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Hello,
im using this tester at work, and im testing a medical fridge that i have modified (in accordance to local procedures) its been a while since i used any form of tester, but today i came across an oddity.
i did the earth bond test, and it passed, i did the insulation test (500V) and it passed, but when i came to load test it (class I), it says 'external voltage is present, clear it before continuing'.
ive tested many of these and not seen this before, the fridge plugs into the tester, and the tester into the wall socket. where could this external voltage be coming from or is it a red herring?
thank you for your time
im using this tester at work, and im testing a medical fridge that i have modified (in accordance to local procedures) its been a while since i used any form of tester, but today i came across an oddity.
i did the earth bond test, and it passed, i did the insulation test (500V) and it passed, but when i came to load test it (class I), it says 'external voltage is present, clear it before continuing'.
ive tested many of these and not seen this before, the fridge plugs into the tester, and the tester into the wall socket. where could this external voltage be coming from or is it a red herring?
thank you for your time