BA01705T/09/EN/04.23-00
71637643
2023-09-28

Products

Solutions

Services

Operating Instructions
iTHERM TMS21
MultiSens Slim
Minimally invasive, flexible TC multipoint thermometerfor petrochemical and chemical applications

Table of contents

iTHERM TMS21 MultiSens Slim

Table of contents
1

About this document . . . . . . . . . . . . . . . . 3

10

1.1
1.2

Document function . . . . . . . . . . . . . . . . . . . . . 3
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

10.1 Device-specific accessories . . . . . . . . . . . . . . . 23
10.2 Communication-specific accessories . . . . . . . . 25
10.3 Service-specific accessories . . . . . . . . . . . . . . . 25

2

Basic safety instructions . . . . . . . . . . . . 5

2.1
2.2
2.3
2.4
2.5

Requirements for the personnel . . . . . . . . . . . . 5
Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Workplace safety . . . . . . . . . . . . . . . . . . . . . . . 6
Operational safety . . . . . . . . . . . . . . . . . . . . . . 6
Product safety . . . . . . . . . . . . . . . . . . . . . . . . . 7

3

Product description . . . . . . . . . . . . . . . . . 7

3.1

Product design . . . . . . . . . . . . . . . . . . . . . . . . . 7

4Incoming acceptance and productidentification . . . . . . . . . . . . . . . . . . . . . . . 9

4.1
4.2
4.3
4.4

Incoming acceptance . . . . . . . . . . . . . . . . . . . . 9
Product identification . . . . . . . . . . . . . . . . . . . 10
Storage and transport . . . . . . . . . . . . . . . . . . 10
Certificates and approvals . . . . . . . . . . . . . . . 11

5

Mounting procedure . . . . . . . . . . . . . . . 11

5.1
5.2
5.3

Installation conditions . . . . . . . . . . . . . . . . . . 11
Mounting the device . . . . . . . . . . . . . . . . . . . 11
Post-mounting checks . . . . . . . . . . . . . . . . . . 14

6

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.1
6.2
6.3
6.4
6.5
6.6

Quick wiring guide . . . . . . . . . . . . . . . . . . . . . 15
Connecting the sensor cables . . . . . . . . . . . . . 16
Connecting the power supply and signal
cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Shielding and Grounding . . . . . . . . . . . . . . . . 18
Ensuring the degree of protection . . . . . . . . . . 18
Post-connection check . . . . . . . . . . . . . . . . . . 19

7

Commissioning . . . . . . . . . . . . . . . . . . . . 19

7.1
7.2
7.3

Preliminaries . . . . . . . . . . . . . . . . . . . . . . . . . 19
Function check . . . . . . . . . . . . . . . . . . . . . . . 20
Switching on the device . . . . . . . . . . . . . . . . . 21

8

Diagnostics and troubleshooting . . . 21

8.1

General troubleshooting . . . . . . . . . . . . . . . . . 21

9Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

9.1
9.2
9.3
9.4
9.5

General information . . . . . . . . . . . . . . . . . . . 22
Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Endress+Hauser services . . . . . . . . . . . . . . . . 22
Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2

11

Accessories . . . . . . . . . . . . . . . . . . . . . . . 23

Technical data . . . . . . . . . . . . . . . . . . . . 26

11.1 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
11.2 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
11.3 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . 27
11.4 Performance characteristics . . . . . . . . . . . . . . 28
11.5 Mounting procedure . . . . . . . . . . . . . . . . . . . 30
11.6 Environment . . . . . . . . . . . . . . . . . . . . . . . . . 32
11.7 Mechanical construction . . . . . . . . . . . . . . . . 32
11.8 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
11.9 Certificates and approvals . . . . . . . . . . . . . . . 37
11.10 Documentation . . . . . . . . . . . . . . . . . . . . . . . 37

Endress+Hauser

iTHERM TMS21 MultiSens Slim

About this document

1

About this document

1.1

Document function

These Operating Instructions contain all the information required in the various life cycle
phases of the device: from product identification, incoming acceptance and storage, toinstallation, connection, operation and commissioning, through to troubleshooting,
maintenance and disposal.

1.2

Symbols

1.2.1

Safety symbols

DANGER

This symbol alerts you to a dangerous situation. Failure to avoid this situation will result inserious or fatal injury.
WARNING

This symbol alerts you to a dangerous situation. Failure to avoid this situation can result inserious or fatal injury.
CAUTION

This symbol alerts you to a dangerous situation. Failure to avoid this situation can result inminor or medium injury.
NOTICE

This symbol contains information on procedures and other facts which do not result inpersonal injury.

1.2.2

Electrical symbols
SymbolMeaning
Direct current
Alternating current
Direct and alternating current
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded via agrounding system.
Protective earth (PE)Ground terminals that must be connected to ground prior to establishing any otherconnections.
The ground terminals are located on the interior and exterior of the device:• Interior ground terminal: protective earth is connected to the mains supply.
• Exterior ground terminal: device is connected to the plant grounding system.

1.2.3
SymbolMeaning

SymbolMeaning

1, 2, 3,...

Item numbers

1. , 2. , 3. …

Series of steps

A, B, C, ...

Views

-

Endress+Hauser

Symbols in graphics

Hazardous area

A-A, B-B, C-C, ...

.

Sections
Safe area (non-hazardous area)3

About this document

iTHERM TMS21 MultiSens Slim

1.2.4

Symbols for certain types of information
SymbolMeaning
Permitted
Procedures, processes or actions that are permitted.
Preferred
Procedures, processes or actions that are preferred.
Forbidden
Procedures, processes or actions that are forbidden.
Tip
Indicates additional information.
Reference to documentation
Reference to pageA

Reference to graphic
Notice or individual step to be observed
1. , 2. , 3. …

Series of steps
Result of a step
Help in the event of a problem
Visual inspection

1.2.5

Documentation

For an overview of the scope of the associated Technical Documentation, refer to thefollowing:• Device Viewer (www.endress.com/deviceviewer): Enter the serial number from thenameplate• Endress+Hauser Operations app: Enter serial number from nameplate or scanmatrix code on nameplate.
Document function
The following documentation may be available depending on the version ordered:

4

Document type

Purpose and content of the document

Technical Information (TI)

Planning aid for your device
The document contains all the technical data on the device and provides
an overview of the accessories and other products that can be ordered forthe device.

Brief Operating Instructions (KA)

Guide that takes you quickly to the 1st measured value
The Brief Operating Instructions contain all the essential informationfrom incoming acceptance to initial commissioning.

Operating Instructions (BA)Your reference document
The Operating Instructions contain all the information that is required in
the various phases of the life cycle of the device: from productidentification, incoming acceptance and storage, to mounting,connection, operation and commissioning through to troubleshooting,
maintenance and disposal.

Description of Device Parameters(GP)

Reference for your parameters
The document provides a detailed explanation of each individual
parameter. The description is aimed at those who work with the device
over the entire life cycle and perform specific configurations.

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Basic safety instructions

Document type

Purpose and content of the document

Safety Instructions (XA)

Depending on the approval, safety instructions for electrical equipment inhazardous areas are also supplied with the device. The Safety Instructions
are an integral part of the Operating Instructions.
Information on the Safety Instructions (XA) relevant to the device is provided
on the nameplate.

Supplementary device-dependent
documentation (SD/FY)

1.2.6

Always comply strictly with the instructions in the relevant
supplementary documentation. The supplementary documentation is an
integral part of the device documentation.

Registered trademarks

FOUNDATION™ Fieldbus
Registration-pending trademark of the FieldComm Group, Austin, Texas, USA
HART®
Registered trademark of the FieldComm Group, Austin, Texas, USA
PROFIBUS®
PROFIBUS and the associated trademarks (The Association Trademark, the Technology
Trademarks, the Certification Trademark and the Certified by PI Trademark) are registeredtrademarks of the PROFIBUS User Organization e.V. (Profibus User Organization),
Karlsruhe - Germany

2

Basic safety instructions

Instructions and procedures in the Operating Instructions may require special precautions
to ensure the safety of the personnel performing the operations. Information that
potentially raises safety issues is indicated by safety pictograms and symbols. Please referto the safety instructions before performing an operation preceded by pictograms andsymbols. Although the information provided herein is believed to be accurate, be advisedthat the information contained herein is NOT a guarantee of satisfactory results.
Specifically, this information is neither a warranty nor guarantee, expressed or implied,regarding performance. Please note that the manufacturer reserves the right to change
and/or improve the product design and specifications without notice.

