I have a generic DVOM that is having issues. It wont read volts or Ohms, but it will read zero Ohms when shorting the leads. The shunt inside looks to be burnt. Can I use solid copper wire to replace it?
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Re: Repairing shunt in DVOM??
1) Can we get a picture of the front of it so we can see the brand name and model number?Originally posted by asand1 View Post
2) To measure volts and ohms, the current shunt is not used at all. Do not replace the shunt with a copper wire.
3) In cheaper multimeters, the current shunt usually looks like crap. From the picture, it looks normal to me.
4) If you try to measure an AA battery, what DC volts is the multimeter showing?--- begin sig file ---
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Re: Repairing shunt in DVOM??
5) A clear focused picture of the entire backside pcb would also help.--- begin sig file ---
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Re: Repairing shunt in DVOM??
Your pictures are blurry. If you're talking about the solder, it was added to decrease the shunt's resistance. Sometimes it is nicked or crimped to increase the resistance. This is done to improve the accuracy of the high-current range.
Absolutely, positively, what he said.Originally posted by retiredcaps View PostComment
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Re: Repairing shunt in DVOM??
6) Did you have an oops moment? Like trying to measure mains AC with the dial set on resistance?--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
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