Electronics > Beginners
Possible for newbie to fix autoranging on a Mastercraft multimeter?
Hogwild:
Hi everyone:
I have quite good soldering skills, but next to no understanding of electronics theory. My (ver. 1) Mastercraft 52-0052-2 multimeter still works, but the autoranging has stopped working, at least most of the time.
I plan to do a visual inspection of the inside, but is there anything in particular I can look for with the symptom being autoranging not working, or am I wasting my time? Is there anything in particular which frequently causes autoranging to stop working that is fixable?
Thanks
GerryR:
If it is working some of the time, I would be looking, with a magnifying glass, for cold (frosty looking) solder joints. Touch them up and you should be good to go.
Hogwild:
It rarely works, but it still does occasionally. Thanks, I will look for cold joints and post back with my findings.
MosherIV:
Hi
Auto ranging is usually done in software. The software usually checks inputs of highest range and if not near full scale goes and checks next range down, repeats until it find range that is not over flowing.
Clean the probe end, connectors and the sockets in the dmm.
When you say works sometimes, is this on Volts or Volts and Ohms?
Hogwild:
Hmmmm...good question. I'm not sure. I've mostly only measuring resistors lately with ohms. I will try both and see what happens.
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