Thermocouple thermometer EEx-d certified, replaceable insert, pipe
thermowell, process connection threaded, flanged or sliding.
PCP (4...20 mA), HART® or PROFIBUS-PA® electronics
Range of uses
The Omnigrad S TC63 is an industrial thermometer (thermocouple TC: K or J) a neck and a thermowell from pipe.
It is developed for the use in the chemical, petrochemical and
energy industries, but suitable also for other generic applications.
In compliance to EN 50014/18/20 (ATEX certification) it is
therefore particularly suitable also for hazardous areas.
When required, it’s also available with a transmitter
(PCP, HART® or PROFIBUS-PA®) into the housing.
The process connection of the thermowell is threaded or
flanged in compliance to the standard of process requirements.
Application areas
• Chemicals industry
• Energy industry
• Gas Processing industry
• Petrochemical industry
• General industrial services
TI287T/02/en
Features and benefits
• Several types of process connection
• Several type of materials available for the thermowells
• Customized immersion length
• Aluminium housing, with protection grade from IP66 to IP68
• Thermocouple with hot junction grounded or ungrounded in
mineral oxide cable (MgO cable) diameter: 3 or 6 mm
• PCP, HART® and PROFIBUS-PA®,
(4...20 mA 2-wire transmitters)
• The accuracy of the thermocouple TC (K (NiCr-Ni) and
J (Fe-CuNi)) are: Cl. 1 - 2 (EN 60584) or Cl. Special - Standard
(ANSI MC96.1)
• The thermocouple TC (K or J) are available in single or double
element
• ATEX II 2 GD EEx-d IIC certification
• ATEX II 1/2 GD EEx d IIC certification
4 0
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Omnigrad S -TC63
Function and system design
Measuring principleThe thermocouple (TC) thermometer’s sensing element consists of two metal wires that are homogeneous but
different one from the other and insulated along their entire length. The two wires are welded together at one
end, known as the “measurement or hot junction”. The other end, where the wires are free, is known as the
“cold or reference junction” and is connected to a electromotive force measurement circuit where the force is
generated by the different thermoelectric power of each of the thermocouple’s wires if there is a temperature
difference between the hot joint (T1) and the cold joint (Seebeck effect). The cold junction has to be “compensated” with reference to the temperature of 0°C (T0). The function that links the electromotive force to the
temperatures T1 and T0 is a curve whose characteristics depend on the materials used in the construction of
the thermocouple. Some thermocouples curves, and particularly those most reliable for the purposes of industrial readings, are those compliant with standards DIN EN 60584 and ANSI MC96.1.
Equipment architecture The construction of the TC63 temperature sensor is based on the following standards:
• EN 50014/18 (housing)
• Neck (with nipple and "3 union")
• EN 60584 (insert)..
• Pipe thermowells standard like: ENI, MONTEDISON, ENEL, ecc.
The housing is in painted aluminium alloy; it is suitable
to contain a transmitter and/or the ceramic block of the
insert; the “Ingress Protection” is from IP66 to IP68.
The neck composed by one or two nipple and one "3
union", standard or EEx- execution, it is the exstension
between the head and the thermowell.
The hot junction of the thermocouple (type K or J) are
positioned close to the tip of the probe. The thermocouple is available in two versions: grounded or
ungrounded hot junction. The electrical structure of the
thermocouple always complies with EN 60584/61515
or ANSI MC96.1/ASTM E585 standard rules.
The thermowell is from pipe, with wetted part, straight
or tapered. The process connection on the thermowell
is: threaded or flanged, in some case it can be to sliding
also.
Fig. 1: TC63 with the various types of process connections and end parts of the probe
Material & Weight
Operating conditions
HousingInsertNeckThermowellWeight
aluminium
epoxy coated
sheath in
SS 316L/1.4404
Inconel® 600/2.4816.
nipple and 3 union:
SS 316/1.4401,
A105
thermowells: SS 316/1.4401, SS
446/1.4749 Inconel®
600/2.4816.
