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3
SAFETY INFORMATION
Read, understand and follow all safety information before operating this
equipment. Retain this User’s Guide for future reference.
Intended Use:
The 3M
™
Shoes and Wrist Strap Tester 747 is a single-unit instrument designed
especially to measure electrical resistance for evaluating the effectiveness
of ESD (electrostatic discharge) shoes and wrist straps used to protect static
sensitive devices during handling.
Explanation of Safety Label Signal Words & Symbols
Warning
Indicates a potentially hazardous situation, which, if not avoided, may result in death or
serious injury.
Caution
Indicates a potentially hazardous situation, which, if not avoided, may result in minor or
moderate injury and/or property damage.
CAUTION: read operating instructions
WARNING: read operating instructions
Indicates the ON side of the power switch.
Indicates the OFF side of the power switch.
Indicates DC (Direct Current).
Power input connector polarity (center positive)
See user instruction manual for explanation of indicator lamps