10 differential thermoelement measurements with pci-6225 and scb-68 connector block

[Marc Blumentritt]

Hi,

is it possible to do 10 differential thermoelement measurements with pci-6225 and scb-68 connector block?

I read in the manual of the scb-68, that it has an internal reference sensor for cjc, which is connected via switches to channel 0. I have setup a simulated pci-6225 in MAX with scb-68 connector blocks on both connectors and activated the cjc options in the properties of the first connector block. In the manual of the DAQ M series I read, that the differential pins go from 0 to 7 (second pin is 8 to 15), then 16 to 23 (2nd pin 24 to 31) and so on. In LabVIEW I use for a first test the DAQ assistent to configure my thermoelement task. I use inputs 1 to 7 and 16 to 18 with integrated cjc source to realize 10 differential measurements. The problem is, I get an error, saying that the last three channels cannot use the integrated cjc source. Is this correct or is this an error in the DAQ assistent?

Thanks for any input.

Marc

[Marc Blumentritt]

Hi,

does no one here use a pci-6225 with a scb-68 for temperature measurement? It would be really cool, if someone could give me a hand solving my problem of measureing 10 thermoelements (differential) with this hardware.

Thanks for any help.

Marc