Products > Test Equipment

A look at the Uni-T UT210E

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thaistatos:
anyone found a solution with brighter backlight while using rechargable Eneloops?
I do not know if there is a separate led driver (but most probably backlight would not dim that much with fading battery voltage)  or if it is just directly connected to the batteries with a current limiting resistor?

stj:
it's just a current limiting resistor.

thaistatos:
according to this:
https://lygte-info.dk/review/DMMUNI-TUT210E%20UK.html

--- Quote ---Backlight only works down to about 2.6V where it is fairly dim.

--- End quote ---

it might match with current/voltage diagramm on page 15:
http://docplayer.net/45296962-Nf2w757gt-v1f1-pb-free-reflow-soldering-application-built-in-esd-protection-device-rohs-compliant.html
65mA for 2.7V, 10 mA for 2.6V

Might be a reason to switch to amber LEDs which might have lower forward voltage, like in Brymen BM257S or BM 319S, both powered by 2x1.5V batteries.
On the other hand, Brymen BM235 with also 2x1.5V power supply works till DMM shuts down:

https://lygte-info.dk/review/DMMBrymen%20BM235%20UK.html

--- Quote ---Meter works down to 1.7V where meter turns off, battery symbol show at 2.5V.
Backlight fades with falling voltage, but works down to meter turns off

--- End quote ---

I didn“t find a white led with low forward voltage around 2.2V.

stj:
it's actually not bad at 2.4v - perfectly viewable.
i actually heard people complain it was too bright at 3v

thaistatos:
I run into problems flashing the chip.
I followed instructions from
got a programmer, test clip, reading of data was ok and was exactly the same the examples.
When trying to flash there was a message " chip main memory with the contents are in disagreement"
Software version used was 1.29 on Windows 10.
I tried different other older and newer software versions without success.
erasing and verifying even without test clip attached gives the same positive feedback.
I assume test clip should be ok, as reading was without problems.
There are rumors that 1,29 could not write, but other software versions did not help.
Any ideas?

edit:
Solution: checked the continuity between the pins at the flasher and the pins at the PCB with attached test clip. Turns out test clip is crap. I had to push it directly to the PCB, otherwise it either looses contact on pin 4 GND or pin 7 WP.
Does anyone has a link to better test clip available?



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