GPIB, can't find instrument

Hello group,
I have a question about my GPIB interface that failed to recognize a device.
I'd love to describe the problem here and am very willing to hear your
suggestions.
I work in a lab. I used LabVIEW to write a program to communicate with a
multimeter. The program has been working very well in the past two years.
Now I want to add some function to my program so that I can control a
temperature controller at the same time as I control the multimeter. So I
connected the temperature controller to the GPIB cable of the multimeter and
asked the GPIB getting started program to scan for the new instruments.
Surprisingly, an error message saying " Scans for instruments failed because
it didn't find any instrument.". That is to say, both the mu
ltimeter and the
temperature controller can't be seen. I checked all the connections and they
are all firm. I then tried to restart the computer, reinstall the GPIB
interface, change another GPIB cable. But the problem persists.
I am now guessing that the GPIB interface of the temperature controller does
not work--it has not been used since day one so we are not sure if it came
this way or just gets "rusted" in the years in our lab. Before returning the
temperature controller to factory for a check, I wonder if any expert here
could give me some suggestions on what to try. Thanks!
Regards,
Fan Zhang

Ian thanks for your suggestion. It does come with a RS232 interface. So if
the GPIB port really does not work, I would be able to talk to the
instrument via it.
The temperature controller is a bit old. It is a LakeShore product that was
bought probably 10 years ago. You are right. The interface can be changed in
front panel. And it was set to be GPIB when I was trying to detect it. So it
is unlikely it is the reason. Thank you though!
Fan
"ian.f" wrote in message
news:[email protected]..
> hi,
>
> I am not sure sure about temp. controller but does it come with RS232
> interface as well? Like some of the multimeters (i.e. Agilent 34401A),
> they come with the option for either RS232 or GPIB interface.
>
> If it does, you might wanna check if it is set to as GPIB interface.
>
> Good luck to u.

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old pc.JPG ‏194 KB

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GPIB, can't find instrument

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