User's Manual

File : CS-SUP-MUTI-WTHERMSPETEC-E02.sxw
The relationship T = f(R) must therefore be calculated according to the relationship provided in standard
EN60751.
The following polynomial is used:
T = C
7
.R
7
+ C
6
.R
6
+ C
5
.R
5
+ C
4
.R
4
+ C
3
.R
3
+ C
2
.R
2
+ C
1
.R + C
0
where C
7
, C
6
, C
5
, C
4
, C
3
, C
2
, C
1
, and C
0
are the parameters to be transferred to the radio module
The coefficients to be transferred to the radio module are based on the coefficients A,B and C (given by the
manufacturer of the PT100 or PT1000 probes) in a mathematical formula. When required, CORONIS is able
to provide a utility enabling calculation of these coefficients. There are 8 in total (coeff A to H).
They are managed with standard internal parameters read and write commands.
All coefficients are regarded by the radio module as a single parameter.
Parameters Description
0x32 Coefficients of probe 1
0x33 Coefficients of probe 2
Each parameter is composed of 8 coefficients of 32 bits (floating IEEE) with a total size of 32 bytes.
The coefficients are represented in the radio buffer during use of the parameter read/write commands as
follows:
Remark: Coeff A : C
0
Coeff E : C
4
Coeff B : C
1
Coeff F : C
5
Coeff C : C
2
Coeff G : C
6
Coeff D : C
3
Coeff H : C
7
WaveTherm module technical specifications page 16 of 31