Siemens SITRANS T Series - Linear Resistance

Input type Min. temperature Max. temperature Min. measuring span Standard
L -200 °C +900 °C 50 °C DIN 43710
Lr -200 °C +800 °C 50 °C GOST 3044-84
N -180 °C +1300 °C 50 °C IEC 60584-1
R -50 °C +1760 °C 100 °C IEC 60584-1
S -50 °C +1760 °C 100 °C IEC 60584-1
T -200 °C +400 °C 50 °C IEC 60584-1
U -200 °C +600 °C 50 °C DIN 43710
W3 0 °C +2300 °C 100 °C ASTM E988-96
W5 0 °C +2300 °C 100 °C ASTM E988-96
Cold junction compensation (CJC)
Cold junction compensation (CJC) Constant, internal (default) or external over Pt100 or Ni100
RTD
Temperature range internal CJC -50 ... +100 °C (-58 ... +212 °F)
Connection external CJC 2-wire, 3-wire or 4-wire
External CJC, wire resistance per wire (for 3-wire and 4-wire
connections)
50 Ω
E󹪜ect of the wire resistance (with 3-wire and 4-wire connec‐
tions)
< 0.002 Ω/Ω
Input current external CJC < 0.15 mA
Temperature range external CJC -50 ... +135 °C (-58 ... +275 °F)
Cable, wire-wire capacity (CJC and thermocouple) Max. 50 nF
Total wire resistance Max. 10 kΩ
Fault detection, programmable None, short-circuited, broken
CJC: Short-circuited or broken
Note: The short-circuited fault detection only applies to the CJC input.
Fault detection time (TC) ≤ 75 ms (typically 70 ms)
Fault detection time, external CJC (for 3-wire and 4-wire) ≤ 2000 ms
12.2.6.3 Linear resistance
Linear resistance input SITRANS TH320/TR320/TF320 SITRANS TH420/TR420/TF420
Input range 0 Ω ... 100 kΩ
Min. measuring span 25 Ω
Connection type 2-wire, 3-wire or 4-wire 2-wire, 3-wire or 4-wire
Wire resistance per wire (max.) 50 Ω
Input current < 0.15 mA
E󹪜ect of the wire resistance (with 3-wire
or 4-wire connections)
< 0.002 Ω/Ω
Technical data
12.2 SITRANS TH320/TH420/TR320/TR420/TF320/TF420
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
202 Operating Instructions, 05/2020, A5E41864807-AB