SCB-68 and PCI-6281

[mlwalter77]

I am using the PCI-6281 with a SCB-68.  I have set the dip switches for Temperature Sensor Enabled, set the properties in MAX as well.  The problem I am getting is that when I go to set the CJC type on a measurement task to Built In, it gives me an error and says that only constant and channel are valid types for the CJC.  I'm a little new to the analog DAQ so any help I could get would be greatly appreciated.

[Brooks_C]

Hello mlwalter77,

I can think of a couple of things that could cause this error.  The first issue is that you cannot use analog input 0 (ai0) if you're using the SCB-68.  This line is reserved for the CJC.  If you're trying to read the temperature on ai0 this is likely the problem.  The second cause could be that the PCI-6281 is not configured to enable temperature sensing.  Here's how to change this:

1.  Open up the Measurement and Automation Explorer (MAX).

2.  Navigate to My System>> Devices and Interfaces>> DAQmx Devices>> PCI-6281.

3.  Right click on the PCI-6281 and select Properties.

4.  Go to the Accessories tab of the Device Properties window, select the SCB-68 as the accessory, and click configure.

5.  In the Accessory Configuration windows check Temperature Reference Enabled.

Here's a screenshot of steps 3 to 5:

I hope this helps, and have a great day!

Cheers,

Message Edited by Brooks_C on 03-25-2008 01:34 PM