Credence Technologies CTE701A User Guide

Procedure

q Follow instructions in
q Connect 3.5mm test cable to both the Checker and to Operator jack of

your monitor.
q Depress and keep pressed the “Wriststrap” button. Your monitor should

indicate good connection.
q While keeping Pass button, depress and keep pressed Body Voltage

“High” button.
q Your monitor should provide indication of excessive body voltage in

each polarity -- positive and negative. If you ordered Checker for WS Aware
with a single terminal for both operators (model CTC061-D), please see
special addendum. When Body Voltage Low button is depressed, no Body
Voltage indication should be present in the monitor.

BasicsBasics

Basics section

BasicsBasics

Workstation
Monitor
Checker

Model CTE701A

Limited Warranty

Credence Technologies, Inc. warrants Worskstation Monitor Checker to be free from defects in materials and
workmanship under normal use and service for a period of one (1) year from date of purchase directly from
Credence Technologies, Inc., or from its authorized distributors. This warranty extends only to the original
purchaser. This warranty shall not apply to any product or part of it which has been subjected to misuse,
neglect, accident or abnormal conditions of operation. Except to the extent precluded by applicable state
law, Credence Technologies will have no liability for any consequential, incidental, or special damages.

In the event of failure of a product covered by this warranty, Credence Technologies, Inc. will repair a
product returned to authorized distributor or, only if it was purchased directly from Credence Technologies,
Inc., to the manufacturer; provided the warrantorís examination discloses to the company’s satisfaction
that the product was defective and is qualified for to a warranty claim. Credence Technologies may, at its
option, replace the product or its components with new or factory-refurbished parts or as whole in lieu of
repair. With regard to a product returned within one year of its purchase, said repair or replacement will
be made without charge. If the failure has been caused by misuse, neglect, accident or abnormal
conditions of operation, repairs will be billed at a nominal cost. Warranty does not cover transportation
costs.

Credence Technologies, Inc.

© 2006 Credence Technologies, Inc.
Ground Masteris registered trademark

of Credence Technologies, Inc.
Patent Pending. Made in U.S.A.

3601-A Caldwell Dr.
Soquel, CA 95073 U.S.A.
Tel. [phone] FAX [phone]

www.credencetech.com

PUB01907

User’s Guide

Credence Technologies, Inc.

Thank you for purchasing Workstation Monitor Checker. With it, you will always
know whether your workstation monitors and ground monitors operate within
your specification parameters.

Workstation Monitor Checker model CTE701 is designed to verify proper opera­tion of your dual wriststrap monitors, workstation monitors and ground monitors.
Checker simulates proper resistances and signals so that you can see whether the
response of your monitors complies with your specification.

Though the Checker has been designed to work mostly with Credence Technolo­gies’ monitors, such as WS Aware®, Ground Master®, Iron Man Plus, Ground
Man and Ground Man Plus, it is also able to verify the performance of most
workstation and ground monitors on the market.

Checker presents certain loads and signals to the monitor that simulate specific
parameters of ground connections and wriststraps. Please note that not all
monitors have the same features.

What is included

Each workstation monitor Checker includes:
Workstation Monitor Checker model CTA701A 1ea.
9V Alkaline Battery 1ea.

Battery comes already installed in the Checker.
Ground Cable (banana to alligator clip) 1ea.
Ground Monitor Cable (banana to pin) 1ea.

3.5mm Male-to Male cable 1ea.
This User’s Guide 1ea.

Wriststraps

The Checker verifies proper operation of monitors of dual wriststraps, i.e. the
wriststraps that use two connections to an operator.

Setup

The Checker applies resistance of a certain value across the wriststrap terminal
input in order to simulate a wriststrap. In critical environments where the wriststrap
monitor is used the electrical resistance of an operator is specified to be 10MOhms
max. A good quality dual wriststrap has a1MOhm resistor in each half. It is up to
the user whether to account for these resistors or not. In case you account for these
resistors, then your limit would be:

10MOhms +1 MOhm + 1MOhm = 12 MOhms.
Limit is set by dip switch #

Resistance, MOhmsResistance, MOhms

Resistance, MOhms

Resistance, MOhmsResistance, MOhms

12 0
10 1

Checker by default provides selected resistance plus 1MOhm, i.e. for 12MOhms
limit, it would provide 13MOhms, for 10MOhms limit it would provide 11MOhms.
When the Pass button is pressed, the Checker provides resistance 1MOhm less
than the limit, i.e. 11 and 9 MOhms accordingly.

Procedure

q Follow instructions in
q Connect 3.5mm test cable to both the Checker and to Operator jack of

your monitor. At this point the monitor should indicate failure.
q Depress the “Wriststrap” button. Your monitor should indicate good

connection.

Body Voltage

Quality wriststrap monitors can detect excessive voltage that an operator may
develop as a result of movement-caused tribocharge and touching energized ob­jects. To test this ability of the monitor, first set the body voltage threshold by
depressing the Body Voltage button and turning the blue potentiometer while mea­suring the voltage on the tip of the 3.5mm plug vs. ground. Red and green LEDs
alternatively blink indicating positive and negative voltage applied automatically.
Your wriststrap monitor must react to both polarities of excessive voltage on the
operator.

Keep in mind that the voltage applied directly to the terminal of the monitor is 1/2
of the voltage on the operator due to 1M resistors in the wriststrap. Set Body
Voltage on the Checker slightly higher than your monitor is calibrated for. For
example, if your monitor is calibrated to 2.5V body voltage, depress Wriststrap
and Body Voltage High buttons simultaneosly and set your Checker to 1.35V
which is slightly higher than 1/2 of 2.5V. Your Checker can be set up to 5V.

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BasicsBasics

Basics section

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