Endress+Hauser TMS31 Specifications
TI01443T/09/EN/01.18
71432308
2018-12-20
Products Solutions Services
Technical Information
iTHERM
MultiSens Bundle TMS31
Metallic flexible rope multipoint for silos and
storage tank applications
Application
• Oil storage tanks
• Bulk material silos
Your benefits
• Easy installation and process integration thanks to a high degree of customization
• Flexible rope that adapts to different silos or tank operating conditions (filling,
emptying, storage, …)
• Intrinsically safe components for use in Ex areas
• Highly robust design for a long product lifetime and continuous monitoring in all
conditions
Table of contents
iTHERM MultiSens Bundle TMS31
Function and system design ................... 3
Measuring principle ............................ 3
Measuring system ............................. 3
Equipment architecture ......................... 4
Input ..................................... 6
Measured variable ............................. 6
Measuring range .............................. 6
Output ................................... 6
Output signal ................................ 6
Family of temperature transmitters ................. 7
Power supply .............................. 7
Wiring diagrams .............................. 7
Performance characteristics .................. 10
Accuracy .................................. 10
Influence of ambient temperature ................. 11
Response time .............................. 11
Shock and vibration resistance .................... 11
Calibration ................................. 11
Installation ............................... 12
Mounting location ............................ 12
Orientation ................................ 12
Installation instructions ........................ 12
Material certification .......................... 21
Test report and calibration ...................... 21
Ordering information ....................... 22
Accessories ............................... 25
Device-specific accessories ...................... 25
Communication-specific accessories ................ 26
Service-specific accessories ...................... 26
Documentation ............................ 27
Environment .............................. 13
Ambient temperature range ..................... 13
Storage temperature .......................... 13
Humidity .................................. 13
Climate class ............................... 14
Degree of protection .......................... 14
Electromagnetic compatibility (EMC) ............... 14
Process .................................. 14
Process temperature range ...................... 14
Process pressure range ......................... 14
Mechanical construction .................... 14
Design, dimensions ........................... 14
Weight ................................... 19
Materials .................................. 19
Process connection ........................... 20
Operability ............................... 20
Certificates and approvals ................... 21
CE Mark .................................. 21
Hazardous area approvals ....................... 21
Certification HART ........................... 21
Certification FOUNDATION Fieldbus ................ 21
Certification PROFIBUS® PA ..................... 21
Other standards and guidelines ................... 21
2 Endress+Hauser
iTHERM MultiSens Bundle TMS31
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)
Endress+Hauser 3
iTHERM MultiSens Bundle TMS31
2 3
4
7
1
5
6
A0038295
1 Application example in a silo.
1 Mounted multipoint thermometer, 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.
2 TMT82 or other Ex approved transmitters
3 RSG45 with data recording, calculation, logic control, limit monitoring, alarms and events
4 Edge device
5 Device configuration with application software FieldCare
6 Fieldbus to DCS/PLC
7 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.
Equipment architecture
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.
The temperature probe-only version consists of many sub-assemblies:
• Insert
• Rope
• Weight
• Process connection
• Neck (see below for a more detailed description)
In general the instrument measures the temperature profile inside the process environment by
means of many sensors wrapped around a rope, jointed to a suitable process connection which
ensures the right tightness level.
The temperature probe + diagnostic version combines the temperature probe with a head
transmitter, which is available with enhanced accuracy and reliability compared to directly wired
sensors. Output communication protocols available are: Analog output 4 to 20 mA, HART®,
4 Endress+Hauser
iTHERM MultiSens Bundle TMS31
1
2b
4
8
3
5
2a
6
7
10b
9
9
11
10a
9
11
2c
PROFIBUS® PA, FOUNDATION Fieldbus™. Externally the extension cables are wired into the junction
box, which can be directly mounted or remotely as an option.
Design
A0038296
2 MultiSens Bundle design with open support on the left side, MultiSens Bundle design with open frame
with protection in the middle and tube neck design on the right side
Description and available options
Hinged cover junction box for electrical connections. It includes
components such as electrical terminals, transmitters and cable
1: Head
2a: Open supporting frame
2b: Supporting frame with cover
2c: Tube neck
3: Compression fitting
4: Process connection
5: Eyebolt
6: Toggle joint
glandes.
• 316/316L
• Other materials on request
Modular frame support that is adjustable for all available junction
boxes.
316/316L
Modular support that is adjustable for all available junction boxes
and ensures extension cable inspection.
