The TMT162C thermocouple thermometer comprises a
measuring insert with a type J or K thermocouple and an
electronic field transmitter with HART
Fieldbus™ or PROFIBUS
Features and benefits
• Dual compartment housing
• Backlit display with large measured value, bargraph
and fault condition indication
• Galvanic isolation 2 kV (sensor input to the output)
• Wide range of threaded thermowell connections available as standard, additional connections available on
request
• Replaceable measuring insert comprising a mineralinsulated tube (SS 316L/1.4404)
• Thermocouple (type J or K) with accuracy class 1 or 2
(IEC 60584)
• Aluminum or stainless steel housing,
degree of protection IP67, NEMA 4x
• Approvals for hazardous areas:
Flameproof enclosure (Ex d)
Intrinsic safety (Ex ia)
Non-sparking (Ex nA)
• Optional: 2 thermocouples can be connected, e.g. for
redundant applications or differential measurement
• Optional factory calibration
®
PA protocol.
®
, FOUNDATION
TI267t/02/en
71093904
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TMT162C
Function and system design
Measuring principleIn the thermocouple, two electrically conductive conductors made of different metals are connected at the ends
(thermocouple), thereby producing a thermoelectric circuit. The weld point forms the "measuring point" and
the other end with the free wires forms the "cold junction". When the "measuring point" of this thermoelectric
circuit is heated, a current flows through the circuit and a weak electrical voltage (known as the thermoelectric
voltage) is generated.
If the measuring point and the reference junction have the same temperature, a thermoelectric voltage is not
generated. The strength of the thermoelectric voltage (also know as the electromagnetic force), primarily
depends on the materials of the thermocouple and the size of the temperature differential. The sensors (thermocouple) meet the requirements of IEC 60584 and ANSI MC96.1.
Measuring system
TMT162C
TMT162R_G_dd_07_xx_04
The TMT162C thermocouple thermometer comprises a measuring insert with a thermocouple (TC) and the
iTEMP® TMT162 field transmitter which can be configured using the HART®, FOUNDATION Fieldbus™ or
PROFIBUS® PA protocol. A thermowell can be ordered separately.
The sensor element is integrated in the tip of the measuring insert and complies with IEC 60584 and ANSI
MC96.1. It withstands loads that typically occur in the most common industrial processes. The sensor element
consists of 2 metal alloy wires, type J (iron/copper nickel) or type K (nickel chromium/nickel). The measuring
range and tolerance errors differ depending on the thermocouple. The measuring insert is a replaceable unit
and is installed in a thermowell. A spring system presses it against the base of the thermowell to improve the
transmission of heat.
The transmitter housing is made of die-cast aluminum or stainless steel. It can be purchased with or without
an LC display. The minimum degree of protection, IP65, is achieved by sealing glands at the cable entry and
the thermometer connection. Depending on the customer's requirements, customers can choose from thermowells constructed from welded tubes and thermowells made of drilled barstock material. The thermowells
are available in various shapes and sizes and with a wide range of process connections (thread, flange or weldon connections, see page 12).
Measurement range
InputDesignationMeasuring range limitsMin. span
Thermocouples (TC)
to IEC 60584 part 1
Type J (Fe-CuNi)
Type K (NiCr-Ni)
• Internal cold junction (Pt100)
• Accuracy of cold junction: ± 1 K
• Max. sensor resistance 10 kΩ (if sensor resistance is greater than 10 kΩ, error message as per NAMUR NE 89)
-210 to +1200 °C (-346 to 2192 °F)
-270 to +1372 °C (-454 to 2501 °F)
50 K
50 K
Performance characteristics
Operating conditionsAmbient temperature limits
• Without display: -40 to +85 °C (-40 to 185 °F)
• With display: -40 to +80 °C (-40 to 176 °F)
For use in Ex area, see Ex certificate.
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Note!
!
At temperatures < -20 °C (-4 °F), the display may react slowly. Readability of the display cannot be guaranteed
at temperatures < -30 °C (-22 °F).
