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DVM meter capacitance mode has internal battery?

Discussion in 'Power Electronics' started by Davewalker5, Sep 26, 2014.

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  1. Davewalker5

    Davewalker5

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    Sep 20, 2014
    When using a DVM meter to measure capacitors

    In Capacitance mode there is an internal battery and a Diode?

    What is the diode used for and how does the diode get damaged?

    The internal battery needs to be changed, but the internal battery is only used for measuring capacitors

    Fluke 87
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    The internal battery is used for ALL modes.

    Without the battery your Fluke 87 is just an expensive paperweight.

    And sure there are diodes inside, but that's largely irrelevant.
     
  3. Davewalker5

    Davewalker5

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    Sep 20, 2014
    But the internal batterys voltage is what? to measure a capacitor? also what is the internal diode for when measuring the diode?

    The Internal battery has a higher test voltage for capacitors? and the internal diode in the capacitance mode does what?
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    The internal battery powers the multimeter.
     
    KrisBlueNZ likes this.
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