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The TREK Model 920 simultaneously tests an operator's wrist strap and footwear
Test voltage：30V
standard：ANSI/ESD 20.20
Wrist Strap: 750KΩ~35MΩ
Footwear:100KΩ~1GΩ
Accuracy：±5% for < 1 megohm range
±10% for > 1 megohm range
