Endress+Hauser MT80 Specifications
TI00153R/09/EN/05.18
71404737
2018-06-21
Technical Information
iTEMP TMT80
Universal temperature head transmitter for
resistance thermometers and thermocouples
PC-programmable
Application
• PC-programmable (PCP) temperature head transmitter for converting different
input signals to an analog, scalable 4 to 20 mA output signal
• For resistance thermometers (RTD) and thermocouples (TC)
• Device configuration via PC with configuration kit and ReadWin® 2000 PC
software
Your benefits
• 2-wire power supply, analog output4 to 20 mA
• Fault signal in the event of sensor break or sensor short circuit, adjustable as per
NAMUR NE43
• Meets EMC requirements as per NAMUR NE21
• Galvanic isolation 500 V (input/output)
• Adjustment of the application-specific measuring range
Function and system design
iTEMP TMT80
Measuring principle
Measuring system
Measured variable
Measuring range
Resistance thermometer (RTD)
as per standard
IEC 60751 (α = 0.00385)
Electronic recording and conversion of various input signals in industrial temperature measurement.
The iTEMP® TMT80 temperature head transmitter is a loop-powered transmitter with analog output
and a measurement input for resistance thermometers in 2-, 3-, or 4-wire connection and
thermocouples. The device is set up using a configuration kit and ReadWin 2000 operating software,
which is free of charge.
Input
Temperature (temperature-linear transmission behavior)
The device provides different measuring ranges depending on the sensor connection and input
signals:
Designation Measuring range limits Min. span
Pt100
Pt1000
• 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 up to max. 11 Ω per cable
• Sensor current: ≤ 0.6 mA
–200 to +850 °C (–328 to +1 562 °F)
–200 to +250 °C (–328 to +482 °F)
10 K (18 °F)
Thermocouples as per standard Designation Measuring range limits Min. span
IEC 60584, Part 1
Type B (PtRh30-PtRh6) (31)
Type K (NiCr-Ni) (36)
Type N (NiCrSi-NiSi) (37)
Type R (PtRh13-Pt) (38)
Type S (PtRh10-Pt) (39)
• Internal cold junction (Pt100)
• Cold junction accuracy: ± 1 K
0 to +1 820 °C (+32 to +3 308 °F)
–200 to +1 372 °C (–328 to +2 501 °F)
–270 to +1 300 °C (–454 to +2 372 °F)
–50 to +1 768 °C (–58 to +3 214 °F)
–50 to +1 768 °C (–58 to +3 214 °F)
500 K
50 K
50 K
500 K
500 K
Output
Output signal
Signal on alarm
Load
Analog, 4 to 20 mA
• Underranging:
Linear drop to 3.8 mA
• Overranging:
Linear rise to 20.5 mA
• Sensor breakage; sensor short-circuit
1)
:
≤ 3.6 mA or ≥ 21.0 mA (if setting is ≥ 21.0 mA an output current ≥ 21.5 mA is guaranteed)
Max. (V
power supply
- 8 V) / 0.025 A (Current output)
Transmission behavior
Galvanic isolation
1) Not for thermocouples
Temperature linear
U = 500 VAC (input/output)
2 Endress+Hauser
iTEMP TMT80
3
5
6
3
4
5
6
3
6
RTD
1
2
4
6
TC
2-wire
3-wire
4-wire
8 to 35 V DC
4 to 20 mA
SETUP-Socket
white white
red
red
white
red
red
white
red
Input current required
Current limit
Switch-on delay
Terminal assignment
≤ 3.5 mA
≤ 25 mA
4 s
Power supply
Supply voltage
Residual ripple
Response time
Reference operating conditions
Maximum measured error
A0013539-EN
1 Terminal assignment of temperature transmitter
Ub = 8 to 35 V, reverse polarity protection
Permitted ripple Uss ≤ 3 V at Ub ≥ 15 V, f
max.
= 1 kHz
Performance characteristics
1 s
• Calibration temperature: +25 °C (+77 °F) ± 5 K (9 °F)
• Supply voltage: 24 V
• 4-wire circuit for resistance adjustment
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 applies.
Resistance thermometer RTD Pt100, Pt1000 0.5 K or 0.15%
Thermocouples TC K, N
DC
Designation Accuracy
typ. 1.0 K or 0.15 %
S, B, R
typ. 2.0 K or 0.15 %
2)
Influence of the supply voltage
2) All data is related to a full scale value
≤ ±0.01%/V deviation from 24 V
Endress+Hauser 3
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