Endress+Hauser TMS11 Specifications

TI01394T/09/EN/02.19 71456858 2019-10-21

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Technical Information

iTHERM TMS11 MultiSens Linear

Modular TC and RTD multipoint with primary thermowell

Application

• Easy-to-use device with modular design, provided of its own primary thermowell and ready to be installed

• Specifically designed for Oil & Gas and Petrochemical processing industries

• Measuring range:

• Resistance insert (RTD): –200 to 600 °C (–328 to 1 112 °F)

• Thermocouple (TC): –270 to 1 100 °C (–454 to 2 012 °F)

• Static pressure range: Up to 240 bar (3 481 psi). Specific maximum process pressure achievable depending on process type and temperature

• Degree of protection: 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™

Your benefits

• High degree of customization thanks to a modular product design for easy

• Easy integration due to inserts according to standards as per standard IEC 60584,

• Electrical and Pressure Directive compliance for an easy and fast process

• Compliance to different types of protection for use in hazardous locations for a

• Possibility to individually replace inserts, even in operating conditions

• Superior mechanical strength thanks to a primary thermowell for temperature

• Increased safety due to the possibility to continuously monitor the integrity of the

installation, process integration and maintenance

ASTM E230 and IEC 60751

integration

wide and easy process integration

sensors protection in a wide range of process conditions

thermowell thanks to a pressure port during operating conditions

Function and system design

Measuring principle Thermocouples (TC)

Thermocouples are comparatively simple, robust temperature sensors which use the Seebeck effect for temperature measurement: if two electrical conductors made of different materials are connected at a point, a weak electrical voltage can be measured between the two open conductor ends if the conductors are subjected to a thermal gradient. This voltage is called thermoelectric voltage or electromotive force (emf.). Its magnitude depends on the type of conducting materials and the temperature difference between the "measuring point" (the junction of the two conductors) and the "cold junction" (the open conductor ends). Accordingly, thermocouples primarily only measure differences in temperature. The absolute temperature at the measuring point can be determined from these if the associated temperature at the cold junction is known or is measured separately and compensated for. The material combinations and associated thermoelectric voltage/temperature characteristics of the most common types of thermocouple are standardized in the IEC 60584 and ASTM E230/ANSI MC96.1 standards.

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 approx. 300 °C (572 °F). For this reason, thin-film sensors are generally only used for temperature measurements in ranges below 400 °C (752 °F).

iTHERM TMS11 MultiSens Linear

Measuring system

Endress+Hauser offers a complete portfolio of optimized components for the temperature measuring point – everything you need for the seamless integration of the measuring point into the overall facility.

This includes:

• Power supply unit/active barrier

• Configuration units

• Overvoltage protection

For more information, see the brochure 'System Components - Solutions for a Complete Measuring Point' (FA00016K/09)

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iTHERM TMS11 MultiSens Linear

1 2

3 4

HAW56x

1 IN 2

3 OUT 4

HAW56x

3 OUT 4

1 IN 2

HAW56x

3 OUT 4

1 IN 2

HAW56x

3 OUT 4

1 IN 2

Equipment architecture

A0036089

 1 Application example in a reactor.

1 Device configuration with application software FieldCare 2 Commubox 3 PLC 4 Active barrier RN221N (24 VDC, 30 mA) that 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.

5 Surge arrester modules HAW562 for protection of signal lines and components in hazardous areas, e.g.

4 to 20 mA- , PROFIBUS® PA, FOUNDATION Fieldbus™ signal lines. More information on this can be found in the Technical Information →  27

6 Mounted multipoint thermometer with its own primary thermowell, optionally with built-in transmitters in

the junction box for 4 to 20 mA-, HART-, PROFIBUS® PA-, FOUNDATION Fieldbus™ communication or terminal blocks for remote wiring.

The multipoint thermometer belongs to a range of modular product configuration for multipoint temperature detection with a design where subassemblies and components can be managed individually for easy maintenance and spare part ordering.

It consists of the following main sub-assemblies:

• Insert: Composed by individual metal sheathed sensing elements (thermocouples or thermosresistance) protected by the primary thermowell welded to the process connection. In addition, individual guiding tubes or protecting themowells allow inserts replacement during operating conditions. When applicable, each insert can be handled as an individual spare part and ordered via specific standard product order codes (e.g. TSC310, TST310) or special codes. For the specific order code please contact your Endress+Hauser specialist.

• Process Connection: Represented by an ASME or EN flange. It can be provided with pressure port and it might be provided with eyebolts for lifting the device.

• Head: It is composed of a junction box provided with its components such as cable glands, draining valves, earth screws, terminals, head transmitters, etc.

• Head Support Frame: It is designed to support the junction box. Two different types are available:

• Direct mounted support frame

• Three pieces union joint

• Additional Accessories: They can be ordered for any configuration, and they are recommended in case of replaceable sensors configuration (such as pressure transducers, manifolds, valves and fitting).

