My new Klein NCVT1P responds correctly to turning on and off with lights and beeps but makes no sound when testing a known good circuit.(the red led illuminates but no sound) Is there a switch to change it from silent to audible notification of voltage?
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Hi @timmcintyre
According to the user guide there is a silent mode
"The tester can be operated with only visual indication of voltage. With the tester powered off, press and hold the power button (4) until the green LED (2) illuminates, then release."
If it is disabled then perhaps performing the same procedure will enable it, it doesn't say.
If not, return it for a replacement or a refund
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Turn the tester on by pushing the button and immediately releasing it. Don’t wait for the audible beep as happens when you hold the button to turn it on. Simply press and release
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