Electronics > Repair
UT61E DC voltage measurements problem
(1/1)
Buhefade:
Hello
I tried to dig through Ut61e posts but I wasn't able to find similar problem
-On DC voltage (both auto/manual) display can't be zeroed even when probes shorted (shows small negative voltage)
-gives different results when probes switched. Example: read out +4.5V - > switch probes and same potential read out - 2.4v.
-measurements are not sonsistent in overall.
Tried:
Board nad main switch cleaned
VR1 replaced
Corrected soldering around main IC

Mickle T.:
If there is no contamination on the printed circuit board and on the switch lamellas, then I see only two reasons for the zero shift of the multimeter: failure of the auto-zero correction capacitor C6 470nF (pin 14) or breakdown of the input circuits of the ADC U1 ES51922.
Navigation
Message Index
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod