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Author Topic: Checking VOM  (Read 365 times)
SV1ENS
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Posts: 124


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« on: June 03, 2008, 12:35:43 PM »

Hi All,

Any tips on how to check if a digital VOM is reading
properly ?

73
Demetre - SV1ENS


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K7KBN
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Posts: 2760




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« Reply #1 on: June 03, 2008, 08:12:12 PM »

Check with another meter.

For resistance ranges, use a known-good resistor.  For DC, use a 1.5 volt cell, or a 9 volt battery.  For AC, use your mains.

Lots of ways.
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73
Pat K7KBN
CWO4 USNR Ret.
SV1ENS
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Posts: 124


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« Reply #2 on: June 04, 2008, 10:22:03 AM »

Hi Thanks for the reply...

I tried a second VOM, there were differences, so the question is which one was the correct one ?

As for the dry cells, they told me that the meter measures correctly at 9 and 1.5 volts, what about the rest of the ranges...

The mains, isn't stable enough for a AC reference...

I was hoping there would be a quick and dirty way of checking the VOM, apparently there isn't... I'll try to locate someone with a calibrated VOM to check my VOM.

73
SV1ENS
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K7KBN
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« Reply #3 on: June 04, 2008, 05:38:04 PM »

That's actually the best way.  When I suggested checking against a second meter, I had in mind a second meter that was known to be good.

73
Pat
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73
Pat K7KBN
CWO4 USNR Ret.
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