Greetings,
You can find more information on the following two websites:
http://zone.ni.com/devzone/conceptd.nsf/webmain/806355D26B7378B1862567EE0003A842?opendocument#2
http://zone.ni.com/devzone/conceptd.nsf/webmain/0C3E2A48D9870E3586256D8F006CE0A9
In general, the PCI-6024e by itself is not ideal for measuring temperature. You need to add some signal conditioning to properly amplify the signal and attain the best resolution. The other option is to use a 16 bit DAQ board.
Regards,
AnujD.