TMT180 Technical Data
Endress+Hauser 19
Source impedance
Transmission behavior Temperature linear
Filter 1st order digital filter: 0 to 8 s
Input current required ≤ 3.5 mA
Current limit ≤ 23 mA
Switch on delay 4 s (during power up I
a
≤ 3.8 mA)
Response time 1 s
10.0.4 Power supply
Electrical connection See ’Terminal layout’ in Chapter ’Wiring’.
Supply voltage U
b
= 10 to 35 V, polarity protected
Residual ripple Allowable ripple U
ss
≤ 3 V at U
b
≥ 13 V, f
max.
= 1 kHz
10.0.5 Performance characteristics
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
temperature (Temperature
drift)
• Resistance thermometer Pt100:
T
d
= ±(8.3 ppm/°F * (range end value + 328) + 27.8 ppm/°F * preset meas. range) * Δ ϑ
Δ ϑ = Deviation of the ambient temperature according to the reference condition
(73.4 °F ± 9 °F).
max. (V
Power supply
- 10 V) / 0.022 A (current
output)
e.g. (24 V - 10 V)/0.022 A = 636.4 Ω
Type Measurement accuracy
1)
1) % is related to the adjusted measurement range. The value to be applied is the greater.
Resistance thermometer
RTD
Pt100 -328 to 1202 °F (-200 to 650 °C)
Pt100 -58 to 482 °F (-50 to 250 °C)
0.36 °F (0.2 °C) or 0.08%
0.18 °F (0.1 °C) or 0.08%
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