two PAVM

Discussion in 'General Electronics Chat' started by DexterMccoy, Apr 21, 2014.

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  1. DexterMccoy

    Thread Starter New Member

    Feb 19, 2014
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    When using Two Phase angle volt meters with the same reference sync frequency but the Reference voltage is different

    Example

    Phase angle volt meter#1 Reference at 60hz at 120Volts
    Phase angle volt meter#2 Reference at 60hz at 26volts

    What does having a different voltage on the REFERENCE input do?

    The Reference sync/frequency is the same only the voltage is different
     
  2. bance

    Member

    Aug 11, 2012
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    34
    Does it give a different reading?
     
  3. DexterMccoy

    Thread Starter New Member

    Feb 19, 2014
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    Not that I know of, it seems to be the same

    But maybe it does for some reason, but i'm not sure what the reason is

    Why would having a different voltage on the reference inputs make a difference in the measurement?
     
  4. antonv

    Member

    Nov 27, 2012
    149
    27
    I suspect the reference input is for phase only, the voltage just has to be in an acceptable range for the phase detection circuitry to be accurate.
     
  5. DexterMccoy

    Thread Starter New Member

    Feb 19, 2014
    429
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    Yes but one PAVM says to be at 120VAC at 60hz and the other PAVM says to be at 26 VAC at 60hz

    What is the difference between 120VAC VS 26 VAC when using the Reference input on a PAVM?

    It will do what different?
     
  6. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,004
    1,523
    The difference is - 94VAC
     
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