| Electronics > Repair |
| Please help, FLUKE 8920A Multimeter Repair |
| << < (27/45) > >> |
| daisizhou:
I tested it again. |
| Harry_22:
Well done! Is it possible to reduce the level to see the clear sinus? If not please use 10k. |
| daisizhou:
--- Quote from: Harry_22 on June 10, 2024, 09:43:53 am ---Well done! Is it possible to reduce the level to see the clear sinus? If not please use 10k. --- End quote --- clear sinus?I don't understand what you're saying.What do you need to observe carefully? Can I change the resistor to 10K and test it again? |
| Harry_22:
Yes. Now we see clipped signal and I can't calculate amplification factor. Could you try to set the level to see sinus on your screen without any clipping. Seems I found out the malfunction reason. The operational amplifier has very high gain. My Microcap shows the same surprisingly. |
| Harry_22:
Measure the voltage at following points A and B. |
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