2.1

Requirements for the personnel

The personnel for installation, commissioning, diagnostics and maintenance must fulfill
the following requirements:‣ Trained, qualified specialists must have a relevant qualification for this specific function
and task.
‣ Are authorized by the plant owner/operator.
‣ Are familiar with federal/national regulations.
‣ Before starting work, read and understand the instructions in the manual andsupplementary documentation as well as the certificates (depending on theapplication).
‣ Follow instructions and comply with basic conditions.
The operating personnel must fulfill the following requirements:‣ Are instructed and authorized according to the requirements of the task by the facility'sowner-operator.
‣ Follow the instructions in this manual.

Endress+Hauser

5Basic safety instructions

iTHERM TMS21 MultiSens Slim

2.2

Intended use

The product is intended to measure the temperature profile inside a reactor, vessel or pipe
through thermocouple technology.
The manufacturer shall not be liable for harm caused by improper or non-designated use.
The product has been designed according to the following conditions:
Condition

Description

Internal pressure

The design of joints, threaded connections and sealing elements has been
executed as a function of the maximum working pressure inside the reactor.

Operating temperature

The materials used were chosen according to the operating and design
minimum and maximum temperatures. Thermal displacement has been taken
into account to avoid intrinsic stresses and to ensure proper integration
between the instrument and the plant. Specific care has to be taken when the
instrument’s thermowell is fixed to the plant internals.

Media

The choice of dimensions and, above all, material will minimize the following
signs of wear:• distributed and localized corrosion,• erosion and abrasion,• corrosion phenomena due to uncontrolled and unpredictable chemical
reactions
Specific process fluids analysis is necessary to properly ensure the maximum
operating life of the device, through proper material selection.

Fatigue

Cyclic loads during operations are not foreseen.

Vibrations

The sensing elements can be subjected to vibrations, due to high immersion
lengths from the constraint located in the process connections. This vibrations
can be minimized by properly selecting the route of the thermowell into theplant, by fixing it on internals by means of accessories like clips and end tips.
The extension neck has been designed for withstanding vibratory loads topreserve the junction box from cyclic loading, and to avoid the unscrewing of
the threaded components.

Mechanical stress

The maximum stress on the measuring device multiplied by a safety factor is
guaranteed to stay below the yielding stress of the material, for every working
condition of the plant.

Ambient conditions

The junction box (with and without head transmitters), wires, cable glands andother fittings has been selected to work within the allowed ranges in terms ofexternal temperature.

2.3

Workplace safety

When working on and with the device:‣ Wear the required personal protective equipment as per national regulations.

2.4

Operational safety

Damage to the device!

‣ Operate the device in proper technical condition and fail-safe condition only.
‣ The operator is responsible for the interference-free operation of the device.
Modifications to the device
Unauthorized modifications to the device are not permitted and can lead to unforeseeable
dangers!
‣ If modifications are nevertheless required, consult with the manufacturer.

6

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Product description

RepairTo ensure continued operational safety and reliability:‣ Carry out repairs on the device only if they are expressly permitted.
‣ Observe federal/national regulations pertaining to the repair of an electrical device.
‣ Use only original spare parts and accessories.

2.5

Product safety

This measuring device is designed in accordance with good engineering practice to meetstate-of-the-art safety requirements, has been tested, and left the factory in a condition inwhich it is safe to operate.
It meets general safety standards and legal requirements. It also complies with the EU
directives listed in the device-specific EU Declaration of Conformity. The manufacturer
confirms this by affixing the CE mark to the device.

3

Product description

3.1

Product design

The new iTHERM MultiSens Slim has an innovative design able to allow a wide variety ofoptions in terms of materials selection, nominal diameters and number of measuring
points. In addition a portfolio of selectable accessories (not in contact with the process)individually managed for easy maintenance and spare part ordering, like adapters andconduits, is available.
It consists of five main sub-assemblies:• Extension: it consists of a threaded bushing for sealed electrical connections, matched toan adapter from which flexible conduit containing the extension cables.
• Main bushing and reinforcing sleeve: to seal and protect electrical junctions and toadjust immersion length.
• Process connection: represented by a compression fitting. When necessary, an ASME or
EN flange is available on request.
Other standards or connection types can be offered on request. The flanges are provided
with welded compression fitting for process tightness.
• Thermowell: with reinforcing sleeve.
• Insert: composed of metal sheathed sensing measuring elements (thermocouples),extension cable and transition bushing. The sensing elements are mounted inside athermowell with a small pipe diameter.
Part of the thermowell can be a flexible hose to guarantee additional bendability andthus better positioning of the probe in the process (above all in the case of misalignment
between installation nozzle and the distribution of measuring points).
• Additional accessories: Components that can be ordered independently from theselected product configuration, such as junction boxes and transmitters, able to fit withall the already installed customer devices.
In general, the system measures the temperature profile in the process environment using
several sensors. These are connected with a suitable process connection, which guarantees
the tightness of the process. Externally, the extension cables (protected by the conduit) are
wired into the junction box, which can be installed integrated or remote (optional).
Some of the options listed in this document may not be available in your country.
Please contact your local Endress+Hauser representative.

Endress+Hauser

7

Product description

iTHERM TMS21 MultiSens Slim

Device type

Description
1: Extension

6

Flexible conduit to protect extension cables against environmental
pollutants and phenomena (such as abrasion, moisture, salt).
Material:• Polyamide• Metal (for Atex version)• Other materials on request
IP68 degree is guaranteed through the selected adapters.

1

2: Mainbushing

2a
2

3

7

2a:
Reinforcing
sleeve3: Processconnection

High-pressure compression fitting to guarantee tightness
between the process and the external environment. For many
media and different combinations of high temperatures andpressures.
In the case of a flange, the process connection is welded on theflange (standard). Other versions available on request.

4: ThermowellAnnealed tube used as protective sheath for sensing elements,
inserted into the process.

4a: Flexible
thermowellpart

Annealed tube provided of an upper flexible part (corrugatedconduit) to allow to reach different paths into the installation
environment.

5: Inserts

Not replaceable grounded or ungrounded thermocouple insertswith high accuracy measurement performance, long-term stability
and reliability.

6: Extension
cablesFor electrical connections between the inserts and junction box.

7: Groundterminal

For electric sensors grounding

4a
2a
3
2a

4

4
5

A0033069

Used to seal and protect electrical junctions and to adjust
immersion length.

• Shielded PVC• Shielded or unshielded FEP

A0030865

The modular multipoint thermometer is characterized by the following possible main
configurations:• Linear configuration• Flexible configuration

3.1.1

Number of inserts

Maximum number of inserts for every combination of thermowell and insert diameter
Thermowell OD in mm (in)3.2 (0.13)
Insert diameter in mm (in)1)

8

6 (0.24)

6.35 (0.25)

8 (0.31)1)

9.5 (0.37)
59 1)

0.5 (0.02)

8

28

22

46

0.8 (0.03)

3

15

12

24

30

1 (0.04)

2

10

8

18

22

1.5 (0.06)

-

6

4

8

12

For this configuration the main bushing has to be specially engineered

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Incoming acceptance and product identification

2

1

A00338481
1
2

Main configuration possibilities
Vertical installation with rigid configuration
Installation with flexible configuration

4

Incoming acceptance and productidentification

4.1

Incoming acceptance

Proceed as follows on receipt of the device:

Endress+Hauser

1.

Check whether the packaging is intact.

2.

If damage is discovered:
Report all damage immediately to the manufacturer.

3.

Do not install damaged components, as the manufacturer cannot otherwise
guarantee the material resistance or compliance with the original safety
requirements, and can also not be held responsible for the consequences that may
result.

4.

Compare the scope of delivery against the contents of your order.

5.

Remove all the packaging material used for transportation.

9

Incoming acceptance and product identification

iTHERM TMS21 MultiSens Slim

6.

Do the data on the nameplate match the ordering information on the delivery note?

7.

Are the technical documentation and all other necessary documents provided, e.g.
certificates?
If one of the conditions is not satisfied, contact your Sales Center.

