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Pat tester issues

Gerard O'Neill

Have used a First Stop Pat tester which is fully calibrated etc.  NO passing issues on extension leads etc. Long or short.  Bought a new PAT tester (lower one in photo) which appears to be an upgraded model. However, all power cord tests fail. Pass on older device and fail on newer device.  Scratching our heads to work this out.  Supplier  a tad surprised too. We even swapped the new unit in case it was faulty and no difference. Any ideas?  Any one else having issues with latest version of first Stop  PAT tester? 

 

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  • 0

    Which measurement is actually failing are there actual readings you can report ?

    I'd expect a tester checking an  extension lead to be doing 3 distinct tests
    1) resistance of copper conductors - should be low, sub ohms
    2) resistance of insulation - should be high, megohms  and
    3) polarity/ cross-over checks - and that should be 'no crossovers'/

    Which test is actually failing may be a clue.

    Mike.

  • 0 in reply to mapj1

    Nothing that complex.  A simple Pat test using the power cord button option. (4th button on bottom) 

    Older tester: passes.  New tester and both units fail.  Wondered if anyone else had seen this? 

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