Products > Test Equipment

Keithley 2400 SourceMeter review and teardown

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TiN:
Revive, revive...



Time to recalibrate my SMU. To do so in correct way, worth to spend some python-spaghetti-coding for calibration app for 2400 + 3458A.
So far both instruments talking well, ironing bugs..

Once done, it will be posted as usual  :-DMM
Not sure if anyone need this :)

ManateeMafia:
Hmmm, sounds like a good idea. :-+

TiN:
Okay, first beta sorta works.
Verification readings are not correct, but calibration is ok.



Usage is simple.

On execution it will check for GPIB:3 = HP3458A ID and GPIB:24: KI 2400 ID.
If ID matches , it will save current calibration constants of 2400 into txt file.
Then user required to connect 2400's HI/LO to DMM HI/LO.
DMM will be ACAL ALL and then DCV calibration will execute.
2400 will beep when change to current input at DMM will be needed.

Python app for Raspberry Pi + 3458A + KI2400

Calibration log TXT data

z01z:
@TiN

After seeing your teardown, I am wondering about the infamous caps. Isn't it advisable to replace the electrolytic caps here, too?

If it is not too much trouble, would you be so kind as to capture the output of your 2400 with a scope? If possible both with light (20V, 100kOhm) and heavy load (20V, 20Ohm), or whatever load resistor you have handy. I'd like to compare your results with the device I have access to, to see whether it works well or not.

Thank you in advance!

plesa:
Just bought Keithley 2410 for $300 for parts. It seems to have issues in source part.
Thanks TiN for calibration script, it will be handy after repair.
I expect some damaged transistor in source section and zener diodes. Display is quite dim, another 7001 will be harvested:)
Unit is made in 2008 and hac C27 firmware.
Pictures will follow soon.

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