bad temp readings when sc2345 connetor fully inserted into chasis

[Horton]

I get bad temp readings when daq cable is fully inserted into "New" SC2345 chassis in LabVIEW, but in NImax numbers apear to be good.  When cable is partialy inserted numbers seem to be ok all around. I have tried an identicale cable and dac card (DAQCard-6062E) on same laptop and got same error. If i hook up to an older SC2345 chasis the problem is not there. I have also hooked up a PC with a PCI-MIO-16E-4  daq card and the appropriate cable for this card and have no problems on the "New" SC2345.

[Paul_C.]

Hi Horton,

Would you explain maybe a little more what you mean by bad temp readings?  You also mentioned that you were able to get this working fine in Measurement and Automation Explorer (MAX).  What type of code were you using in LabVIEW to get these readings?  I would recommend trying just a DAQ Assistant in LabVIEW and verifying that you are getting bad readings with the same type of task you were using in MAX.  If you can get this working with the DAQ Assistant, you can right-click on a DAQ assistant and generate the DAQmx code.  I also wanted to verify if you were you using the same cable with the PCI-MIO-16E-4 as you were the DAQCard-6062E.  In addition, I would inspect the cable on both the DAQCard-6062E and the SC2345 and verify that there are no bent pins.

I hope this helps,
Paul C.

[Horton]

	OLD EQ PC	NEW EQ PC	OLD EQ LT	NEW EQ LT
TEMP	81.6	87.7	81.2	86.8
TEMP V	-0.000049	-0.000320	-0.000049	-0.000322
CJC TEMP	83.5	101.7	83.7	101.9
CJC V	1.093750	0.847500	1.093750	0.846100
Temp LV	81.6	87.6	64.7	36.5
REF TEMP	82.6	82.6	82.3	82.0

Temp (Temperature in max), Temp V (Temperature voltage in max), CJC Temp (CJC temperature in max), CJC V (CJC Voltage in max), Temp LV (Temperature in LabVIEW application)

Refrence temp was with an Omega Hand held unit.

Old EQ PC (Old SC2345 chasis with PCI-MIO-16E-4 Daq card and P/N 184749C-10 (10 meter cable)  PC)

New EQ PC (New SC2345 chasis with PCI-MIO-16E-4 Daq card and P/N 184749C-10 (10 meter cable) PC)

Old EQ LT (Old SC2345 chasis with DAQCard-6062E Daq card and P/N 192061B-02 (2 meter cable) Lap Top)

New EQ LT (New SC2345 chasis with DAQCard-6062E Daq card and P/N 192061B-02 (2 meter cable) Lap Top)

There are no bent pins on any of the componets. 

The LabVIEW application and daq settings are identicle.

The same CJC Map was used for all test.

Thanks in advance for any help you can give.

Travis

[Horton]

	OLD EQ PC	NEW EQ PC	OLD EQ LT	NEW EQ LT
TEMP	72.6	74.1	72.1	74.3
TEMP V	-0.000049	-0.000049	-0.000049	-0.000049
CJC TEMP	75.6	77.0	75.3	77.7
CJC V	1.210938	1.190430	1.217285	1.178223
Temp LV	72.6	74.1	59.8	28.8
REF TEMP	73.8	73.3	73.5	73.5

Above are readings after adjusting turn pot on temp module to match temp voltage on new SC2345 chassis.

[Paul_C.]

Hi Travis,

I have a few more questions.  First off, were these tests done with the cable fully inserted into the DAQ cards?  Secondly, could you post a screenshot of a small reproduction of the LabVIEW code you're using to get these readings?  It looks like you're happy with the values from MAX, but the LabVIEW code is giving you the problems.  Please correct me if I'm wrong.  In addition, could you post the exact SCC module you're using along with the SCC power module you're using with the SC-2345?  From the information you have given me, I feel there must be something different in the LabVIEW code you're using from the task you have created in MAX.  Did you try my suggestion of using a DAQ assistant in LabVIEW?

Thanks,
Paul C.