Author Topic: Keithley 182 repair  (Read 451 times)

0 Members and 1 Guest are viewing this topic.

Offline Henrik_V

  • Regular Contributor
  • *
  • Posts: 111
  • Country: de
  • “ground” is a convenient fantasy
Keithley 182 repair
« on: August 29, 2019, 10:54:57 am »
Just got a defect Keithley 182 (with connector :) ).
Some docs taped to it say it was last tested 2006 and the display isn't working due to a power supply (5VAC,60VDC) failure. Added was the remark, that this supply block isn't awailable by Keithley anymore (only the hole board) . Seems to be used in many Keithley 2k products however ...
Build a new one (https://dev.xdevs.com/issues/858) or try to find a used one? 

Since it's said for these instruments to generally recap it, I  now ask myself: Give it try to check the display power block or recap first?

Would be a nice thing to measure a 732 against the 5700 ...
Greetings from Germany
Henrik

The number you have dialed is imaginary, please turn your phone 90° and dial again!
 

Offline Ordinaryman1971

  • Frequent Contributor
  • **
  • Posts: 298
  • Country: us
Re: Keithley 182 repair
« Reply #1 on: August 29, 2019, 01:11:39 pm »
So, I guess you've confirmed that the described failures are truth?
Would be nice to have a good one to stare and compare.
 

Offline Henrik_V

  • Regular Contributor
  • *
  • Posts: 111
  • Country: de
  • “ground” is a convenient fantasy
Re: Keithley 182 repair
« Reply #2 on: August 29, 2019, 02:16:27 pm »
Found this post
https://www.eevblog.com/forum/chat/what-did-you-buy-today-post-your-latest-purchase!/msg1971725/#msg1971725

Seems one way of fixing it :) 

Runnig it without recap and try the GPIB for readout ..  some risk .. looks like this thing hasn't been powered for more than 12 years ... better wear safety glasses 8)
Greetings from Germany
Henrik

The number you have dialed is imaginary, please turn your phone 90° and dial again!
 

Online Kleinstein

  • Super Contributor
  • ***
  • Posts: 8038
  • Country: de
Re: Keithley 182 repair
« Reply #3 on: August 29, 2019, 05:31:58 pm »
If in doubt, like an instrument that was not powered for a very long time, one could start slow with a variac or with a incandescent lamp in series.
This would give the caps a little more chance to reform without exploding.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf