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5
1.0 Overview
1.1 Product Outline
To reduce the risks associated with an explosion hazard, which, if not avoided, could result in death or
serious injury:
• Do not use in an explosive environment. 3M
™
Shoes and Wrist Strap Tester 747 is not designed to be
intrinsically safe.
To reduce the risks associated with a medical device malfunction, which, if not avoided, could result in
death or serious injury:
• Persons with heart pacemaker devices should never use this Shoes and Wrist Strap Tester 747.
WARNING
The 3M
™
Shoes and Wrist Strap Tester 747 features:
(1) Evaluation of Electrostate Protection Provided by ESD Shoes and Wrist Straps
A single device measures the electrical resistance of a body while wearing ESD
shoes and wrist straps.
(2) Quick Measurements
Displays measures value and test results, and makes the results available for
output within one second after starting measurement.
(3) Power Saver Function
Conservers power by automatically turning off (or entering stand-by state
during AC operation) ten second after completing a measurement.
(4) Test Result Display and Output
Displays OK, HIGH, or LOW test results on panel LEDs. Testing threshold
resistance values are set by simple switch selections. Results are also available
at an open-collector output terminal. Refer to Section 4.1, “Open Collector
Output.”
(5) RS-232C Interface
Test results are available to an external PC through a serial (RS-232C) interface.
Refer to section 4.2, “RS-232C Communications.”