4.2

Product identification

The following options are available for identification of the device:• Nameplate specifications• Enter the serial number from the nameplate in the Device Viewer(www.endress.com/deviceviewer): all the information about the device and an overview
of the Technical Documentation supplied with the device are displayed.
• Enter the serial number on the nameplate into the Endress+Hauser Operations App orscan the 2-D matrix code (QR code) on the nameplate with the Endress+Hauser
Operations App: all the information about the device and the technical documentation
pertaining to the device is displayed.

4.2.1

Nameplate

The right device?
The nameplate provides you with the following information on the device:• Manufacturer identification, device designation• Order code
• Extended order code
• Serial number• Tag name (TAG)• Technical values: supply voltage, current consumption, ambient temperature,communication-specific data (optional)• Degree of protection• Approvals with symbols‣ Compare the information on the nameplate with the order.
4.2.2

Name and address of manufacturer

Name of manufacturer:

Endress+Hauser Wetzer GmbH + Co. KG

Address of manufacturer:

Obere Wank 1, D-87484 Nesselwang or www.endress.com

4.3

Storage and transport

Storage temperature: –40 to +85 °C (–40 to +185 °F)
Maximum relative humidity: < 95 % as per IEC 60068-2-30
Pack the device for storage and transportation in such a way that it is reliably
protected against impact and external influences. The original packaging offers thebest protection.
Avoid the following environmental influences during storage:• direct sunlight• proximity to hot objects• mechanical vibration• aggressive media

10

Endress+Hauser

iTHERM TMS21 MultiSens Slim

4.4

Mounting procedure

Certificates and approvals

Current certificates and approvals for the product are available at www.endress.com on therelevant product page:1.

Select the product using the filters and search field.

2.

Open the product page.

3.

Select Downloads.

5

Mounting procedure

5.1

Installation conditions

LWARNING
Failure to follow these installation guidelines could result in serious or fatal injury‣ Make sure only qualified personnel perform the installation.
LWARNING

Explosions could result in serious or fatal injury‣ If junction box is included, do not remove the junction box cover in explosive
atmospheres when the circuit is live.
‣ Before connecting any additional electric and electronic device in an explosive
atmosphere, make sure the instruments in the loop are installed in accordance withintrinsically safe or non incendive field wiring practices.
‣ Verify that the operating atmosphere of the transmitters is consistent with theappropriate hazardous locations certifications.
‣ All covers and threaded components must be fully engaged to meet explosion-proof
requirements.

LWARNING
Process leaks could result in serious or fatal injury‣ Do not release screwed parts while in operation. Install and tighten the fittings before
applying pressure.
NOTICE
Additional loads and vibrations from other plant components can affect the operationof the sensor elements.
‣ Is it not allowed to apply additional loads or external moments to the system comingfrom the connection with another system not foreseen from installation plan.
‣ The system is not suitable for being installed in locations where vibrations are present.
The deriving loads can undermine the sealing of the junctions and damage theoperation of the sensing elements.
‣ It will be care of the final user to verify the installation of suitable devices in order toavoid the overcoming of the admitted limits.
‣ For the environment conditions please refer to the technical data →  32

5.2

Mounting the device

The following instructions must be followed for proper installation of the device.

Endress+Hauser

11

Mounting procedure

iTHERM TMS21 MultiSens Slim

1.

A0033274

Place the gasket between the flanged nozzle and the flange of the device provided
with a compression fitting (after checking the cleanliness of gasket seats on theflanges). If the process connection does not include a flange, place the compression
fitting on the intended connection and tighten or weld it.
2.

A0033275

Insert the bolts through the holes on the flange and screw them in with the nuts but
do not fully tighten them.
3.

A0033276

Insert the final bolts through the holes on the flange and tighten them cross-wiseusing an appropriate tool and method (i.e. controlled tensioning).

12

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Mounting procedure

4.

A0033277

Check if the compression fitting is provided with all the necessary sealing metallic
gaskets.
5.

Place the device on the nozzle and guide the probe through the compression fitting.
Avoid any deformation of the thermowell and the reinforcement bushing.

6.

A0033278

Adjust the immersion length of the probe by sliding the measuring system along thereinforcing sleeve.
7.

1A0033279

1
A0033280

Hold the measuring system still and tighten the compression fitting. Ensure that theseal is formed on the reinforcement bushing. If the gage (1) does not fit into the gap,
the fitting is sufficiently tightened. If the gage fits into the gap, additional tightening
is required.
8.

Endress+Hauser

When installing an existing thermowell, an internal inspection of the thermowell isrecommended to check if any internal encumbrance is present before starting with
the insertion activities of the whole device. While installing the measurement
system, avoid any friction during installation, specifically avoid spark generation.
When accessories like spacers and/or centered parts are provided make sure that no
distortions occur and the original geometry and position is maintained.

13

Mounting procedure

iTHERM TMS21 MultiSens Slim

9.

When the installation is in direct contact with the process, ensure that any appliedexternal load does not generate deformations and strains on the probe and on thesealing welding.

10. Guide the extension (or compensating) cables through the cable glands of thejunction box (if provided).
11. If the route for laying the extension conduit is fully defined, secure the conduit
permanently onto the main bushing and the junction box. Ensure that no axial
movement is possible. Note: When bending the conduit, observe a minimum radiusof 1.5 times its external diameter.
12. Tighten the cable glands on the junction box.
13. Connect the compensating cables to the junction box terminals or transmitters.
Follow the supplied wiring instructions. This is the only way to ensure that thecorrect TAG numbers of the cables are connect to the correct TAG numbers of theconnectors. Note: The electrical connection must be made with the correctcompensating cable.
NOTICE
After mounting, perform a few simple checks on the installed thermometric system.
‣ Check the tightness of the threaded connections. If any part is loose, tighten it applying
the proper torque.
‣ Check for correct wiring, test the electrical continuity of the thermocouples (warming
up the thermocouples' measuring point, when feasible) and then verify the absence ofshort-circuits.

5.3

Post-mounting checks

Before commissioning the measuring system make sure that all final checks have been
carried out:
Device condition and specifications
Is the device undamaged (visual check)?

Do the ambient conditions match the device specification?
For example:• Ambient temperature range• Proper conditions



Are the threaded components undeformed?



Are the gaskets and sealing components not permanently deformed?

Installation

14

Is the equipment aligned with the nozzle axis?



Are the gasket seats of flanges clean? (If applicable)Is the coupling between the flange and its counter flange reached? (If applicable)Is the probe straight and geometry maintained?

Is the flexible conduit undamaged and not twisted?

Are the bolts completely inserted in the flange? (If applicable, make sure the flange is completely
attached to the nozzle.)



Does the compression fitting have all the sealing components?

Is the compression fitting properly tightened on the reinforcing sleeve?



Are the cable glands tightened on the extension cables? (If applicable)

Are the extension cables connected to the junction box terminals or transmitters? (If applicable)Endress+Hauser

iTHERM TMS21 MultiSens Slim

Wiring6

WiringLCAUTION
Failure to observe this may result in the destruction of parts of the electronics.
‣ Switch off the power supply before installing or connecting the device.
‣ When installing Ex-approved devices in a hazardous area please take special note of
the instructions and connection schematics in the respective Ex documentation added
to these Operating Instructions. The local Endress+Hauser representative is available
for assistance if required.
When wiring to a transmitter also observe the wiring instructions in the enclosed
Brief Operating Instructions for the relevant transmitter.
For wiring the device proceed as follows:
1.

Open the housing cover on the junction box.

2.

Open the cable glands on the sides of the junction box. →  11

3.

Feed the cables through the opening in the cable glands.

4.

Connect the cables as shown on →  15

5.

On completion of the wiring, screw the screw terminals tight. Tighten the cableglands again. In doing so, also pay particular attention to →  18. Close thehousing cover again.

6.

In order to avoid connection errors always take note of the hints given in the postconnection check! →  19

6.1

Quick wiring guide

Terminal assignment
NOTICE
Destruction or malfunction of parts of the electronics through electrostatic discharge.
‣ Take measures to protect the terminals from electrostatic discharge.
To avoid incorrect measured values, an extension or compensation cable must be used
for direct wiring of the thermocouple and the RTD sensors. The polarity indication on
the respective terminal block and the wiring scheme must be observed.
The manufacturer of the device is not responsible for the planning or installation of
the fieldbus connection cables. Therefore the manufacturer cannot be held liable forpossible harm due to the choice of materials that are not suitable for the applicationor due to faulty installation.

