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New UNI-T UT210E PRO problem
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sky666:

--- Quote from: Doctorandus_P on October 01, 2020, 02:26:06 pm ---It's a cheap meter, and it's got a DC current range with 1mA resolution.
Hall sensors are inherently quite bad at drift specifications, and added to that you also have residual magnetism and hysteresis in the clamp itself.
Changes on the display when the meter is rotated are due to the earth magnetic field and this means that it's resolution is about as sensitive as you can possibly get with this class of meters.

So a bit of drift for this class of meter is normal. Just be happy you've got a 2A DC current range at all.

--- End quote ---

You may be right but the fact that many of the devices are quite "normal" may mean that some of the devices are inadequately stored.  And that this problem is not due to the quality of the device.  I mean those devices with offset up to + - 0.020A.
sky666:

--- Quote from: Hydron on October 01, 2020, 12:18:01 pm ---So for comparison my meter looks as seen in the following pictures. Jaws are a little dirty but not scratched up. When new it the offset was a bit higher, but I've managed to magnetise it then degauss it a couple times since.

Personally I would have a go at degaussing the clamp (even twirling a magnet on a stick around the jaws while moving slowly away might do the trick) and wouldn't worry about it too much as long as the offset can be zeroed out - some offset is unavoidable (e.g. mine gets about 4x worse than shown in the pic depending on orientation vs the earth). Also worth a quick check vs a normal meter.

--- End quote ---

Can you tell me please where did you buy it? From a local store or online store in Europe?
Circlotron:
I initially had NiMH batteries in mine and then I changed over to normal alkalines and with their slightly higher voltage it seemed to drift less. Might be my imagination, but that's the impression I got at the time.
sky666:
I tried with brand new Duracell, no change.
indman:
I recorded video of process of resetting to zero of the current indications in the DC mode at UT210E. This method allows to reduce residual indications in the mode of measurement of a direct current (DC 2A Dotless, 2A,20A,100A) without the need for EEPROM correction without the programmator. Thanks of kDnZP from a Russian-speaking forum!

ATTENTION! To do only if there is a backup copy of EEPROM!

1. To switch off device.
2. To clamp HOLD+SELECT and to switch to the "resistance, ring-up, diode, condenser" mode.
3. To see a text of "CAL", to release the HOLD+SELECT buttons
4. To wait. To wait long and not to hurry. To wait so far there will pass all self-tests until squeaks, then still to wait and wait for the moment when there are changing indications of the millivoltmeter. I.e. when the self-test will be completely passable, it will take ~ 2-3 minutes.
5. Further it is possible to switch the selector on 20A, to press the ZERO button and to nullify indications. At the same time the instrument in hand not to hold, give time for that that indications calmed down, to place the instrument where least of all el./magn. noises and the more so far away from magnets.
6. To switch the selector on 2A and to repeat the same as in point 5.
7. If necessary it is possible to modify values on other interesting ranges
8. On the end of calibration - to transfer the selector to "OFF"
9. To switch on ut201e and to check indications, if necessary - to repeat.

The link to video which explains this process.
https://yadi.sk/i/bu8eS8uF3ZfK3E
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