Re: Voltmeter Question !!!!
- From: chuck <nospam@xxxxxxxxxx>
- Date: Thu, 24 Aug 2006 20:30:29 -0400
jo.jo wrote:
Hello again,
I have a vary basic voltmeter (mastech M-830B) and I have a question
about the AC measurement setting. I know that when you use it to
measure an AC wave form (sine wave) it shows you the RMS value, what I
was wandering was does the meter show the RMS value for any periodic
wave or just sine waves ??????
Even if your meter is a "true RMS" type, it will probably not give accurate readings for all non-sinusoids. The shape of an input signal can have a substantial effect on the meter's accuracy.
If you are interested in this, do a search on "crest factor" and TRMS.
Chuck
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