316/316L
Modular tube frame support adjustable for all available junction
boxes
316/316L
High reliability for tightness between process and external
environment, for a wide range of process fluids concentration and
severe combination between temperature and pressure.
• 316L
• 316H
Represented by a flange according to international standards, or
engineered to satisfy specific process requirements. → 20
Lifting device for easy handling during installation phase.
316
Connection between the rope and the process connection.
316
Endress+Hauser 5
Description and available options
7: Ogives
8: Insert
9: Rope
10a: Swage eye
10b: Metric swage thread
11: Weight
iTHERM MultiSens Bundle TMS31
Insert guide for the correct positioning of the measuring sensing
element.
• 316
• 316L
Thermocouple (type J, K) grounded and ungrounded execution or
RTD (Pt100 wire wound).
Metallic rope.
316
Ring-bolt end connection.
316
Threaded end connection.
316
Weight to maintain the rope pretensioned and in a straight position
during working condition (i.e. tank filling).
• 316
• 316L
Measured variable
Measuring range
Input
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
Thermocouples (TC) - flying
leads - as per IEC 60584 and
ASTM E230
1) Limited by jacket material of insert
Type J (Fe-CuNi)
Type K (NiCr-Ni)
Internal cold junction (Pt100)
Cold junction accuracy: ± 1 K
Max. sensor resistance: 10 kΩ
Type J (Fe-CuNi)
Type K (NiCr-Ni)
–40 to +520 °C (–40 to +968 °F)
–40 to +800 °C (–40 to +1 472 °F)
–210 to +520 °C (–346 to +968 °F), typical sensitivity
above 0 °C ≈ 55 μV/K
–270 to +800 °C (–454 to +1 472 °F)
sensitivity above 0 °C ≈ 40 μV/K
1)
, typical
Output
Output signal
6 Endress+Hauser
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.
iTHERM MultiSens Bundle TMS31
Family of temperature transmitters
Thermometers fitted with iTEMP transmitters are an installation-ready complete solution to
improve temperature measurement by significantly increasing accuracy and reliability, when
compared to direct wired sensors, as well as reducing both wiring and maintenance costs.
PC programmable head transmitters
They offer a high degree of flexibility, thereby supporting universal application with low inventory
storage. The iTEMP transmitters can be configured quickly and easily at a PC. Endress+Hauser offers
free configuration software which can be downloaded from the Endress+Hauser Website. More
information can be found in the Technical Information.
HART® programmable head transmitters
The transmitter is a 2-wire device with one or two measuring inputs and one analog output. The
device not only transfers converted signals from resistance thermometers and thermocouples, it also
transfers resistance and voltage signals using HART® communication. It can be installed as an
intrinsically safe apparatus in Zone 1 hazardous areas and is used for instrumentation in the
terminal head (flat face) as per DIN EN 50446. Swift and easy operation, visualization and
maintenance 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
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
Endress+Hauser 7
Wiring diagrams for TC and RTD connection
iTHERM MultiSens Bundle TMS31
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)
-
+
+
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
3 Wiring diagram of the single sensor input head transmitters (TMT18x)
A0016712-EN
4 Wiring diagram of the dual sensor input head transmitters (TMT8x)
8 Endress+Hauser
A0016711-EN
iTHERM MultiSens Bundle TMS31
1
CHANNEL ERROR
COM/
ERR
1:
2:
3-8: Not Used
Write Lock
Simulate Enable
PWR
2 3 5 6 7 84
Do not open !
CH1
RTD
Ω
TC
mV
CH1...CH8
H
H
H
H
H
S
L
L
L
L
L
L
L
FOUNDATION
Fieldbus
TM
0032
0123456789101
1019876543210
TMT125-XXXXXXXX
Ser.No.:
TAG No.:
Order Code:
TMT125
PTB 05ATEX xxxxX
II 3G EEx nAII T4
II 3G EEx nLIIC T4
II (3)G [EEx nL] IICT4
PTB 05ATEX xxxx
II2 (1G/D)G EEx ia IICT4
II(1) GD [EEx ia ] IIC
-40°C<Ta < 70°C
FISCO according to IECTS 60079-27
DEVICE ID 452B4810CD-...
Avoid electrostatic charge!
inst. per XA056R/09/a3/XX.XX
-
LH
+
#
4-wire
2-wire
3-wire
A0006330-EN
5 Wiring diagram of multi-channel transmitter
Endress+Hauser 9
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