Products > Test Equipment
Keithley 5156 EEPROM / 6517x calibration
ksilabs:
Does anybody have Keithley Model 5156 Electrometer Calibration Standard?
It is not very complex thing -- just 4 resistors and 2 capacitors in a box. I made a copy of it and I do have instruments to measure those 6 parts with more than adequate precision (Keysight B2987A Electrometer and Quadtech 1693 LCR Meter, both in calibration) but there is one unknown there -- it has a small EEPROM that tells what the actual values are.
I have two Keithley 6517A instruments that I need to calibrate. 6517A allows programming actual values into that EEPROM so it looks like an easy thing. However, the problem is it MUST recognize that 5156 is connected to it before it can program anything. The only way it can do it is by checking that EEPROM for some magic string/byte/sequence. My EEPROM is empty so it won't find that magic and tells the fixture (or "Option" -- don't remember) is not connected so it won't talk to that EEPROM.
Does anybody have that 5156 or knows what should be in that EEPROM for 6517x to recognize it as connected so I would be able to program it with my data?
picburner:
Have you seen this TiN article?
You have to go down to where he speaks of the K6517.
From what I understand there is a secret menu that, once activated, among other things allows you to initialize the eeprom so that it is seen by the instrument.
Then you will need to add the calibration values of the internal components.
ksilabs:
Thanks, will try it later tonight when I'm back at my workbench.
ksilabs:
OK, no bananas :(
6517A, firmware C05, power on with SEQ and Power Source UP, no secret menu :(
ksilabs:
OK, it is Power Source Down, not Up.
It does set 5156 as connected but INIT does nothing, returns immediately and no changes in the EEPROM.
It might be that I didn't connect it properly as connector pinout is kinda misleading (which side it is?). Re-checking it now.
Navigation
[0] Message Index
[#] Next page
Go to full version