EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: Mad Professor on January 12, 2013, 03:42:19 pm
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Good day all.
I am starting to get back into electronics, and as such I need to start getting new test gear.
I am currently out of work so trying to get new test gear on a low budget.
All the DVM/DMM I have owned in the past, have the min range of 200ohm.
I quite often am finding my self testing low resistance items, <20ohms.
My current DVM/DMM is a UNI-T UT58C, but I really need to have the readings to a resolution.
So can anyone recommend me a budget milliohm dvm/dmm that I can get hold on here in the UK.
Thanks for your time.
Best Regards.
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For milliohms, unless you wanna drop some serious cash for a 5 1/2 digit handheld multimeter, you'll probably want to get yourself an older bench multimeter with 4 wire kelvin bridge measurment capability, like the HP 3478A.
Check ebay, you shouldn't have any trouble finding old test gear there.
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When you say "serious cash" what are we talking about?
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If you also think of building a quite good solution yourself, have a look at this
https://www.eevblog.com/forum/projects/milliohm-resistance-adapter/msg170984/#msg170984 (https://www.eevblog.com/forum/projects/milliohm-resistance-adapter/msg170984/#msg170984)
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5 1/2 digit handheld? you meant 4 1/2??? those are not that cheap but cant beat the 4 wire measurement of a bench meter
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Maybe one cheap solution, depending on the accuracy and minimum value you want to read, the Uni-T UT61E. Being a 22,000 count meter it will read down to 10 milliohms. Granted the accuracy will be horrible down that low, but it gets you reasonable accuracy at 1ohm. ±0.5% +10 digits. It is a reasonable meter for almost any use too except higher than 250V for around $60USD. I am sure it is available in the UK or online shipped to the UK. dealextreme.com has it.
Another more expensive option might be a Brymen 50,000 count meter. A Brymen BM857A can be had for around $110 EU and will again read down to 10 milliohm but with accuracy on ±0.1% +6D. It is also a much better meter in every other aspect compared to any Uni-T for build and safety.
If you want REAL accuracy in the milliohm range, well be prepared to watch ebay for the random bargain in a 6.5 or more used bench meter, or spend some big money.