Endress+Hauser TH11 Specifications

TI00108T/09/EN/14.18 71404930 2018-05-31

Products

Solutions Services

Technical Information

TH11 and TH12

General purpose RTD with terminal head or conductor extension lead wires for process and laboratory applications

Application

The TH11 and TH12 temperature sensors are RTDs designed for use in the process industry or factory automation type of environment. They consist of a measurement probe with a RTD, insulation and sheath. Among other applications the sensors can be used on:

• Heat exchangers, power & recovery area

• Carbon regeneration furnace or dryers

• Flue Gas, compressor stations

• Process reactors

Head transmitter

All Endress+Hauser transmitters are available with enhanced accuracy and reliability compared to directly wired sensors. Easy customizing by choosing one of the following outputs and communication protocols:

• Analog output 4 to 20 mA, with or without HART

• PROFIBUS® PA

• FOUNDATION Fieldbus™

Field transmitter

Temperature field transmitters with HART® or FOUNDATION Fieldbus™ protocol for highest reliability in harsh industrial environments. Backlit display with large measured value, bargraph and fault condition indication for ease of reading.

Your benefits

• High flexibility due to modular assembly with standard terminal heads and customized immersion length

• One source shopping for temperature measurement solutions. World class transmitter with integrated sensor offering for heavy process industry applications. Remove and install straight out of the box!

• Improved galvanic isolation on most devices (2 kV)

• Simplified model structure: Competitively priced, offers great value. Easy to order and reorder. A single model number includes sensor and transmitter assembly for a complete point solution

• All iTEMP transmitters provide long term stability ≤ 0.05 % per year

• Fast response time with reduced/tapered tip form

Function and system design

TH11 RTD with head transmitter mounted inside terminal head

RIA16 field indicator

Power supply RNS221

= 20...253V DC/AC

» 50/60 Hz

Channel 1

Channel 2

24V DC / 30 mA

Memograph M Advanced data manager

Tank

DIN Rail Temp. Transmitter

TH12

°F

Measuring principle Resistance thermometer (RTD)

These resistance thermometers use a Pt100 temperature sensor according to IEC 60751. The temperature sensor is a temperature-sensitive platinum resistor with a resistance of 100 Ω at 0 °C (32 °F) and a temperature coefficient α = 0.003851 °C-1.

There are generally two different kinds of platinum resistance thermometers:

• Wire wound (WW): Here, a double coil of fine, high-purity platinum wire is located in a ceramic support. This is then sealed top and bottom with a ceramic protective layer. Such resistance thermometers not only facilitate very reproducible measurements but also offer good long-term stability of the resistance/temperature characteristic within temperature ranges up to 600 °C (1 112 °F). This type of sensor is relatively large in size and it is comparatively sensitive to vibrations.

• Thin film platinum resistance thermometers (TF): A very thin, ultrapure platinum layer, approx. 1 μm thick, is vaporized in a vacuum on a ceramic substrate and then structured photolithographically. The platinum conductor paths formed in this way create the measuring resistance. Additional covering and passivation layers are applied and reliably protect the thin platinum layer from contamination and oxidation, even at high temperatures.

The primary advantages of thin film temperature sensors over wire wound versions are their smaller sizes and better vibration resistance. A relatively low principle-based deviation of the resistance/ temperature characteristic from the standard characteristic of IEC 60751 can frequently be observed among TF sensors at high temperatures. As a result, the tight limit values of tolerance category A as per IEC 60751 can only be observed with TF sensors at temperatures up to 200 °C (392 °F).

TH11 and TH12

Measuring system

A0016255-EN

 1 Application example

RIA16 Field indicator

The field indicator records an analog measuring signal and shows this on the display. The LC display shows the currently measured value digitally and as a bargraph with limit value violation signalling. The indicator is looped into the 4 to 20 mAcircuit and obtains the required energy from there. Details see Technical Information. →  19

RNS221 Power supply

The power supply unit (24 VDC, 30 mA) has two galvanically isolated outputs for supplying voltage to loop powered transmitters. The two channel device has a wide-range input for mains power, 20 to 253 VDC/AC, 50/60 Hz to be used in any electrical circuit. Details see Technical Information. →  19. The device is an UL recognized component.

