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The 3M™ 746 Wrist Strap Tester operates as a battery powered tester, or additionally with an AC power supply as backup for the battery. It is designed to be used either as a stationary or portable piece of equipment. The tester has a permanent, internally set resistance range which extends from 750 k-ohm to 10 M-ohm. When tested, if the wrist strap is within this resistance range, the green LED will illuminate. The red LED indicates that the resistance to ground of the tested device or system is out of range. Specifications. Tolerance: 750 k-ohm + 20%/-0%, 10 M-ohm ± 10%. Measurement Voltage: DC (19±1) V (open circuit).
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