Storage temperature• Without display: -40 to +100 °C (-40 to 212 °F)
• With display:-40 to +80 °C (-40 to 176 °F)
Process pressure/flow velocity
The load limits of the thermometer depend on the thermowell used and are listed in the technical information
specific to the individual thermowells (see page 12). Factors that affect the load limits include the process pressure, flow velocity, density of the medium, temperature, immersion depth, length of the thermowell in the
flowing medium etc. In critical situations, a load capacity calculation for the thermowell can be ordered from
Endress+Hauser.
Shock and vibration resistance
3 g (max. value)/ 10 to 500 Hz as per IEC 60 068-2-6
Aluminum AlMgl, anodized in blackStainless steel 1.4404 (AISI 316L)
Electromagnetic compatibility
(EMC)
Installation instructions
CE Electromagnetic Compatibility Compliance
EMC meets all relevant requirements listed under EN 61326 Series and NAMUR NE21. Details as per declaration of conformity.
This recommendation is a uniform and practical way of determining whether the devices used in laboratories
and process control are immune to interference with an objective to increase its functional safety.
ESD (Electrostatic discharge)IEC 61000-4-26 kV cont., 8 kV air
Electromagnetic fieldsIEC 61000-4-30.08 to 2 GHz
(0.08 to 4 GHz for FF)
0.08 to 2 GHz for HART
2 to 2.7 GHz
Burst (fast transient)IEC 61000-4-41 kV (2 kV for HART)
surgeIEC 61000-4-51 kV asym. (0.5 kV sym. for HART)
Conducted RFIEC 61000-4-60.01 to 80 MHz10 V
10 V/m
10 V/m
30 V/m
1V/m
Installation examples
T09-TMT162RC-11-xx-xx-xx-003
A: In pipes with a small cross section the sensor tip should reach or extend slightly past the center line of the pipe (= L).
B, D: Tilted installation
C: Flanged installation
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!
TMT162C
The immersion length of the thermometer influences the accuracy. If the immersion length is too small then
errors in the measurement are caused by heat conduction via the process connection and the pipe wall. If
installing into a pipe then the immersion length must be half of the pipe diameter, ideally.
• Installation possibilities: Pipes, tanks or other plant components
• Minimum immersion length = 80 to 100 mm (3.15 to 3.94 in)
The immersion length must be at least 8 times the protection tube diameter. Example: Protection tube diameter 12 mm (0.47 in) x 8 = 96 mm (3.8 in). Recommended standard immersion length according to DIN
43772: 120 mm (4.72 in)
• ATEX certification: Always take note of the installation regulations!
Note!
When operating in small nominal bore pipes it must be guaranteed that the protection tube tip is long enough
to extend past the pipe center line (see Pos. A and B). A further solution could be an angled (tilted) installation
(see Pos. C and D). When determining the immersion length all thermometer parameters and the process to
be measured must be taken into account (e.g. flow velocity, process pressure).
In the case of pipes in which the direction of flow changes, extreme caution should be exercised when selecting
the measuring point since these flows can cause the measured value to fluctuate. With regard to corrosion, the
choice of material for the thermowell is particularly important.
If the thermometer is to be disassembled into its individual component parts, the specified tightening torques
have to be observed when subsequently reassembling the thermometer in order to comply with the IP protection class of the coupling between the field transmitter and thermowell.
System components
Field transmitterThe field transmitter offers high reliability particularly in harsh industrial environments due to the dual com-
partment housing and fully potted electronics.
Temperature field transmitter iTEMP® TMT162
* Dimensions without display = 112 mm (4.41“)
T09-TMT162ZZ-06-00-xx-xx-001
• Material: die-cast aluminum housing AlSi10Mg with powder coating on polyester base or stainless steel 1.4435 (AISI 316L)
• Separate electronics compartment and connection compartment
• Blue backlit display with large measured value, bargraph and fault condition
indication
• Gold-plated terminals prevent corrosion and additional measured errors
For detailed information, see Technical Information iTEMP
(see page 12).
