Technical InformationTI 246T/02/en60018848

RTD Temperature Sensoromnigrad M TR 46

Hygienic in-line thermometerPCP (4...20 mA), HART® or Profibus-PA® electronics

TR 46 is a temperature sensor especiallydesigned for hygienic applications(mainly in the pharmaceutical field) toavoid any intrusivity of the measurementprobe into the process duct.It consists of a pipe segment, which canbe inserted in the pipeline through theside connections (clamps or threads),and a housing, which may contain thetransmitter for the conversion of themeasured variable.The sensing element is applied on to theouter wall of the tube. The thermometer is designed to providea measurement as close as possible tothe temperature of the process fluid.

74-01

Features and Benefits• 3-A® certification• SS 316L/1.4435 for "wetted" parts (BN 2

compliance on request)• Threaded or clamped process connec-

tions as standard; other on request• Surface finishing down to Ra < 0.4 µm,

with or without electropolishing• Stainless steel, aluminum or plastic

housing, all of them easily cleanable and IP65 at minimum (IP68 available)

• PCP (4...20 mA, with enhanced accu-racy), Hart® and Profibus-PA® 2-wire transmitters

• Pt 100 sensing elements with class A accuracy (DIN EN 60751)

• Double Pt 100 as standard, for redun-dancy or validation purposes

• Material certification (3.1.B, ...)• Ferrite content determination• EA calibration certificate• Ferrite content determination• Sensor matching calibration

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Areas of application

• Food industry: milk, beer, fruit juice, syrup, chocolate, oils/fats.• Biotechnology industry: fermenters.• Pharmaceutical industry: fluids, acids, purified water.• Fine chemicals industry: cosmetics.

Function and system design

Measuring principle In RTD (Resistance Temperature Detector) thermometers the sensing element consists of an elec-trical resistance with value of 100 Ω at 0°C (called Pt 100, in compliance with standard DIN EN60751), which increases at higher temperatures according to a coefficient characteristic of theresistor material (Platinum).

Overall design TR 46 is an in-line sensor, which can be inserted in thepipeline through the side connections. In the housing (head) a transmitter may be contained orthe terminals for the electrical connection.The sensing element is glued on to the outer wall of thetube. The construction, executed according to 3-A® andEHEDG design criteria, allows the sensor to withstandthe stresses caused by CIP (Cleaning In Place) and SIP(Sterilization In Place) processes. The internal shape of the duct is without any change indiameter and no weldings are in contact with the proc-ess medium.The electrical structure complies with the rules of DIN EN60751 standard.The housing can be of different types and materials(plastic, painted aluminium, stainless steel). Its fitting tothe rest of the probe and the gland for the cable entry,assure an IP (Ingress Protection) grade of 65 at mini-mum.

Material Wetted parts in SS 316L/1.4435.

Weight From 0.5 to 2.5 kg for standard options.

Electronics

The wanted type of output signal can be obtained by choosing the right head-mounted transmit-ter. Endress + Hauser provides state-of-the-art transmitters (iTemp® series) built in 2-wire technol-ogy and with 4…20 mA, HART® or Profibus-PA® output signal. All the transmitters are easily programmable with a personal computer, by means of the publicdomain software ReadWin 2000 (for 4…20 mA and HART® transmitters) or the software Commu-win II (Profibus-PA® transmitters).A PCP (4…20 mA) model (TMT 180) is available with enhanced accuracy, particularly advisablefor hygienic applications.

Ed

PL

Figure 1. TR 46.

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The HART® transmitters can be programmed also by means of the handheld operating moduleDXR 275 (Universal HART® Communicator).In the case of Profibus-PA® transmitters, E+H suggests the use of Profibus® dedicated connec-tors: the Weidmüller type (Pg 13.5 M12) is provided as standard option.In the case of Profibus-PA® transmitters, E+H suggests the use of Profibus dedicated connectors:the Weidmüller type (Pg 13.5 M12) is provided as standard option.For detailed information about transmitters, please refer to the specific concerned documentation(see TI codes at the end of this document).If a head-mounted transmitter is not employed, the sensor probe can be connected through theterminal block to a remote converter (i.e. DIN rail transmitter).For detailed information about transmitters, please refer to the specific concerned documentation(see TI codes at the end of this document).If a head-mounted transmitter is not employed, the sensor probe can be connected through theterminal block to a remote converter (i.e. DIN rail transmitter).

Performances

Operating conditions Ambient temperature (housing without head-mounted transmitter)• metal housings -40÷130°C• plastic housings -40÷85°C

Ambient temperature (housing with head-mounted transmitter) -40÷85°CAmbient temperature (housing with display) -20÷70°C

Process temperatureThe measurement range (see below) can be limited by the gasket employed in the process con-nection.

