Can I salvage my GB Instruments multimeter?

Question

I was playing with the wonders of transformers in series and somehow fragged my multimeter (sure, the voltage was like 1000V, but at like .0000001A :( ) and anyways, now I get a steady 4.5V AC for my main wall (normally about 121V if my memory serves me) current and .05V DC for fully charged NiMH AA's (normally around 1.65V). Is it possible my multimeter's voltage sensor has been reprogrammed by the high voltage to a factor of about 26? Can this be remedied without trashing my precious multimeter?

GB Instruments GDT-11 multimeter. $20 at Wal-mart.

-Andrew

James Sweet · Accepted Answer

Unless you just want a challenge, buy a new one, it's not worth much effort for such a cheap meter.I'd start by checking resistors in the input section, that's about all you have much hope of fixing.

Ross Herbert · Answer

Good advice. The GDT-11 is even cheaper than USD20 here

Andy · Answer

Most recent cheap digital ones have the main chip bonded to the PCB with a plastic blob over it , and can only be repaired  by replacing  the whole PCB. You would never be able to get one ,and therefore would be uneconomic. Earlier models used the famous 7106 A to D chip which can either be unplugged ,or unsoldered from the PCB ,and replaced for about £5 British Pounds

Can I salvage my GB Instruments multimeter?

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