®
TMT162
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TMT162C
Neck tubeA neck tube is integrated between the thermowell and the field transmitter to prevent the field transmitter from
overheating as a result of the process temperature. This neck tube is made up of one or more different pipe
fittings (N, L = nipples and C, U = coupling, unions). The material of the neck tube is SS 316L/1.4404 as standard.
The neck tube versions and standard lengths (N) can be selected as follows:
.
In addition to the standard versions listed, neck tubes with specific lengths can be ordered as part of the product
structurefor the measuring insert.
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TMT162C
As illustrated in the following figure, the neck tube length may influence the temperature in the field transmitter. It is necessary that this temperature is kept within the limit values defined in the chapter "Operating conditions".
Heating of the field transmitter consequent to the process temperature.
Temperature in the field transmitter = ambient temperature + ΔT
a0010513-en
ThermowellThe assembly is designed for installation in an existing thermowell, or a thermowell that has to be ordered sep-
arately. For this purpose, the neck tube connection to the thermowell is available in various sizes.
To make selection easier, please use the table with the insertion lengths of the measuring insert (ML) which is
described in the next section.
Measuring insert
Omnigrad S TMT162C, dimensions in mm (inch)
T09-TMT162RC-04-xx-xx-xx-000
The insertion length (ML) of the measuring insert can be selected anywhere in the range between 50 and 990
mm (1.97 and 39 in). Insertion lengths over 990 mm (39 in) are available on request.
The insertion length (ML) must be selected depending on the total length of the thermowell (A) and the type
of thermowell used (applies to standard thermowell base sizes). This also applies when ordering the measuring
insert as a spare part. Please refer to the table below for exact details.
Thermowell
type
TW10*ML = A - 8 mm (0.31 in)TA535ML = A - 8 mm (0.31 in)TA560ML = A - 11 mm (0.43 in)
TW11*ML = A - 8 mm (0.31 in)TA540ML = A - 10 mm (0.4 in)TA566ML = A - 11 mm (0.43 in)
ML in mm (inch)Thermowell
type
ML in mm (inch)Thermow-
ell type
ML in mm (inch)
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TMT162C
Thermowell
type
TW12*ML = A - 8 mm (0.31 in)TA541*ML = A - 10 mm (0.4 in)TA570ML = A - 11 mm (0.43 in)
TW13*ML = A - 8 mm (0.31 in)TA550ML = A - 11 mm (0.4 in)TA571ML = A - 11 mm (0.43 in)
TW10**ML = A - 15 mm (0.6 in)TA555ML = A - 10 mm (0.4 in)TA572ML = A - 11 mm (0.43 in)
TW11**ML = A - 15 mm (0.6 in)TA556ML = A - 10 mm (0.4 in)TA575ML = A - 11 mm (0.43 in)
TW12**ML = A - 15 mm (0.6 in)TA557ML = A - 10 mm (0.4 in)TA576ML = A - 10 mm (0.4 in)
TW13**ML = A - 15 mm (0.6 in)TA562ML = A - 11 mm (0.43 in)
TW15**ML = A - 12 mm (0.47 in)TA565ML = A - 11 mm (0.43 in)
ML in mm (inch)Thermowell
type
ML in mm (inch)Thermow-
If the thermowell selected also contains a neck tube (e.g. TW15), the total length A of the thermowell is the
sum of the length of the thermowell L plus the length of the neck tube E (A = L + E).
Caution!
"
* TMT162C with NPT threaded connection to the thermowell
** TMT162C with metric (M24x1.5) connection to the thermowell
WeightFrom 1.5 to 5 kg (3.3 to 12.1 lbs) for standard options (aluminum housing).
Electronics
ell type
ML in mm (inch)
Wiring diagram
The iTEMP® temperature field transmitter TMT162 is a two-wire transmitter with analog output or fieldbus
protocol, two (optional) measuring inputs for thermocouples type J or type K. The LC display shows the current
measured value digitally and as a bar graph with an indicator for alarms.
Corrosion detection
Corrosion of the sensor connections can lead to corruption of the measured value. The field transmitter offers
the option of detecting corrosion on thermocouples and resistance thermometers with a 4-wire connection
before measured value corruption occurs.
