Rtd Linearization - Fluke NetDAQ 2640A User Manual

Introduction
This appendix discusses Fixed-385 and Custom-385 RTD measurements with
NetDAQ.
Fixed-385 RTD
The Fixed-385 RTD linearization uses segmented polynomials to approximate the
Callendar Van-Dusen equation for a 385 RTD. R
Logger but , , and
43760 coefficients that conform to ITS90:
= 0.00385055
= 1.49978574
= 0.10863383
The accuracy specifications of Fixed-385 measurements with a 385 RTD that
matches the above coefficients are shown in Table A-34 in Appendix A.

RTD Linearization

are fixed. These fixed coefficients are the modified DIN
Appendix D
may be specified via NetDAQ
0
D-1.
D-2.
D-1