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TENMA power supply 72-13360: not able to set the target voltage accurately

JeremieWerner

the power supply seems unable to set the correct voltage. anyone had that issue before? 

  • 0

    I have a similar TENMA model at home (I can't remember the model number right now) and it has similar issues. Sometimes the actual voltage can be off by a volt or so (mine goes up to 60V, 1.6A). I tried calibrating but after calibrating for few times it got worse. So I just use it as an inaccurate power supply...not for anything fine.

  • 0 in reply to saadtiwana_int

    Thanks for sharing this experience. how do you calibrate it? I can't find anything in the user manual. 

  • 0 in reply to JeremieWerner

    Ok, I found back my model number. It's Tenma 72-8340A.  Please have a look at the following link:

    https://www.eevblog.com/forum/repair/tenma-72-8340a-calibration-procedure/

    There is a pdf attached to the last post. You can try the same procedure for your supply....maybe the firmware is similar. Let me know how it goes!

    Best Regards,
    Saad

  • 0 in reply to saadtiwana_int

    thanks. the procedure doesn't seem to work. I can't get into the calibration mode. thanks for the help. I'll try to get it shipped back... 

  • 0

    in case someone has this issue, after discussion with vendor, we got a calibration procedure (here attached). but still not helping for the precision. we ended up buying another power supply in similar price range: MP711057 DC POWER SUPPLY. It works well and sets the correct voltage!

  • 0 in reply to JeremieWerner
    JeremieWerner said:
    MP711057 DC POWER SUPPLY

    That is an interesting one. I hadn't seen that before.

    SCPI. Isolated by default, so you'd be able to put some in series if you 'd  need a higher DC voltage...

    10 mV resolution, granular enough for a power supply.