If the conductor resistance exceeds plausible limits, the transmitter shows a status message on the display and
forwards the corresponding message to the higher-order system via HART, FOUNDATION Fieldbus™ or
PROFIBUS
®
PA protocol.
Optional 2-channel functions
These functions increase the reliability and availability of the process values:
• Sensor backup switches to redundant sensor if primary sensor fails
• Temperature dependent switching between sensors, which have advantages in different ranges
• Drift alert or alarm if sensor 1 and 2 deviate from one another
Electrical connection
TMT162Cx-04-xx-xx-en-000
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TMT162C
Supply voltage
HART
®
Ub = 11 to 40 V (8 to 40 V without display), reverse polarity protection
Note!
!
(according to IEC 61010-1, CSA 1010.1-92)
The TMT162 must be powered by a 11 to 40 VDC power supply with a limited power according to NEC Class 02 (low
voltage, low current) limited to 8 A and 150 VA in case of a short circuit.
FOUNDATION Fieldbus™
U
= 9 to 32 V, reverse polarity protection,
b
max. voltage U
According to IEC 60079-27, FISCO/FNICO
= 35 V
b
PROFIBUS® PA
U
= 9 to 32 V, reverse polarity protection,
b
max. voltage U
According to IEC 60079-27, FISCO/FNICO
= 35 V
b
Certificates and approvals
CE-MarkThe device meets the legal requirements of the EC directives. Endress+Hauser confirms that the device has
been successfully tested by applying the CE mark.
Hazardous area approvals
ATEX II1G EEx ia IIC T6/T5/T4 HART
Power supply (+ and - terminals)Ui ≤ 30 V DC
®
I
≤ 300 mA
i
P
≤ 1000 mW
i
C
≤ 5 nF
i
L
≈ 0
i
FOUNDATION Fieldbus™/PROFIBUS® PA
≤ 17.5 V DC or:
U
i
I
≤ 500 mA
i
P
≤ 5.5 W
i
C
≤ 5 nF
i
L
= 10 μH
i
≤ 24 V DC
U
i
I
≤ 250 mA
i
P
≤ 1.2 W
i
Suitable for connecting to a fieldbus system in accordance with
the FISCO/FNICO model (valid for FOUNDATION Fieldbus™
protocol)
ATEX II3G EEx nA II T6/T5/T4
HART
®
FOUNDATION Fieldbus™
PROFIBUS® PA
Power supply (+ and - terminals)U ≤ 40 V DCU ≤ 32 V DC
OutputI = 4 to 20 mA Curr. consumption I ≤ 12 mACurr. consumption I ≤ 11 mA
Ta = -40 °C to +55 °C
Ta = -40 °C to +70 °C
Ta = -40 °C to +80 °C
FOUNDATION Fieldbus™
PROFIBUS
®
PA
U ≤ 35 V DC
P ≤ 3 W
Temperature range for dust (electronics) Ta = -40 °C to +80 °C
For further details on the available Ex versions (ATEX, CSA, FM, etc.), please contact your nearest
Endress+Hauser sales organization. All relevant data for hazardous areas can be found in separate Ex
documentation. If required, please request copies.
PED approvalThe thermometer complies with paragraph 3.3 of the Pressure Equipment Directive (97/23/CE) and is not
marked separately.
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TMT162C
Test report and calibrationWith regards to the tests and calibration, the "Inspection Report" consists of a compliance declaration for the
essential points of the standard IEC 60584.
The "Factory calibration" is carried out in an EA (European Accreditation) authorized laboratory of
Endress+Hauser according to an internal procedure. A calibration may be requested separately according to an
EA accredited procedure (SIT calibration). Calibration is carried out on the thermometer insert.
Other standards and
guidelines
• IEC 60529: Degree of protection by housing (IP-Code)
• IEC 61010-1: Safety requirements for electrical measurement, control and laboratory instrumentation.
• EN 61326-series: Electrical equipment for measurement, control and laboratory use - EMC requirements.
