Endress+Hauser S TR63 Specifications

Technical Information

71105549

Omnigrad S -TR63

RTD thermometer EEx-d or EEx-ia certified, replaceable insert, thermowell from pipe, process connection threaded, flanged or sliding. PCP (4...20 mA), HART® or PROFIBUS-PA® electronics

Range of uses

The Omnigrad S TR63 is an RTD industrial thermometer with a inset (Pt100) and threaded or flanged 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

TI282T/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

• Mineral oxide replaceable insulated insert (MgO), diameter 3 or 6 mm

• PCP, HART® and PROFIBUS-PA®, (4...20 mA 2-wire transmitters)

• The accuracy of the sensing element (Pt100) is: class A or 1/3 DIN B (IEC 60751) with electrichal connection to 2, 3 or 4 wires

• The sensing elements (Pt100) are available in wire-wound WW (range:-200...600°C) or thin-film TF (range:-50...400°C) with single or double Pt100 execution

• ATEX II 1 GD EEx-ia IIC certification

• ATEX II 1/2 GD EEx-ia IIC certification

• ATEX II 1/2 GD EEx-d IIC certification

• ATEX II 2 GD EEx-d IIC certification

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Omnigrad S -TR63

Function and system design

Measuring principle The RTD (Resistance Temperature Detector), is a sensor where the electrical resistance varies with the tem

perature. The material of the RTD is Platinum (Pt) with a value of the resistance (R), referred to a nominal value at the temperature of 0°C = 100,00 Ω (in compliance to rule IEC 60751; it is called Pt100). The very important is to define the RTD; it is defined with a standard "α" value measured between 0°C and 100°C.

This value is: α = 3.85 x 10 The temperature is measured indirectly by reading the voltage drop across the sensing resistor in the presence of a constant current flowing through it using Ohm’s. The measuring current should be as small as possible to minimise possible sensor selfheating; normally this current is around 1mA, no higher. The resistance value measured for each degree is about = 0,391 Ohm/K; over 0°C it is opposite proportional at the temperature. The standard RTD connection at the plant instrument can be to 2, 3 or 4 wires to simple or double RTD element.

Equipment architecture The construction of the TR63 temperature sensor is based on the following standards:

• EN 50014/18 (housing)

• Neck (1 or 2 nipple and 1 "3 union", standard or EEx- execution)

• IEC 60751 (insert and sensing element).

• Pipe thermowells standard like: ENI, MONTEDISON, ENEL, ecc.

-3

°C-1.

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 extension between the head and the thermowell. The insert diameter is 3 - 6 mm, is composed by MgO cable (SS 316L sheath) with a sensing element (Pt100 ohm/0°C) positioned at the MgO cable tip. The standard electrical connection is to 2, 3 or 4 wires for sensing element (Pt100). The thermowell is from bar stock, with execution, on wetted part, conical, straight or tapered. The process connection on the thermowell is: threaded or flanged, in some case it can be to weld also.

Material & Weight

Operating conditions

Fig. 1: TR 66 with the various types of process connections and end parts of the probe

Housing Insert Neck Thermowell Weight

aluminium epoxy coated sheath in SS

316L/1.4404

nipple and 3 union: SS 316/1.4401, A105

thermowells: SS 316/1.4401, SS 446/1.4749 Inconel 600

From 1.5 to 5.0 kg for standard options

Performance

Operating condition or test Product type or rules Value or data of test

Ambient temperature housing (without head-mounted transmitter -40÷130°C

housing (with head-mounted transmitter) -40÷85°C Process temperature Same of measurement range (see below). Maximum flow velocity The maximum flow rate tolerated by the thermowell decreases as the immersion length

increases (U). The methods used to verify the resistance of thermowells with pressure,

temperature and flow rate data can also be compliant with those indicated in standard

ASME/ANSI PTC 19.3.

For assistance on resistance tests, please contact the E+H Customer Service Depart-

ment. Shock and vibration resistance

test

Fig. 2: Operating conditions

RTD Inset in according to the rule

IEC 60751:

Acceleration 3 g of peak Frequency from 10Hz to 500Hz and back Time of the test 10 hours

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Omnigrad S -TR63

Accuracy

RTD maximum error type TF - Range: -50 to 400°C

Cl. A 3σ = 0.15+0.0020It|

3σ = 0.30+0.0050ItI

Cl. 1/3 DIN B 3σ = 0.10+0.0017It|

3σ = 0.15+0.0020ItI 3σ = 0.15+0.0020ItI 3σ = 0.30+0.0050ItI

= -50…250°C = +250…400°C

= 0…100°C = -50...0 = 100...250°C = 250…400°C

DIN-IEC-EN 60751

2,0

Class B (°C)

1,5

1,0

Class A (°C)

Tolerance

0,5

-200 -100 0 100 200 300 400 500 600°C

Class 1/3 DIN B (°C)

±3σ = range including 99.7% of the readings. (|t|= absolute value of the temperature in °C).

RTD maximum error type WW - Range: -200 to 600°C

Cl. A 3σ = 0.15+0.0020It| = -200…600°C

Cl. 1/3 DIN B 3σ = 0.10+0.0017It|

3σ = 0.15+0.0020ItI 3σ = 0.15+0.0020ItI

= -50...250°C = -200...-50 = 250…600°C

-200 -100 0 100 200 300 400 500 600°C

2,0

1,5

1,0

Tolerance

0,5

DIN-IEC-EN 60751

Class A(°C)

Class 1/3 DINB(°C)

±3σ = range including 99.7% of the readings. (|t|= absolute value of the temperature in °C).

Others errors

Transmitter maximum error See the corresponding documentation (codes at the end of the document)

Display maximum error 0.1% FSR + 1 digit (FSR = Full Scale Range)

The “4 wires” configuration, is provided as a standard connection for the single Pt 100’s excludes additional errors in every condition. Generally in the “4 wires” configuration there is a higher guarantee of accurancy.

Response time Tests, with the RTD insert, in water at 0.4 m/s (according to IEC 60751); from 23 to 33°C:

Insulation

Stem diameter of the insert Sensing element type Time for 50% or 90% of

temperature step

6 mm TF / WW t

3 mm TF / WW t

Measurement Insulation type Result

Insulation resistance between terminals and probe sheath above 100 MΩ at 25°C According to IEC 60751, test voltage 250 V above 10 MΩ at 300°C

Response time

3.5 s

8.0 s

2.0 s

5.0 s

Self heating Negligible when the E+H iTEMP® transmitters are employed.

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Omnigrad S -TR63

Installation

The TR63 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. 3A3C). 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. 3B-3D).

≈

L> D/2+h

Fig. 3: Installation examples

METALLICSHEATH

ØD

welded coupling

THERMAL INSULATING

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. 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. In the case of vibrations the thin film sensing element Pt100 (TF) may offer advantages; the wire wound Pt100 (WW), besides having a larger measurement and accuracy range, guarantees greater long term stability.

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