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

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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

Performance characteristics

Response time 1 s

TMT122

Reference operating condi­tions

Maximum measured error

Calibration temperature: +25 °C ± 5 K (77 °F ± 9 °F)

The accuracy data are typical values and correspond to a standard deviation of ± 3 (normal
distribution), i.e. 99.8% of all the measured values achieve the given values or better values.

Type Measurement accuracy

Resistance thermometer RTD Pt100, Ni100

Pt500, Ni500
Pt1000, Ni1000

Thermocouple TC K, J, T, E, L, U

N, C, D
R, S
B

Measurement range Measurement accuracy

Resistance transmitter (

Voltage transmitter (mV) -10 to 75 mV ± 20 V or 0.08%

1. % is related to the adjusted measurement range. The value to be applied is the greater.

) 10 to 400 

10 to 2000 

0.2 K or 0.08%

0.5 K or 0.20%

0.3 K or 0.12%

typ. 0.5 K or 0.08%
typ. 1.0 K or 0.08%
typ. 1.4 K or 0.08%
typ. 2.0 K or 0.08%

± 0.1  or 0.08%
± 1.5  or 0.12%

1

1

Physical input range of the sensors

10 to 400  Polynom RTD, Pt100, Ni100

10 to 2000  Pt500, Pt1000, Ni1000

-10 to 75 mV Thermocouple type: C, D, E, J, K, L, N, U

-10 to 35 mV Thermocouple type: B, R, S, T

Influence of power supply  ± 0.01%/V deviation from 24 V

Percentages refer to the full scale value.

Influence of ambient tempe-

Total temperature drift = input temperature drift + output temperature drift

rature (temperature drift)

Effect on the accuracy when ambient temperature changes by 1 K (1.8 °F):

Input 10 to 400  typ. 0.0015% of measured value, min. 4 m

Input 10 to 2000  typ. 0.0015% of measured value, min. 20 m

Input -10 to 75 mV typ. 0.005% of measured value, min. 1.2 μV

Input -10 to 35 mV typ. 0.005% of measured value, min. 0.6 μV

Output 4 to 20 mA typ. 0.005% of span

Typical sensitivity of resistance thermometers:

Pt: 0.00385 * R

Example Pt100: 0.00385 x 100 /K = 0.385 /K

/K Ni: 0.00617 * R

nominal

nominal

/K

4 Endress+Hauser

TMT122

Typical sensitivity of thermocouples:

B: 10 μV/K C: 20 μV/K D: 20 μV/K E: 75 μV/K J: 55 μV/K K: 40 μV/K

L: 55 μV/K N: 35 μV/K R: 12 μV/K S: 12 μV/K T: 50 μV/K U: 60 μV/K

Example for calculating measured error for ambient temperature drift:

Input temperature drift  = 10 K (18 °F), Pt100, measuring range 0 to 100 °C (32 to 212 °F)
Maximum process temperature: 100 °C (212 °F)
Measured resistance value: 138.5  (IEC 60751) at maximum process temperature
Typical temperature drift in : (0.0015% of 138.5 ) * 10 = 0.02078 
Conversion to Kelvin: 0.02078  / 0.385 /K = 0.05 K (0.09 °F)

Influence of load  ±0.02%/100 

Values refer to the full scale value

Long term stability  0.1K/year or  0.05%/year

Values under reference operating conditions. % refer to the set span. The highest value is valid.

Influence of cold junction Pt100 DIN IEC 60751 Cl. B (internal reference junction for thermocouples TC)

Installation conditions

Installation instructions Orientation

No limit

Environment conditions

Ambient temperature limits 40 to +85 °C (-40 to +185 °F) for Ex-area, see Ex-certificate

Storage temperature -40 to +100 °C (-40 to +212 °F)

Climate class According to IEC 60654-1, Class C

Condensation Permitted

Degree of protection IP 20 (NEMA 1)

Shock and vibration resis­tance

Electromagnetic compatibility (EMC)

4g / 2 to 150 Hz as per IEC 60 068-2-6

CE conformity
EMC to all relevant requirements of the IEC/EN 61326 - series and NAMUR Recommendation EMC
(NE21). For details, refer to the Declaration of Conformity.

Maximum fluctuations during EMC- tests: < 1% of measuring span.

