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UNI-T UT89XE: 20000 manual ranging counts of pure fun - impressions & teardown
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rsjsouza:

--- Quote from: indman on May 17, 2022, 02:10:29 pm ---
--- Quote from: rsjsouza on May 17, 2022, 10:24:45 am ---Avelino, this is a nice showdown of the UT89XD.

--- End quote ---
UT89XD и UT89XE - These are completely different models in terms of characteristics, do not confuse them. :)

--- End quote ---
You are obviously 100% correct  |O
Avelino Sampaio:
Today I decided to test if the least significant digit, in the 200m DC range, provides minimally reliable values. This range doesn't have much resolution, going down to 10µV. I used a 50µA current source to generate 20µV and 50µV voltages and the result was that I can trust the reading. The AN870 did well too, despite its last digit being irritatingly restless.
Avelino Sampaio:

--- Quote ---Regardless, the mechanical build and display are lightyears ahead of the AN870 indeed, but the durability of the rotary switch is still something that remains to be seen, since a manual range requires much more work from the switch.
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Rafael, the vintage M840D is 22 years old with me and has only a small bad contact of the key, in the range of 2m of the DC current. Mechanically, I trust the Uni-t experience a lot. I'm getting rid of the Aneng gauges, as they have problems with the selector switches. This retro design of the UT89XE won me over and its ergonomics are incredibly good.

I will keep my vintage M840D (2000 counts) in operation as it is in good health and it surprises me how it still has good accuracy. It uses the famous 40-pin ICL7106. I'll leave some images, by way of curiosity for newbies.
Avelino Sampaio:
Hi

Finally a new quality multimeter (BM869S), purchased at Welectron.
Here's a table I made, comparing different measurements.
Very satisfied with the UT89XE. Its ergonomics are incredibly good.
I already got rid of the Aneng 8002 and soon I intend to get rid of the aneng AN870.
Martin72:

--- Quote ---An Error Has Occurred!
You are not allowed to access this section
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Appears when I try to download the table file..
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