Siemens SIMATIC ET 200AL - Page 1435

Thermocouples
5.1 Selecting thermocouples
Analog value processing
78 Function Manual, 06/2014, A5E03461439-AC
Type and temperature range
The different thermocouple types are derived from different material compositions.
Note
Due to
physical conditions, thermocouples are extremely inaccurate outside the specified
temperature range. Only use thermocouple in the temperature range specified by the
manufacturer.
The following table lists the types and material compositions, as well as the temperature
measuring range of different thermocouples:
Type
Material composition
Temperature range
B
PtRh-PtRh
250 to 1820 °C
C
W-Re
0 to 2315 °C
E
NiCr-CuNi
-270 to 1000 °C
J
Fe-CuNi
-210 to 1200 °C
K
NiCr-Ni
-270 to 1372 °C
L
Fe-CuNi
-200 to 900 °C
N
NiCrSi-NiSi
-270 to 1300 °C
R
PtRh-Pt (Pt 13%)
- 50 to 1769 °C
S
PtRh-Pt (Pt 10%)
-50 to 1769 °C
T
Cu-CuNi -270 to 400 °C
U
Cu-CuNi
-200 to 600 °C
TXK/XKL
NiCr-CuCr -200 to 800 °C