Max process pressure• DN25/40 threaded connections 4 MPa (40 bar) up to 140°C• DN50 threaded connections 2.5 MPa (25 bar) up to 140°C

With clamped connections the maximum operating pressure depends heavily from the employedtype of gaskets and clamps.

Max flow velocityNo limitations.

Accuracy Sensing element max error (cl. A)3σ = 0.15+0.0020ItI

(ItI=absolute value of temperature in °C)

Transmitter max errorSee specific documentation (codes at the end of thisdocument).

Display max error 0.1% FSR + 1 digit

Measurement range -40…200°C

Response time The response time of the instrument depends strongly on the heat transfer coefficient between theprocess fluid and the pipe wall: for instance, the higher is the flow velocity, the faster is theresponse time. Up to now no standards have been defined for this kind of instruments.

-40°C

200°C

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Insulation Insulation resistance between terminals and pipe more than 100 MΩ at 25°C(according to DIN EN 60751, test voltage 250 V) more than 10 MΩ at 200°C

MTBF It is heavily influenced by the operating conditions (high pressure, vibrations, shocks, thermalshocks, corrosion, …) of the sensors.For a normal use, a calculation made according to MIL-HDBK-217F, gives as result a value higherthan 100 years in the case without built-in electronics, and more than 20 years with a head-mounted transmitter (35 years with TMT 181).

Self heating Completely negligible when E+H transmitters are employed.

Installation

The pipe segment which constitutes the TR 46 must be inserted in the pipeline through the sideconnections.The counterparts for the pipe connections and the respective gaskets or sealing rings, are gen-erally not supplied with the sensors, and are on the customer's responsibility (3-A® requirementsmust be fulfilled). The only exception is the threaded connection DIN 11851, for which the gasketis provided; its material is in compliance with CFR Title 21, § 177.2600 (FDA). For clamp connections, the right gasket and clamping ring have to be chosen by the user withreference to the operating conditions of temperature and pressure.In case of Atex certified components (transmitter), please refer to the specific documentation (seethe code at the end of this document).As in all such kind of instruments, due to the unavoidable heat transfer between the pipe wall anthe external environment, the detected value might have a difference with the temperature of theprocess fluid. That deviation decreases if the difference between the process and the room tem-perature is low, and if the convection coefficient consequent to the internal flow is high.Attention should be paid in the choice of the measurement point in case of two-phase flows, whichmay cause fluctuations or errors in the temperature value.Concerning corrosion, the basic material of the wetted parts (SS 316L/1.4435) is capable to tol-erate common corrosive media up to high temperatures. The gaskets supplied with threaded pipeconnections, besides CIP and SIP-proof, resist to a wide variety of aggressive substances. Forparticular applications, please ask to the E+H service.In case of disassembling of the sensors, new gaskets equal to the originals and specific torquesmust be employed for the re-assembling procedure, to assure the stated IP (Ingress Protection)grade of the enclosure.When the ambient has a high humidity rate and the process is at low temperature, a plastic hous-ing can be an effective choice (i.e. model TA20B) to avoid problems due to condensation.

Figure 2. TR 46 with clamp pipe connections (left) or with threaded (DIN 11851 or DIN 11864-1-A) connections (right).

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System components

Housing The housing which contains the electric terminals or the transmitter, can be of different types andmaterials (plastic, painted aluminium, stainless steel). Its fitting to the rest of the probe and the gland for the cable entry, assure an IP grade of 65 atminimum (see also figure 3). All the supplied heads have internal geometry according to DIN 43729 standard (form B), andthermometer connection M24x1.5. Head type TA20A is the basic E+H aluminium housing for Temperature sensors, provided in theE+H corporate colours, without supplementary charges in the version IP66/IP67. Head TA20B is a polyamide housing, black or white, sometimes defined with the code BBK in theTemperature market. In TA21E a screw cap is employed, joined to the head body by a chain. Head type TA20D (aluminium), called also BUZH, is able to contain a terminal block and a trans-mitter at the same time, or two transmitters. Head TA20J is the stainless steel housing with E+H corporate design, and can be provided alsowith a LCD display (4 digits), operating with 4…20 mA transmitters. TA20R is the head suggested by E+H Temperature division for hygienic applications, due to itsmaterial (stainless steel) and its "clean" design. TA20W (BUS type) is an aluminium round-shaped grey head, with a clip for the cap closure.

Figure 3. Housings.

