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Clampmeter Uni-T UT210E AC mode and NCV mode not working

AC mode and NCV mode do not work in Uni-T UT210E current clamps. The display shows OL.

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hcs
hcs picture

You can download the schematic from here: https://elektrotanya.com/uni-t_ut210e_schematic.pdf/download.html

Inputs has protection devices. Check pnp/npn transistor pairs, ptc devices if the other functions ok. If the main chip is failed, you can find a replacement and maybe firmware for it. This clamp meter is a popular and well documented instrument.

Good luck.

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lcsaszar
lcsaszar picture
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DC voltage and clamp current measurement is OK?

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