But why is the 9th channel in Kelvin? Some of the other Fp-TC-120 range units are in celcius.

[Mark10017]

I have (so far) 2 Fp-TC-120's that are reading units of Kelin rather than celcius. What is different about these fp modules? All FP's are operationing successfully in field point explorer. When we start writing vi's, will the different range effect the way labview handles the data? Is there something we should know about in relation to the differences between units?
Regards Mark

[Aaron_G]

Mark,

The 9th channel is the CJC sensor channel and can be configured to provide the data in C, K or F. To change the range of the channel, right click on the FP-TC-120 and choose Edit This Device. Then click on Chanel Configuration. In the upper left corner, you will see a drop box with the text "Type 1: Analog Input", change the drop box to list "Type 2: Analog Input". You can now configure the range and attributes of the CJC channel.

From a LabVIEW perspective, there is no real difference in how the data is handled, just in how it is scaled. The FieldPoint VI's return data to a LabVIEW (or any other application) as scaled units. Thus if you have one FP-TC-120 (at 25 C) with the CJC set to K and a second FP-TC-120 with the CJC set to C, you will see a v
alue of 298 K from the first and 25 C from the second.

Note 1: "Type 1: Analog Input" corresponds to channels 0-7 of the FP-TC-120 and "Type 2: Analog Input" corresponds to channel 8 of the FP-TC-120. This can vary from module to module.

Note 2: The Thermocouple input channels (0-7), can be configured for C, F, K or V.

Regards,
Aaron

[Mark10017]

Hi Aaron, thanks for the info, I'm out of the lab, but I'll check out your FP settings suggestion tommorrow.
Regards, Mark