From 1.5 to 5.0
kg for standard
options
Performance
Operating condition or testProduct type or rulesValue or data of test
Acceleration3 g of peak
Frequencyfrom 10Hz to 500Hz and back
Time test10 hours
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Omnigrad S -TC63
Accuracy
Thermocouple
and range °C
J (Fe-CuNi)
0 ...750°C
K (NiCr-Ni)
0...1250°C
Thermocouple
and range °C
J (Fe-CuNi)
-40° ... 750°C
K (NiCr-Ni)
-40 ... 1200°C
Others errors
Transmitter maximum errorSee the corresponding documentation (codes at the end of the document)
Display maximum error0.1% FSR + 1 digit (FSR = Full Scale Range)
ClassMax deviationClassMax deviationCable colors
Stand-
ard
Stand-
ard
ClassMax deviationClassMax deviationCable colors
2+/-2.5°C (-40...333°C)
2+/-2.5°C (-40...333°C)
+/-2.2°C (0...293°C)
+/-0.75%o(293...750°C)
+/-2.2°C (0...293°C)
+/-0.75%o(293...1250°C)
ItI = absolute temperature value in °C
+/-0.0075 |t| (333...750°C)
+/-0.0075 |t| (333...1200°C)
ItI = absolute temperature value in °C
ANSI MC96.1
Special+/-1.1°C (0...275°C)
+/-0.4%o(275...750°C)
Special+/-1.1°C (0...275°C)
+/-0.4%o(275...1250°C)
EN 60584
1+/-1.5°C (-40...375°C)
+/-0.004 |t| (375...750°C)
1+/-1.5°C (-40...375°C)
+/-0.004 |t| (375...1000°C)
Response time Tests, with the TC insert, in water at 0.4 m/s (according to IEC 60751) from 23 to 33°C:
Stem diameter of the insertSensing element typeTemperature of testResponse time
Insulation
SS 316 - d. 6 mmK (NiCr-Ni), J (Fe-CuNi)t
Measurement Insulation typeResult
Insulation resistance between terminals and probe sheath
according to EN 60584, test voltage 500 V
50
t
90
> 1GΩ at 25°C
> 5 MΩ at 500°C
2,5 s
7,0 s
+ black
- red
+ yellow
- red
+ black
- white
+ green
- white
Self heating Negligible when the E+H iTEMP® transmitters are employed.
Installation
The TC63 can be installed on pipes or tanks by means of threaded or flanged connections. The counterparts
for process connections and gaskets, when required, are not supplied with the sensor and must be purchased
separately by the user. The immersion length must take into account all the parameters of the thermometer
and the process to measure. If the immersion is too low, an error may be generated in the temperature recorded
due to the lower temperature of the process fluid near to the walls and heat transfer, which takes place through
the sensor stem. The incidence of such an error can be not negligible if there is a big difference between the
process temperature and the ambient temperature. To prevent measuring errors of this kind, it is advisable to
use thermowells with a small diameter and an immersion length (L) of at least 100÷150 mm. In small section
ducts the tubing’s axis must be reached and preferibly slightly exceeded by the tip of the probe (see fig. 2A2C). Insulation of the outer part of the sensor reduces the effect produced by a low immersion. Alternatively,
it is also possible to adopt a tilted installation (see fig. 2B-2D).
For a best installation, in the industries, it's better to follow the rule: h ( d, L > D/2 + h. As far as corrosion is
concerned, the base material for parts in contact with the fluid is able to withstand the most common corrosive
agents up to the highest temperatures. Even the nipples and 3 elements coupling supplied with the connection
fitting of the instrument are able to withstand a wide range of aggressive substances. With regard to corrosion,
the base material of the wetted parts (SS 316L, SS 316Ti, Hastelloy
common corrosive media right up to even the highest temperatures.
For further information on specific applications, contact the E+H Customer Service Department.
Disassembled components of the sensors must be reassembled with the recommended clamping torques in
order to ensure the appropriate IP protection class within the sensor-housing coupling.