Endress+Hauser

15

Wiring

iTHERM TMS21 MultiSens Slim

2

3

1
7
6

7
6

1

+

5
5

1
+
2
-

4

2

3

4
A0033075

2
1
2
3
4

Wiring diagram of the double sensor input head transmitters (TMT8x)
Sensor input 1
Sensor input 2
Bus connection and supply voltage
Display connection

1
6

+
1+
5

+
-

4

-2-

3

3

2
A0045353

3
1
2
3

Wiring diagram of the single input head transmitters (TMT7x)
Sensor input
Bus connection and supply voltage
Display connection and CDI interface

Thermocouple cable colors
According to IEC 60584

According to ASTM E230

• Type E: Violet (+), white (-)• Type J: Black (+), white (-)• Type K: Green (+), white (-)• Type N: Pink (+), white (-)• Type E: Purple (+), red (-)• Type J: White (+), red (-)• Type K: Yellow (+), red (-)• Type N: Orange (+), red (-)

6.2

Connecting the sensor cables
Each sensor is marked with an individual TAG number. In the default configuration,
all wires are always already connected to the installed transmitters or terminals(when applicable).

The wiring is done in consecutive order. This means that the input channel(s) oftransmitter no. 1 are connected to the insert wires starting from insert no. 1. Transmitterno. 2 is not used until all channels of transmitter no. 1 are fully connected. The wires ofeach insert are marked with consecutive numbers starting from 1. If double sensors areused the internal marking has a suffix to distinguish the two sensors, e.g. 1A and 1B for
double sensors in the same insert or measuring point no. 1.

16

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Wiring

1B
1B

+
A
1
+
A
1

+
+
+
+
+
+
-

A0033288

4

Direct wiring on the mounted terminal block. Example for the internal sensor wires marking with 2 x TC
sensors in insert no. 1.

7
6
5

1

+
7

2

6

-

4

5

1

+
2
-

4

3

1A
1A
1B
1B

3

7

7

6
5

6

1

5

1

+

+

2
-

4

2
-

4

3

3

A0033289

5

Mounted and wired head transmitter. Example for the internal sensor wires marking with 2 x TC

Sensor typeTransmitter type

Wiring rule

1 x TC• Single input (one channel)• Double input (two channel)• 1 head transmitter per insert• 1 head transmitter for 2 inserts

2 x TC• Single input (one channel)• Double input (two channel)• Not available, wiring excluded• 1 head transmitter per insert

6.3

Connecting the power supply and signal cables

Cable specification• A shielded cable is recommended for fieldbus communication. Take the plant grounding
concept into consideration.
• The terminals for connecting the signal cable (1+ and 2-) are protected against reverse
polarity.
• Conductor cross-section:• Max 2.5 mm2 (14 AWG) for screw terminals• Max 1.5 mm2 (16 AWG) for spring terminals
Always observe the general procedure on →  15.

Endress+Hauser

17

Wiring

iTHERM TMS21 MultiSens Slim

2
4

5

5

4

6

6

3

3

7

7

3

2

+

1

-

2

+

1

-

1

4

A0033290

6
1
2
3
4

Connecting the signal cable and power supply to the installed transmitter
External ground terminal
Terminals for signal cable and power supply
Internal ground terminal
Shielded signal cable, recommended for fieldbus connection

6.4

Shielding and Grounding
For any specific electrical shielding and grounding of the transmitter wiring, pleaserefer to the appropriate Operating Instructions of the installed transmitter.
For shielding and grounding in hazardous applications, refer to the ATEX safety
instructions: XA01647T

Where applicable, national installation regulations and guidelines must be observed
during the installation! Where there are large potential differences between the individual
grounding points, only one point of the shielding is connected directly with the reference
ground. In systems without potential equalization, therefore, cable shielding of fieldbus
systems should only be grounded on one side, for example at the supply unit or at safetybarriers.
NOTICE
If the shielding of the cable is grounded at more than one point in systems without
potential matching, power supply frequency equalizing currents can occur thatdamage the signal cable or have a serious effect on signal transmission.
‣ In such cases the shielding of the signal cable is to be grounded on only one side, i.e. it
must not be connected to the ground terminal of the housing (terminal head, fieldhousing). The shield that is not connected should be insulated!

6.5

Ensuring the degree of protection

To comply with the degree of protection, the following points must be taken into account:→  7,  19
• The housing seals must be clean and undamaged before they are replaced in the sealing
rebate. If they are found to be too dry, they should be cleaned or even replaced.
• All housing screws and covers must be tightened.
• The cables and conduit used for connection must be of the correct specified outside
diameter (e.g. M20 x 1.5, cable diameter from 0.315 to 0.47 in; 8 to 12 mm).
• Tighten the cable gland.
• Lock adapter by means of the provided clip.
• Loop the cable or conduit before placing into the entry ("Water sack"). This means thatany moisture that may form cannot enter the gland. Install the measuring device so thatthe cable or conduit entries are not facing upwards.
• Entries not used are to be blanked off using the blanking plates provided.

18

Endress+Hauser

iTHERM TMS21 MultiSens SlimCommissioning

A001126076.6

Connection hints to maintain IP protection

Post-connection check

Is the device undamaged (internal equipment inspection)?

Electrical connection
Does the supply voltage match the specifications on the nameplate?



Are the mounted cables relieved of tension?

Are the power supply and signal cables correctly connected? →  15

Are all the screw terminals well tightened and have the connections of the spring terminals beenchecked?



Are all cable glands installed, securely tightened and leak-tight?



Are all housing covers installed and firmly tightened?

Does the marking of the terminals and cables match?

Is the electrical continuity of the thermocouple verified?



7

Commissioning

7.1

Preliminaries

Set-up guidelines of Standard, Extended and Advanced Commissioning for Endress+Hauser instruments in order to guarantee the function of the instrument according to:• Endress+Hauser operating manual• Customer set up specification, and/or• Application conditions, when applicable under process conditions
Both the operator and the person responsible for the process should be informed that acommissioning job will be carried out, observing the following actions:• If applicable, before disconnecting any sensor that is attached to the process, determine
what chemical or fluid is being measured (observe safety data sheet).
• Be aware of the temperature and pressure conditions.
• Never open a process fitting or loosen flange bolts before you have confirmed it is safe to
do so.
• Be sure not to disturb the process when disconnecting inputs/outputs or whensimulating signals.
• Ensure our tools, equipment and the customer process are protected from crosscontamination. Consider and plan necessary cleaning steps.
• When commissioning requires chemicals (e.g. as reagents for standard operation or for
cleaning purposes), always follow and observe the safety regulations.

Endress+Hauser

19Commissioning

iTHERM TMS21 MultiSens Slim

7.1.1

Reference documents• Endress+Hauser Standard Operating Procedure for Health and Safety (seedocumentation code: BP01039H)• Operating Manual of relevant tools and equipment to perform the commissioning job.
• Relevant Endress+Hauser Service Documentation (operating manual, work instructions,service info, service manual, etc.).
• Calibration certificates of the quality relevant equipment if available.
• If applicable, safety data sheet.
• Customer specific documents (safety instructions, setup points, etc.).

7.1.2

Tools and equipment

Multimeter and instrument related configuration tools as necessary from the above
mentioned action list.

7.2

Function check

Before commissioning the device make sure that all final checks have been carried out• "Post-mounting check” checklist →  14
• “Post-connection check” checklist →  19
The commissioning should be performed according to our commissioning segmentation(Standard, Extended and Advanced).

7.2.1

Standard commissioning

Visual inspection of device
1.

Check the instrument(s) for damage which may have been caused during transport/
shipping or mounting/wiring

2.

Check that the installation is done according to the operating manual

3.

Check that the wiring is done according to the operating manual and the local
regulations (e.g. grounding)4.

Check the dust/water tightness of the instrument(s)5.

Check safety precautions (e.g.. radiometric measurements)

6.

Power up the instrument(s)7.

