Question about Mastech 19-range Digital Multimeter Dmm Mas830b

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Displaying incorrect voltage nearly an addition of 30 volts in actual AC supply

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I would try to remove the battery.
Wait awhile and reinstall.
This might reset the meter.
Install new battery also may help.

Posted on Jan 03, 2011

  • amitsriva190 Jan 03, 2011

    Thanks, Will try the tips provided by you.... May be you are right as I was seeing battery low indication also at the time of incorrect voltage... Will update you tomorrow

    Thanks :)


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Mine was reading 50-60 volts high on AC while the screen was perfectly contrasty, seeming to indicate the battery was fine. new battery fixed it.

Posted on Apr 02, 2013


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