Operating Instructions

Technical data iTEMP TMT72
50 Endress+Hauser
Standard Designation Measuring range Measured error (±)
Digital
1)
D/A
2)
Type T (40) –150 to +400 °C (–238 to +752 °F) ≤ 0.5 °C (0.9 °F)
ME = ± (0.5 °C (0.9 °F) -
0.04% * (MV- LRV))
DIN 43710
Type L (41)
–150 to +900 °C
(–238 to +1 652 °F)
≤ 0.39 °C (0.7 °F)
ME = ± (0.39 °C (0.7 °F) -
0.008% * (MV- LRV))
Type U (42)
–150 to +600 °C
(–238 to +1 112 °F)
≤ 0.45 °C (0.81 °F)
ME = ± (0.45 °C (0.81 °F) -
0.025% * (MV- LRV))
GOST R8.8585-2001 Type L (43)
–200 to +800 °C
(–328 to +1 472 °F)
≤ 2.30 °C (4.14 °F)
ME = ± (2.3 °C (4.14 °F) -
0.015% * (MV- LRV))
Voltage transmitter
(mV)
–20 to +100 mV 10.0 µV ME = ± (10.0 µV + 0.0018%
* (MV - LRV))
4.8 µA
1)
Measured value transmitted via HART
®
.
2) Percentages based on the configured span of the analog output signal.
3) Maximum measured error for the specified measuring range.
4) Deviations from maximum measured error possible due to rounding.
MV = Measured value
LRV = Lower range value of relevant sensor
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), ambient
temperature +25 °C (+77 °F), supply voltage 24 V:
Measured error digital = 0.05 °C + 0.006% x (200 °C - (-200 °C)): 0.07 °C (0.126 °F)
Measured error D/A = 0.003 % x 200 °C (360 °F) 0.06 °C (0.108 °F)
Measured error digital value (HART): 0.07 °C (0.126 °F)
Measured error analog value (current output): √(Measured error digital² +
Measured error D/A²)
0.10 °C (0.18 °F)
Sample calculation with Pt100, measuring range 0 to +200 °C (+32 to +392 °F), ambient
temperature +35 °C (+95 °F), supply voltage 30 V:
Measured error digital = 0.04 °C + 0.006% x (200 °C - (-200 °C)): 0.07 °C (0.126 °F)
Measured error D/A = 0.03 % x 200 °C (360 °F) 0.06 °C (0.108 °F)
Influence of ambient temperature (digital) = (35 - 25) x (0.0013 % x 200 °C -
(-200 °C)), min. 0.003 °C
0.05 °C (0.09 °F)
Influence of ambient temperature (D/A) = (35 - 25) x (0.003% x 200 °C) 0.06 °C (0.108 °F)
Influence of supply voltage (digital) = (30 - 24) x (0.0007% x 200 °C - (-200 °C)),
min. 0.005 °C
0.02 °C (0.036 °F)
Influence of supply voltage (D/A) = (30 - 24) x (0.003% x 200 °C) 0.04 °C (0.72 °F)
Measured error digital value (HART):
√(Measured error digital² + Influence of ambient temperature (digital)² + Influence
of supply voltage (digital)²
0.10 °C (0.18 °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
0.13 °C (0.23 °F)