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TH11 and TH12

RSG45 Memograph M, advanced data manager

Multichannel data recording system with multicolor TFT display (178 mm / 7" screen size), internal memory, external memory (SD card and USB stick), galvanically isolated universal inputs (U, I, TC, RTD, pulse, frequency), HART® inputs, digital inputs, transmitter power supply, limit relays, digital and analog outputs, communication interfaces (USB, Ethernet, RS232/485), optionally available with Modbus, Profibus DP or PROFINET I/O or EtherNet/IP. Details see Technical Information. →  19

Equipment architecture

Measurement range

Output signal

The single and duplex element RTDs are designed to measure temperature in a variety of process and laboratory applications. These RTDs are specifically designed for use in two different process temperature ranges and they will provide accurate and repeatable temperature measurement through a broad range of –200 to 600 °C (–328 to 1 112 °F). Low range thin film RTDs –50 to 200 °C (–58 to 392 °F) are constructed using silver plated copper internal leads, PTFE wire insulations with potting compounds to resist moisture penetration. High range RTDs –200 to 600 °C (–328 to 1 112 °F) are constructed with nickel internal leads inside swaged MgO insulated cable to allow higher temperature measurements at the RTD element and to provide higher temperature lead protection along the sheath.

Construction Model code (class and type of sensor) Maximum range

Low temperature range (TF - thin film sensor)

High temperature range (WW - wire wound sensor)

TH11-_ _ _ (A/C/E/G/J/L) _ _ _ _ _ _ –50 to +200 °C

TH12-_ _ _ (A/C/E/G/J/L) _ _ _ _ _ _

TH11-_ _ _ (B/D/F/H/K/M) _ _ _ _ _ _ –200 to +600 °C

TH12-_ _ _ (B/D/F/H/K/M) _ _ _ _ _ _

(–58 to +392 °F)

(–328 to +1 112 °F)

Output

Generally, the measured value can be transmitted in one of two ways:

• Directly-wired sensors - sensor measured values forwarded without a transmitter.

• Via all common protocols by selecting an appropriate Endress+Hauser iTEMP temperature transmitter. All the transmitters listed below are mounted directly in the terminal head or as field transmitter and wired with the sensory mechanism.

Family of temperature transmitters

Thermometers fitted with iTEMP transmitters are an installation-ready complete solution to improve temperature measurement by significantly increasing accuracy and reliability, when compared to direct wired sensors, as well as reducing both wiring and maintenance costs.

PC programmable head transmitters

They offer a high degree of flexibility, thereby supporting universal application with low inventory storage. The iTEMP transmitters can be configured quickly and easily at a PC. Endress+Hauser offers free configuration software which can be downloaded from the Endress+Hauser Website. More information can be found in the Technical Information.

HART® programmable head transmitters

The transmitter is a 2-wire device with one or two measuring inputs and one analog output. The device not only transfers converted signals from resistance thermometers and thermocouples, it also transfers resistance and voltage signals using HART® communication. It can be installed as an intrinsically safe apparatus in Zone 1 hazardous areas and is used for instrumentation in the terminal head (flat face) as per DIN EN 50446. Swift and easy operation, visualization and maintenance using universal device configuration tools like FieldCare, DeviceCare or FieldCommunicator 375/475. For more information, see the Technical Information.

PROFIBUS® PA head transmitters

Universally programmable head transmitter with PROFIBUS® PA communication. Conversion of various input signals into digital output signals. High accuracy over the complete ambient temperature range. The configuration of PROFIBUS PA functions and of device-specific parameters is performed via fieldbus communication. For more information, see the Technical Information.

