Cannot read complete buffer on keithley 6485

[M_Mario_M]

Hi,

I am trying to take measurements using a Keithley 6485. The vi configures the instrument to take 2500 points and save them in the internal buffer. The configuration is ok and it records as requested but when I try to retrieve the data from the internal buffer a big chuck of it goes missing. This only seems to be a problem when I set the buffer size to be greater than 1000 points.
I also get a timeout error from the event handler (wait for RQS) when the buffer size is greater than 1000 points. Error code ~ 1073807339.

I have tried increasing the timeout and byte count to no avail.

 
Suggestions will be greatly appreciated.
~Mariano

[Dennis_Knutson]

I would suggest that you debug the SCPI commands in MAX and make use of the ERR? query and do a query of the actual points in the buffer.

[Dennis_Knutson]

I would suggest that you debug the SCPI commands in MAX and make use of the ERR? query and do a query of the actual points in the buffer.

[M_Mario_M · Accepted solution]

Hi Dennis,

Thank you for the suggestion. I found that I had some minor issues on the SCPI code by using the NIvisaic in MAX. I also added a timout property node to the vi rather than setting it directly onto the RQS handler vi.

~Mariano