• NAMUR: User association of automation technology in process industries (www.namur.de)
• NEMA: Standardization association for the electrical industry in North America.
Ordering information
Product structure
TMT162CHousing material; Approval
AAlu; housing, general purpose
BAlu; ATEX II1G EEx ia IIC T4/T5/T6
EAlu; ATEX II 2GD EEx d IIC T6
HAlu; ATEX EEx d, EEx ia
LAlu; ATEX II 3G EEx nA IIC T4/T5/T6
MAlu; ATEX II 1/2GD EEx d IIC T6
P316L; ATEX II 1G EEx ia IIC T4/T5/T6
Q316L; ATEX II 2GD EEx d IIC T6
R316L; ATEX II 1/2GD EEx d IIC T6
TAlu; ATEX II 1/2GD EEx ia IIC T4/T5/T6
1Alu; NEPSI Ex ia IIC T4-T6
3Alu; NEPSI Ex d IIC T4-T6
Configuration; Communication
BTC; HART
ETC; PROFIBUS PA
FTC; FOUNDATION Fieldbus
YSpecial version, to be specified
Neck length N; Type
152 mm; nipple type L
2104 mm; nipple + union type LU
396 mm; nipple + union type LC
4156 mm; nipple + union + nipple type LUN
5148 mm; nipple + union + nipple type LCN
9... mm, as specified
Thermowell type
0not needed
1Bar stock, to order separately
2Pipe, to order separately
Thermowell connection
DThread G½"
NThread ½" NPT-M
PThread ¾" NPT-M
RThread R ½", JIS B 0203
SThread R ¾", JIS B 0203
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TMT162C
UThread M24x1.5-F
5Thread ½" NPT-F
9Special version, to be specified
TC type; Material
A1x K IEC584, 6 mm; INCONEL600
B2x K IEC584, 6 mm; INCONEL600
C1x J IEC584, 6 mm; 316
D2x J IEC584, 6 mm; 316
G1x K ANSI, 6 mm; INCONEL600
H2x K ANSI, 6 mm; INCONEL600
J1x J ANSI, 6 mm; 316
K2x J ANSI, 6 mm; 316
9Special version, to be specified
TC Purity; Hot junction
1Cl. 2; grounded
2Cl. 1; grounded
4High, cl. 1, hot junction grounded
5Cl. 2; ungrounded
6Cl. 1; ungrounded
8High, cl. 1, hot junction insulated
9Special version, to be specified
Insertion length ML
X... mm
Y... mm, as specified
TMT162C-
⇐ Order code, complete
This ordering information can give an overview about the available order options. The Endress+Hauser sales
organization can provide detailed ordering information and information on the order code.
Questionnaire
A0011423
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TMT162C
Documentation
Technical information:
• Thermocouple thermometer Omnigrad TSC - General information (TI090T/02)
• Temperature field transmitter iTEMP
• Thermocouple insert TC type K, J, T - Omniset TEC300 (TI226T/02/en)
Fitting thermowells:
• TW10 (TI261T/02)
• TW11 (TI262T/02)
• TW12 (TI263T/02)
• TW13 (TI264T/02)
• TW15 (TI265T/02)
• TA540 (TI166T/02)
Operating instructions temperature field transmitter iTEMP® TMT162:
•HART®-protocol (BA132R/09/)
• FOUNDATION Fieldbus™-protocol (BA224R/09/)
• PROFIBUS® PA-protocol (BA275R/09/)
Hazardous area supplementary documentation:
• ATEX II 1G (XA005T/02/a3)
• ATEX II 1/2G or 2G, ATEX II 1/2D or 2D (XA006T/02/a3)
®
TMT162 (TI086R/09/en)
• TA550 (TI153T/02)
• TA555 (TI154T/02)
• TA557 (TI156T/02)
• TA560 (TI159T/02)
• TA565 (TI160T/02)
• TA576 (TI163T/02)
Instruments International
Endress+Hauser
Instruments International AG
Kaegenstrasse 2
4153 Reinach
Switzerland