Products > Test Equipment

A look at the Uni-T UT210E

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Fennec:

--- Quote from: shved on July 22, 2020, 04:32:27 pm ---Nobody have answered my question about Ali scams. I'll take one for the team.

I've taken a risk and made an order with Aliexpress. Waiting shipping and hoping this isn't a scam.
Will report on how it all went.

Shved

--- End quote ---

Holy this thing cost about 50.-. Are you afraid of starving now or do you have to sell your house? really.

Johnboy:

--- Quote from: Maxlor on October 10, 2015, 08:42:59 pm ---
<snip>

...is now selling these under the name Voltcraft VC-330.

--- End quote ---

Possibly worth repeating in view of the "EEVBlog effect".

Kean:

--- Quote from: Thickgit on July 22, 2020, 11:43:12 am ---Excuse my ignorance I'm but a simple spark. I am trying to understand a problem with the use of RCD's on 230VAC/400VAC supplies. Type AC RCD's do not work when DC current leaks in to the sensing coil, Type A RCD's can cope with <6mA DC current, Type F <10mA DC current and Type B can manage >10mA. This leakage current can come from various sources found in domestic and commercial properties Photovoltaic Systems, EV chargers etc. I bought this clamp meter thinking I could measure this low DC leakage current at the output of the RCD while the load was in place. I am now not sure whether I will get an accurate result when the load is drawing AC current and the leakage is DC current at the same time. :palm:

--- End quote ---

I would imagine in DCA mode any AC current should cancel out.

That said, it is worth noting that this meter isn't really suitable for measuring leakage currents as although it has 1mA resolution, the accuracy is +/-(2% + 8 counts) in DCA mode and +/-(3% + 10 counts) in ACA mode.

I have 3 UT210E and current measurement accuracy overall on these is pretty poor in my experience, even at currents of 100's of mA and with careful zeroing.  A no-name clamp meter I bought on ebay years ago is way better.  One day I might try adjusting them.

UT251A with 1uA resolution is suitable for leakage current measurement, but can only do AC current.

joeqsmith:

--- Quote from: Kean on July 25, 2020, 02:50:27 pm ---That said, it is worth noting that this meter isn't really suitable for measuring leakage currents as although it has 1mA resolution, the accuracy is +/-(2% + 8 counts) in DCA mode and +/-(3% + 10 counts) in ACA mode.

I have 3 UT210E and current measurement accuracy overall on these is pretty poor in my experience, even at currents of 100's of mA and with careful zeroing.  A no-name clamp meter I bought on ebay years ago is way better.  One day I might try adjusting them.

--- End quote ---

Seems odd you can't get a decent readings at 100's of mA.   I would have pitched them or ran them on the transient generator.   

Kean:

--- Quote from: joeqsmith on July 25, 2020, 04:21:50 pm ---Seems odd you can't get a decent readings at 100's of mA.   I would have pitched them or ran them on the transient generator.

--- End quote ---

Yep, I never got around to checking further as I noticed the inconsistency and just stopped trusting them.  I think all of mine read low by something near 10%.
Another thing I will put back on the TODO list - maybe something my new assistant technician can look at when he is out of assembly tasks.

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