FP-TB-1 and FP-TB-3 with FP-TC-120

[43chlee]

What I want to know is the different between FP-TB-1 and FP-TB-3, when using with FP-TC-120 module.
Doesn't work FP-TC-120 when using with FP-TB-01?
or low accuracy or something?
Please give me more Information.
Thank you.

[Aaron_G]

The FP-TC-120 can be used with the FP-TB-1, FP-TB-2 or FP-TB-3. Using the FP-TC-120 with a FP-TB-3 provides the highest accuracy. The FP-TB-3 is designed with isothermal construction to minimize thermal gradients across the base and increase the accuracy of the CJC sensor. The net result is that with a FP-TB-1/2 you can estimate the CJ error by taking the larger value of the heat produced by the two adjacent modules (e.g. 1 Watt for a FP-1000) and dividing it by 1 Watt/Deg Centigrade. For an FP-1000, we would calculate that our worst case CJ inaccuracy would be 1 degree Centigrade. For FP-TB-3's, you divide by 20 Watt/Deg C so the same set-up would have a worst case CJ inaccuracy of 0.05 degrees Centrigrade. The accuracy specs for the FP-TC-120 assume a CJ inaccur
acy of 0.2 degrees Centrigrade. With larger CJ inaccuracies (than the spec), the remainder of the accuracy charts should have larger values.

Regards,
Aaron