Endress+Hauser MT122 Specifications
TI00090R/09/en/14.19
71427748
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Technical Information
iTEMP HART® TMT122 DIN rail
Universal temperature transmitter for resistance thermometers (RTD), thermocouples, resistance and voltage
transmitters, incorporating HART® protocol
Application
• Temperature transmitter with HART® protocol for converting
various input signals into a scalable
4 to 20 mA analog output signal
• Input:
Resistance thermometer (RTD)
Thermocouple (TC)
Resistance transmitter ()
Voltage transmitter (mV)
®
•HART
• Installation on DIN rail according to IEC 60715
protocol for front end unit or panel unit
operation using the hand operating module (DXR375) or PC
(e.g. ReadWin® 2000 or FieldCare)
Your benefits
• Universal settings with HART
signals
• 2-wire technology, 4 to 20 mA analog output
• High accuracy in total ambient temperature range
• Fault signal on sensor break or short circuit,
presettable to NAMUR NE 43
• EMC to NAMUR NE 21, CE
• UL recognized component
• Ex-Certification:
- ATEX Ex ia
- CSA IS
- FM IS
• Marine approval
• Galvanic isolation
•Output simulation
• Min./max. process value indicator function
• Customer-specific linearization
• Linearization curve match
®
protocol for various input
TMT122
Function and system design
Measurement principle Electronic measurement and conversion of input signals in industrial temperature measurement.
®
Measurement system The iTEMP HART
TMT122 DIN rail temperature transmitter is a 2-wire transmitter with an analog
output. It has measurement input for resistance thermometers (RTD) in 2-, 3- or 4-wire connection,
thermocouples (TC) and voltage transmitters. Setup of the device is done using the HART® protocol
with hand operating module (DXR375) or PC (configuration software ReadWin
®
2000 or FieldCare).
Input
Measured variable Temperature (temperature linear), resistance and voltage.
Measuring range Depending upon the sensor connection and input signal. The transmitter evaluates a number of diffe-
rent measurement ranges.
Type of input
Resistance
thermometer (RTD)
acc. to IEC 751 ( = 0.00835)
acc. to JIS C 1604-81 ( = 0.003916)
acc. to DIN 43760 ( = 0.006180)
Resistance transmitter Resistance 10 to 400
Thermocouples (TC) B (PtRh30-PtRh6)
Type Measurement ranges Min. measurement
Pt100
Pt500
Pt1000
Pt100
Ni100
Ni500
Ni1000
Connection type: 2-, 3- or 4-wire connection
Software compensation of cable resistance possible in the 2-wire system (0 to 30 )
Sensor cable resistance max. 40
C (W5Re-W26Re)
D (W3Re-W25Re)
E (NiCr-CuNi)
J (Fe-CuNi)
K (NiCr-Ni)
L (Fe-CuNi)
N (NiCrSi-NiSi)
R (PtRh13-Pt)
S (PtRh10-Pt)
T (Cu-CuNi)
U (Cu-CuNi)
acc. to IEC 584 Part 1
1
1
2
2
-200 to 850 °C (-328 to 1562 °F)
-200 to 250 °C (-328 to 482 °F)
-200 to 250 °C (-238 to 482 °F)
-200 to 649 °C (-328 to1200 °F)
-60 to 250 °C (-76 to 482 °F)
-60 to 150 °C (-76 to 302 °F)
-60 to 150 °C (-76 to 302 °F)
per cable
Sensor current:
+40 to +1820 °C (104 to 3308 °F)
0 to +2320 °C (32 to 4208 °F)
0 to +2495 °C (32 to 4523 °F)
-270 to +1000 °C (-454 to 1832 °F)
-210 to +1200 °C (-346 to 2192 °F)
-270 to +1372 °C (-454 to 2501 °F)
-200 to +900 °C (-328 to 1652 °F)
-270 to +1300 °C (-454 to 2372 °F)
-50 to +1768 °C (-58 to 3214 °F)
-50 to +1768 °C (-58 to 3214 °F)
-270 to +400 °C (-454 to 752 °F)
-200 to +600 °C (-328 to 1112 °F)
0.2 mA
10 to 2000
range
10 K (18 °F)
10 K (18 °F)
10 K (18 °F)
10 K (18 °F)
10 K (18 °F)
10 K (18 °F)
10 K (18 °F)
10
100
500 K (900 °F)
500 K (900 °F)
500 K (900 °F)
50 K (90 °F)
50 K (90 °F)
50 K (90 °F)
50 K (90 °F)
50 K (90 °F)
500 K (900 °F)
500 K (900 °F)
50 K (90 °F)
50 K (90 °F)
Cold junction internal (Pt100), cold junction accuracy: ± 1 K
Voltage transmitters Millivolt transmitter -10 to 75 mV 5 mV
1. According to ASTM E988
2. According to DIN 43710
2 Endress+Hauser
TMT122
Output
Output signal Analog 4 to 20 mA, 20 to 4 mA
Signal on alarm • Measurement range undercut:
Linear drop to 3.8 mA
• Exceeding measurement range:
Linear rise to 20.5 mA
• Sensor break; Sensor short circuit (not for thermocouples TC):
3.6 mA or 21.0 mA (if setting 21.0 mA the output is > 21.5 mA)
Load Max. (V
Linearization / transmission behaviour
Filter Digital filter 1. degree: 0 to 100 s
Galvanic isolation U = 2 kV AC (Input/output)
min. current consumption 3.5 mA
Current limit 23 mA
Switch on delay 4 s (during power up I
Temperature linear, resistance linear, voltage linear
Power supply
- 12 V) / 0.022 A (current output)
3.8 mA)
a
Power supply
Electrical connection
T09-TMT122-04-10-XX-en-001
Temperature transmitter terminal connections
For the unit operation via HART® communication sockets a minimum load resistance of 250 is
necessary in the signal circuit!
Supply voltage Ub = 12 to 35 V, polarity protected
dual ripple Allowable ripple Uss 3 V at Ub 15 V, f
Resi
max.
= 1 kHz
Endress+Hauser 3
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