Endress+Hauser MT181 Specifications

TI00070R/09/EN/02.18 71409786

Products Solutions Services

Technical Information

iTEMP TMT181

Universal head transmitter for resistance thermometers (RTD), thermocouples, resistance and voltage transmitters, PC programmable, for installation in a terminal head form B

Application

• PC programmable (PCP) temperature head transmitter for converting various input signals into an scalable 4 to 20 mA analog output signal

• Input: Resistance thermometer (RTD) Thermocouple (TC) Resistance transmitter () Voltage transmitter (mV)

• Online configuration using PC with TXU10-AA configuration kit (accessory)

Your benefits

• Universally PC programmable for various 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 to UL 3111-1

• Marine approval – Ex certification – ATEX Ex ia and dust ex zone 22 in compliance with

EN 50281-1 –FM IS –CSA IS

• Galvanic isolation

• Online configuration during measurement using SETUP connector

• Customer-specific linearization

• Adjustment of characteristic curve

•Output simulation

iTEMP TMT181

Function and system design

Measuring principle Electronic measurement and conversion of input signals in industrial temperature measurement.

Application example TMT181

a0016026

Measuring system The iTEMP PCP TMT181 temperature head transmitter is a two wire transmitter with an analog

output. It has measurement input for resistance thermometers (RTD) in 2-, 3- or 4-wire connection, thermocouples and voltage transmitters. Setting up of the TMT181 is done using the TXU10-AA configuration kit.

Input

Input signal Resistance thermometer (RTD)

Type Measurement ranges min.

measurement range

as per IEC 751 (a = 0.00385)

as per DIN 43760 (a = 0.00618)

Connection type 2-, 3- or 4-wire connection

Pt100 Pt500 Pt1000

Ni100 Ni500 Ni1000

-200 up to 850 °C

-200 up to 250 °C

-200 up to 250 °C)

-60 up to 180 °C

-60 up to 150 °C

cable resistance compensation possible in the 2 wire system (0 up to 20 ).

(-328 up to +1562 °F) (-328 up to +482 °F) (-328 up to +482 °F

(-76 up to +356 °F) (-76 up to +302 °F) (-76 up to +302 °F)

10 K (18 °F) 10 K (18 °F) 10 K (18 °F)

Sensor cable resistance max. 11  per wire

Sensor current ≤ 0.6 mA

Resistance transmitter ()

Type Measurement ranges min. measurement range

Resistance () 10 up to 400 

10 up to 2000 

10  100 

2 Endress+Hauser

iTEMP TMT181

Thermocouple (TC)

Type Measurement ranges min.

as per NIST Monograph 175, IEC 584

as per ASTME E988

as per DIN 43710

w/o MoRe5-MoRe41 0 up to 2000 °C (32 up to 3632 °F) 500 °C (900 °F)

Cold junction internal (Pt100) or external (0 up to 80 °C (32 up to 176 °F))

Accuracy of cold junction ± 1 K (± 1.8 °F)

Sensor current 30 nA

1) Higher measurement error for temperatures below 300 °C (572 °F).

B (PtRh30-PtRh6) E (NiCr-CuNi) J (Fe-CuNi) K (NiCr-Ni) N (NiCrSi-NiSi) R (PtRh13-Pt) S (PtRh10-Pt) T (Cu-CuNi)

C (W5Re-W26Re) D (W3Re-W25Re)

L (Fe-CuNi) U (Cu-CuNi)

0 up to +1820 °C

-200 up to +915 °C

-200 up to +1200 °C

-200 up to +1372 °C

-270 up to +1300 °C 0 up to +1768 °C 0 up to +1768 °C

-200 up to +400 °C

0 up to 2320 °C 0 up to 2495 °C

-200 up to +900 °C

-200 up to +600 °C

(32 up to 3308 °F) (-328 up to 1679 °F) (-328 up to 2192 °F) (-328 up to 2501 °F (-454 up to 2372 °F) (32 up to 3214 °F) (32 up to 3214 °F) (-328 up to 752 °F)

(32 up to 4208 °F) (32 up to 4523 °F)

(-328 up to 1652 °F) (-328 up to 1112 °F)

measurement range

500 °C (900 °F) 50 °C (90 °F) 50 °C (90 °F) 50 °C (90 °F) 50 °C (90 °F) 500 °C (900 °F) 500 °C (900 °F) 50 °C (90 °F)

50 °C (90 °F) 50 °C (90 °F)

Voltage transmitter (mV)

Designation Measurement ranges min. measurement

Millivolt transmitter (mV)

Output

Output signal Current output

4 up 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 breakage, sensor short circuit

1) Not for thermocouple

range

-10 up to 100 mV 5 mV



3.6 mA or  21.0 mA

Load Max. load: (V

- 8 V) / 0.025 A

supply

Transmission behavior Temperature linear, resistance linear, voltage linear

Galvanic isolation I/O: U = 2 kV AC

Endress+Hauser 3

+ 5 hidden pages