Endress+Hauser iTEMP TMT82 HART 7 - Page 14

Safety function Temperature transmitter iTEMP TMT82
14 Endress+Hauser
Standard Designation
Min. measuring
span
Limited safety measuring
range
Maximum measurement error
Long-term drift
in °C/per year
1)
Digital (+A/D),
–40 to +70 °C
(–40 to +158 °F)
2)
(D/A)
3)
Pt1000 (4) 10 K (18 °F)
–200 to +250 °C
(–328 to +482 °F)
0.6 K (1.1 °F) 0.19
JIS C1604:1984 Pt100 (5) 10 K (18 °F)
–200 to +510 °C
(–328 to +950 °F)
1.0 K (1.8 °F) 0.32
DIN 43760
IPTS-68
Ni100 (6)
10 K (18 °F)
–60 to +250 °C
(–76 to +482 °F)
0.4 K (0.7 °F) 0.22
Ni120 (7)
–60 to +250 °C
(–76 to +482 °F)
0.3 K (0.54 °F) 0.18
GOST 6651-94
Pt50 (8) 10 K (18 °F)
–180 to +600 °C
(–292 to +1 112 °F)
1.3 K (2.34 °F) 0.61
Pt100 (9) 10 K (18 °F)
–200 to +600 °C
(–328 to +1 112 °F)
1.2 K (2.16 °F) 0.34
OIML R84: 2003,
GOST 6651-2009
Cu50 (10) 10 K (18 °F) –180 to +200 °C
(–292 to +392 °F)
0.7 K (1.26 °F) 0.46
Cu100 (11) 10 K (18 °F) –180 to +200 °C
(–292 to +392 °F)
0.5 K (0.9 °F) 0.23
Ni100 (12) 10 K (18 °F) –60 to +180 °C
(–76 to +356 °F)
0.4 K (0.72 °F) 0.21
Ni120 (13) 10 K (18 °F) –60 to +180 °C
(–76 to +356 °F)
0.3 K (0.54 °F) 0.18
OIML R84: 2003,
GOST 6651-94
Cu50 (14) 10 K (18 °F) –50 to +200 °C
(–58 to +392 °F)
0.7 K (1.26 °F) 0.45
Resistance
transmitter Ω
400 Ω 10 Ω 10 to 400 Ω 0.5 Ω 0.096 Ω/a
2 000 Ω 100 Ω 10 to 2 000 Ω 2.1 Ω 0.51 Ω/a
1) Values apply for 25 °C. For other values, the Arrhenius equation must be applied. This means a doubling of the drift for each 10 °C temperature
increase.
2) Measured value transmitted via HART®.
3) Percentages based on the configured span of the analog output signal.
These values do not take into account deviations caused by EMC. In the event of non-
negligible EMC interference, an additional deviation of 1% from the span must be added to
the values above.
L
CAUTION
When using a 2-wire resistance measurement - valid from hardware version 01.00.07
(head transmitter) and 01.00.05 (DIN rail device):
‣
Make the necessary adjustment to the cable resistance values by performing an offset
correction.
‣
An additional error of 5 °C (9 °F) must be added to the values of the safety measured
errors.
Sample calculation with Pt100 in 4-wire connection, measuring range
0 to +100 °C (+32 to +212 °F), ambient temperature +25 °C (+77 °F), supply voltage 24 V:
Measured error digital = 1.1 K (2.0 °F)
Measurement error D/A = 0.5 % x 100 °C (212 °F) = 0.5 K (0.9 °F)
Measured error: 1.6 K (2.9 °F); for safety measured errors, the most unfavorable values must be anticipated.