Electronics > Beginners
Problem with my multimeter
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Electro Detective:

--- Quote from: JS on May 17, 2018, 10:24:30 pm ---
He should open it anyway and start poking around, what do we do if not?

JS

--- End quote ---

I feel your pain bro  :'(

Zero999:
Please don't use that meter for hazardous voltages i.e. anything above 60VDC or 30VAC! It's not safe.

The 10A current measurement is also unfused. Don't use it on anything not powered from a current limited power supply small battery (i.e. AA cells), otherwise it can catch fire if overloaded.

Really that multimeter is a turd. Ideally it should be replaced with a decent one, long term.
Rick Law:

--- Quote from: glarsson on May 17, 2018, 11:30:35 am ---The pictured multimeter is of a class that most likely never experienced any calibration.

--- End quote ---

Actually, it probably have the ability to be calibrated.

It looks like a variation of the DT830B that I have.  There is a VR on the board for the DT830B.  I calibrated my pair of DT803B with my 5V reference from Voltage Standard.  I held pretty well too.
glarsson:

--- Quote from: Rick Law on May 18, 2018, 05:41:33 pm ---Actually, it probably have the ability to be calibrated.

--- End quote ---
Any meter can be calibrated. Just compare the displayed values to the expected values and write down the numbers on a piece of paper.
Note that calibration does not involve any adjustments of the displayed value.

This multimeter may have one or more potentiometers for adjustments, but I doubt anyone bothered with a thorough calibration.
Doctorandus_P:
It probably would have been cheaper to buy a new multimeter.
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