Head transmitter The available head-mounted transmitters are (see also the section "Electronics"):• TMT 180 PCP 4…20 mA • TMT 181 PCP 4…20 mA• TMT 182 Smart HART®

• TMT 184 Profibus-PA®

TMT 180 and TMT 181 are PC Programmable transmitters. TMT 180 can be supplied in a versionwith a better accuracy (0.1°C vs. 0.2°C) in the bandwidth -50…250°C; a model with a fixedmeasurement range (defined by the user in the order phase) is available too.TMT 182 output consists of 4…20 mA and HART® superposed signals.For TMT 184, with Profibus-PA® output signal, the communication address can be set via softwareor by means of a mechanical dip-switch: the user may ask for the desired configuration in theorder phase.

Husing Type IP66 IP67 Husing Type IP66 IP67

TA20A

YES YES

TA20J

YES YES

TA21E

/ / YES

TA20R

YES YES

TA20D

YES / /

TA20W

YES / /

80

110

98

108

80 80

95

79

Ø55Ø55

113

140

85

140

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Figure 4. TMT 181.

Extension neck The extension neck (part between the process connection and the housing), built from stainlesssteel, is constituted by a tube with standard diameter of 9 mm and length 65 mm.

Pipe The side connections can be chosen among the types:• ISO 2852 clamp• Tri-Clamp®

• DIN 11851• DIN 11864-1-A

Figure 5. ISO 2852 clamp or Tri-Clamp® pipe connections (left), DIN 11851 connections (middle), DIN 11864-1-A connections (right).

Other (e.g. Neumo, ...) are available on request.The threaded connections DIN 11851 are supplied with the sealing gaskets mounted on, whosematerial (silicone) is in compliance with FDA CFR Title 21, § 177.2600 (max temperature 230°C).The standard length of the pipe segment which constitutes the sensor is 100 mm; a different (spe-cial) length can be requested by means of the "9" digit in the order code.In the following table the internal dimensions of the pipes are listed:

On request the starting material for the wetted parts can be supplied in compliance with BaslerNorm 2 (BN2), which imposes a limited ferrite content, in order to obtain an improved corrosionresistance.The surface roughness (Ra) of the wetted parts is supplied down to 0.4 µm. A roughness below0.4÷0.5 µm is not demonstrated to have advantages for hygienic purposes.Electropolishing consists in an electrolytic treatment of the metal surface, which leads to a clean-ing, levelling and passivation of it.

I.D. (mm)

DN ISO 2852 Tri-Clamp® DIN 11851 DIN 11864-1-A

25 (1") 25 22.3 26 26

40 (1 1/2") 40 35 38 38

50 (2") 51 47.8 50 50

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Probe The thermometer has two Pt 100 (cl.A) sensors close each other; one canbe connected to the transmitter or tothe terminal block, the other can beused for redundancy, to get a secondsignal or for validation purposes.The sensing elements are glued on tothe external surface of the pipe, andprotected by a cylindrical metal cas-ing.The standard wiring diagram is 3-wires.

Figure 6. Standard wiring (3-wires).

Certifications

Certifications from exter-nal bodies

3-A® Authorization no. 1144 for the declaration of compliance with standard 74-01.

Manufacturer’s certifica-tions

The 3.1.B material certificate, according to standard EN 10204, is selectable directly from the salestructure of the product. Other kinds of material certifications can be requested separately. The "standard" one is a simplified and cost effective version of the certificate, in which the docu-mentation about the origin of the employed materials refers to each sensor. The "labelled" versionhas in addition a specific marking relating to the wetted parts of the sensor, and assures the place-ment in the archives of the relevant data by means of the serial number of the thermometer. Concerning tests and calibration, the "inspection test report" consists in a declaration of conform-ity to the essential points of standard DIN EN 60751.Due to the chracteristics of the sensor, a calibration procedure can be carried out only after a pre-vious agreement with the customer.

Maintenance Omnigrad M thermometers don’t need a specific maintenance. For the models supplied withprocess connections including seals, the integrity of the sealing ring should be checked regularlyand it must be substituted when necessary. In case of ATEX certified components (transmitter, insert), please refer to the specific documen-tation (see the code at the end of this document).

Delivery time For small quantities (about 10 units) and standard options, from 5 to 20 days depending on therequested configuration.

Accessories

1xPt100

3 wires

RedRed

WhiteWhite

Red

Red

White

Set of gaskets (no. 6) for DIN 11851 pipe connectionseal: silicone o-ring complying with FDA CFR Title 21, § 177.2600

max temperature: 230°Cmat. nr.: 60018905 (DN25)mat. nr.: 60018906 (DN40mat. nr.: 60018907 (DN50)

Set of gaskets (no. 6 o-rings) for DIN 11864-1-A pipe connectionseal: silicone o-ring complying with FDA CFR Title 21, § 177.2600

max temperature: 230°Cmat. nr.: 60018908 (DN25)mat. nr.: 60018909 (DN40)mat. nr.: 60018910 (DN50)