Check the alarm list if applicable

Environmental conditions
1.

Check that the environmental conditions are appropriate for the instrument(s):Ambient temperature, humidity (ingress protection IPxx), vibrations, hazardous
areas (Ex, Dust-Ex), RFI/EMC, sun protection, etc.

2.

Check access to the instrument(s) for utilization and maintenanceConfiguration parameters‣ Configure the instrument(s) according to the Operating Manual with the parametersspecified by the customer or mentioned on the design specification

Output signal value check‣ Check and confirm that the local display and the output signals of the instrument(s)conform with the customer’s display

20

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Diagnostics and troubleshooting

7.2.2

Extended commissioning

In addition to the steps of Standard Commissioning, the following should be additionallycompleted:
Instrument Conformity
1.

Check the received instrument(s) with the purchase order or design specification
including accessories, documentation and certificates2.

Check Software Version (e.g. application software such as “Batching”) when provided

3.

Check that the documentation has the correct issue and version

Functional test
1.

Test of the instrument outputs, including switching points, auxiliary inputs/outputs
with the internal or an external simulator (e.g. FieldCheck)2.

Compare the measuring data/results with a reference from the customer. (e.g.
laboratory result in case of an analyzer, weight scale in the case of a batching
application, etc.)

3.

Adjust the instrument(s) if necessary and as described in the operating manual

7.2.3

Advanced commissioning

The Advanced Commissioning provides a loop test in addition to the steps covered in theStandard and Extended Commissioning.
Loop test
1.

Simulate a minimum of 3 output signals from the instrument(s) to the control room

2.

Read out/note the simulated and indicated values and check for linearity

7.3

Switching on the device

Once the final checks have been successfully completed, it is time to switch on the supply
voltage. Afterwards the multipoint thermometer is operational. If there are Endress+Hauser temperature transmitter in use, please refer to the enclosed Brief Operating
Instructions for commissioning.

8

Diagnostics and troubleshooting

8.1

General troubleshooting

NOTICE
Repair of parts of the device‣ In the event of a serious fault, a measuring device might have to be replaced. In thecase of replacement see section 'Return' →  22.
‣ It is always important to check the connection between the cables and terminals, inorder to guarantee the proper strain relief to the cables, and the tightening and thesealing of the screw terminals.
Before commissioning the measuring system make sure that all final checks have been
carried out:
• Follow the checklist in section 'Post-mounting check' →  14
• Follow the checklist in section 'Post-connection check' →  19

Endress+Hauser

21

Repair

iTHERM TMS21 MultiSens Slim

If transmitters are used, please refer to the documentation of the transmitter installed for
diagnostic and troubleshooting procedures .

9

Repair9.1

General information

Accessibility around the device for maintenance must be guaranteed. Each component thatis part of the device must – in the case of replacement – be replaced by an originalEndress+Hauser spare part that guarantees the same characteristics and performance. To
ensure continued operational safety and reliability, repairs should only be carried out on
the device if they are expressly permitted by Endress+Hauser, in compliance with federal/national regulations pertaining to repair of an electrical device.

9.2

Spare parts

Product spare parts that are currently available can be found online at:
http://www.products.endress.com/spareparts_consumables.:When ordering spare parts, please specify the serial number of the unit!
Spare parts of the multipoint thermometer assembly are:• Conduit and adapters• Cable glands, transmitters or electrical terminals, if provided• Other accessories when applied and replaceable

9.3

Endress+Hauser services

Service

Description

Certifications

Endress+Hauser is able to fulfill requirements belonging to the design, productmanufacturing, tests and commissioning according to specific approvals byhandling or suppling individual certified components and by checking the
integration on the whole system.

Maintenance

All Endress+Hauser systems are designed for easy maintenance thanks to amodular design that permits the replacement of old or worn parts. Standardized
parts ensure fast maintenance.

Calibration

Endress+Hauser’s range of calibration services covers on-site verification tests,
accredited laboratory calibrations, certificates and traceability to ensurecompliance.

9.4

ReturnThe requirements for safe device return can vary depending on the device type andnational legislation.

22

1.

Refer to the web page for information:
https://www.endress.com/support/return-material
 Select the region.

2.

If returning the device, pack the device in such a way that it is reliably protectedagainst impact and external influences. The original packaging offers the bestprotection.

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Accessories

9.5

Disposal

If required by the Directive 2012/19/EU on waste electrical and electronic equipment(WEEE), the product is marked with the depicted symbol in order to minimize thedisposal of WEEE as unsorted municipal waste. Do not dispose of products bearing thismarking as unsorted municipal waste. Instead, return them to the manufacturer for
disposal under the applicable conditions.

9.5.1

Removing the measuring device

1.

Switch off the device.

2.

LWARNING
Danger to persons from process conditions.
‣ Beware of hazardous process conditions such as pressure in the measuring device,high temperatures or aggressive fluids.
Carry out the mounting and connection steps from the chapters "Mounting theassembly" and "Wiring" in the logically reverse sequence (when applicable). Observe
the safety instructions.

9.5.2

Disposing of the measuring device

Observe the following notes during disposal:‣ Observe valid federal/national regulations.
‣ Ensure proper separation and reuse of the device components.

10

Accessories

The accessories currently available for the product can be selected at www.endress.com:
1.

Select the product using the filters and search field.

2.

Open the product page.

3.

Select Spare parts & Accessories.

10.1

Device-specific accessories

Accessories

Description

Junction box

The junction box is suited for chemical agents
environments. Sea water corrosion resistance andextreme temperature variation stability is guaranteed.
Ex-e, Ex-i terminals can be generally installed.

Transmitter

Head transmitter• PC programmable head transmitter• With HART®-, PROFIBUS® PA or FOUNDATION
FieldbusTM communication protocol
8-channel DIN rail transmitter with FOUNDATION
FieldbusTM communication protocol

Endress+Hauser

23

Accessories

iTHERM TMS21 MultiSens Slim

Accessories

Description

Pads, clips, spacers• Pads and clips: in order to fix the multipoint
thermometer along its immersion length.
• Spacer: Used in presence of an existing thermowell inorder to guarantee the centering.

Specific extension for on-board junction box

When the junction box cannot be remotely installed, it
has to be configured on-board at the multipoint
thermometer. Therefore, a specific extension design has
to be provided. This design is available on request only
for flanged process connection.

C
A

B

A0030866

8Junction box as accessory for remote installation

Possible junction box dimensions (A x B x C) in mm (in):Stainless Steel

Aluminum

24

A

B

C

Min.

150 (5.9)

150 (5.9)

100 (3.9)

Max.

500 (19.7)

500 (19.7)

160 (6.3)

Min.

305 (12)280 (11)238 (9.4)

Max.

600 (23.6)

600 (23.6)

365 (14.4)

Type of specification

Junction box

Cable glands

Material

AISI 316 / aluminum

NiCr Plated brass
AISI 316 / 316L

Ingress protection (IP)IP66/67

IP66

Ambient temperature range–50 to +60 °C(–58 to +140 °F)–52 to +110 °C (–61.1 to +140 °F)

Approvals

IECEx, ATEX, UL, CSA, NEPSI/ CCC, EAC Ex approval for use
in hazardous area approval

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Accessories

Type of specification

Junction box

Identification

ATEX II 2GD Ex e IIC
T6/T5/T4 Gb/Ex ia IIC
T6/T5/T4 Ga Ex tb IIIC T85°C/
T100°C/T135°C Db IP66
UL913 Class I, Zone 1, AEx e
IIC; Zone 21, AEx tb IIIC IP66
CSA C22.2 No.157 Class I,
Zone 1 Ex e IIC; Class II,
Groups E, F and G
IECEx Ex e IIC T6/T5/T4
Gb/Ex ia IIC T6/T5/T4 Ga Ex
tb IIIC T85°C/T100°C/T135°C
Db IP66
EAC 1 Ex e IIC T6/T5/T4 Gb
X/1 Ex ia IIC T6/T5/T4 Gb X/
Ex tb IIIC T85°C/T100°C/
T135°C Db IP66

Cover

Hinged-Maximum sealing diameter-

6 to 12 mm (0.24 to 0.47 in)

10.2

Cable glands

Communication-specific accessories

Configuration kit TXU10

Configuration kit for PC-programmable transmitter with setup software andinterface cable for PC with USB port
Order code: TXU10-xx

Commubox FXA195
HART

For intrinsically safe HART communication with FieldCare via the USB port.

