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Electronics => Repair => Topic started by: letron77 on July 14, 2019, 02:09:56 pm

Title: Need Help for Backup Calibration Data Keithley 2015
Post by: letron77 on July 14, 2019, 02:09:56 pm
Hello everyone

I am trying to fix a 2015 Kiethley that is stuck.
Its display reads "No comm link"

Before any intervention I decide to save the firmware and files of setting
I have already read several post very interesting on this site

I bought a TLC866 II
It allowed me to back up ODD and EVEN firmware

By cons I do not know how to save the data "instrument setup and calibration constant" which is on the eeprom 24lc16b (U136)

on this page it is about the parametric data backup of a k-2001 by realizing a "DIY I2C dongle" to connect to the TLC866:

  https://www.eevblog.com/forum/testgear/restoration-glory-of-keithley-2001-dmm/msg384347/#msg384347 (https://www.eevblog.com/forum/testgear/restoration-glory-of-keithley-2001-dmm/msg384347/#msg384347)

Can someone tell me how to realize it?
Is the procedure the same on a 2001 and 2015?
Should it desolder 24lc16B?

in advance thank you for your help

Alain
Title: Re: Need Help for Backup Calibration Data Keithley 2015
Post by: Samogon on July 16, 2019, 07:54:40 am
You have to desolder it. In circuit it will play fool.
Title: Re: Need Help for Backup Calibration Data Keithley 2015
Post by: macboy on July 17, 2019, 06:36:40 pm
You have to desolder it. In circuit it will play fool.
Maybe, but maybe not.
I have read the calibration data from the I2C EEPROMs of my K2001 meters by holding the CPU in reset, and reading with a TL866. Only 3 connections needed: data, clock, ground. The CPU must be held in reset to prevent errors caused by two I2C masters on the bus.
Title: Re: Need Help for Backup Calibration Data Keithley 2015
Post by: coromonadalix on July 17, 2019, 08:24:18 pm
you have already your thread           why double posting ?

https://www.eevblog.com/forum/testgear/need-help-for-backup-calibration-data-keithley-2015/msg2549211/#msg2549211 (https://www.eevblog.com/forum/testgear/need-help-for-backup-calibration-data-keithley-2015/msg2549211/#msg2549211)



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