6487 nan

[galdon]

We are using labview 2011 to read a Keithely 6487 picoammeter. We get good readings for a while then suddenly Labview starts outputing NaN. It does this randomly. But once it starts it no longer outputs numbers to the screen only NaN. Right now our fix is to close restart labview. The error seems to be associated with the driver, in labview, that is for the Keithley (I think). Any ideas would be appreciated., thanks.

[galdon]

Communication is with the GPIB

[Seabass]

Hello galdon,

Did you download this instrument driver from the Keithley web site?

http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=E3B19B3E90A9659CE034080020E748...

The driver you are using is not a NI certified instrument driver. As you said, that might be the reason why you are having some trouble.

Noncertified instrument drivers typically solve a specific application need and are not usually fully functional. They are provided as is and are not supported by National Instruments.