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sudar selvan
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Join Date: Jun 2012
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Electrical Engineering

06/19/2012 1:07 PM

what is null voltmeter?

how do work?
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redfred
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#1

Re: electrical engineering

06/19/2012 1:14 PM

A null voltmeter is an instrument that very accurately measures only when a null or zero volts exists across two points in a network. This is used predominantly in a Wheatstone Bridge. Don't confuse this with the Whitestone Bridge.

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Doorman
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Hobbies - DIY Welding - Don't Know What Made The Old Title Attractive... Popular Science - Weaponology - New Member United States - US - Statue of Liberty - 60 Year Member

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#2
In reply to #1

Re: electrical engineering

06/19/2012 5:33 PM

I don't know about anybody else, but I think your response has Good Answer written all over it, and I vote accordingly.

And I learned something new. That's why I like hangin' around with you guys.

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sudar selvan
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#3
In reply to #1

Re: electrical engineering

06/20/2012 11:39 AM

the null voltmeter is used in generator control panel for AVR, in that position, which two points across checked?
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redfred
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#4
In reply to #3

Re: electrical engineering

06/20/2012 11:42 AM

Do you honestly think that I can see where those two wires are connected from here?

You might as well ask me, "Where does this go?"

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pravinba@yahoo.com
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#5
In reply to #3

Re: electrical engineering

06/23/2012 1:46 PM

Null voltmeter in AVR panel is energised from the control card. Null voltmeter simply reads the difference between the Auto & Manual Regulation references. please read the AVR operating manual for more details..
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