Hi
I am a high school teacher and need a bit of advice.
I set the Multimeter to 600V to measure the classroom voltage of 240V. (It's not in the picture)
The fuse blew with a nice popping sound.
I have replaced the fuse.
The LCD backlight works again.
But nothing else.
I was hoping the microcontroller on the PCB is protected from voltage spikes.
I cannot see any obvious physical damage on the PCB.
My question is: Is there a way to fix the multimeter or at least attempt to do so?
Cheers.
If the fuse blew then you had the meter connected to measure current not voltage. Before making another measurement make sure you have the probes plugged in for voltage not current.
If the pink strip is the connector to the display then the display won't work with the meter in bits, try assembling it before testing it again.
If the meter is designed to measure up to 600V then it will be protected for voltages to at least 600V, probably a lot higher. However, over voltage is not the cause of your problem.
Probably true. I think the lack of burning or other damage on the board suggests (only suggests) that it has not been damaged. I look forward with interest to what @21za2323rzcvzxcv finds out.
Yes, did some damage to the car computer when testing the roof light that way.
However in this case, you will note that there is no fuse in the 10 A current measuring position, so if the fuse blew then the leads were not in the "10 A" position and if they were, then any possible damage would primarily be limited to the PCB itself in the bottom right section.
Can you post a photo of the meter with the cover on that includes the entire meter
and does not crop the bottom half so we can see all the printing on the cover ?
Can you also describe how you had the leads connected and how the knob was
set ?
If this is the same Plusivo meter I found online, the mA connection is the same as the Voltage connection (with a separate 10A connection). That's a bad design because if you rotate the selector switch through the current ranges while connected to voltage source you'll burn something up!
P.S.
Actually, that's shown in the photo of the PC board.... Bad design!
