Author Topic: I have repaired a Keithley 610C Electrometer and made a video  (Read 2559 times)

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Offline baltersice

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I have repaired a Keithley 610C Electrometer and made a video
« on: December 05, 2016, 02:37:02 pm »
The fault was extremely simple in the end, not even worth a video.
But the footage was too good for the trash, so this came out:


I got that meter for roughly 30$ from eBay, perfect condition but non-functional.
The first thing I checked was the discrete amplifier module, where a diode had shorted.
 
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Offline HighVoltage

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Re: I have repaired a Keithley 610C Electrometer and made a video
« Reply #1 on: December 05, 2016, 08:12:13 pm »
Very nice presentation of this repair.
Thank you for sharing.
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Offline dacman

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Re: I have repaired a Keithley 610C Electrometer and made a video
« Reply #2 on: December 06, 2016, 12:12:23 am »
Nice video.  Something I noticed was the rear output switch was set to 1 MA.  The 1 MA / 3 V switch on the back is supposed to be set to 3 V if the output isn't connected to a 1 MA recorder.  There is a note about this in section 2-1 of the 610C manual.
 

Offline The_Penguin

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Re: I have repaired a Keithley 610C Electrometer and made a video
« Reply #3 on: December 06, 2016, 12:26:34 am »
Awesome video. The intro was almost pornographic.
The build quality, and looks as clean as the day it was made. Wow.
« Last Edit: December 06, 2016, 12:28:43 am by The_Penguin »
 

Online Vgkid

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Re: I have repaired a Keithley 610C Electrometer and made a video
« Reply #4 on: December 06, 2016, 04:13:25 am »
Nice job on the fix. Always wanted an electronometer to mess around with, but wouldn't have much use for it.
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Offline Johnny10

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Re: I have repaired a Keithley 610C Electrometer and made a video
« Reply #5 on: December 06, 2016, 03:12:56 pm »
Liked your video.
I bought a Keithley Model 210 Vacuum Tube Electrometer this summer at a yard sale.
Needs a lot of work and I believe a few almost unavailable accessories to operate properly.

Hope to get to this early next year.
Tek TDS7104, DMM4050, HP 3561A, Tek 2465A, HP8903B, DSA602A, Tek 7854, 7834, HP3457A, Tek 575, 576, 577 Curve Tracers, Datron 4000, Datron 4000A, Fluke 181 Nanovoltmeter, Dos4Ever uTracer, HP5335A, EIP534B 20GHz Frequency Counter, TrueTime Rubidium, Sencore LC102, Tek TG506, TG501, SG503, 1062LS101
 

Offline Cyberdragon

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Re: I have repaired a Keithley 610C Electrometer and made a video
« Reply #6 on: December 06, 2016, 06:54:17 pm »
What accessories? It's just a special voltmeter isn't it? If it needs some sort of attenuated probes you could probably just make some.
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Offline quarks

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Re: I have repaired a Keithley 610C Electrometer and made a video
« Reply #7 on: December 06, 2016, 07:05:44 pm »
very nice :-+
 

Offline Johnny10

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Re: I have repaired a Keithley 610C Electrometer and made a video
« Reply #8 on: December 06, 2016, 08:50:43 pm »
Accessories to make it more complete; Ohms, Amps, High Voltage
Tek TDS7104, DMM4050, HP 3561A, Tek 2465A, HP8903B, DSA602A, Tek 7854, 7834, HP3457A, Tek 575, 576, 577 Curve Tracers, Datron 4000, Datron 4000A, Fluke 181 Nanovoltmeter, Dos4Ever uTracer, HP5335A, EIP534B 20GHz Frequency Counter, TrueTime Rubidium, Sencore LC102, Tek TG506, TG501, SG503, 1062LS101
 

Offline lowimpedance

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Re: I have repaired a Keithley 610C Electrometer and made a video
« Reply #9 on: December 07, 2016, 01:21:46 am »
That is indeed an oldie, :), whats the odds of ever finding any of those accessories I wonder !.
Good luck with the restoration.
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Offline VintageNut

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Re: I have repaired a Keithley 610C Electrometer and made a video
« Reply #10 on: December 10, 2016, 03:44:17 pm »
Accessories to make it more complete; Ohms, Amps, High Voltage

There is a shunt for the model 200 on eBay. Not sure if this is a drop in for the model 210.

http://www.ebay.com/itm/Keithley-2001-ElectroMeter-Shunt-for-200-Vacuum-Tube-Electrometer-Priority-SH-/232162654709?hash=item360df8f9f5:g:kzIAAOSwl9BWK3~3

You applications posting is very cool. I have an original model 210 paper manual. The manual was produced in September 1957.
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Offline schopi68

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Re: I have repaired a Keithley 610C Electrometer and made a video
« Reply #11 on: December 30, 2016, 02:54:34 pm »
Just to metion: replacing the transistor in diode configuration with an standard diode does not complete the repair work.
A diode-connected transistor has a very low reverse leakage current (what is an important aspect in applications with high input impedance).  ;)
 


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