FOUNDATION Fieldbus™ head transmitters

Universally programmable head transmitter with FOUNDATION Fieldbus™ communication. Conversion of various input signals into digital output signals. High accuracy over the complete

Endress+Hauser 3

TH11 and TH12

RTD

3-wire

4-wire

Power supply head transmitter and analog output 4 to 20 mA, or bus connection

(red) (red) (red) (red)

(white) (white)

(white)

ambient temperature range. All transmitters are released for use in all important process control systems. The integration tests are performed in Endress+Hauser's "System World". For more information, see the Technical Information.

Advantages of the iTEMP transmitters:

• Dual or single sensor input (optionally for certain transmitters)

• Pluggable display (optionally for certain transmitters)

• Unsurpassed reliability, accuracy and long-term stability in critical processes

• Mathematical functions

• Monitoring of the thermometer drift, sensor backup functionality, sensor diagnostic functions

• Sensor-transmitter matching for dual sensor input transmitters, based on Callendar/Van Dusen coefficients

Field transmitter

Field transmitter with HART® or FOUNDATION Fieldbus™ communication and backlit display. Can be read easily from a distance, in sunlight and at night. Large measurement value, bargraph and fault indication displayed. Benefits are: dual sensor input, highest reliability in harsh industrial environments, mathematic functions, thermometer drift monitoring and sensor back-up functionality, corrosion detection.

Galvanic isolation

Terminal assignment

Galvanic isolation of Endress+Hauser iTEMP transmitters

Transmitter type Sensor

TMT181 PCP Û = 3.75 kV AC

TMT182 HART® U = 2 kV AC

TMT162 HART® Field transmitter U = 2 kV AC

TMT82 HART®

U = 2 kV ACTMT84 PA

TMT85 FF

Power supply

Type of sensor connection TH11

Head mounted transmitter TMT18x (single input)

A0016433-EN

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TH11 and TH12

Sensor input 2

Sensor input 1

RTD 4- and 3-wire:

RTD 3-wire:

Bus connection

and supply voltage

Display connection

red

white

red

white

(black)

(green)

RTD

5 6

RTD

(black) (black)

4-wire

3-wire

Power supply field transmitter and analog output 4 to 20 mA or bus connection

Sensor 1

Sensor 2 (not TMT142)

Sensor 1

Sensor 2 (not TMT142)

(white) (red) (white) (red)

(green)

Head mounted transmitter TMT8x (dual input)

A0029556-EN

Field mounted transmitter

Endress+Hauser 5

A0024961-EN

Terminal block mounted

3-wire single

2 x 3-wire single

Outside screw

4-wire single

W5 = White5

W3 = White3

G4 = Green4

R3 = Red3

R2 = Red2

B6 = Black6

R1 = Red1

B5 = Black5

W6 = White6

W4 = White4

R3 = Red3

R1 = Red1

Sensor 2

Sensor 1

Bus connection and supply voltage

TH11 and TH12

A0025284-EN

Integrated overvoltage protection

The integrated overvoltage protection module can be ordered as an optional extra

. The module protects the electronics from damage from overvoltage. Overvoltage occurring in signal cables (e.g. 4 to 20 mA, communication lines (fieldbus systems) and power supply is diverted to ground. The functionality of the transmitter is not affected as no problematic voltage drop occurs.

Connection data:

Maximum continuous voltage (rated voltage) UC = 42 V

Nominal current I = 0.5 A at T

Surge current resistance

• Lightning surge current D1 (10/350 µs)

• Nominal discharge current C1/C2 (8/20 µs)

• I

• In = 5 kA (per wire)

Temperature range –40 to +80 °C (–40 to +176 °F)

Series resistance per wire 1.8 Ω, tolerance ±5 %

= 80 °C (176 °F)

amb.

= 1 kA (per wire)

imp

In = 10 kA (total)

 2 Electrical connection of the overvoltage protection

1) Available for the field transmitter with HART® 7 specification

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A0033027-EN

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