Thermocouple measureent with SCB-100 board

[lp19]

Hello,

I am confused about the SCB-100 board?
Does it have electronic temperature compensation for thermocouples or does it just have a Temperature sensor???

Once we have made Virtual channels in MAX do we just screw in the thermocouple wires into the terminal board and away we go, is that how the board works??

Very confused please help.

Cheers
lp

[Nick_Storton]

Hi Ip,

You can just connect your thermocouples to the relevant terminals on the SCB-100 and then use the built in CJC thermistor device to measure the ambient temperature of the room. The transducer, used for cold junction compensation, is a thermistor. It is calibrated to match the following equation:

TC = 100 * Vt
TK = TC + 273.15
TF = (9/5 * TC) + 32

where Vt is the temperature sensor output voltage. TC, TF, and TK are the temperature readings in degrees Celsius, Fahrenheit, and Kelvin, respectively.

The SCB-100 has dip-switches that will enable the CJC. Refer to the appropriate installation guide for the correct dip-switch settings. After setting the switches, the CJC transducer is connected to Channel 0 of your data acquisition (DAQ) card. If
you are using NI-DAQ, create a virtual channel in Measurement & Automation Explorer (MAX) that reads Channel 0 to see the temperature the CJC is reading. If you are using NI-DAQmx, you create an NI-DAQmx Task instead of a virtual channel. The link below might be useful.

http://www.ni.com/pdf/manuals/320907a.pdf

Hope this helps.

Nick