#30 - Keithley 614 electrometer repair and calibration

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Күн бұрын

Пікірлер: 29

@clints8771 8 жыл бұрын

This is a great video. I just noticed someone over on the EEV Blog Forum is looking for someone familiar with this unit. I suggested your video. Keep them coming!

@Spirit532 7 жыл бұрын

Small tip regarding shielding: You probably made a much bigger difference by using black heatshrink than you would by touching the teflon with greasy fingers. The black pigment in the heatshrink is carbon-based and is therefore slightly conductive. Not enough to cause any problems in almost any situation except something extreme like an electrometer. Use white, or better, clear heatshrink next time, they have a much higher dielectric strength and lower conductivity.

@feedback-loop 7 жыл бұрын

Thanks. I appreciate your comment.

@MrMac5150 9 жыл бұрын

These type of videos are the best, lets do more troubleshooting and repair. Thank You so much.

@PelDaddy 8 жыл бұрын

Nice job. I have been bitten by those silly old gang switches before. Can't complain too much, though. I got a $100 off a Keithley bench meter because it did not work right in current mode. I took it apart and found it was the front/rear input switch. A little contact cleaner and she was as good as new! Nice work on the front input.

@tonybell1597 8 жыл бұрын

Thank you for posting these videos, learning so much about repair and troubleshooting.... Excellent way to get cheap test gear!

@KerryWongBlog 9 жыл бұрын

I have one 614 as well. I got a Pomona 4725 2-lug triax to alligator cable for it and it worked well. BTW, due to the extreme high input impedance, typical heat shrink is probably not ideal, especially if the environment humidity is high. Great video!

@feedback-loop 9 жыл бұрын

+Kerry Wong What kind of heat shrink would you propose? Do you think Keithley used some special kind? Thanks for watching and for your opinion.

@KerryWongBlog 9 жыл бұрын

+FeedbackLoop Typically, the heat shrink material for these kind of extremely high input impedance probes is PTFE.

@ashpowell9451 8 жыл бұрын

Very good. Those style switches seem to be a common source of problems with this brand and era. I watched another video earlier (EEVBlog) and they found the same symptoms and cause.

@xDevscom_EE 9 жыл бұрын

Nice job on restoring good ol Keithley!

@Steve3dot1416 6 жыл бұрын

From all the repair videos on youtube, yours are the best ones. I am happy to have been able to find your channel. Continue the great work. If you happen to be on patreon, I would be happy to provide.

@feedback-loop 6 жыл бұрын

Thank you. I have not explored the Patreon option yet. As I understand, I will have to register a company and turn this channel into a business, but I am not sure. Perhaps, one day I will figure out the details, if this channel gets very popular.

@Steve3dot1416 6 жыл бұрын

I am sure it will. Looking forward for your next videos. In the meantime, I listen to each one of your old videos. As you see, I am at two years old videos now. As for patreon, Mr. Carlson's Labs get $4000 a month with 80K subscrivers! Even if you make only $200 with 3K subscribers, I think it would be a good thing to look at it further.

@charlenextan 3 жыл бұрын

Hi, do you have a photo/video/image of the detailed “zero check” loop? My copper piece broken. Do you know where can I buy the copper( gold plated?) replacement piece?

@paulevans8278 4 жыл бұрын

I enjoyed your video. I have one that trying to troubleshoot. All positive voltages are ok. Negative voltage on 2V and 20V range are out of spec. Have you experienced this? Thanks.