If you are not using a continuous or a constant monitor, a wrist strap should be tested while being worn at least daily. This quick check can determine that no break in the path-to-ground has occurred. Wrist straps should be worn while they are tested. This provides the best way to test all three components: the wrist band, the ground cord (including the resistor) and the interface with the operator's skin. If the wrist strap tester outputs a FAIL test result, stop working, and test the wrist band and cord individually to find out which item is damaged. Replace the bad component, and repeat the test. Obtain a PASS test result before beginning work.
The Vermason Portable Wrist Strap Tester is a battery operated “on demand” wrist strap tester. When the wearer of a wrist strap plugs in their coiled cord and pushes the metallic electrode of the Portable Wrist Strap Tester, a path for current flow is completed from the wearer’s skin, through the wrist strap. This action will cause the green “test good” LED to illuminate as long as the resistance of the circuit path is between 750 kilohms and 35 megohms.
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