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Electronics => Repair => Topic started by: Lightages on April 17, 2015, 10:52:40 am

Title: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Lightages on April 17, 2015, 10:52:40 am
As the subject says. I just acquired a Keithley 197 with firmware version A2. The manual I found is for version C and there are some differences. So if anyone has a PDF or scans of the manual for this model I would be grateful.
Title: Re: Anyone have a manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: TiN on April 17, 2015, 09:44:27 pm
Take a look here: http://doc.xdevs.com/doc/Keithley/ (http://doc.xdevs.com/doc/Keithley/)
If you have programmer, worth to save firmware so I could add it there too.
Title: Re: Anyone have a manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Lightages on April 18, 2015, 01:41:22 am
Thanks TiN, but it has the same documents I already have found. I guess I need to contact Keithley and see if they are friendly.
Title: Re: Anyone have a manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Lightages on April 18, 2015, 02:01:27 am
Actually, it looks like I might have found it. When I was searching specifically for the manuals and the search took me to the Keithley site I was faced with having to make an account with Keithley just to get the manual. So I didn't try any further on the Keithley site. I just went to the Keithley site from the front page and then went to support and looked for the 197. As it turns out they only require a login for the generic manual but a document which explains how to enter the calibration mode on different versions was open and freely available.
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: TiN on April 18, 2015, 05:08:57 am
Care to share?
Having login to download documentation is pure evil. That's why I downloaded all and every document and rehosted on ftp.  :-/O
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Lightages on April 18, 2015, 06:39:34 am
Yes I will share all the information I get soon. The CAL setup procedure given on the Keithley site for my model does not work. I am waiting on a reply from on how to make it work.
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Lightages on April 18, 2015, 09:51:33 am
I received a reply from Keithley, and they have no more information than what is available o their website. Unfortunately I cannot get the 197 into calibration mode. There is a "switch" , as they describe it in the instructions, internal to the box. All I can see is a three pin header with a shorting jumper.  I moved the jumper over to the other pins, but the meter does not enter the calibration mode  :-[

I do have a universal programmer, so I will read the chips inside and provide the files along with the manual.
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Smith on April 18, 2015, 03:33:04 pm
I thought some 197's had an GPIB port as an option, does yours? Most Keithley stuff can be calibrated by GPIB.
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Lightages on April 18, 2015, 03:40:57 pm
Actually I just followed the instructions again, and I was able to enter calibration mode. Mine does not have the GPIB option. I will be dumping the ROM and the CAL memory if I can find it. I am seriously impressed with a very old multimeter that is still within its 1 year accuracy spec after who knows how long since it was last calibrated.
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Smith on April 18, 2015, 05:26:12 pm
Reminds me to do so on my 199. It wasn't working when i got it do too calibration values that where lost.
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: codeboy2k on April 19, 2015, 04:35:08 am
I second that, if you can grab the 197 firmware that would be nice. I'd like to take a look at it. 

I actually have the 197A, and I'd like to get the firmware off that.  It uses the 68HC711E9, which has 12K OTP ROM embedded on the chip, and it's hard to get at the firmware due to the protections. I can wire some pins low to enable a special bootstrap mode on the chip, this causes it to jump to a factory coded boot ROM, which will configure the serial port and start downloading serial data into the RAM, and then execute it. This sounds great for loading a small program into RAM that can dump the firmware, right? Except if Keithley programmed the security bit too, then the bootstrap code will first wipe the RAM and EEPROM data, then clear the security bit, and finally configure the serial port , download serial data into RAM and execute it.  I think I would still have the firmware, just the EEPROM data is wiped.

So I can get at the 197A firmware (I think) but I might potentially sacrifice the EEPROM cal data and brick the meter.  I'm not sure I'm ready to do that yet :)
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Lightages on April 19, 2015, 02:23:23 pm
Here are the documents and my firmware dump from my meter. Remember that mine is a 197 with firmware revision A2.

http://www.astc.cl/files/Keithley197.zip (http://www.astc.cl/files/Keithley197.zip)

Oh yes, I should say that the firmware was stored on a Mitsubishi M5L2764 EPROM
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Smith on April 19, 2015, 03:20:33 pm
Would you mind putting it om TiN's FTP at http://doc.xdevs.com/contact/ (http://doc.xdevs.com/contact/) too? He is building quite a nice collection of Keithley documents and firmwares  :-+
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Lightages on April 19, 2015, 03:33:23 pm
OK! The files are being uploaded right now.
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: TiN on April 19, 2015, 10:10:48 pm
Thanks for your contribution, added!  ;)
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Lightages on April 20, 2015, 02:26:48 am
Thanks for your contribution, added!  ;)

Hmmmm, I don't see my files. The /197 directory still has the same files as before. The file 197A_RevB_DocSpec.pdf is not for the 197 of course. The specifications for the 197 are in the manual. The .lib and .zip files do not exist neither.
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: TiN on April 20, 2015, 03:00:30 am
Are you looking here? (http://doc.xdevs.com/article/keithley-instruments/#197). /doc/Keithley/197 dir have fw folder with your files already. 197A moved to it's proper dir.
197-901-01A manual is same as was posted before, so that stays unchanged.
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: Lightages on April 20, 2015, 03:04:16 am
No, I was looking at the url you provided earlier in the thread: http://doc.xdevs.com/doc/Keithley/ (http://doc.xdevs.com/doc/Keithley/)

I also just re-uploaded the calibration setting text file with a bit of clarification for firmware version A models.
Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: codeboy2k on April 20, 2015, 04:02:30 am
Thanks, Lightages for the 197 rom, I'm going to be dissecting it soon. 

@TiN:
I also used FTP and uploaded the 196 roms, since you didn't seem to have it in http://doc.xdevs.com/doc/Keithley/196 (http://doc.xdevs.com/doc/Keithley/196)
I put it in the FTP directory, under Keithley/196_Firmware
I'm not the person who extracted the rom files, the original person is in the readme


Title: Re: SOLVED manual/schematic with calibration instructions, Keithley 197 vA2?
Post by: TiN on April 20, 2015, 10:59:53 am
Site document page updated manually, while /doc/Keithley is just FTP dir, and uploaded separately. All of data is on FTP dir, it takes time to sort stuff and put on catalog document.  :-X