® C276 or Inconel®600) can tolerate the
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Omnigrad S -TC63
hd
≈
L> D/2+h
Fig. 2: Installation examples
METALLICSHEATH
A
C
D
d
h
L
ØD
welded coupling
B
B
THERMAL
INSULATING
System components
Housing The protection housing, our "TA21H", commonly referred to the “connection head”, is used to contain and
protect the terminal block or the transmitter and to join the electric connections to the mechanical component.
The TA21H used for the TC66 is compliant
with EN 50014/18 and EN 50281-1-1,
EN 50281-1-2 standards (EEx-d certification
for explosion proof type of protection).
The matching of the head with the extension
below the head and the cover (threaded)
ensures a degree of protection from IP66 to
115
~
IP68.
The head also has a chain to connect the body
to the cover, which facilitates the use of the
instrument during the maintenance on systems. The single or double threaded electrical
cable entry can be: M20x1.5, 1/2” NPT or
3/4” NPT, G1/2".
64
Fig. 3: Housing TA21H
Ø90
½ NPT, NPT
¾
G ½", M20x1.5
39
ø38
ø72
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Omnigrad S -TC63
Extension neckA special extension is inserted between the husing and the thermowell connection, this part is called neck. The
neck is constituted by a tube assembled to hydraulic hardware (nipples or joints) that is suitable to allow the
adjustment of the sensor to the thermowell.
In addition to the standard versions listed below, it is also possible to order the extension neck by specifying
the desired length (see “Sales structure” chart at the end of this document). In the TC63 the standard lengths
(N) and the versions of the extension neck can be selected among the following options:
Tp Material N lengthmmThreadC mmNeck
N316691/2" NPT M 8 A
N3161091/2" NPT M 8 A
NU316961/2" NPT F 8 D
NUN3161481/2" NPT M 8 F
NA10569 1/2" NPT M8 A
NA1051091/2" NPT M 8 A
NUA105961/2" NPT F 8 D
NUNA1051481/2" NPT M 8 F
dwg type
A
N
C
D
N
C
N
C
F
As illustrated by the drawing in fig. 4, the length
°C
30
25
of the extension neck may influence the temperature in the head. It is necessary that this
temperature is kept within the limit values
defined in the paragraph “Operating Condi-
20
Process temperature
15
tions”.
Before choosing the connection, it is better to
verify this graphic and therefore to choose a
suitable extension to avoid the heating of the
10
head.
Head heating
5
0
100 125150 17520075
Neck extension length
225 250
570°C
400°C
220°C
mm
Fig. 4:Heating of the head caused by the process temperature
Electronic head transmitterThe required type of output signal can be obtained by choosing the correct head mounted transmitter.
Endress+Hauser supplies “state-of-the-art” transmitters (the iTEMP® series) built in 2-wire technology and
with 4…20 mA output signal, HART® or PROFIBUS-PA®. All of the transmitters can be easily programmed
using a PC:
Head transmitterCommunication software
PCP TMT181ReadWin® 2000
® TMT182ReadWin® 2000, FieldCare, Hand held module DXR275, DXR375
HART
PROFIBUS PA
® TMT184FieldCare
In the case of PROFIBUS-PA® transmitters, E+H recommends the use of PROFIBUS® dedicated connectors.
The Weidmüller type is provided as a standard option. For detailed information about transmitters, please refer
to the relevant documentation (refer to TI codes at the end of the document). If a head-mounted transmitter
is not employed, the sensor probe may be connected through the terminal block to a remote converter (i.e.
DIN rail transmitter). The customer may specify the configuration desired during the order phase.
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Page 6
The head-mounted transmitters available are:
1
-
+
-
+
1
DescriptionDwg
TMT181: PCP 4…20 mA.
The TMT181 is a PC programmable transmitters
TMT182: Smart HART®.
The TMT182 output consists of 4…20 mA and HART®
superimposed signals.
