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To much voltage on my multimeter.... :(
1/13/2011 9:16:07 PMJ-F
I think I applied a voltage exceeding 750 VAC on my multimeter. Since then, the meter turns on but does not measure the voltage or current (AC or DC). Is there any protection other than the fuses that I could check or change or do I put it in the trash?

No burned part, no smoke. Only a spark between the probe and the wire I was trying to measure (I never touched it!) and a "dzzz" in the meter...

1/13/2011 9:29:30 PMLewis L
:I think I applied a voltage exceeding 750 VAC on my multimeter. Since then, the meter turns on but does not measure the voltage or current (AC or DC). Is there any protection other than the fuses that I could check or change or do I put it in the trash?
:
:No burned part, no smoke. Only a spark between the probe and the wire I was trying to measure (I never touched it!) and a "dzzz" in the meter...


Digital or analog?
Lewis
Lewis

1/13/2011 9:32:44 PMJ-F
It's a digital multimeter 22-168A Radio-Shack.
1/13/2011 10:28:45 PMTerry Decker
:It's a digital multimeter 22-168A Radio-Shack.
:
From your post, it appears that you pulled it apart. If there is a fuse and it's not blown, or no fuse and no burnt diode or current limiting resistor, then I'd say it's toast. A lot of these digital meters are so cheap that they are considered disposable.
I have a Triplett model 64 analog FETVOM and that darn thing is protected six ways from Sunday. It has a one amp fuse at 250 and a 3 amp at 1,000 volts. I've never come close to that. I also have a Tenma digital with current clamp, temp probe, and a 400 amp range. All the bells and whistles and it cost me about 10 bucks.
Terry

1/14/2011 10:16:45 AMWalter
I have this same meter sitting in a junk box trying to decide what to do with it. It is also 'smoked' and flashes OL on the display. I do see a burn mark on the selector switch board.
It was built by Metex as the model M-3650D and has been discontinued for about 5 years now. I sought company support and advice. There is no authorized service facilities in the U.S., only Korea.
I hate to throw things away, but this unit has no future and it was time to move on. I bought a Tenma 72-7730 from MCM with more functions than I need presently and I'll be more careful with the probes this time.
1/14/2011 12:08:54 PMTerry Decker
: I have this same meter sitting in a junk box trying to decide what to do with it. It is also 'smoked' and flashes OL on the display. I do see a burn mark on the selector switch board.
: It was built by Metex as the model M-3650D and has been discontinued for about 5 years now. I sought company support and advice. There is no authorized service facilities in the U.S., only Korea.
: I hate to throw things away, but this unit has no future and it was time to move on. I bought a Tenma 72-7730 from MCM with more functions than I need presently and I'll be more careful with the probes this time.
:
The Tenma is the same meter I have. Don't ya love it. Actually, you'd be surprised how often I use the temp probe. Transformer temp, output transistor, even checking an air conditioner. It's not 'dead on' accurate, but close enough for me.
Terry
1/15/2011 11:47:57 AMJ-F
Well, definitely dead...

But I have a Fluke 83 and a Simpson 260. That one can measure up to 5000 V and it seems easier to repair! :)



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