HP 6038A constant current

[ahamel]

Whenever I use close.vi (which was included with the instrument drivers), the power supply's voltage immediately drops and the CC LED lights up.  If I decide to not use close.vi, there is a minute delay before the same behavior occurs. 

Does anyone know what may be causing this? 

[Dennis_Knutson]

There are multiple drivers for the instrument. Provide the actual one that you are using.

[ahamel]

I have included my VI, in which I run a simple Read then Write test.  This VI uses Set Voltage/Current.vi and Read Output Voltage/Current.vi

[Dennis_Knutson]

That VI does not call a 'Close' function and I still have no idea which driver you are using so that I can check it.

It appears that you are not using the latest driver because I did download the project style driver and your funcion names are different.

[ahamel]

I got rid of the close function since either way, the behavior still occured.

The drivers I have are hp66xxa.  I didn't realize there was another set of drivers. 

I run in CC issues while still running the test with this set of drivers.  

Message Edited by ahamel on 11-18-2009 01:10 PM

[Dennis_Knutson]

There are 3 drivers. You should be able to provide the details on the one you actually downloaded but by preocess of elimination, I figured it out. If there is a next time, provide the details.

I don't see anything in the code that would reprogram the supply when you stopped the program. I'm unsure what the CC light indicates.

Why don't you run an NI-Spy capture?

[ahamel]

The CC light indicates constant current. It's not a huge problem, but rather inconvenient, that I have to restart the instrument after every test instead of just resetting to the initial value.  

As far as I can tell, I can set and read the voltage just fine as long as they are separate VIs.  Once they are together in the case structure, the CC problem occcurs.  

I can't run a NI-Spy capture.  Could this be because I am still using the demo version?

[Dennis_Knutson]

Not sure why you can't run NI-Spy. You are using GPIB aren't you? Is it an NI GPIB controller?

[ahamel]

Yes, I am using GPIB. I have a GPIB-LAN gateway that I use in order to communicate with the instrument. 

[pflores]

Why do you say you cannot run NI Spy? Here is a helpful KnowledgeBase on how to perform a good NI Spy capture.

Which step is giving you trouble?