Endress+Hauser TMS12 Specifications
TI01399T/09/EN/02.19
71456860
2019-10-21
Products
Solutions Services
Technical Information
iTHERM TMS12
MultiSens Linear
Modular TC and RTD multipoint with primary
thermowell (with diagnostic chamber)
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
• Easy integration due to IEC 60584, ASTM E230 and IEC 60751 inserts
• Electrical and Pressure Directive compliance for an easy process integration
• 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
• Advanced diagnosis to monitor the performances of the complete thermometric
®
wide and easy process integration
sensors protection
device during its operating time and to plan in advanced any maintenance action
Table of contents
iTHERM TMS12 MultiSens Linear
Function and system design ................... 3
Measuring principle ............................ 3
Measuring system ............................. 3
Equipment architecture ......................... 4
Input ..................................... 7
Measured variable ............................. 7
Measuring range .............................. 7
Output ................................... 7
Output signal ................................ 7
Family of temperature transmitters ................. 7
Power supply .............................. 8
Wiring diagrams .............................. 8
Performance characteristics ................... 9
Accuracy ................................... 9
Response time .............................. 10
Shock and vibration resistance .................... 10
Calibration ................................. 10
Installation ............................... 11
Mounting location ............................ 11
Orientation ................................ 11
Installation instructions ........................ 11
Other standards and guidelines ................... 25
Material certification .......................... 25
Test report and calibration ...................... 25
Ordering information ....................... 26
Accessories ............................... 29
Device-specific accessories ...................... 29
Communication-specific accessories ................ 30
Service-specific accessories ...................... 30
Documentation ............................ 31
Environment .............................. 13
Ambient temperature range ..................... 13
Storage temperature .......................... 13
Humidity .................................. 13
Climate class ............................... 13
Electromagnetic compatibility (EMC) ............... 13
Process .................................. 13
Process temperature range ...................... 13
Process pressure range ......................... 14
Mechanical construction .................... 14
Design, dimensions ........................... 14
Weight ................................... 20
Materials .................................. 21
Process connection ........................... 22
Compression fittings .......................... 22
Thermal contacts components .................... 23
Operability ............................... 24
Certificates and approvals ................... 25
CE Mark .................................. 25
Hazardous area approvals ....................... 25
PED approval ............................... 25
Certification HART ........................... 25
Certification FOUNDATION Fieldbus ................ 25
Certification PROFIBUS® PA ..................... 25
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iTHERM TMS12 MultiSens Linear
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).
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 TMS12 MultiSens Linear
1 2
3 4
6
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
5
Equipment architecture
A0036464
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 → 31
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 is 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 System: It is designed to support the junction box by swivelling joint.
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iTHERM TMS12 MultiSens Linear
1a
2
4
6b
11
7
8
9
3
12
6b
5
1b
2
4
6a
10b
7
10a
9
3
8
11
12
6a
5
• Additional Accessories: They can be ordered for any configuration, and they are recommended in
• Primary Thermowell: It is directly welded to the process connection, designed to guarantee high
• Diagnostic Chamber: This subassembly consists in a closed volume that ensures the continuous
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).
case of replaceable sensors configuration (such as pressure transducers, manifolds, valves and
fitting).
degree of mechanical protection and corrosion resistance.
monitoring of the device conditions during its operating life and safe leakage containment. The
chamber has integrated connections for accessories (such as valves, manifolds). A wide range of
accessories is available to get the highest level of system information (pressure, temperature,
fluids composition and next maintenance step).
Design
A0036465
A0036466
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iTHERM TMS12 MultiSens Linear
Description, available options and materials
1: Head
1a: Directly mounted
1b: Remote
2: Support System Swivelling support joint for junction box orientation.
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 sensor thermal contacts
6a: for protecting thermowells
6b: for 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
9: Pressure port (threaded hole) Auxiliary connections and fittings for pressure detection.
10: Protections
10a: Cable conduit system (in case of
remote head)
10b: Extension cables cover
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
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.
• 316/316L
• 321
• 304/304L
• 310L
Represented by a flange according to international standards, or
engineered to satisfy specific process requirements → 14.
• 316 + 316L
• 304
• 310
• 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 are not replaceable.
• bent tip.
SS 316
box.
• Shielded PVC
• Shielded Hyflon MFA
• Unshielded PVC flying leads
Cable conduit: made by flexible polyamide to connect the top of the
diagnostic chamber and the remote 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.
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iTHERM TMS12 MultiSens Linear
Description, available options and materials
11: Compression fitting High performing fittings for the tightness between the diagnostic
12: Diagnostic chamber
12a: Basic Chamber
12b: Advanced Chamber
Input
chamber-head and the external environment, suitable for a wide
range of process fluids and severe combination between temperature
and pressure.
Diagnostic chamber for leakage detection and safe containment.
System behavior monitoring thanks to a continuous pressure
detection of the contained fluids.
Basic configuration: not replaceable inserts. Extension cables
replaceable in case of accidental damages (through the replacement
of the external insert stump).
Advanced configuration: complete inserts replacement allowed.
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
terminal head (flat face) as per DIN EN 50446. Swift and easy operation, visualization and
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iTHERM TMS12 MultiSens Linear
3
5
6
RTD
3
4
5
6
RTD
1
2
TC
6
4
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)
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 TMS12 MultiSens Linear
-
+
+
1
-
2
7
6
5
4
3
1
2
7
6
5
4
3
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
TC
TC
A
AA
-200 -100 0 100 200 300 400 500 600°C
0.5
1.0
1.5
2.0
B
2.5
3.0
- 0.5
- 1.0
- 1.5
- 2.0
- 2.5
- 3.0
B
A
AA
Max. deviation (°C)
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)
)
1)
)
1)
)
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 TMS12 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
J (Fe-CuNi) 2 ±2.5 °C (–40 to 333 °C)
±0.0075 |t|
K (NiCr-NiAl)
N (NiCrSi-NiSi)
1) |t| = absolute value °C
Standard Type Standard tolerance Special tolerance
ASTM E230/ANSI
MC96.1
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)
1)
(333 to 750 °C)
1)
(333 to 1 200 °C)
1)
(0 to 760 °C) ±1.1 K or ±0.004 |t|
1)
(–200 to 0 °C)
1)
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 1 260 °C)
1)
(375 to 750 °C)
1)
(375 to 1 000 °C)
1)
1)
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
t
90
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
t
90
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.
10 Endress+Hauser
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