Endress+Hauser MT180 Specifications
TI00088R/09/EN/15.18
71408677
2018-06-29
Products Solutions Services
Technical Information
iTEMP TMT180
Temperature head transmitter
for resistance thermometers Pt100
Configurable using a PC, for installation in a
terminal head, form B
Application
• PC-programmable (PCP) temperature head transmitter for converting a Pt100
input signal to an analog, scalable 4 to 20 mA output signal
• Input: Resistance thermometer Pt100
• Online configuration using a PC with configuration kit and PC software
Your benefits
• Universally PC-programmable for Pt100 input signal
• Two-wire technology, analog output 4 to 20 mA
• High level of accuracy over the entire operating temperature range
• Fault signal in the event of sensor break or sensor short circuit, presettable to
NAMUR NE 43
• EMC according to IEC/EN 61326-1, CE
• Online configuration during operation with SETUP connector
• Customer-specific measuring range setting
• DNV GL marine approval
• UL approval
• CSA GP (General Purpose)
Function and system design
iTEMP TMT180
Measuring principle
Measuring system
Measured variable
Measuring range
Electronic recording and conversion of Pt100 input signals in industrial temperature measurement.
The iTEMP TMT180 temperature head transmitter is a two-wire transmitter with an analog output
and measurement input for Pt100 in 2-, 3-, or 4-wire connection. The device is set up using a
configuration kit and the ReadWin 2000 operating software which is free-of-charge.
Input
Temperature (temperature-linear transmission behavior)
Description Measuring range limits Min. span
Pt100
as per IEC 60751
• Connection type: 2-, 3- or 4-wire connection
With 2-wire circuit, compensation of wire resistance possible (0 to 20 Ω )
• Cable resistance: Sensor cable resistance max. 11 Ω per cable
• Sensor current: ≤ 0.6 mA
–200 to +650 °C (–328 to +1 202 °F) 10 K
–50 to 250 °C (–58 to +482 °F) 10 K
Output
Output signal
Transmission behavior
Signal on alarm
Load
Input current required
Current limit
Switch-on delay
Analog, 4 to 20 mA, 20 to 4 mA
Temperature linear
• Sensor breakage; sensor short circuit:
≤ 3.6 mA or ≥ 21.0 mA (if setting is ≥ 21.0 mA an output current ≥ 21.5 mA is guaranteed)
• Underranging:
Linear drop to 3.8 mA
• Overranging:
Linear rise to 20.5 mA
Max. (V
≤ 3.5 mA
≤ 23 mA
4 s (during power up Ia = 3.8 mA)
power supply
- 10 V) / 0.022 A (Current output)
2 Endress+Hauser
iTEMP TMT180
3
5
6
RTD
3
4
5
6
RTD
3
6
RTD
SETUP
1
2
2-wire
3-wire
4-wire
10 to 35 V DC
4 to 20 mA
Terminal assignment
Power supply
A0018204-EN
1 Head transmitter terminal assignment
Supply voltage
Residual ripple
Response time
Reference operating conditions
Maximum measured error
Ub = 10 to 35 VDC, reverse polarity protection
Permitted ripple Uss ≤ 3 V at Ub ≥ 13 V, f max. = 1 kHz
Performance characteristics
1 s
Calibration temperature: +25 °C (+77 °F) ± 5 K (9 °F)
The data relating to the measured error are typical values and correspond to a standard deviation of
± 3σ (normal distribution), i.e. 99.8% of all measured values achieve the specified values or better
values. Percentage values refer to the set span. The larger value is valid.
Description Accuracy
RTD assembly
RTD
1) optional
Pt100 –200 to +650 °C (–328 to +1 202 °F) 0.2 K or 0.08%
1)
Pt100
–50 to 250 °C (–58 to +482 °F) 0.1 K or 0.08%
Pt100 –200 to +250 °C (–328 to +482 °F) 0.2 K or 0.08%
Influence of the supply
≤ ±0.01%/V deviation from 24 V
1)
voltage
2)
or ≤ 0.05%/Year
Long-term drift
Influence of ambient temperature
1) All data is related to a full scale value
2) Under reference operating conditions
3) % is related to the set span. The larger value is valid.
≤ 0.1 K/Year
Resistance thermometer (Pt100):
Td = ± (15 ppm/K * (full scale value - measuring range start) + 50 ppm/K * preset measuring range)
* Δθ
2) 3)
Endress+Hauser 3
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