Need assistance calibrating a NI 9214 module.

Question

I am attempting to perform a calibration of a NI 9214 module, as per the instructions in the NI 9214 Calibration Procedure.  All calibration equipment is as per recommendation, with the exception of the calibrator, which is a Fluke 5700A (Fluke 5520A is the recommended model).  I have the cDAQ-9178 chassis setup per the procedure document.  Using LabVIEW 2014 SP1, NI-DAQmx 14.5, and most recent IVI drivers.
My VI has successfully read the TC channel voltages, all of which are within the published specs.  The problem I have is with the CJCs.  Outputting the calibration resistances as per the procedure, and using an AI Voltage task to make measurements and converting to resistance as per the equation given in the document, instead of 1000, 19000 and 100000 ohms, I am measuring about 680, 3280 and 3900 ohms (as converted from measured voltages).  This is consistent from trial to trial, in both high speed and high resolution modes, and across NI 9214 modules (I have seven).  There is nothing obvious in the code or calibrator setup that would indicate a problem.
Anything else to check or modify?  I can't figure this out.
Sean
 

Answer 1

So I made the code change to explicitly read the desired number of samples versus the contents of the buffer, but that did not change the behaviour.  If NI has successfully tested a calibration using the Fluke 5700A, I would be very appreciative if you could share the code you used.  I am still reading nonsense resistance values out.  Also, two-wire compensation does not seem to be allowed on the calibrator when using resistances of 100 kOhm or greater, which the calibration procedure does not address.  Interestingly, our in-house calibration lab attempted a calibration of the NI 9214 using NI Calibration Executive, and ran into a similar problem.  Has this combination indeed been tested successfully, and if so, what code / VI was used?
Sean