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| Brymen BM235 InEr issue |
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| Sebaxtian:
Hello! I have a Brymen BM235 multimeter that worked very well for over 5 years, but as of lately I keep getting InEr error and beep from multimeter even when the probes are not connected. I saw here some threads where it says that is an issue with the firmware, where if you put the switch in Auto LoZ and then quickly move it to another position, the message InEr appears for a second. Mine does this also but the InEr message appears even if i move the switch from Off position to Volts or Ohms. It stays for a second and that's it. I thought it's a problem with the traces on the board and opened it up and checked. The board was a little dirty, I cleaned it with alcohol and greased the traces. I put the board back and after powering it up, I had InEr error message displayed on every position of the switch, with the probes disconnected. After a few cycles of power up and shut down, the error disappeared and hasn't come up since then. I made a photo of the board and uploaded it here. You can see there are two traces that have the green paint washed off of them. Could this be the problem and if it is, how can I fix it? Thank you. |
| sonpul:
If you put the selector on A ; mA or uA is also displayed by InEr? If yes, then you need to check the sockets, in them the contact is divided into two independent parts, a short circuit or leakage is possible. |
| Sebaxtian:
Thank you for the reply. The InEr message and beep was present on all positions of the switch, but like I said, after a few On/Off switches, it went back to normal. I also cleaned the sockets and checked them for short-circuit and they are fine. The multimeter works now and the issue didn't manifest itself. But I wonder what caused the issue and maybe there are users here that had this problem and find a fix for it. |
| Sebaxtian:
This is a closeup of the traces where the green paint is faded |
| Fungus:
--- Quote from: Sebaxtian on July 28, 2024, 01:37:09 pm ---This is a closeup of the traces where the green paint is faded --- End quote --- Calling joesmith... Are they they really relying on solder mask to prevent the switch from making contact? That doesn't seem believable to me. |
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