| Electronics > Repair |
| Please help, FLUKE 8920A Multimeter Repair |
| << < (13/45) > >> |
| Harry_22:
Let you repair it first. I would ask you to successfully complete C18 heat test to prove my Multicap simulation. |
| daisizhou:
Ok, I understand.I will wait for the fault to reappear and connect a suitable ground test point |
| daisizhou:
Hi Harry_22. I would like to ask if a real ground test point is absolutely required? I searched several locations,Due to the use of new materials, many pipes are currently made of non-metallic materials such as PVC, PPR.... There are also some old pipelines that have been severely corroded. I am not sure whether these pipelines are really connected to the earth. I plan to test the 8920a again in 12-16 hours.Do you need the TP1, R40, R41, R42, and C24 test point voltages (measured by a digital multimeter)? Also, I still use a soldering iron to bake C18 capacitors and take videos, right? |
| Harry_22:
Hi! We need only TP1 to test amplifier A offset. It should be around +8.6 volt. After you try to heat C18 and observe oscilloscope. It is expected that the line goes to zero. Please film this. Regarding grounding are you shure that there are no yellow-green connection anywhere at your location. Try to find ground bar outside your building. |
| daisizhou:
I re-tested, but unfortunately the fault did not recur. I found a ground test point though, I'm not sure if that works. If there is anything that needs improvement, please let me know. I'm still waiting for the fault to reappear and test it again. |
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