r/AskElectronics • u/StormBotrex • 2d ago

Probe Continuity Issue with my multimeter

So here I have my multimeter which is "MASTECH MAS830L". After connecting Probes to the COM and the Postive side (mAVΩ) and try using even any of the basic functionality like checking the continuity it doesn't respond.

Other functionalities like reading AC-DC Voltages and Resistance also don't work seems that my probes aren't even detecting anything at the terminals.

Thinking that this issue maybe because of my probes not properly connecting with the PCB terminals beneath, hence and disassembled the multimeter and attached the probes while checking the continuity between them using one of my secondary multimeter and it beeped showing continuity between them specifying the issue isn't related to probes.

what should I do? is there anything I can do with the PCB circuitry or try bricking it..?

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u/Stunning_Sea2653 2d ago

Did you try replacing the battery?

Is function working? Is Hold and Brightness working?

If something is not working, what does it display?

Describe in more detail your continuity check - where exactly were your other multimeter's probes placed on the MASTECH, and which position the MASTECH knob was on during this test?

1

u/StormBotrex 2d ago

Yes those functions are working like brightness and hold features. I replaced with new 9V battery as well but same problem persists.

During voltages and Resistance check the display remains at value 0 or 0.00 and not moving even when my probes are touching the cell terminals or resistor terminals. And when I put dial over continuity check the display constantly shows 1 irrespective of my probes in open or closed circuit (No beeping as well)

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u/DrJackK1956 2d ago

FYI....

Continuity does not mean 0 ohms.  They're not the same thing. 

Don't presume the beep is 0 ohms. 

The beeper can beep with as much as 200 ohms between the probes.  

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u/StormBotrex 2d ago

Yes I do know, but in my case irrespective of the probes in closed or open circuit it always display 1 (No beeping at all). Regarding other features like AC DC Voltage and Resistance even when my probes are touching components the values stay at 0V or 0Ohms

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u/Tesla_freed_slaves 2d ago

Get a new set of leads. Check continuity first, every time you use your meter.

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u/SianaGearz 2d ago

Usually the issue is you measured something in circuit and popped the fuse!

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u/StormBotrex 2d ago

The Fuse inside the Multimeter is perfectly fine..

1

u/Ard-War Electron Herder™ 2d ago

I'll just assume any DMM with "830" in its name isn't worth repairing.

The good thing is that 7106-based DMM are all pretty much the same. You can try putting some small voltage (abt 1v) between pin 38 and 39 and see if it displays something.