iTEMP TMT162 Technische Daten
Endress+Hauser 53
Total measured error of transmitter at current output = √(Measured error digital² +
Measured error D/A²)
Sample calculation with Pt100, measuring range 0 to +200 °C (+32 to +392
°F), measured
value +200 °C (+392 °F), ambient temperature +25 °C (+77 °F), supply voltage 24 V:
Measured error digital = 0.06 °C + 0.006% * (200 °C - (-200 °C)): 0.084 °C (0.151 °F)
Measured error D/A = 0.03 % * 200 °C (360 °F) 0.06 °C (0.108 °F)
Measured error digital value (HART): 0.084 °C (0.151 °F)
Measured error analog value (current output): √(Measured error digital² +
Measured error D/A²)
0.103 °C (0.185 °F)
Sample calculation with Pt100, measuring range 0 to +200 °C (+32 to +392 °F), measured
value +200 °C (+392 °F), ambient temperature +35
°C (+95 °F), supply voltage 30 V:
Measured error digital = 0.06 °C + 0.006% * (200 °C - (-200 °C)): 0.084 °C (0.151 °F)
Measured error D/A = 0.03 % * 200 °C (360 °F) 0.06 °C (0.108 °F)
Influence of ambient temperature (digital) = (35 - 25) * (0.002% * 200 °C -
(-200 °C)), min. 0.005 °C
0.08 °C (0.144 °F)
Influence of ambient temperature (D/A) = (35 - 25) * (0.001% * 200 °C) 0.02 °C (0.036 °F)
Influence of supply voltage (digital) = (30 - 24) * (0.002% * 200 °C - (-200 °C)),
min. 0.005 °C
0.048 °C (0.086 °F)
Influence of supply voltage (D/A) = (30 - 24) * (0.001% * 200 °C) 0.012 °C (0.022 °F)
Measured error digital value (HART):
√(Measured error digital² + Influence of ambient temperature (digital)² + Influence
of supply voltage (digital)²
0.126 °C (0.227 °F)
Measured error analog value (current output):
√(Measured error digital² + Measured error D/A² + Influence of ambient
temperature (digital)² + Influence of ambient temperature (D/A)² + Influence of
supply voltage (digital)² + Influence of supply voltage (D/A)²
0.141 °C (0.254 °F)
The measured error data correspond to ±2 s (Gaussian distribution).
MV = Measured value
LRV = Lower range value of relevant sensor
Physical input measuring range of sensors
10 to 400 Ω Cu50, Cu100, polynomial RTD, Pt50, Pt100, Ni100, Ni120
10 to 2 000
Ω Pt200, Pt500, Pt1000
–20 to 100
mV Thermocouples type: A, B, C, D, E, J, K, L, N, R, S, T, U
Other measured errors apply in SIL mode.
For more detailed information please refer to the Functional Safety Manual
SD01632T/09.
Sensor adjustment Sensor-Transmitter-Matching
RTD sensors are one of the most linear temperature measuring elements. Nevertheless,
the output must be linearized. To significantly improve temperature measurement
accuracy, the device allows the use of two methods:
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