Omnigrad S -TC63
Ø33
2
Ø 6.5
6
5
Ø 4.5
Ø44
3
4
22.5
Ø44
Ø33
TMT184: PROFIBUS-PA®.
For the TMT184, with PROFIBUS-PA® output signal,
the communication address may be set via software or via
mechanical dip-switch.
Ø33
+
2
1
6
-
Ø 6.5
8
+
-
5
Ø 4.5
Ø44
3
4
26.8
Ø44
Ø33
ThermowellThe thermowell is a component of the TC63 that must tolerate most of the mechanical stress transmitted by
the process.
It is made from pipe and supplied in different materials and dimensions, according the chemical/physical characteristics of the process: corrosion, temperature, pressure and speed of the fluid.
The thermowell consists of three parts:
½"NPT-F
•the extension neck (indicated as E), represents the
external part of the thermowell and is connected
½"NPT-M
E
E
Compression
Fitting
E
Neck
Process
Connection
with the head of the probe by means of a neck (usually a nipple)
•the immersed part (identified as L), is situated next
to the process connection in direct contact with the
fluid process.
•The welded threaded or flanged and the sliding
complession fitting, are the process connection that
represents the part inserted between the extension
L
L
L
ØD2
Wetted
Part
and the immersed part and guarantees the mechanical and hydraulic sealing of the thermometer and
plant.
The external finishing of the thermowell stem is
available with a standard value of Ra < 1.6 μm (different finishes are available on request).
Process Connection
ØD1
Process Connection
ØD1
R
Process Connection
ØD1
Fig. 5: Thermowell with threaded or flanged process connection
Warning:
#
The total standard length (A) of the thermowell must never exceed 3000 mm (that represents the standard
length of pipe-bars; higher lengths are available only on request).
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Omnigrad S -TC63
Process connection The standard process connections are threaded or flanged. When the process connection is threaded the mate-
rial of connection is the same at the thermowell instead, when the process connection is flanged the material
can be different: SS 316/1.4401or ASTM A105/St 52.3 U standard material.
When it is necessary to have a flange in special material, more resistant at the corrosion
(example Hastelloy ®C276), it is cheaper to choose an economic version composed by a flange in
SS316/1.4401 with on wetted part a platted in Hastelloy® C276/2.4819 (this solution is very less expensive).
On request, it is possible to select also different materials, finishings and connections.
Probe In the TC63 the measuring probe are two:
• the TPC100 (for general purpose application)
• the TPC300 (ATEX certificated application)
Both of the probe are made in mineral insulated cable (MgO), with sheath in AISI316/1.4401.
The Immersion length (U) of the sensor can be chosen within a standard range from 50 to 3000 mm (see
"Warning" in the "thermowell" section).
The sensors with a Immersion length (U) > 3000 mm can be supplied after a technical verification of the specific applications from our technical office in the E+H Customer Service Department.
For replacement of the insert, it is necessary to refer the following table to have the IL (applicable only to standard thickness well bottoms). The immersion length of the insert spare part (IL) is calculated adding the total
length of the thermowell (A = L + E) and the length of neck (N) used.