• Primary Thermowell: It is directly welded to the process connection, designed to guarantee high degree of mechanical protection and corrosion resistance.

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iTHERM TMS11 MultiSens Linear

10c

10b 11

10b

10a

In general, the system measures a linear temperature profile inside the process environment. It is also possible to obtain a three-dimensional temperature profile by installing more than one Multisens Linear (either horizontally, vertically or obliquely).

Design

A0016673

A0036087

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iTHERM TMS11 MultiSens Linear

Description, available options and materials

1: Head 1a: Directly mounted 1b: Remote

2: Support System 2a: With rods and protection cover

2b: With three pieces union joint Support frame for intrinsically safe requirements.

3: Primary thermowell The primary thermowell is made by a tube with calculated and

4: Process connection, flanged according to ASME, or EN standards

5: Insert Mineral insulated grounded and ungrounded thermocouples or RTD

6 Tip design of: 6a: protecting thermowells

6b: guiding tubes The sensors inside the primary thermowell can be kept in the right

7: Eyebolt Lifting device for easy handling during installation phase.

8: Extension cables Cables for electrical connections between the inserts and junction

Hinged or screwed cover junction box for electrical connections. It includes components such as electrical terminals, transmitters and cable glandes.

• 316/316L

• Aluminium alloys

• Other materials on request

Support frame for explosion proof requirements.

316/316L

selected thickness according to reference international standards. It is designed to protect the sensors against harsh process conditions such as dynamic and static loads and corrosion. It is composed of two main zones, one inside the process and the other one outside of the process (thermowell head). The main thermowell goes across the process connection and on the upper part there are compression fitting to allow insert replacement (when possible)

• 316/316L

• 321

• 304/304L

• 310L

Represented by a flange according to international standards, or engineered to satisfy specific process requirements →  13.

• 316 + 316L

• 304/304L

• 310L

• 321

• Other materials on request

(Pt100 wire wound). For details, refer to the Ordering information table

The sensors inside the primary thermowell can be kept in the right measuring location by means of closed-end protecting thermowells which end with:

• welded thermal block discs to ensure the optimal heat transfer thorough the primary thermowell wall and the temperature sensors. Sensors are replaceable.

• individual thermal blocks pressed against the internal wall to ensure the optimal heat transfer between the primary thermowell and the replaceable temperature sensor.

• straight tip.

For details, refer to the Ordering information table

measuring location by means of open-end guiding tubes which end with:

• bimetallic stripes to push the sensor in contact with the internal wall of the main thermowell and allow faster response time. Sensors not replaceable.

• bent tip.

SS 316

box.

• Shielded PVC

• Shielded Hyflon MFA

• Unshielded PVC flying leads

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iTHERM TMS11 MultiSens Linear

Description, available options and materials

9: Optional connection (Pressure Port threaded hole)

10: Protections 10a: Cable conduit system (in case of remote head) 10b: Cable conduit cover 10c: Extension cable cover

11: Compression fitting High performing fittings for the tightness between the thermowell-

Auxiliary connections and fittings for pressure detection.

Cable conduit system: made by flexible polyamide to connect the top of the primary thermowell and the remote junction box. Cable conduit cover: composed of two half shields installed between the top of the primary thermowell and the junction box. Extension cable cover: made by a shaped stainless stell plate fixed to the junction box frame in order to protect the cable connections.

head and the external environment, suitable for a wide range of process fluids and severe combination between temperature and pressure.

Input

Measured variable

Measuring range

Output signal

Temperature (temperature linear transmission behavior)

RTD:

Input Designation Measuring range limits

RTD as per IEC 60751 Pt100 –200 to +600 °C (–328 to +1 112 °F)

Thermocouple:

Input Designation Measuring range limits

Thermocouples (TC) as per IEC 60584, part 1 - using an Endress+Hauser - iTEMP temperature head transmitter

Type J (Fe-CuNi) Type K (NiCr-Ni) Type N (NiCrSi-NiSi)

Internal cold junction (Pt100) Cold junction accuracy: ± 1 K Max. sensor resistance: 10 kΩ

–210 to +720 °C (–346 to +1 328 °F) –270 to +1 150 °C (–454 to +2 102 °F) –270 to +1 100 °C (–454 to +2 012 °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 junction box 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

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iTHERM TMS11 MultiSens Linear

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)

terminal head (flat face) as per DIN EN 50446. Swift and easy operation, visualization and maintenance by PC using operating software, Simatic PDM or AMS. 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. Swift and easy operation, visualization and maintenance using a PC directly from the control panel, e. g. using operating software, Simatic PDM or AMS. 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. Swift and easy operation, visualization and maintenance using a PC directly from the control panel, e.g. using operating software such as ControlCare from Endress +Hauser or NI Configurator from National Instruments. For more information, see the Technical Information.

