Accessories

Temperature Head Transmitters

Product and Ordering Information
Order Code
HP - (Range) - (Input)
iTEMP PCP TMT 181 Application:
• 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 benefits and 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)
Input Designation Measurement range limits min. 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 type 2-, 3- or 4-wire connection cable resistance compensation possible in the 2 wire system (0 to 20 Ω)
  Sensor cable resistance max. 11 Ω per cable
  Sensor current £ 0.6 mA

Input - Resistance transmitter (Ω)
Designation Measurement range limits min. measurem.
range
Resistance (Ω) 10 to 400 Ω
10 to 2000 Ω
10 Ω
100 Ω

Input - Thermocouples (TC)
Input Designation Measurement range limits min. 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 junction internal (Pt100) or external , 32 to 176 °F (0 to 80 °C)
  Accuracy of cold junction ± 1.8 °F (± 1 °C)
  Sensor current 30 nA

Input - Voltage transmitters (mV)
Designation Measurement range limits min. measurem. range
Millivolt transmitter (mV) -10 to 100 mV 5 mV

Output - Output (analogue)
Output (analogue)
Output signal
4 to 20 mA, 20 to 4 mA
Transmission behavior temperature linear, resistance linear, voltage linear
Source impedance Vpower 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 delay 4 s (during power up Ia = 3.8 mA)
Reply time 1 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 ranging Standard 3.8
Over ranging Standard 20.5
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 supply Ub = 8 to 35 V DC, polarity protected
Galvanic isolation (In/out) Û = 3.75 kV AC
Allowable ripple Uss 5 V at Ub 13 V, f max. = 1 kHz

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

Accuracy - Resistance thermometer (RTD)
Type Measurement 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)
Type Measurement 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)
Type Measurement 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 junction Pt100 DIN IEC 751 Cl. B

Accuracy - Voltage transmitters (mV)
Type Measurement 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 angle No limit
Installation area Connection 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 class As per IEC 60 654-1, Class C
Moisture condensation Allowed
Ingress protection IP 00 / NEMA 4 (IP66) installed in TAF 10 field housing
Vibration protection 4g / 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 electricity IEC 61000-4-2 6 kV cont., 8 kV air
Electromagnetic fields IEC 61000-4-3 80 to 1000 Hz, 10 V/m
Burst (signal) IEC 61000-4-4 1 kV; 2 kV (B)[3]
Transient voltage IEC 61000-4-5 1 kV unsym./0.5 kV sym.
HF coupling IEC 61000-4-6 0.15 to 80 Mhz, 10 V

Mechanical construction
Dimensions
Weight approx. 1.4 oz (40 g)
Materials Housing: PC
Potting: PUR
Terminals Cable 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

Display and operating system - Remote operation
Configuration set Configuration kit TMT 181A-VP
Configuration Using PC program (ReadWin ® 2000)
Interface PC interface connection cable TTL -/- RS 232 with plug
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 (8 characters), output simulation

Certification
CE mark This unit complies with the legal requirements laid out within the EU
regulations.
GL Ship building approval (Germanischer Lloyd)
UL Recognized 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