Commubox FXA291

 For details, see "Technical Information" TI00404F
Connects Endress+Hauser field devices with a CDI interface (= Endress+Hauser
Common Data Interface) and the USB port of a computer or laptop.

 For details, see "Technical Information" TI00405C
Field Xpert SMT70

The tablet PC for device configuration enables mobile plant asset management inhazardous and non-hazardous areas. It is suitable for commissioning andmaintenance.

 For details, see "Technical Information" TI01342S
Wireless HART adapter
SWA70

Is used for the wireless connection of field devices.
The WirelessHART adapter can be easily integrated into field devices and existing
infrastructures, offers data protection and transmission safety and can be operated
in parallel with other wireless networks with minimum cabling complexity.

 For details, see Operating Instructions BA061S
10.3

Service-specific accessories

Accessories

Description

Applicator

Software for selecting and sizing Endress+Hauser measuring devices:• Calculation of all the necessary data for identifying the optimum measuring
device: e.g. pressure loss, accuracy or process connections.
• Graphic illustration of the calculation results
Administration, documentation and access to all project-related data andparameters over the entire life cycle of a project.
Applicator is available:
Via the Internet: https://portal.endress.com/webapp/applicatorEndress+Hauser

25Technical data

iTHERM TMS21 MultiSens Slim

FieldCare SFE500

FDT-based plant asset management tool from Endress+Hauser.
It can configure all smart field units in your system and helps you manage them. By
using the status information, it is also a simple but effective way of checking theirstatus and condition.

 For details, see Operating Instructions BA00027S and BA00065S
DeviceCare SFE100

Configuration tool for devices via fieldbus protocols and Endress+Hauser service
protocols.
DeviceCare is the tool developed by Endress+Hauser for the configuration ofEndress+Hauser devices. All smart devices in a plant can be configured via a pointto-point or point-to-bus connection. The user-friendly menus enable transparent
and intuitive access to the field devices.

 For details, see Operating Instructions BA00027S

Measured variable

11

Technical data

11.1

Input

Temperature (temperature linear transmission behavior)

11.2

OutputOutput signal

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 thejunction box and wired with the sensory mechanism.

Family of temperaturetransmitters

Thermometers fitted with iTEMP transmitters are an installation-ready complete solution
to improve temperature measurement by significantly increasing measurement accuracy
and reliability, when compared to direct wired sensors, as well as reducing both wiring andmaintenance 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 theEndress+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 andthermocouples, 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) according to DIN EN
50446. Quick and easy operation, visualization and maintenance using universal
configuration software like FieldCare, DeviceCare or FieldCommunicator 375/475. For
more information, see the Technical Information.
PROFIBUS PA head transmitter
Universally programmable head transmitter with PROFIBUS PA communication.
Conversion of various input signals into digital output signals. High measurement accuracy
over the complete ambient temperature range. PROFIBUS PA functions and device-specific26

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Technical data

parameters are configured via fieldbus communication. For more information, see theTechnical Information.
FOUNDATION Fieldbus head transmitter
Universally programmable head transmitter with FOUNDATION Fieldbus communication.
Conversion of various input signals into digital output signals. High measurement accuracy
over the complete ambient temperature range. All transmitters are approved for use in all
the main 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:• Double 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-channel transmitters, based on Callendar/Van
Dusen coefficients

11.3

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 thejunction box.
Wiring diagrams

2 x TC

1 x TC
-

+

-

-

+

+
A0012700

9

Mounted terminal block

Wiring diagrams for TC connection

Endress+Hauser

27Technical data

iTHERM TMS21 MultiSens Slim

2

3

1
7
6

7
6

1

+

5
5

1
+
2
-

4

2

3

4
A0033075

 10
1
2
3
4

Wiring diagram of the double sensor input head transmitters (TMT8x)

Sensor input 1
Sensor input 2
Bus connection and supply voltage
Display connection

1
6

+
1+
5

+
-

4

-2-

3

3

2
A0045353

 11
1
2
3

Sensor input
Bus connection and supply voltage
Display connection and CDI interface

11.4
Accuracy

Wiring diagram of the single input head transmitters (TMT7x)

Performance characteristics

Permissible deviation limits of thermoelectric voltages from standard characteristic forthermocouples as per IEC 60584 and ASTM E230/ANSI MC96.1:

Standard

Model

ASTM E230/
MC.96.1

Deviation; the larger value applies in each case28

Standard tolerance

Special tolerance (on request)

K (NiCr-Ni)±2.2 K (±3.96 °F) or ±0.02 · |t| (–200 to 0 °C (–328 to 32 °F)±2.2 K (±3.96 °F) or ±0.0075 · |t|(0 to 1 260 °C (32 to 2 300 °F)±1.1 K (±1.98 °F) or ±0.004 · |t|(0 to 1 260 °C (32 to 2 300 °F)

J (Fe-CuNi)±2.2 K (±3.96 °F) or ±0.0075 · |t| (0 to 760 °C (32 to 1 400 °F)±1.1 K (±1.98 °F) or ±0.004 · |t|(0 to 760 °C (32 to 1 400 °F)

N (NiCrSiNiSi)±2.2 K (±3.96 °F) or ±0.02 · |t| (–200 to 0 °C (–328 to 32 °F)±2.2 K (±3.96 °F) or ±0.0075 · |t|(0 to 1 260 °C (32 to 2 300 °F)±1.1 K (±1.98 °F) or ±0.004 · |t|(0 to 1 260 °C (32 to 2 300 °F)

E (NiCr-CuNi)±1.7 K (±3.06 °F) or ±0.01 · |t| (–200 to 0 °C (–328 to 32 °F)±1.7 K (±3.06 °F) or ±0.005 · |t| (0 to 870 °C (32 to 1 598 °F)±1 K (±1.8 °F) or ±0.004 · |t|(0 to 870 °C (32 to 1 598 °F)

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Technical data

The materials for thermocouples are generally supplied such that they meet the tolerances
for temperatures > 0 °C (32 °F) as specified in the table. These materials are not usuallysuitable for temperatures < 0 °C (32 °F). The specified tolerances cannot be observed. For
this temperature range, a separate material selection is required. This cannot be processedusing the standard product.
Standard

Model

IEC60584

Standard tolerance

Special tolerance (on request)

Class

Deviation

Class

Deviation

K (NiCr-Ni)

2±2.5 °C (±4.5 °F) (–40 to 333 °C (–40 to 631.4 °F)±0.0075 · |t| (333 to 1 200 °C (631.4 to 2 192 °F)

1±1.5 °C (±2.7 °F) (–40 to 375 °C (–40 to 707 °F))
±0.004 · |t| (375 to 1 000 °C (707 to 1 832 °F)

J (Fe-CuNi)

2±2.5 °C (±4.5 °F) (–40 to 333 °C (–40 to 631.4 °F)±0.0075 · |t| (333 to 750 °C (631.4 to 1 382 °F)

1±1.5 °C (±2.7 °F) (–40 to 375 °C (–40 to 707 °F))
±0.004 · |t| (375 to 750 °C (707 to 1 382 °F)

N (NiCrSiNiSi)

2±2.5 °C (±4.5 °F) (–40 to 333 °C (–40 to 631.4 °F)±0.0075 · |t| (333 to 1 200 °C (631.4 to 2 192 °F)

1±1.5 °C (±2.7 °F) (–40 to 375 °C (–40 to 707 °F))
±0.004 · |t| (375 to 1 000 °C (707 to 1 832 °F)

E (NiCr-CuNi)

2±2.5 °C (±4.5 °F) (–40 to 333 °C (–40 to 631.4 °F)±0.0075 · |t| (333 to 900 °C (631.4 to 1 652 °F)

1±1.5 °C (±2.7 °F) (–40 to 375 °C (–40 to 707 °F))
±0.004 · |t| (375 to 800 °C (707 to 1 472 °F)

Thermocouples made of non-precious metals are generally supplied such that they meetthe manufacturing tolerances for temperatures > –40 °C (–40 °F) as specified in the table.
These materials are not usually suitable for temperatures < –40 °C (–40 °F). The tolerances
for Class 3 cannot be observed. For this temperature range, a separate material selection isrequired. This cannot be processed using the standard product.
Response time

Response time for the sensor assembly without transmitter.
Test architecture
Multimeter Keithley 2000
Fluid bath for response time tests
Test description
Tests in water at 0.4 m/s (1.3 ft/s), according to IEC 60751 and ASTM E644; 10 K
temperature step change.
At the beginning the thermometer to be tested is stabilized in its raised position, outside
the fluid at ambient temperature, then it is immersed rapidly in the fluid bath.
Measurement of the output values of the thermometer begins at the latest at the momentin which the thermometer is immersed in the bath. Recording continues until thethermometer has reached the temperature of the medium.

