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#161732 - 04/07/07 03:55 AM Sperry multimeter non true rms
Frank Cinker Offline
Member

Registered: 07/29/01
Posts: 317
Loc: Pennsylvania
I just purchased a nice little Sperry DSA-500 multimeter at Home Depot for $49.00. It seems to work just fine. However, it is not a true rms multimeter. Will it still measure voltage accurately?

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#161790 - 04/07/07 05:16 PM Re: Sperry multimeter non true rms [Re: Frank Cinker]
Trumpy Offline


Member

Registered: 07/05/02
Posts: 8552
Loc: SI,New Zealand
Depends on what sort of accuracy you require.
Any non-TrueRMS meter will test the Average voltage (as in 63.7% of the peak voltage) as opposed to 70.7% (RMS).
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#161838 - 04/08/07 03:31 AM Re: Sperry multimeter non true rms [Re: Trumpy]
Frank Cinker Offline
Member

Registered: 07/29/01
Posts: 317
Loc: Pennsylvania
I just need it to test voltage drop at the outlet, neutral-ground voltage etc.

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#161840 - 04/08/07 03:40 AM Re: Sperry multimeter non true rms [Re: Frank Cinker]
Trumpy Offline


Member

Registered: 07/05/02
Posts: 8552
Loc: SI,New Zealand
By rights, there should be no voltage between these conductors.
I could be wrong too.
Frank,
A T-RMS meter is only of value to those that measure voltages with lots of harmonics on the supply.
The average electrician doesn't need to worry , I have one, but I wouldn't recommend every guy runs out and gets one.
My Fluke 80 does just as gooder job and why spend good cash when you don't have to?.


Edited by Trumpy (04/08/07 03:49 AM)
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