TMT182 7 Maintenance
Endress+Hauser 31
10.5 Performance characteristics
Response time 1 s (TC), 1.5 s (RTD)
Reference operating
conditions
Calibration temperature: 77 °F ± 9 °F (+25 °C ± 5 °C)
Maximum measured error
Influence of supply voltage ≤ ±0.01%/V deviation from 24 V
Percentages refer to the full scale value.
Influence of ambient tem-
perature (Temperature drift)
• Resistance thermometer (RTD):
T
d
= ±(8.3 ppm/°F * max. meas. range + 27.8 ppm/°F * preset meas. range) * Δ ϑ
• Resistance thermometer Pt100:
T
d
= ±(8.3 ppm/°F * (range end value + 328) + 27.8 ppm/°F * preset meas. range) * Δ ϑ
• Thermocouple (TC):
T
d
= ±(27.8 ppm/°F * max. meas. range + 27.8 ppm/°F * preset meas. range) * Δ ϑ
Δ ϑ = Deviation of the ambient temperature according to the reference condition (77 °F ± 9 °F).
Influence of load ± 0.02%/100 Ω
Values refer to the full scale value
Long-term stability ≤ 0.18 °F/year (0.1 °C/year) or ≤ 0.05%/year
Values under reference operating conditions. % refer to the set span. The highest value is valid.
Influence of cold junction Pt100 IEC 60751 Cl. B (internal cold junction for thermocouples TC)
10.6 Installation conditions
Installation instructions • Installation angle:
no limit
• Installation area:
Connection head accord. to DIN 43 729 Form B; TAF10 field housing
Type Measurement accuracy
1
Resistance thermometer
RTD
Pt100, Ni100
Pt500, Ni500
Pt1000, Ni1000
0.36 °F (0.2 °C) or 0.08%
0.9 °F (0.5 °C) or 0.20%
0.54 °F (0.3 °C) or 0.12%
Thermocouple TC
K, J, T, E, L, U
N, C, D
S, B, R
typ. 0.9 °F (0.5 °C) or 0.08%
typ. 1.8 °F (1.0 °C) or 0.08%
typ. 3.6 °F (2.0 °C) or 0.08%
Measurement range Measurement accuracy
a
a.% is related to the adjusted measurement range. The value to be applied is the greater.
Resistance transmitter
(Ω)
10 to 400 Ω
10 to 2000 Ω
± 0.1 Ω or 0.08%
± 1.5 Ω or 0.12%
Voltage transmitters
(mV)
-10 to 75 mV ± 20 μV or 0.08%
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