self-calibration of NI PCI-6036E

[beam]

I have a new NI PCI-6036E (low cost) data acquisition board. We set it up using one of the analog input channels in single-ended nonreferenced mode.

I want to acquire a voltage value which is equal to a pressure reading of the connected pressure controller.

After connecting all parts together and set up the parameters I still have an offset between the voltage value from the pressure controller (7.85 V) and the card reading (8.05 V). How can I solve this problem?

I tried to do a self-calibration of the data acquisition board using the provided online E series diagnostic utility on your web page undere: www.ni.com/support/selftest but it says "device detected but not supported". The E-series model I am using sould be supported
!?

Can I do a quick self-calibration in an other way?

It would be very nice somebody could give me some advice how to solve this problem.

Thank you very much for your help!

beam

[RIO-Todd]

Beam,

You can programmatically perform a self-calibration. In LabVIEW, you can call the E-Series Calibrate VI within the Data Acquisition>>Calibration and Configuration subpalette. If using a text-based ADE, you can call the Calibrate_E_Series NI-DAQ function.

You are right in that the PCI-6036E device should be supported by the online diagnostic utility; that should work. Make sure you have NI-DAQ 6.9 or higher and Internet Explorer 5.0 or higher.

Also, is the voltage you are reading floating or ground-referenced? If the source is floating then you should use bias resistors when configured in NRSE or differential mode. Chapter 4 of the E Series User Manual (linked below) goes over how/when to connect bias resistors. I would take a look at this chapte
r and use it as a reference for connecting signals. I hope this helps.

PCI E Series User Manual
http://digital.ni.com/manuals.nsf/webAdvsearch/06F1C9FB0D0BA5C286256C010057461B?OpenDocument&vid=niwc&node=132100_US

Regards,

Todd D.
NI Applications Engineer