on page 3.
h
3M Electronic Solutions Division
6801 River Place Blvd.
Austin, TX 78726-9000
US and Canada: 866-722-3736
Fax: [phone]
Intl: 919-718-0000; Fax: [phone]
email: [e-mail]; www.3M.com/static
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3M is a trademark of 3M Company.
All other trademarks herein are the property
of their respective owners.
Page 1. Constant Monitors- single wire.
Page 2. Application, Technology, Savings.
Page 3. Item Numbers, Specs, Test Module.
© 2008
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