Endress+Hauser T13, T15 Specifications

TI00126R/09/EN/14.18 71404948 2018-05-31

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Technical Information

T13, T14 and T15

Explosion proof RTD assemblies in thermowells with spring loaded insert and enclosure for process industry

Application

• Heavy duty applications

• The sensor assemblies can be used in process industries such as: – Chemicals – Petrochemical – Refineries – Offshore platforms

• Measuring range: –200 to 600 °C (–328 to 1 112 °F)

• Protection class: IP66/67

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

• 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

• FM/CSA XP Class I, Div. 1 approved temperature assemblies for maximum safety

• One source shopping for temperature measurement solutions. World class

• 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

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

transmitter with integrated sensor offering for heavy process industry applications

and reorder. A single model number includes sensor, thermowell and transmitter assembly for a complete point solution

Function and system design

= 20-250V DC/AC

» 50/60Hz

4...20 mA

24V DC / 30 mA

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).

T13, T14 and T15

Measuring system

 1 Application example

1 Mounted thermometer with head transmitter installed. 2 RIA15 process display - The display unit records the analog measuring signal from the head transmitter and

shows this on the display. The LC display shows the current measured value in digital form and as a bar graph indicating a limit value violation. The process display unit is integrated in the 4 to 20 mA or HART® loop and is powered directly from the current loop. Optionally up to four of a sensor's HART® process variables can be displayed. More information on this can be found in the Technical Information, see "Documentation".

3 Active barrier RN221N - The RN221N (24 VDC, 30 mA) active barrier has a galvanically isolated output for

supplying voltage to loop-powered transmitters. The universal power supply works with an input supply voltage of 20 to 250 V DC/AC, 50/60 Hz, which means that it can be used in all international power grids. More information on this can be found in the Technical Information, see "Documentation".

A0024883

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T13, T14 and T15

Input

Measurement range

Output signal

Construction Model code (class and type of sensor) Max. measurement range

T13-_ _ _ _ _ (A/C/E/G/J/L) _ _ _ _ _

Low temperature range

T15-_ _ _ (A/C/E/G/J/L) _ _ _ _ _

T13-_ _ _ _ _ (B/D/F/H/K/M) _ _ _ _ _

High temperature range

T15-_ _ _ (B/D/F/H/K/M) _ _ _ _ _ _

Options J, K, L, M are duplex platinum elements of two sensors inside the same sheath.

–50 to 200 °C (–58 to 392 °F)T14-_ _ _ _ _ (A/C/E/G/J/L) _ _ _ _ _

–200 to 600 °C (–328 to 1 112 °F)T14-_ _ _ _ _ (B/D/F/H/K/M) _ _ _ _ _

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 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

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T13, T14 and T15

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)

• 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

Power supply

Type of sensor connection

Head mounted transmitter TMT18x (single input)

A0016433-EN

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T13, T14 and T15

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

T13, T14 and T15

A0025284-EN

The blocks and transmitters are shown as they sit inside the heads in reference to the conduit opening.

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

T13, T14 and T15

Grounding

The device must be connected to the potential equalization. The connection between the housing and the local ground must have a minimum cross-section of 4 mm2 (13 AWG) . All ground connections must be secured tightly.

Wire specifications

24 AWG, 19 strand silver plated copper with 0.025 mm (0.010 in) PTFE extruded outer.

Electrical connection

Flying leads, standard 3" for wiring in terminal head, head mounted transmitter or terminal block mounted

Flying leads, 5½" for wiring with TMT162 or TMT142 assemblies

Design of leads

Flying leads 3" or 5½" with brass crimped sleeves

A0026119

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Performance characteristics

T13, T14 and T15

Reference conditions

Response time

These data are relevant for determining the accuracy of the temperature transmitters used. More information on this can be found in the Technical Information of the iTEMP temperature transmitters.

63% response time per ASTM E644

RTD assembly T15 without thermowell

Construction

High temperature range 3 s

Low temperature range 9 s

Response time for the sensor assembly without transmitter.

Response time examples for RTD assemblies with thermowell T13 and T14

Construction Stepped thermowell Tapered thermowell Straight thermowell (¾")

High temperature range 20 s 25 s 30 s

Low temperature range 25 s 30 s 35 s

Response times for RTD assemblies with thermowell are provided for general design guidance without transmitter.

When the temperature of a process media changes, the output signal of a RTD assembly follows this change after a certain time delay. The physical cause is the time related to heat transfer from the process media through the thermowell and the insert to the sensor element (RTD). The manner in which the reading follows the change in temperature of the assembly over time is referred to as the response time. Variables that influence or impact the response time are:

• Wall thickness of thermowell

• Spacing between RTD insert and thermowell

• Sensor packaging

• Process parameters such as media, flow velocity, etc.

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