Pat tester issues

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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  • Hi Everyone,

    thank you for taking the time to reply and make suggestions. Exactly why I popped the question on here.

    Its the polarity test that is failing on the new model compared to the old model and we have been talking to technical support at  the suppliers too. They are scratching their heads.

    We have tried lots of leads from "kettle" leads to extension leads. pass on old model, fail on new model. 

    Intrigued. 

  • Its the polarity test that is failing on the new model compared to the old model and we have been talking to technical support at  the suppliers too. They are scratching their heads.

    Yes, that sounds odd - particularly if you have checked the connections yourself with a multimeter, and it checks out on the old tester, it really does seem like a question for the manufacturer.

    I wonder whether they have a production line with someone making an error with internal wiring swapping L and N connections? It has been known in the past (and on many appliances, it doesn't matter).

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  • Its the polarity test that is failing on the new model compared to the old model and we have been talking to technical support at  the suppliers too. They are scratching their heads.

    Yes, that sounds odd - particularly if you have checked the connections yourself with a multimeter, and it checks out on the old tester, it really does seem like a question for the manufacturer.

    I wonder whether they have a production line with someone making an error with internal wiring swapping L and N connections? It has been known in the past (and on many appliances, it doesn't matter).

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