Product and Ordering Information

 
Order Code
HP – (Range) – (Input)
 
iTEMP PCP TMT 181Application:
Temperature Head Transmitters 1 | Thermo Sensors

• Economical and technical alternative to direct wiring to DCS or PLC

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

• Suitable for RTD thermometers, thermocouples TC, Ohm and mV inputs

• 2-wire transmitter for a linear temperature proportional analog output

Features and benefitsand also:

• Operation, visualization and maintenance with PC, using ReadWin ® 2000 freeware

• High accuracy: 0.08% of span

• Breakdown information in event of sensor break or short-circuit, enables a quick maintenance intervention

• Outstanding 3.75 kV AC galvanic isolation from the sensor input to the output

• Online configuration during measurement using configuration kit for an easy setup

• Output simulation for a quick and easy check of the loop 

• Customized measuring range setup or expanded SETUP, see questionnaire page 6

• Long term stability: <0.05%

• Electromagnetic compatibility to IEC 61326 for use in noisy environments

• Fully potted electronics and gold plated terminals allow humidity

• Captive screws for ease of connection

• Customer specific linearization

• Linearization curve match improves accuracy

• Approvals: FM, CSA and ATEX for high safety standards

• UL recognized component to UL 3111-1

• GL German Lloyd marine approval

 

Operation and system construction
Measurement principle

Electronic monitoring and conversion of input signals in industrial

temperature measurement.

Measurement system

The iTEMP PCP TMT 181 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 TMT 181 is

done using the TMT 181A configuration kit.

 

Input – Resistance thermometer (RTD)
InputDesignationMeasurement range limitsmin. span

to IEC 751

(a = 0.00385)

Pt100

Pt500

Pt1000

-328 to 1562 °F (-200 to 850 °C)

-328 to 482 °F (-200 to 250 °C)

-328 to 482 °F (-200 to 250 °C)

18 °F (10 °C)

18 °F (10 °C)

18 °F (10 °C)

to DIN 43760

(a = 0.00618)

Ni100

Ni500

Ni1000

-76 to 356 °F (-60 to 180 °C)

-76 to 302 °F (-60 to 150 °C)

-76 to 302 °F (-60 to 150 °C)

18 °F (10 °C)

18 °F (10 °C)

18 °F (10 °C)

 Connection type2-, 3- or 4-wire connection cable resistance compensation possible in the 2 wire system (0 to 20 Ω)
 Sensor cable resistancemax. 11 Ω per cable
 Sensor current£ 0.6 mA

 

Input – Resistance transmitter (Ω)
DesignationMeasurement range limits

min. measurem.

range

Resistance (Ω)

10 to 400 Ω

10 to 2000 Ω

10 Ω

100 Ω

 

Input – Thermocouples (TC)
InputDesignationMeasurement range limitsmin. measurement range

to NIST

Monograph

175,

IEC 584

Type B (PtRh30-PtRh6) [1]

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)

32 to 3308 °F (0 to +1820 °C)

-328 to 1679 °F (-200 to + 915 °C)

-328 to 2192 °F (-200 to +1200 °C)

-328 to 2501 °F (-200 to +1372 °C)

-454 to 2372 °F (-270 to +1300 °C)

32 to 3214 °F (0 to +1768 °C)

32 to 3214 °F (0 to +1768 °C)

-328 to 752 °F (-200 to + 400 °C)

900 °F (500 °C)

90 °F (50 °C)

90 °F (50 °C)

90 °F (50 °C)

90 °F (50 °C)

900 °F (500 °C)

900 °F (500 °C)

90 °F (50 °C)

to ASTM

E988

Type C (W5Re-W26Re)

Type D (W3Re-W25Re)

32 to 4208 °F (0 to +2320 °C)

32 to 4523 °F (0 to +2495 °C)

900 °F (500 °C)

900 °F (500 °C)

to DIN 43710

Type L (Fe-CuNi)

Type U (Cu-CuNi)

-328 to 1652 °F (-200 to + 900 °C)

-328 to 1112 °F (-200 to + 600 °C)

90 °F (50 °C)

90 °F (50 °C)

 Cold junctioninternal (Pt100) or external , 32 to 176 °F (0 to 80 °C)
 Accuracy of cold junction± 1.8 °F (± 1 °C)
 Sensor current30 nA

 

Input – Voltage transmitters (mV)
DesignationMeasurement range limitsmin. measurem. range
Millivolt transmitter (mV)-10 to 100 mV5 mV

 

Output – Output (analogue)

Output (analogue)

Output signal

4 to 20 mA, 20 to 4 mA
Transmission behaviortemperature linear, resistance linear, voltage linear
Source impedanceVpower supply – 8 V) / 0.025 A (current output) e. g. (24 V – 8 V)/0.025 A = 640 Ω

Digital Filter

1st degree

0 to 8 s
Input current required≤ 3.5 mA
Current limit≤ 25 mA
Switch on delay4 s (during power up Ia = 3.8 mA)
Reply time1 s

Breakdown information to NAMUR NE 43

Breakdown information is created when the measuring information is invalid or not present

anymore and gives a complete listing of all errors occurring in the measuring system.