Additional tests (onrequest)Endress+Hauser

Tested thermowell diameter and length

Average response time at a temperature of
177 °C (350.6 °F)177 °C

6 mm (0.24 in), 4 520 mm (177.95 in)

t50

3s

t63

4.1 s

t90

9s

• Functional test measurement at a fixed temperature over the entire thermowell: themultipoint product under test is simultaneously checked by comparing its individual
sensors with a multipoint reference device having an already known behavior andaccuracy. This test has not to be seen as a calibration test.
• Thermal excitation: this test allows the evaluation of the response time of eachmeasuring point when a local thermal excitation is applied. Additionally it shows theeffects of the local excitation on the closest points due to the thermal equalization effectof the thermowell sheath.

29Technical data

Calibration

iTHERM TMS21 MultiSens SlimCalibration is a service that can be performed in house, either on single sensors before
assembling or on the complete device before dispatching.
Calibration involves comparing the measured values of the measuring elements of themultipoint 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.
Two different methods are used for the inserts:• Calibration at fixed points, e.g. at the freezing point of water at 0 °C (32 °F).
• Calibration compared against a precise reference thermometer.
Evaluation of inserts
If a calibration with an acceptable measurement uncertainty and transferable
measurement results is not possible, Endress+Hauser offers an insert evaluation
measurement service, if technically feasible.

11.5

Mounting procedure

Installation point

The installation location must meet the requirements listed in this document – such as
ambient temperature, ingress protection, climate class, etc. Care should be taken whenchecking the sizes of possible existing support frames or brackets welded on the reactor’swall (usually not included in the scope of delivery) or of any other existing frame in the
installation area.

Orientation

It is recommended to install the multipoint thermometer in vertical configuration. Whenvertical installation is not possible, care has to be taken in order to ensure that thereinforcing sleeve is not under bending loads due to the any conduit cable tension.
When the flexible configuration is ordered, even offset routings, which do not correspondto the alignment of the longitudinal axis of the multipoint thermometer, are allowed
thanks to the flexible part of the thermowell.

30

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Technical data

2

1

A0033848

 12
1
2

Installation instructions

Main configuration possibilities

Vertical installation with rigid configuration
Installation with flexible configuration

The multipoint thermometer is designed to be installed by means of a compression fitting,when necessary with a flange mounted on a vessel, reactor, tank or similar environment.
The thermometer has been developed to ensure utmost flexibility in terms of possible
routing through any encumbrance and constraint that can be met in any plant. It
guarantees a high sealing level, noiseless signals, and high mechanical protection of theextension cables.
All parts and components have to be handled with care. During the installation phase,lifting and introduction of the equipment through the preset nozzle, the following must be
avoided:• Misalignment with the nozzle axis.
• Any load on the welded or threaded parts due to the action of the weight of the device.
• Overtightening of the compression fittings.
• Any tensile and torsional load on the conduit cable.
• Any bending load on the conduit cable.
• Fixing the extension conduit on the plant's infrastructures without allowing axial
displacements or movements.
• Deformation or crushing of the threaded components, bolts, nuts, cable glands andcompression fittings.
• Bending radius of the flexible part of the thermowell smaller than 20 times the diameterof the flexible hose.

Endress+Hauser

31Technical data

iTHERM TMS21 MultiSens Slim

• Tension loads on the flexible part.
• Friction between the flexible part and the internals of the reactor.
• Fixing the flexible part on the reactor's infrastructures without allowing axial
displacements or movements.

11.6
Ambient temperature
range

Storage temperature

Environment

Configuration without junction box: –40 to +95 °C (–40 to +203 °F)
Configuration with junction box, ordered as accessory:
Junction box

Non-hazardous area

Hazardous area

Without mounted
transmitter–40 to +85 °C (–40 to +185 °F) –40 to +60 °C (–40 to +140 °F)

With mounted headtransmitter–40 to +85 °C (–40 to +185 °F) Depends on the respective hazardous area
approval. Details see Ex documentation.

Configuration without junction box: –40 to +95 °C (–40 to +203 °F)
Configuration with junction box, ordered as accessory:
Junction box

Humidity

With head transmitter–40 to +95 °C (–40 to +203 °F)

With DIN rail transmitter–40 to +95 °C (–40 to +203 °F)

Condensation according to IEC 60068-2-14:• Head transmitter: Permitted• DIN rail transmitter: Not permitted
Maximum relative humidity: 95% according to IEC 60068-2-30

Degree of protection• Extension conduit: IP68
• Junction box: IP66/67

Electromagnetic
compatibility (EMC)

Depending on the transmitter used. For detailed information see the related Technical
Information, listed at the end of this document.

11.7
Design, dimensions

Mechanical construction

The overall multipoint assembly is composed of standardized parts with different features
allowing a wide range of product configurations. Different inserts, in terms of TC types,
standards, materials, lengths and thermowells are available. They can be selected based
upon specific process conditions, in order to have the highest application match and themost extended lifetime. Associated extension cables are provided with high resistancesheath materials and shielded for steady and noiseless signals, protected by a polymeric
conduit to withstand different environmental conditions (salt, sand, humidity, etc.). The
transition between the probe and the conduit is obtained by the usage of a main bushing,containing the electrical junctions between the TC sensors and the extension cables. It iscompletely sealed to ensure the declared degree of protection IP68.
It also works as the transition part between the reinforcing sleeve and the conduit cable forsignal communication. The reinforcing sleeve is the dedicated probe’s zone to adjust the32

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Technical data

immersion length through sliding compression fittings or flanges. For the flexible
configuration the reinforcing sleeve has integrated the flexible thermowell that allows
non-linear routings into the process. If there is a misalignment between the installation
connection and the direction of the measurement given by the rigid part of thethermowell, the flex configuration is the proper solution.
A

M

C

B

TD

FL

RD

LMP1

LMPn
L

A

C/2

H

C

B

M

OD

FD

RD

TD

FL

LMP1

LMPn

L
A0033087

 13

Rigid and flexible design of the modular multipoint thermometer. All dimensions in mm (in)A
Conduit cable length
B
Main bushing length 190 mm (7.50 in)CReinforcing sleeve length, 200 mm (7.87 in)
FD Flexible part diameter
FL Flying leads lengthH
Flexible part length
LMPx Immersion length of sensing elements
L
Device length
M Thermowell length
RD Reinforcement diameter
TD Thermowell diameter
OD Outer diameter

Conduit cable length A and flying leads length FL
A: Maximum 5 000 mm (197 in), minimum 1 000 mm (39.4 in)
FL: 500 mm (19.7 in) as standard
Specifically customized lengths are available on request.

Reinforcing sleeve length C
200 mm (7.87 in)Specifically customized lengths are available on request.

Flexible part diameter FD
9.8 mm (0.39 in), 16.2 mm (0.64 in)Outer diameter OD
14 mm (0.55 in), 21 mm (0.83 in)

Flexible hose length H
Max. 4 000 mm (157 in)Specifically customized lengths are available on request.

Endress+Hauser

33

Technical data

iTHERM TMS21 MultiSens Slim

Immersion lengths MPx of measuring elements
Max. 13 m (512 in)Specifically customized lengths are available on request.

Maximum circuits total length
For Ex-version, rigid design
FL+L ≤ 50 m (164 ft)
Specifically customized lengths are available on request.

