Author Topic: Keithley 2001 DVM factory modifications to work with a K1801 nanovolt preamp  (Read 35782 times)

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Offline USMC_Spike

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Re: Keithley 2001 DVM factory modifications to work with a K1801 nanovolt preamp
« Reply #100 on: February 22, 2017, 02:03:10 am »
No I have not tried running it remotely via serial port.

I'm not sure How I'd do that.

If you don't mind helping, I don't know the protocol for getting one running
using the serial port.

?

 

Offline USMC_Spike

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Re: Keithley 2001 DVM factory modifications to work with a K1801 nanovolt preamp
« Reply #101 on: February 22, 2017, 03:04:51 am »
rastro,

I went through all the user and services manual that were posted at
the top of this thread...or one of the thread for the military version
of these unit with schematics.

Nothing I found addresses how to use the Digital I/O.

Yes there are many commands etc for the GPIB and IEEE interface
but no information I've found for using the Digital I/O (serial port.)

I'm all ears for anyone.


...
So I'm in limbo until I can find a good working affordable display.
Hoping that is the only problem I'll find on a former working unit.

If you have any ideas....I'm all ears.

Spike

USMC_Spike;
Have you tried running the unit remotely over the serial port?  You could then at least verify operation.  adapt-improvise-and-overcome :-+

Also I've heard UPS is notorious for flatly rejecting initial clams.  It not too much time has elapsed you may want to challenge their response.
 

Offline TheSteve

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Re: Keithley 2001 DVM factory modifications to work with a K1801 nanovolt preamp
« Reply #102 on: February 22, 2017, 03:16:32 am »
For remote communication with a K2001 you will need to use GPIB, the digital IO connector is not a serial port.
VE7FM
 

Offline USMC_Spike

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Re: Keithley 2001 DVM factory modifications to work with a K1801 nanovolt preamp
« Reply #103 on: February 22, 2017, 04:54:15 am »
Nuts.

No GPIB gear here :(  Thanks for the clarification though.
 

Offline plesa

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Re: Keithley 2001 DVM factory modifications to work with a K1801 nanovolt preamp
« Reply #104 on: February 22, 2017, 05:02:50 am »
Nuts.

No GPIB gear here :(  Thanks for the clarification though.

If you do not have GPIB adapter you can build GPIB from Arduino.
http://egirland.blogspot.cz/2014/03/arduino-uno-as-usb-to-gpib-controller.html

BTW 2001 will not work with front panel PCB disconnected (VFD can be dead).
Another alternative is to connect by any terminal to pins on VFD board.

« Last Edit: February 22, 2017, 05:06:12 am by plesa »
 

Offline rastro

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Re: Keithley 2001 DVM factory modifications to work with a K1801 nanovolt preamp
« Reply #105 on: February 22, 2017, 03:29:25 pm »
Spike - Sorry for the confusion you're right.  I was thinking of the K2000 which has both RS-232 and GPIB. 
The principal still holds that you can test the system without a display using the GPIB interface. 
 

Offline USMC_Spike

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The file is a JPG and its a wopping 2.2KB in size.

I get this message:

Well I can't paste this image either.

grrrrr.
 

Offline USMC_Spike

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Maybe the error message will show up now:

 

Offline USMC_Spike

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So, after a few more tried I am here:
at 426 KB, now less than 1/4 size.

Note the upper left side of the VFD,
that was from the impact, in the carton,
wrapped in 1 inch bubble wrap, with
packing peanuts around it.  THX UPS.


« Last Edit: March 20, 2017, 12:02:46 am by USMC_Spike »
 

Online TiN

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I think repair discussion would fit better in this K2001 repair log thread.
YouTube | Chat room | Live-cam | Have documentation to share? Upload here! No size limit, firmware dumps, photos.
 

Offline USMC_Spike

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Tin, Thank you for your suggestion.

I posted it there in the repair thread.

Anyone have any GPIB scripts?

I finally have an adapter...Prologix to USB.

But no experience with GPIB.
« Last Edit: March 20, 2017, 08:23:06 am by USMC_Spike »
 


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