| Products > Test Equipment |
| Restoring / Repairing an old Fluke 8000A |
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| vinlove:
I just got an old vintage 8000A, and it is in pretty poor condition. It looks like it had real hard life, and then stored in rough environment for long time. When powered on, it has following problems. 1. Display comes on, but numbers just change itself all day long. It is not responding to the probes. Sometimes it tries to, but soon it goes back to meaningless random number display. When different modes are selected, it doesn't respond on the LED display, again it just keeps displaying its own random numbers or does countdowns or count ups. 2. The buttons get sticky, and when DCV is selected, Kohm must pops out, but i doesn't. It just get stuck in there, so its like 2x buttons are selected. This meter would be real cool if it works properly, because it can read up to 1200ACV. Not many modern DMMs can do that. And it is darn useful to work on the tube amp or tube gears with HV. What should be done first? I mean is full recapping necessary? I just want to get it working with reasonable accuracy. |
| joeqsmith:
Besides getting the manual, grabbing the scope and another meter and start plugging away, hard to say. The following may be of interest if you ever get it working: https://www.eevblog.com/forum/testgear/strange-behavior-while-calibrating-a-fluke-8000a/msg2384277/#msg2384277 |
| vinlove:
Thanks for the link. Will investigate. |
| NoisyBoy:
That was my meter in that thread, Joe has always been tremendous help and a wealth of knowledge on the 8000A. I am always grateful for his help on the meter. In my case, the meter was working, I just tried to calibrate it and improve its accuracy. In your case, you need to first restore it to a working state, go download the owner manual, start with the troubleshooting guide in Table 4-4 and see what you find. There are a lot of mechanical switch in the 8000A, if it was not stored correctly, you could have some contact corrosion issues as well. Good luck, mine has been extremely reliable, but I would always be cautious in using such an old meter in high voltage work. Mine never test anything above line voltage. |
| joeqsmith:
--- Quote from: NoisyBoy on January 11, 2020, 04:36:44 pm ---That was my meter in that thread, Joe has always been tremendous help and a wealth of knowledge on the 8000A. I am always grateful for his help on the meter. In my case, the meter was working, I just tried to calibrate it and improve its accuracy. In your case, you need to first restore it to a working state, go download the owner manual, start with the troubleshooting guide in Table 4-4 and see what you find. There are a lot of mechanical switch in the 8000A, if it was not stored correctly, you could have some contact corrosion issues as well. Good luck, mine has been extremely reliable, but I would always be cautious in using such an old meter in high voltage work. Mine never test anything above line voltage. --- End quote --- Looks like windsmurf fell into one of the forum's political traps. :-DD Seems we loose a lot of good members in these shit shows but at the same time they seem to be at least as popular on this site as electronics. Did you ever find/start working on the second one? --- Quote from: vinlove on January 11, 2020, 01:03:19 am ---I just got an old vintage 8000A, and it is in pretty poor condition. It looks like it had real hard life, and then stored in rough environment for long time. --- End quote --- If you can, post a few clear pictures of it. Both the outside case and the inside. |
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