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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I have an Everstart Jump Starter hp250,no AC adapter or manual. Not sure it even works. Is there anyway I can test it myself at no cost?


If the battery is discharged and been so for several months the battery is certain to be useless or nearly so. Lead acid batteries need to be kept fully charged or they die quickly. The standing rule for jumpstarters is to recharge monthly and after every use.

A cheap low powered jump starter will be cheaper to replace than to obtain a replacement battery but a replacement battery will be cheaper for a medium duty upwards and they are mostly easy to fit.

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The first solution is right on the money, It's the video card, or many of us today forget to plug the damm thing in and the computer doesn't read and we think that there is a serious problem. If none of this helps then try troubleshooting through this PC repair guide. Hope this helps.

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1 Answer

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Hi,

If the desktop charger is the version that can accommodate two radios simultaneously similar to the T5000, then the AC wall adapter or the power supply is 9 volts AC.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

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