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New UNI-T UT210E PRO problem
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sky666:
Hi guys,

I know you are already tired of questions about the UNI-T UT210E clamp meter but I recently bought a new model UT210E PRO version. According to several reviews of the standard model, I could see that in the DCA area it shows a value that deviates slightly from 0.000A without load and without the zero button being pressed. In my case the value is around 0.220 - 0.300A. After pressing zero the button varies between 0.000 - 0.005A without any movement of the device or close external magnetic field. Do you think this is normal?


Another thing that is important to me is that the sensor on one side of the clamp looks pretty scratched. It can be seen in the picture. I would be grateful if any of you could take a picture of the sensor on his clamp meter just to see if such scratches are normal.


Thank you

Edit: It does not have to be a picture strictly of this multimeter, it can be from the sensor of any clamp meter.
Tarloth:
I've never seen a "pro" model, even the UNI-T site not mention it, maybe a counterfeit? But, I'm not sure, not a fan of UNI-T or following with attention their products.

https://www.uni-trend.com/html/product/General_Meters/digitalclampmeters/UT210_Series/UT210E.html
Qw3rtzuiop:
The pro model has some advantages. Btw. i noticed a similar behavior at my normal UT210e
Hydron:
Without a properly closed magnetic circuit (i.e. a different type of clamp) any clamp meter measuring in the ~2A range will see some offset due to the Earth's magnetic field.
This is exactly what the zero button is for, though even with this you need to be careful to not change the orientation etc (ideally zero with it around an unpowered conductor, or if not possible move the least amount when clamping).

Edit: checked mine and the offset before zeroing is a fair bit less than the value you are seeing. Maybe yours needs a degauss?
Also, the PRO seems like a _very_ minor upgrade unless you regularly want to use the probes to measure frequency.
thm_w:
Scratching could be them grinding the two edges flat to meet flush.


--- Quote from: Qw3rtzuiop on September 29, 2020, 08:39:11 pm ---The pro model has some advantages. Btw. i noticed a similar behavior at my normal UT210e

--- End quote ---

Well, according to that chart it only has the one advantage that it measures frequency. Seems kind of pointless for most people.
edit: I'm blind.
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