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Ordering information

TR46 - RTD temperature sensor

Process connections and pipe nominal diameterRB ISO2852 clamp, pipe DN25RG ISO2852 clamp, pipe DN40RL ISO2852 clamp, pipe DN50SB Tri-Clamp® , pipe 1"

SG Tri-Clamp® , pipe 1 1/2"

SL Tri-Clamp® , pipe 2"

PB Dairy connection DIN11851, pipe DN25PH Dairy connection DIN11851, pipe DN40PL Dairy connection DIN11851, pipe DN50QB Aseptic connection DIN11864-1-A, pipe DN25QH Aseptic connection DIN11864-1-A, pipe DN40QL Aseptic connection DIN11864-1-A, pipe DN50YY Special version

Pipe length PL1 100 mm pipe length PL9 .......mm pipe length PL to specify

Neck dimensions: E (65-145 mm) and dA 65 mm neck length E, 9mm diameter dX ..... mm neck length Eto specify, 9mm diameter dY ..... mm special neck length E and diameter d

Material and finishing of wetted parts1 SS 316L/1.4435, Ra<=0.8 µm2 SS 316L/1.4435, Ra<=0.6 µm3 SS 316L/1.4435, Ra<=0.4 µm,4 SS 316L/1.4435, Ra<=0.4 µm, electropolishing9 Special version

Terminal type2 Flying leads3 Ceramic terminal block4 HR fiber terminal block

RTD type and wiring diagramL 2 Pt100 class A, 3-wireY Special version

Housing material, cable entry, IP gradeA TA20A Alu., M20x1.5 conduit IP66/IP673 TA20A Alu., Pg16, IP66/IP684 TA20A Aluminium, Profibus® connector, IP66

B TA20B Polyamide white, Pg16, IP65C TA20B Polyamide black, Pg16, IP65E TA20E Aluminium, screw cap., M20x1.5 IP67D TA20D Aluminium, high lid, Pg16, IP665 TA20D Aluminium, high lid, Profibus® connector IP66

J TA20J SS316L, M20x1.5, IP66/IP67K TA20J SS316L, M20x1.5, + display IP66/IP67M TA20J SS316L, Profibus® connector IP66/IP67

R TA20R SS316L, screw cap , M20x1.5, IP66/IP67S TA20R SS316L, screw cap , Profibus® connector IP66/IP67

W TA20W Aluminium, round lid, clip, Pg16 IP66Y Special version

Built-in head transmitterSee the subsequent table

Certificates0 Certificates not requiredB 3.1.B EN10204, standard for wetted partsG 3.1.B EN10204, labelled for wetted partsD 3.1.B EN10204, standard + roughnessH 3.1.B EN10204, labelled + roughness

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Tests and calibration 0 Tests and calibration not required1 Inspection test report (TZC135-A), sensor2 Inspection test report (TZC135-D), loop

Additional options0 Additional options not required

TR46- Complete order code

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Built-in head transmitter0 Without built-in transmitter

1 Built-in trasm.THT1, separate position

2 Fixed range TMT180-A21, from...to...°C - accuracy 0.2K, span limit: -200...650°C

3 Fixed range TMT180-A22, from...to...°C - accuracy 0.1K, span limit: -50...250°C

4 Programmable TMT180-A11, from...to...°C - accuracy 0.2K, span limit: -200...650°C

5 Programmable TMT180-A12, from...to...°C - accuracy 0.1K, span limit: -50...250°C

P PCP transmitter 2wire TMT181-A - isolated, adjusted from ... to ... °C

Q PCP ATEX transmitter 2wire TMT181-B - isolated, adjusted from ... to ... °C

R HART® transmitter 2wire TMT182-A - isolated, adjusted from ... to ... °C

S Profibus-PA® transmitter, 2wire, TMT184-A

T HART® ATEX transm. 2wire TMT182-B isolated, adjusted ... to ... °C

V Profibus-PA® ATEX transm. 2wire TMT184-B

9 Special version

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Supplementary documentation

RTD thermometers Omnigrad TST - General information TI 088T/02/en Terminal housings - Omnigrad TA 20 TI 072T/02/en Temperature head transmitter iTEMP® Pt TMT 180 TI 088R/09/en Temperature head transmitter iTEMP® PCP TMT 181 TI 070R/09/en Temperature head transmitter iTEMP® HART® TMT 182 TI 078R/09/en Temperature head transmitter iTEMP® PA TMT 184 TI 079R/09/en

Endress+HauserGmbh+Co.Instruments InternationalP.O. Box 2222D-79574 Weil am RheinGermany

Tel. (07621) 975-02Tx 773926Fax (07621) 975 345http://www.endress.cominfo@ii.endress.com

Subject to modification

TI 246T/02/en/12.0160018848FM+SGML 6