Endress+Hauser MT142 Specifications

Technical Information

iTEMP® HART® TMT142

Temperature transmitter for resistance thermometers, thermocouples, resistance transmitters and voltage transmitters,

adjustable via HART

protocol

Application

• Temperature field transmitter with HART for converting various input signals to an analogue, scalable 4 to 20 mA output signal

• Universal input usable for: Resistance thermometer (RTD) Thermocouples (TC) Resistance transmitter (Ω) Voltage transmitter (mV)

•HART

• Optional: stainless steel housing for EEx d application

Your benefits

• Universally programmable with HART

• Illuminated display, rotatable

• Operation, visualisation and maintenance with PC,

• Two-wire technology, analog output 4 to 20 mA

• Undervoltage detection

• Highly accurate in entire operating temperature range

protocol for operating the device on site using

handheld terminal (DXR375) or remotely via the PC

various input signals

e.g. using FieldCare or ReadWin

2000 operating software

protocol

protocol for

• Sensor monitoring: Failure conditioning, corrosion detection to NAMUR NE 89

• Failure conditioning in event of sensor break or sensor short-circuit, adjustable to NAMUR NE 43

• EMC to NAMUR NE 21, CE

• Approvals: ATEX (EEx ia, EEx d and dust ignition-proof), FM and CSA (IS, NI, XP and DIP)

• Galvanic isolation

• Output simulation

• Min./max. process value recorded

TI00107R/09/en 71190515

Function and system design

PMC731:PIC0001 Online

1>GroupSelect 2PV

0.7bar

HELP

TMT142

Commubox

FieldCare, ReadWin 2000

DXR375

HART Communication

RN221N

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

Measuring system

TMT142

Example of an application of the field transmitter

The iTEMP® HART® temperature field transmitter TMT142 is a two-wire transmitter with an analogue output, an input for resistance thermometers and resistance transmitters in 2-wire, 3-wire or 4-wire connection, thermocouples and voltage transmitters. The LC display shows the current measured value digitally and as a bar graph with an indicator for limit value violation. The TMT142 can be operated via the HART

protocol

using a handheld terminal (DXR375) or PC (FieldCare or ReadWin® 2000 operating software).

Corrosion detection

Sensor connection line corrosion can corrupt the measured value. For this reason, the device gives you the opportunity to detect corrosion for thermocouples and resistance thermometers with a 4-wire connection before measured value corruption takes place.

2 Endress+Hauser

TMT142

Input

Measured variable Temperature (temperature linear transmission behaviour), resistance and voltage

Measuring range The transmitter records different measuring ranges depending on the sensor connection and input signals (see

'Type of input').

Type of input

Input Designation Measuring range limits

Resistance thermometer (RTD)

To IEC 60751 (α = 0.00385)

To JIS C1604-81 (α = 0.003916) To DIN 43760 (α = 0.006180)

To Edison Copper Winding No.15 (α = 0.004274) To SAMA (α = 0.003923) To Edison Curve (α = 0.006720) To GOST (α = 0.003911)

To GOST (α = 0.004280)

Pt100 Pt200 Pt500

Pt1000

Pt100

Ni100

Ni1000

Cu10

Pt100

Ni120

Pt50

Pt100

Cu50, Cu100

Polynomial RTD

Pt100 (Callendar - van Dusen)

• Type of connection: 2-wire, 3-wire or 4-wire connection

• With 2-wire circuit, compensation of wire resistance possible (0 to 30 Ω)

• With 3-wire and 4-wire connection, sensor wire resistance to max. 50 Ω per wire

• Sensor current: ≤ 0.3 mA

-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 to 1200 °F)

-60 to 250 °C (-76 to 482 °F)

-60 to 150 °C (-76 to 302 °F)

-100 to 260 °C (-148 to 500 °F)

-100 to 700 °C (-148 to 1292 °F)

-70 to 270 °C (-94 to 518 °F)

-200 to 1100 °C (-328 to 2012 °F)

-200 to 850 °C (-328 to 1562 °F)

-200 to 200 °C (-328 to 392 °F)

-200 to 850 °C (-328 to 1562 °F)

Resistance transmitter Resistance Ω 10 to 400 Ω

10 to 2000 Ω

Thermocouples (TC)

To NIST monograph 175, IEC 584

to ASTM E988

to DIN 43710

Voltage transmitter (mV) Millivolt transmitter (mV) -20 to 100 mV

1) Increasing inaccuracy for temperatures < 300 °C (< 572 °F)

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

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

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

• Internal cold junction (Pt100)

• External cold junction: configurable value -40 to +85 °C (-40 to +185 °F)

• Max. sensor resistance 10 kΩ (if sensor resistance is greater than 10 kΩ, error message as per NAMUR NE 89)

+40 to +1820 °C (+104 to 3308

°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)

-270 to +1300 °C (-454 to 2372 °F)

-50 to +1768 °C (-58 to 3214 °F)

-260 to +400 °C (-436 to 752 °F)

0 to +2315 °C (32 to 4199 °F) 0 to +2315 °C (32 to 4199 °F)

-200 to +900 °C (-328 to 1652 °F)

-200 to +600 °C (-328 to 1112 °F)

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Output

40 V

1261

1011

250

11 V

34.25 V16.75 V

Supply voltage (V DC)

Load ( )W

TMT142

Output signal

Analog output 4 to 20 mA, 20 to 4 mA (can be inverted)

Signal encoding FSK ± 0.5 mA via current signal

Data transmission rate 1200 baud

Galvanic isolation U = 2 kV AC (input/output)

Failure information Failure information as per NAMUE NE43:

Failure information is created if the measuring information is missing or not valid. A complete list of all the errors occurring in the measuring system is created.

Underranging Linear drop from 4.0 to 3.8 mA

Overranging Linear increase from 20.0 to 20.5 mA

Load (HART®)

Failure, e.g. sensor breakage; sensor short circuit

b max.

= (U

- 11 V) / 0.023 A (current output)

b max.

≤ 3.6 mA ("low) or ≥ 21.6 mA ("high"), can be selected The "high" alarm setting can be set between 21.6 mA and 23 mA, thus providing the flexibility needed to meet the requirements of various control systems.

Linearisation/transmission

Temperature linear, resistance linear, voltage linear

behaviour

Filter 1

order digital filter: 0 to 60 s

Current consumption • 3.6 to 23 mA

• Minimum current consumption ≤ 3.5 mA

• Current limit ≤ 23 mA

Protocol-specific data

HART

Version 5

Write protection

Device description files (DD) Information and files are available free of charge at:

Load (communication resistor)

Switch-on delay 4 s (during switch-on operation I

Hardware setting for activating write protection

www.endress.com www.hartcomm.org

≤ 4 mA)

min. 250

Ω

A0010971-EN

4 Endress+Hauser

TMT142

Electrical connection

Power supply

Supply voltage U

= 11 to 40 V (8 to 40 V without display), reverse polarity protection

Power must be fed to the device from an 11 to 40 VDC power supply in accordance with NEC Class 02 (low voltage/current) with short-circuit power limit to 8 A/150 VA.

Cable entry

Version Type

Thread 3x thread NPT½"

Cable gland 2x cable gland M20x1.5

Residual ripple Perm. residual ripple U

3x thread M20x1,5

3x thread G½"

1x thread M24x1.5 and 2x M20x1.5

≤ 3 V at Ub ≥ 13.5 V, f

max.

= 1 kHz

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