| Electronics > Repair |
| Please help, FLUKE 8920A Multimeter Repair |
| << < (20/45) > >> |
| daisizhou:
I once again confirmed that the resistance values of 1, 2, and 3 are the same as my last measurement. If you need the voltage values of 1, 2, and 3, you need to wait for a few days, because the 8920a is in a normal state when it is turned on today. I need to wait for the fault to occur before measuring the voltage value. If you need other test points, please let me know and I will pre-mark them because the failure time is very short. |
| Harry_22:
The next time a fault occurs measure the resistance and voltage at point 3. |
| daisizhou:
Hallo. I had some free time today, so I tested the voltages at 1, 2, and 3 in normal conditions.Please note that I am referring to the normal state, which is the state where the 8920a display shows a reading of 0.01 1:10.94v 2:-1.405v 3:8.21v Especially when I tested the P3 test points, I saw that the 8920a display could easily display 700 and flicker. It seems that the P3 test point is a location that induces the "700" flicker,I don't know if it's useful, I hope to tell you and give you a clue I mean the normal state, when the multimeter red probe tests the P3 test point, 8920a shows 700 flashes |
| daisizhou:
I'll add my test observations. Under normal conditions, if you use the multimeter's red positive pole to contact test point P1,8920a displays "700" flashing,As long as the multimeter positive pole and test point 1 are separated, the flashing of "700" will immediately resume and return to the normal display state. If you put the red positive pole of the multimeter in contact with the P3 test points,Then "700" will flash. If you separate the red positive pole of the multimeter, the 8920a "700" flash will still exist and will not automatically recover. At this time, I measured TP1 and the voltage was 0.114v |
| Harry_22:
In this case look at the signal with an oscilloscope at TP1. |
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