Advantages of the iTEMP transmitters:

• Dual or single sensor input (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 transmitter, based on Callendar/Van Dusen coefficients

Wiring diagrams

Power supply

• Electrical connecting cables must be smooth, corrosion resistant, easy to be cleaned and inspected, robust against mechanical stresses, no-humidity sensitivity.

• Grounding or shielding connections are possible via ground terminals on the junction box.

Wiring diagrams for TC and RTD connection

A0016712-EN

 2 Wiring diagram of the single sensor input head transmitters (TMT18x)

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iTHERM TMS11 MultiSens Linear

Sensor input 2

Sensor input 1

RTD 4- and 3-wire:

RTD 3-wire:

Bus connection

and supply voltage

Display connection

red

white

red red

red

whitewhite

-200 -100 0 100 200 300 400 500 600°C

0.5

1.0

1.5

2.0

2.5

3.0

- 0.5

- 1.0

- 1.5

- 2.0

- 2.5

- 3.0

Max. deviation (°C)

 3 Wiring diagram of the dual sensor input head transmitters (TMT8x)

A0016711-EN

Performance characteristics

Accuracy

Class Max. tolerances (°C) Characteristics

Cl. AA, former 1/3 Cl. B

Cl. A ± (0.15 + 0.002 · |t|

Cl. B ± (0.3 + 0.005 · |t|

Temperature ranges for compliance with the tolerance classes

Wire wound sensor (WW):

Thin-film version (TF):

Standard –30 to +300 °C 0 to +150 °C

± (0.1 + 0.0017 · |t|

Cl. A Cl. AA

–100 to +450 °C –50 to +250 °C

Cl. A Cl. AA

RTD resistance thermometer as per IEC 60751

)

1) |t| = absolute value °C

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In order to obtain the maximum tolerances in °F, the results in °C must be multiplied by a factor of 1.8.

A0008588-EN

iTHERM TMS11 MultiSens Linear

Permissible deviation limits of thermoelectric voltages from the standard characteristic for thermocouples as per IEC 60584 or ASTM E230/ANSI MC96.1:

Standard Type Standard tolerance Special tolerance

IEC 60584 Class Deviation Class Deviation

1) |t| = absolute value °C

Standard Type Standard tolerance Special tolerance

ASTM E230/ANSI MC96.1

J (Fe-CuNi) 2 ±2.5 °C (–40 to 333 °C)

±0.0075 |t|

K (NiCr-NiAl) N (NiCrSi-NiSi)

J (Fe-CuNi) ±2.2 K or ±0.0075 |t|

K (NiCr-NiAl) N (NiCrSi-NiSi)

2 ±2.5 °C (–40 to 333 °C)

±0.0075 |t|

Deviation, the larger respective value applies

±2.2 K or ±0.02 |t| ±2.2 K or ±0.0075 |t| (0 to 1 260 °C)

(333 to 750 °C)

(333 to 1 200 °C)

1 ±1.5 °C (–40 to 375 °C)

±0.004 |t|

1 ±1.5 °C (–40 to 375 °C)

±0.004 |t|

(0 to 760 °C) ±1.1 K or ±0.004 |t|

(0 to 760 °C)

(–200 to 0 °C)

±1.1 K or ±0.004 |t| (0 to 1 260 °C)

(375 to 750 °C)

(375 to 1 000 °C)

Response time

Shock and vibration resistance

1) |t| = absolute value °C

Response time for the sensor assembly without transmitter. When response time of the complete assembly is requested (including primary thermowell), a dedicated calculation depending on the sensor layout will be preformed.

RTD

Calculated at an ambient temperature of approx. 23 °C by immersing the insert in running water (0.4 m/s flow rate, 10 K excess temperature):

Insert diameter Response time

As an example, in case of thermowell thickness,

3.6 mm (0.14 in), bent guiding tubes design

108 s

Thermocouple (TC)

Calculated at an ambient temperature of approx. 23 °C by immersing the insert in running water (0.4 m/s flow rate, 10 K excess temperature):

Insert diameter Response time

As an example, in case of thermowell thickness,

3.6 mm (0.14 in), bent guiding tubes design

52 s

• RTD: 3G / 10 to 500 Hz according to IEC 60751

• TC: 4G / 2 to 150 Hz according to IEC 60068-2-6

Calibration

Calibration is a service that can be performed on each individual insert, either in order phase, or after multipoint installation (only in case of replaceable sensors).

When calibration shall be performed once the multipoint is installed, please contact the Endress+Hauser service to get full support. Together with the Endress +Hauser service any further activity can be organised to achieve the calibration of the target sensor. In any case it is forbidden to unscrew any threaded component on the process connection under operating conditions (running process), without knowing the pressure inside the primary thermowell.

Calibration involves comparing the measured values of the sensing elements of the multipoint inserts (DUT device under test) with those of a more precise calibration standard using a defined and reproducible measurement method. The aim is to determine the deviation of the DUT measured values from the true value of the measured variable.

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