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Problem Items to check
Measurement does not start
when pressing the touch panel
Are the batteries depleted?
Is the AC adapter connected? (Sec. 2.3.2)
Is the power switch on? (Sec. 2.4)
Abnormal measurement values
Is the shoe testing plate connected? (Sec. 2.1)
Abnormal test results Are the threshold resistance switch selections correct? (Sec. 2.2)
Test results not available at
OUTPUT terminal
Is the SIGNAL OUT switch selection correct? (Sec. 4.1)
RS-232C communication
inoperable
Is the 3M
™
Shoes and Wrist Strap Tester 747 running on the AC adapter?
(Sec. 2.3.2)
Are the serial communications settings correct? (Sec. 4.2)
Is a crossed cable being used for the connection? (Sec. 4.2)
6.4 Cleaning
Gently wipe dirt from the surface of the unit with a soft cloth moistened with a
small amount of water or mild detergent.
7.0 Operational Verification Test
Testing Considerations
• This test procedure is used to verify that the 3M
™
Shoes and Wrist Strap
Tester 747 functions within the specifications as stated in Chapter 5 of this
instruction manual. It is recommended that you become familiar with the
operation of the Shoes and Wrist Strap Tester 747 outlined in this manual,
before beginning testing.
• It is recommended that this procedure be performed annually, However, if the
unit is exposed to a harsh environment or has been abused in some manner, it
may require performing this test procedure more frequently.
To reduce the risks associated with hazardous voltage, which, if not avoided, may result in minor or
moderate injury and/or property damage:
• Not intended to be serviced by the user. No user serviceable parts.
To reduce the risks associated with electrostatic discharge (ESD), which, if not avoided, may result in
property damage to electronic components or assemblies being handled:
• Perform operational verification test to ensure proper operations of the 3M
™
Shoes and Wrist Strap
tester 747 as required.
CAUTION