  Signal (mA)
Under rangingStandard3.8
Over rangingStandard20.5

Sensor break;

sensor short circuit low

To NAMUR NE 43≤ 3.6

Sensor break;

sensor short circuit high

To NAMUR NE 43≤ 21.5

 

Electrical connection
Power supplyUb = 8 to 35 V DC, polarity protected
Galvanic isolation (In/out)Û = 3.75 kV AC
Allowable rippleUss ≤ 5 V at Ub ≥ 13 V, f max. = 1 kHz

 

Accuracy
Reference conditionsCalibration temperature 73.4 °F ± 9 °F (23 °C ± 5 °C)

 

Accuracy – Resistance thermometer (RTD)
TypeMeasurement accuracy [1]

Pt100, Ni100

Pt500, Ni500

Pt1000, Ni1000

0.36 °F (0.2 °C) or 0.08%

0.9 °F (0.5 °C) or 0.20%

0.54 °F (0.3 °C) or 0.12%

 

Accuracy – Resistance transmitter (Ω)
TypeMeasurement accuracy [1]Measurement range
Resistance (Ω)± 0.1 Ω or 0.08%10 to 400 Ω
± 1.5 Ω or 0.12%10 to 2000 Ω

 

Accuracy – Thermocouples (TC)
TypeMeasurement accuracy [1]

K, J, T, E, L, U

N, C, D

S, B, R MoRe5-MoRe41

typ. 0.9 °F (0.5 °C) or 0.08%

typ. 1.8 °F (1.0 °C) or 0.08%

typ. 3.6 °F (2.0 °C) or 0.08%

Influence of the internal reference junctionPt100 DIN IEC 751 Cl. B

 

Accuracy – Voltage transmitters (mV)
TypeMeasurement accuracy [1]Measurement range
Millivolt transmitter (mV)± 20 uV or 0.08%-10 to 100 mV

 

Influence of power

supply

≤ ±0.01%/V deviation from 24 V [2]
Load influence≤ ±0.02%/100 Ω [2]

[1 ] % is related to the adjusted measurement range (the value to be applied is the greater)

[2] Values refer to the full scale value

Temperature drift

Resistive thermometer (RTD):

Td = ± (8.3 ppm/°F * max. meas. range + 27.8 ppm/°F *

preset meas. range) * Δθ 

Resistive thermometer Pt100:

Td= ±(8.3 ppm/°F * (range end value + 200) + 27.8 ppm/°F *

preset meas. range) * Δθ 

Thermocouple (TC):

Td= ±(27.8 ppm/°F * max. meas. range + 27.8 ppm/°F *

preset meas. range) * Δθ 

Δθ = Deviation of the ambient temperature accord. to the reference

condition (73.4 ° F ± 9 °F)

Long term stability≤ 0.18 °F/Year ( ≤ 0.1 °C/Year) [1] or ≤ 0.05%/Year [1][2]

 

Installation conditions
Installation angleNo limit
Installation areaConnection head accord. to DIN 43 729 Form B; TAF 10 field housing

 

Application conditions – Ambient conditions
Ambient temperature-40 to 185 °F (-40 to +85 °C), for Ex-areas see Ex-certification or control drawing
Storage temperature-40 to 212 °F (-40 to +100 °C)
Climatic classAs per IEC 60 654-1, Class C
Moisture condensationAllowed
Ingress protectionIP 00 / NEMA 4 (IP66) installed in TAF 10 field housing
Vibration protection4g / 2 to 150 Hz according to IEC 60 068-2-6

 

EMC immunity – CE Electromagnetic Compatibility Compliance
The device meets all requirements listed under IEC 61326 Amendment 1, 1998 and NAMUR NE 21. This recommendation is an uniform and practical way of determining whether the devices used in laboratory and process control are immune to interference with an objective to increase its functional safety.
Discharge of static electricityIEC 61000-4-26 kV cont., 8 kV air
Electromagnetic fieldsIEC 61000-4-380 to 1000 Hz, 10 V/m
Burst (signal)IEC 61000-4-41 kV; 2 kV (B)[3]
Transient voltageIEC 61000-4-51 kV unsym./0.5 kV sym.
HF couplingIEC 61000-4-60.15 to 80 Mhz, 10 V

 

Mechanical construction
DimensionsTemperature Head Transmitters 2 | Thermo Sensors
Weightapprox. 1.4 oz (40 g)
Materials

Housing: PC

Potting: PUR

TerminalsCable up to max. 16 AWG, secure screws

[1] Values under reference operating conditions

[2] % refer to the set span. The highest value is valid

[3] self recovery.

Mechanical construction
Temperature Head Transmitters 3 | Thermo SensorsTemperature Head Transmitters 4 | Thermo Sensors
Temperature Head Transmitters 5 | Thermo SensorsTemperature Head Transmitters 6 | Thermo SensorsTemperature Head Transmitters 7 | Thermo SensorsTemperature Head Transmitters 8 | Thermo SensorsTemperature Head Transmitters 9 | Thermo Sensors

 

Display and operating system – Remote operation
Configuration setConfiguration kit TMT 181A-VP
ConfigurationUsing PC program (ReadWin ® 2000)
InterfacePC interface connection cable TTL -/- RS 232 with plug
Configurable parametersSensor 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 (8 characters), output simulation

 

Certification
CE mark

This unit complies with the legal requirements laid out within the EU

regulations.

GLShip building approval (Germanischer Lloyd)
ULRecognized component to UL 3111-1
Hazardous area approvals

FM IS, Class I, Div 1+2, Group A, B, C, D

CSA IS, Class I, Div 1+2, Group A, B, C, D

ATEX II 1G EEx ia IIC T6/5/4

ATEX II 3G EEx nA IIC T4/T5/T6

ATEX II 3D in compliance with EN 50281-1

Other standards and guidelines

IEC 60529: Degrees of protection by housing (IP-Code)

IEC 61010: Safety requirements for electrical measurement, control and

laboratory instrumentation

IEC 61326: Electromagnetic compatibility (EMC requirements)

NAMUR: Standardization association for measurement and control in

chemical and pharmaceutical industries. (www.namur.de)

NEMA: Standardization association for the electrical industry

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