WIKA TR - Thermocouples

11208287.03 06/2010 GB/D/F/E
8
WIKA Operating Instructions RTDs and Thermocouples
GB
The relationship between the temperature and the electrical resistance is characterised by
polynomials, which are also dened in DIN EN 60751. Furthermore, this standard lays down the
basic values in °C stages.
Class
Temperature range
Tolerance value in °C
Wire-wound (W) Thin-lm (F)
B -196 … +600 °C -50 … +500 °C ± (0.30 + 0.0050 | t |)
1)
A -100 … +450 °C -30 … +300 °C ± (0.15 + 0.0020 | t |)
1)
AA -50 … +250 °C 0 … 150 °C ± (0.10 + 0.0017 | t |)
1)
1) | t | is the value of the temperature in °C without consideration of the sign
bold: Standard version
Resistance values and tolerance values with selected temperatures (Pt100)
Temperature
in °C
(ITS 90)
Resistance value in Ω
Class AA Class A Class B
-196 - - 19.69 ... 20.80
-100 - 60.11 ... 60.40 59.93 ... 60.58
-50 80.23 ... 80.38 80.21 ... 80.41 80.09 ... 80.52
-30 88.16 ... 88.28 88.14 ... 88.30 88.04 ... 88.40
0 99.96 ... 100.04 99.94 ... 100.06 99.88 ... 100.12
20 107.74 ... 107.85 107.72 ... 107.87 107.64 ... 107.95
100 138.40 ... 138.61 138.37 ... 138.64 138.20 ... 138.81
150 157.91 ... 157.64 157.16 ... 157.49 156.93 ... 157.72
250 193.91 ... 194.29 193.86 ... 194.33 193.54 ... 194.66
300 - 211.78 ... 212.32 211.41 ... 212.69
450 - 263.82 ... 264.53 263.31 ... 265.04
500 - - 280.04 ... 281.91
600 - - 312.65 ... 314.77
This table represents the calibration process with predened temperatures. This means if a temperature stan-
dard is available, the resistance value of the test piece must lie within the limits specied above.
3.2 Thermocouples
Sensor type
Model Recommended max. operating temperature
K (NiCr-Ni) 1200 °C
J (Fe-CuNi) 800 °C
E (NiCr-CuNi) 800 °C
T (Cu-CuNi) 400 °C
N (NiCrSi-NiSi) 1200 °C
S (Pt10% Rh-Pt) 1600 °C
R (Pt13% Rh-Pt) 1600 °C
B (Pt30% Rh-Pt6%-Rh) 1700 °C
3. Specications