Products > Test Equipment
A look at the Uni-T UT210E
cdev:
My unt-T is usually within the spec for the range it is on. I demagnetize it now. If you measure high currents you should degauss it periodically. It may have picked up a magnetic charge. When you are finishing with your degaussing, dont just turn the degaussing tool off - slowly remove your Uni-T from the magnetic field.
If you do that you should be fine. I use a bulk tape eraser I have from back in the day.
joeqsmith:
--- Quote from: Kean on July 25, 2020, 04:57:55 pm ---
--- 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.
--- End quote ---
So 2A scale, 200mA low? That's even worse. The very first post is more what I would have expected.
https://www.eevblog.com/forum/testgear/a-look-at-the-uni-t-ut210e/msg560006/#msg560006
I had ran a short term test on drift and even that looked pretty decent.
https://www.eevblog.com/forum/testgear/a-look-at-the-uni-t-ut210e/msg951626/#msg951626
I wonder if they really cheapened these things up. Friends of mine all purchased them around the same time. I have two of these, one is highly modified but the other one, I degaussed and trimmed the adjustments to get the best performance I could. It has no other mods. It's a few years old now. Let me just see how much it's drifted.
*****
Fresh charge on batteries in the 210E, the DC offset was 440mA. Degauss brought it down to 17mA which should get us in the ballpark. Connected the bench supply in series with one of my BM869s meters using the Amps. 210E was zeroed for each reading.
BM869a / UT210E
15.8mA / 17mA
32.7mA / 33mA
168.1mA / 165mA
1.6491A / 1.608A
With the two BM869s in series
BM869s / BM869s / UT201E
2.0069A / 2.0069A / 1.956A
6.057A / 6.057A / 5.80A
Looks like it could stand to be adjusted again. Still, for a $30 DC clamp with mA resolution, I can't bitch too much. They have paid for themselves just in hunting down a few automotive leakage problems.
brainwash:
I bought mine just to check how much current a motor starter needs (a friend's bike), so basically a single-use meter. The output was as expected and I was happy. Then noticed the charging current was high, while the meter was still clamped. Diagnosed a defective regulator that was feeding >15V into the battery, which is why the batteries were slowly getting killed. Strangely, a voltmeter measured fine -whenever a new battery was installed - but it slowly killed them causing the starter to spin slower and slower.
A few weeks ago had an issue with my car and noticed the battery balancing current was reading weird (it has two lead-acid batteries). This pointed to a big leak which pointed to the navigation unit not shutting down. The advanced car diagnostics did not pick up on this problem, it was just telling me "low voltage" after a few days of sitting, causing me to think that the battery went bust.
So the meter already paid for itself multiple times.
Stinger:
Hello,
No new hack (or newers models) with min/max, rel, temp and frequencies ?
Martin72:
I´m afraid not.
But there are the UT211 Models in the same size, they came with 6000counts and better accuracy along.
I would grab one, but unfortunately the interesting 600mA range does only in AC mode exist.
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