On 01/02/2021 09:36, Harry Bloomfield wrote:
John Rumm formulated on Sunday :
I did try some experiments a while back to see if I could trick it
into giving a false reading. I could not get a false negative out of
it, but did manage one false positive - although had to try hard!

http://wiki.diyfaq.org.uk/index.php/...ck_experiments

They are the best thing since sliced bread, if you thoroughly understand
fully their limitations.

I find the "beep" facility quite handy at times - plomp it down close to
a circuit you want to turn off, go to (typically unlabelled) CU, and
turn off MCBs until the bleeping stops!

--
Cheers,

John.

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