12-28-2022 02:29 PM
I am working on a new test fixture design that uses the DAQ973A and I am trying to read a capacitor using LabVIEW. I have downloaded the Keysight LabVIEW drivers and libraries. I am able to measure resistance and voltages without any issues but unable to read capacitance. This is the first time I have used the DAQ973A. Has anyone written any LabVIEW code for this?
12-28-2022 02:40 PM - edited 12-28-2022 02:40 PM
Well I have written lots of LabVIEW for the HP/Agilent/Keysight 3497xA that was the predecessor of the DAQ97xA series.
Out new test systems use the DAQ973, I downloaded the new DAQ97xA LabVIEW driver set and was disappointed to find they are now IVI drivers.
I have never had good luck with any IVI drivers, these included, and in the end I just used the SCPI commands and made my own drivers for the functions that I need.
I am sorry if this was not any help but it's all I got.
12-28-2022 03:27 PM
I was also disappointed by the IVI but I think I just needed an extra driver and it worked. Also wish the modules were backwards compatible since swapping all of them is a huge extra expense and hassle if you are upgrading multi-channel applications.
To your problem, which module are you using? Only a few of them handle capacitance.
Found the manual at Valuetronics: DAQ970A/DAQ973A Data Acquisition System (valuetronics.com)
12-28-2022 03:31 PM
In my configuration I have (2) of the DAQM903A's and (1) DAQM908A. From what I have read this should work.
12-29-2022 09:36 AM
Yes, your DAQM908 should be able to read capacitance. Is that what your cap is connected to? It's a simple, single-ended connection so just put a cap across channel one and try to read it.
I HIGHLY recommend that you make sure you can set up the instrument manually and get the capacitance displaying on the DMM before you try controlling it through LabVIEW/GPIB.
I've wasted plenty of time in my career looking for software bugs only to find I connected something wrong and there was no signal to measure. 😫
12-29-2022 09:39 AM
That's a good idea. I'll give it a try. Thanks
12-29-2022 12:50 PM
I have it working. I am measuring the capacitance using LabVIEW. Thanks for all of the help everyone.