DSN-VC288 Voltmeter Ammeter 0-100V 10A - Connection, Shunt & Calibration Issues

Hi, I know that the topic seems prosaic, but with my "Voltmeter module 0-100V ammeter 10A + shunt" there is something wrong. Of course, the module is new. I connect it according to the diagram with a separate module power supply.



And I get something like this:


I guessed that you need to use a shunt, because in my version it is not even soldered into the module as in the picture


After assembling, something is wrong with the ammeter reading, instead of 0.00 it shows 0.34, when the voltage is applied it shows ok. The ammeter also works, but without load it should be 0.00. I tried to adjust the current on the potentiometer, but it doesn't change much. System damaged?

corpha76lon wrote:

instead of 0.00 it shows 0.34

I do not know this module, but you do not write anything here that you did the ammeter zeroing procedure by closing the jumpers (points) marked "I ADJ Z" during power on without load. As it says in this picture you posted. The potentiometer, as I guess, only changes the sensitivity of the ammeter.
Of course, you must also have the shunt connected during the zeroing procedure.

Yeah, I did, and now he's freaked out. From 3.5V it shows 44.5V. The ammeter is also not working properly. Well, this is how you buy the cheapest Chinese mountains ... Well, the topic of how quickly it arose so quickly can be closed. The module lands in the garbage can.