Compression fitting pressure rating at ambient temperature
NPT/ISO Size

bar

psi

1/4"

550

8000

1/2"

530

7700

3/4"

500

7300

1"

370

5300

Thermowell diameter
Different insert types are available. For any different requirement that is notdescribed here, please contact the Endress+Hauser sales department.
Thermowell
Diameter

Available for
Ex-version• 3.2 mm (0.13 in)• 6 mm (0.24 in)• 6.35 mm (0.25 in)• 8 mm (0.31 in)• 9.5 mm (0.37 in)

Rigid

Flexible

Ex ia

SensorSheathmaterial

Thermocoupl Standard
e type316, 316L
Inconel600
316Ti
321
347

1x type K
1x type J
1x type N
1x type E
2x type K
2x type J
2x type N
2x type E

Measuringpoint
execution

IEC 60584
ASTM E230

Grounded
Ungrounded

Main bushing

316 + 316L

Reinforced sleeve + thermowell316 + 316L, 347, 321,
Inconel600, 316Ti

Main bushing

316 + 316L

Reinforced sleeve

316 + 316L, 347, 321,
Inconel600, 316Ti

Thermowell316 + 316L, 347, 321,
Inconel600, 316Ti

Flexible part

Inconel600, 347 (specification on request)
321, 316 + 316L (standard)

For improved reliability, Endress+Hauser can offer duplicate measuring point sensors,in order to achieve a sensor backup. This is achieved either through duplicate
thermocouples or through the coupling of two independent sensors (same length).
Improved monitoring can be achieved in combination with double channeltransmitters TMT8x.

34

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Technical data

Maximum number of inserts for every combination of thermowell and insert diameter 1)
Thermowell OD in mm (in)3.2 (0.13)
Insert diameter in mm (in)1)
2)

6 (0.24)

6.35 (0.25)

8 (0.31)2)

9.5 (0.37)
59 2)

0.5 (0.02)

8

28

22

46

0.8 (0.03)

3

15

12

24

30

1 (0.04)

2

10

8

18

22

1.5 (0.06)

-

6

4

8

12

For Ex-version, the maximum number of sensors is limited to 20.
For this configuration the main bushing has to be specially engineered

Weight

The weight can vary depending on the configuration: extension and thermowell length,
type and dimensions of process connection as well as the number of inserts.

Materials of insert sheath,thermowell, main bushing
and all wetted parts

The temperatures for continuous operation specified in the following table are only
intended as reference values for use of the various materials in air and without any
significant compressive load. The maximum operation temperatures are reduced
considerably in some cases where abnormal conditions such as high mechanical load occur
or in aggressive media.

Endress+Hauser

Material
nameShort form

Recommended
max.
temperature forcontinuous use
in air

Properties

AISI
316/1.4401

X5CrNiMo 17-12-2

650 °C (1 202 °F)• Austenitic, stainless steel• High corrosion resistance in general• Particularly high corrosion resistance in chlorinebased and acidic, non-oxidizing atmospheres
through the addition of molybdenum (e.g.
phosphoric and sulfuric acids, acetic and tartaric
acids with a low concentration)

AISI 316L/
1.44041.4435

X2CrNiMo17-12-2
X2CrNiMo18-14-3

650 °C (1 202 °F)• Austenitic, stainless steel• High corrosion resistance in general• Particularly high corrosion resistance in chlorinebased and acidic, non-oxidizing atmospheres
through the addition of molybdenum (e.g.
phosphoric and sulfuric acids, acetic and tartaric
acids with a low concentration)• Increased resistance to intergranular corrosion
and pitting• Compared to 1.4404, 1.4435 has even higher
corrosion resistance and a lower delta ferrite
content

Alloy600/
2.4816NiCr15Fe

1 100 °C
(2 012 °F)• A nickel/chromium alloy with very good
resistance to aggressive, oxidizing and reducing
atmospheres, even at high temperatures• Resistance to corrosion caused by chlorine gases
and chlorinated media as well as many oxidizing
mineral and organic acids, sea water etc.
• Corrosion from ultrapure water• Not to be used in sulfur-containing atmospheres

AISI
304/1.4301

X5CrNi18-10

850 °C (1 562 °F)• Austenitic, stainless steel• Can be used well in water and wastewater withlow level of pollution• Only at relatively low temperatures resistant toorganic acids, saline solutions, sulphates, alkaline
solutions, etc.

35

Technical data

Process connection

iTHERM TMS21 MultiSens Slim

Material
nameShort form

Recommended
max.
temperature forcontinuous use
in air

PropertiesAISI 304L/
1.4307

X2CrNi18-9

850 °C (1 562 °F)• Good welding properties• Impervious to intergranular corrosion• High ductility, excellent drawing, forming, andspinning propertiesAISI 316Ti/
1.4571X6CrNiMoTi17-12-2 700 °C (1 292 °F)• Addition of titanium means increased resistanceto intergranular corrosion even after welding• Broad range of uses in the chemical,
petrochemical and oil industries as well as in coalchemistry• Can only be polished to a limited extent, titanium
streaks can form

AISI
321/1.4541

X6CrNiTi18-10

815 °C (1 499 °F)• Austenitic, stainless steel• High resistance to intergranular corrosion evenafter welding• Good welding characteristics, suitable to allstandard welding methods• It is used in many sectors of the chemicalindustry, petrochemical, and pressurized vessels

AISI
347/1.4550

X6CrNiNb10-10

800 °C (1 472 °F)• Austenitic, stainless steel• Good resistance to a wide variety ofenvironments in the chemical, textile, oilrefining, dairy and food industries• Added niobium makes this steel impervious tointergranular corrosion• Good weldability• Main applications are furnace fire walls, pressure
vessels, welded structures, turbine blades

FlangeExamples of most common flanges according to the following standards: ASME, EN
Standard 1) Size

RatingMaterial 2)

ASME½", 1”, 1½”, 2”, 3”, 4”

150#, 300#AISI 316 + 316L, 316Ti, 321, 347

EN

DN15, DN25, DN32, DN40, DN50, DN80, PN10,PN16, PN40
DN100

1)
2)

Other flange standards are available on request. Please refer to our technicians for support.
Plated flanges with special alloys (i.e. Alloy 600) are available

Compression fittings
The compression fittings are used directly as the process connection or welded or threaded
into the flange to ensure proper process tightness and performances. Dimensions arecoherent with the reinforcing sleeve dimensions.

11.8

Operation

For details of operability, see the Technical Information of the Endress+Hauser
temperature transmitters or the manuals of the related operating software.

36

Endress+Hauser

iTHERM TMS21 MultiSens Slim

Technical data

11.9

Certificates and approvals

Current certificates and approvals for the product are available at www.endress.com on therelevant product page:1.

Select the product using the filters and search field.

2.

Open the product page.

3.

Select Downloads.

11.10 Documentation
For an overview of the scope of the associated Technical Documentation, refer to thefollowing:• Device Viewer (www.endress.com/deviceviewer): Enter the serial number from thenameplate• Endress+Hauser Operations app: Enter serial number from nameplate or scanmatrix code on nameplate.
Document function

The following documentation may be available depending on the version ordered:
Document type

Purpose and content of the document

Technical Information (TI)

Planning aid for your device
The document contains all the technical data on the device and provides
an overview of the accessories and other products that can be ordered forthe device.

Brief Operating Instructions (KA)

Guide that takes you quickly to the 1st measured value
The Brief Operating Instructions contain all the essential informationfrom incoming acceptance to initial commissioning.

Operating Instructions (BA)Your reference document
The Operating Instructions contain all the information that is required in
the various phases of the life cycle of the device: from productidentification, incoming acceptance and storage, to mounting,connection, operation and commissioning through to troubleshooting,
maintenance and disposal.

Description of Device Parameters(GP)

Reference for your parameters
The document provides a detailed explanation of each individual
parameter. The description is aimed at those who work with the device
over the entire life cycle and perform specific configurations.

Safety Instructions (XA)

Depending on the approval, safety instructions for electrical equipment inhazardous areas are also supplied with the device. The Safety Instructions
are an integral part of the Operating Instructions.
Information on the Safety Instructions (XA) relevant to the device is provided
on the nameplate.

Supplementary device-dependent
documentation (SD/FY)

Endress+Hauser

Always comply strictly with the instructions in the relevant
supplementary documentation. The supplementary documentation is an
integral part of the device documentation.

37

*71637643*
71637643

www.addresses.endress.com