Interference immunity to IEC/EN 61326 - series, requirements for industrial areas
Interference emission to IEC/EN 61326 - series, electrical equipment Class B

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Mechanical construction

Design, dimensions

Housing for DIN rail mounting according to IEC 60715; Dimensions in mm (in)

Weight Approx. 90 g (3.2 oz)

Material Housing: Plastic PC/ABS, UL 94V0

TMT122

T09-TMT122-06-10-XX-en-002

Terminals • Keyed plug-in screw terminals, core size max. 2.5 mm² (16 AWG) solid, or strands with ferrules

• Front mounted HART

®

communication socket for 2 mm jack plugs

Human interface

Display elements A yellow illuminated LED signalizes: Device is operational.

With the PC software ReadWin® 2000 or FieldCare the current measured value can be displayed.

Operating elements At the temperature transmitter no operating elements are available directly. The temperature trans-

mitter will be configured by remote operation with the PC software ReadWin

Remote operation Configuration

Hand operating module DXR375 or PC with Commubox FXA191/FXA195 and operating software
(ReadWin

Interface

PC interface Commubox FXA191 (RS232) or FXA195 (USB).

Configurable parameters

Sensor type and connection type, engineering units (°C/°F), measurement range, internal/external cold
junction compensation, cable resistance compensation on 2-wire connection, fault conditioning, out­put signal (4 to 20/20 to 4 mA), digital filter (damping), offset, measurement point identification +
descriptor (8 + 16 characters), output simulation, customer specific linearisation, min./max. process
value indicator function.

®

2000 or FieldCare).

®

2000 or FieldCare.

Certificates and approvals

CE-Mark The device meets the legal requirements of the EC directives. Endress+Hauser confirms that the device

has been successfully tested by applying the CE mark.

Hazardous area approvals For further details on the available Ex versions (ATEX, CSA, FM, etc.), please contact your nearest End-

ress+Hauser sales organisation. All relevant data for hazardous areas can be found in separate Ex
documentation. If required, please request copies from us or your Endress+Hauser sales organisation.

Marine approval For further details on the available "Type Approval Certificiates" (DNVGL, BV, etc.), please contact your

nearest Endress+Hauser sales organisation. All relevant data for marine approval can be found in

6 Endress+Hauser

TMT122

separate "Type Approval Certificiates". If required, please request copies from us or your
Endress+Hauser sales organisation.

UL approval UL recognized component (see www.ul.com/database, search for Keyword "E225237")

Other standards and guideli­nes

CSA GP CSA General Purpose

IEC 60529:
Degree of protection provided by housing (IP-Code)
IEC 61010:
Safety requirements for electrical measurement, control and laboratory use.
IEC 61326:
Electromagnetic compatibility (EMC requirements)
NAMUR
Standards working group for measurement and control technology in the chemical industry.
(www.namur.de)

Ordering information

Detailed ordering information is available from the following sources:

• In the Product Configurator on the Endress+Hauser website: www.endress.com -> Click "Corporate"

-> Select your country -> Click "Products" -> Select the product using the filters and search field ->
Open product page -> The "Configure" button to the right of the product image opens the Product
Configurator.

• From your Endress+Hauser Sales Center: www.addresses.endress.com

•

Product Configurator - the tool for individual product configuration

• Up-to-the configuration

• Depending on the device: Direct input of measuring point-specific information such as
measuring range or operating language

• Automatic verification of exclusion criteria

• Automatic creation of the order code and its breakdown in PDF or Excel output format

• Ability to order directly in the Endress+Hauser Online Shop

Accessories

• Commubox FXA191 (RS232) or FXA195 (USB)
Order code: FXA191-... or FXA195-...

• PC-operating software: ReadWin
ReadWin® 2000 can be downloaded free of charge from the internet from the following address:

www.endress.com/readwin

• Hand operating module ’HART® Communicator DXR375’, Order code: DXR375-...

®

2000 or FieldCare

Documentation

• Compact instructions ’iTEMP HART® DIN rail TMT122’ (KA128R/09/a3)

• Additional documentation for use in explosion-hazardous areas:
ATEX II2(1)G (XA016R/09/a3)
ATEX II3G (XA019R/09/a3)

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TMT112

www.addresses.endress.com