Teledyne T3MIL50 User Manual page 144

Type Standard
PT-100 ITS90
Temperature Calculation
Example
144
Alpha Beta
0.003850 0.10863
Example—Calculating the resistance of a PT-100
RTD at 100˚C (T). The following R
alpha, beta, and delta values are used for the
PT-100 RTD:
T=100˚C
Ω
R ( at 0˚C) = 100
0
Alpha=0.003850
Beta=0.10863
Delta=1.49990
A, B, and C are calculated according to equations
listed above:
A=0.00391
B=5.77e-7
C=4.18e-12
The resistance of the RTD at 100
calculated as follows:
R : =R [1+AT+BT
100 0
=100{1+[(0.00391)(100)]+[(-5.77e-7)(100
+[(-4.18E-12)(100
Ω
=138.5
T3MIL Series User Manual
Delta
1.49990
( Ω
0
Ω
C (R
˚
2 3
+CT (T-100)]
3
)(100-100)]}
Ω@0˚C
100Ω
at 0˚C),
) is then
100
2
)]