zap
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- Reaction score
- 65
I have an MI 3125B. When testing for Zs at a socket I touched the test button with my thumb, the tester buzzed and displayed the 'dangerous voltage on PE' symbol. So I de-energized the system to look for the fault. There was no fault and insulation resistance at 500V DC was >999 MOhms.
I thought, strange, and proceeded with the Zs test again. I tried touching the button with other digits on both hands and it only alerted me to a fault when touching the button with my right thumb. I then asked a mate to touch the button and no alert so he pressed the button and the test result was very good. Why would this happen? Has anyone else experienced this?
I do have a calibration certificate for the metrel but not my thumb.
I'm awaiting for a response from Metrel.
I thought, strange, and proceeded with the Zs test again. I tried touching the button with other digits on both hands and it only alerted me to a fault when touching the button with my right thumb. I then asked a mate to touch the button and no alert so he pressed the button and the test result was very good. Why would this happen? Has anyone else experienced this?
I do have a calibration certificate for the metrel but not my thumb.
I'm awaiting for a response from Metrel.