Invalid String Data, Keithley DAQ 6510

[dueduekcue88]

Hello,

I get the following error message with the Keithley DAQ 6510.

The voltage measurement works without any problems, whereas I get the attached error when measuring the temperature. The VIs are provided drivers for the Keithley model. I have tried troubleshooting with NI IO Trace, but have not been able to figure it out. Does anyone have a tip for me?

Thank you very much.

[JensG69]

I see "Fehler", so I assume you are on a computer with German settings.

Often instruments drivers are not written for a system with a comma as the decimal point character.

Change your LabVIEW settings to NOT use the localized decimal point and try again.

Regards, Jens

[dueduekcue88]

Thanks for the quick reply. Unfortunately, it did not work. Is it possible that a LabVIew version with a different language would work?

Best regards

Özgür D.

[GerdW]

Hi Özgür,

can you debug the Keithley VIs to find the offending string, which triggers the error -151?

Once you have found the wrong command you can compare it with the description in the manual and finally correct the device driver VIs to avoid that error…

(Remark: As indicated by Jens' suggestion device drivers often fail when the computer does not use the English numeric formats. I also observed such problems regularly. And I learned to revisit device drivers as they most often don't do what I really needed…)