Help needed with Neutral to Earth short

[howieleem]

Yes it does dissapear with a bulb connected, so it looks like there is not a problem, and the bulb that blew must have blown for no reason, cheers.

 

[Taylortwocities]

 

[TheOriginalTonkaToy]

Yes it does dissapear with a bulb connected, so it looks like there is not a problem, and the bulb that blew must have blown for no reason, cheers.

Modern digital multimeters have very high input impedances and that means that extremely high impedance sources (i.e. capacitively or loosely inductive coupled) will present as a reading on them - the input impedance is too high to 'damp' the spurious reading.

Bring back the moving coil, I say

You might want to Google the meaning of 'Occam's Razor' by the way

 

[ban-all-sheds]

Bring back the moving coil, I say

http://www.ebay.co.uk/dsc/i.html?_n...=0&_trksid=p3286.c0.m270.l1313&LH_TitleDesc=1

 

[JohnW2]

Bring back the moving coil, I say

I'm pretty sure that I've seen digital multimeters with switchable resistors across the input on voltage ranges - to lower the input imedance and address the issue you mentioned.

Kind Regards, John.

 

[echoes]

Bring back the moving coil, I say

40 years old (ish) and still going strong

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• echoes
• 16 Aug 2011
• 1

 

[TheOriginalTonkaToy]

I have an Avo 8 MKIII sitting on the shelf here

 

[echoes]

I have an Avo 8 MKIII sitting on the shelf here

Very nice! Can't quite compete with that. (I bet it has the rubber leads as well...)

 

[ban-all-sheds]

I have an Avo 8 MKIII sitting on the shelf here

http://www.ebay.co.uk/itm/Avo8-MkIII-Leads-Probes-Manual-circuit-etc-/270790217580

 

[JohnW2]

40 years old (ish) and still going strong

Mine's a different colour but similar vintage - and, again, still going strong (and, yes, I still use the original rubber-insulated leads!):

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• JohnW2
• 16 Aug 2011
• 3

Kind Regards, John.