Insert general purposeØ, ..mmN , tp.N, mm N, materialN, threadIL, (mm)
TPC100 6N69A105/SS316 1/2"NPT M IL = L+E + 69 + 41
TPC100 6N109A105/SS316 1/2"NPT M IL = L+E + 109 + 41
TPC100 6NU96A105/SS316 1/2"NPT FIL = L+E + 96 + 41
TPC100 6NUN148A105/SS316 1/2"NPT M IL = L+E + 148 + 41
D1
A1
SLIDING
A
Compression
Fitting Process
Insert ATEX certifiedØ, ..mmN , tp.N, mm N, material N, threadIL, (mm)
TPC3006 N69A105/SS316 1/2"NPT M IL = L+E + 69 + 41
TPC3006 N109A105/SS316 1/2"NPT M IL = L+E+ 109 + 41
TPC300 6 NU96A105/SS316 1/2"NPT FIL = L+E + 96 + 41
TPC3006NUN148A105/SS316 1/2"NPT M IL = L+E + 148 + 41
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Omnigrad S -TC63
+
-
+
-
+
-
-
+
-
ELECTRICAL DIAGRAM ON TERMINAL BLOCK
2xTC
2°TC1°TC
2 wires
41
N
C
E
L
A
E
L
ØD2
1xTC
1°TC
2 wires
E
M4x1
...WITH
TERMINAL
BLOCK
1°TC
Ø8
Ø42
Ø33
40
M4x1
TPC300
ATEX
Certified
TPC100
General
Purpose
or
... WITH
TRANSMITTER
+
1
6
5
4
Ø44
Ø33
40
Ø8
-
2
mA
3
Ø42
Ø33
75
L
R
ØD1
ØD1
ØD1
Ø6
Ø6Ø6
Fig. 6: Functional components, standard electrical diagrams (ceramic terminal block)
Certificates & approvals
Ex approval • ATEX Certificate CESI 05ATEX038 for explosion proof type of protection: ATEX II 2 GD EEx-d IIC T6..T5
T85°...T100°C. ATEX II 1/2 GD EEx-d IIC T6..T5 T85°...T100°C. The TC63 is 4 marked.
With regards to the NAMUR NE 24 certificate and the Manufacturer’s Declaration according to the standard
EN 50018, EN 50020, EN 50281-1-1, EN 50281-1-2, E+H Customer Service will be able to provide further
detailed information.
PED approvalThe Pressure Equipment Directive (97/23/CE) is respected. As paragraph 2.1 of article 1 is not applicable to
these types of instruments. The 4 mark according to PED Directive is not requested.
Material certification The material certificate EN 10204 3.1 can be directly selected from the sale structure of the product and refers
to the parts of the sensor in contact with the process fluid.
Other types of certificates related to materials can be requested separately.
The “short form” certificate includes a semplified declaration with no enclosures of documents related to the
materials used in the construction of the single sensor and guarantees the traceability of the materials through
the identification number of the thermometer.
The data related to the origin of the materials can subsequently be requested by the client if necessary.
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Omnigrad S -TC63
Test on thermowell The pressure tests are carried out at ambient temperature in order to verify the resistance of the thermowell to
the specifications indicated by the norm DIN 43772.
With regards to the thermowells that do not comply with this norm (with a reduced tip, a tapered tip, special
dimensions, etc.) , the pressure of the corresponding straight tube with similar dimensions is verified. The sensors certified for use in Ex Zones, are always tested to pressure according to the same criterions.
Further details
Maintenance The Omnigrad S TC63 thermometers do not require any specific maintenance.
In the case of ATEX certified components (transmitter, insert or thermowell) please refer to the corresponding
specific relevant documentation (at the end of the document).
Ordering information
Sales structure
TC63-Omnigrad S TC63. ATEX EEx d thermometer certified
Thermocouple thermometer complete of pipe thermowell
Gounded or ungrounded replaceable mineral inset.
Terminal head connection with epoxy coating, IP66-IP68
Two operating and measurement ranges: from -40 to 750°C (with TC J); -40 to 1200°C (with TC K)
Brochure Field of activities - Temperature measurementFA006T/09/en
Temperature head transmitter iTEMP® PCP TMT181 TI070R/09/en
Temperature head transmitter iTEMP® HART® TMT182 TI078R/09/en
Temperature head transmitter iTEMP® PA TMT184 TI079R/09/en
TC insert for temperature sensors - Omniset TPC 100TI278T/02/en
TC insert for temperature sensors - Omniset TPC 300 (to be released)TI291T/02/en
Safety instructions for use in hazardous areas (TPC300, to be released) XA017T/02/en
TC thermometers Omnigrad TSC - General informationTI090T/02/en
Industrial thermometers, RTD and Thermocouples TI236T/02/en
International Head Quarter
Endress+Hauser
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79576 Weil am Rhein