WIKA TR21-A User manual

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DE
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Additional information
Zusatzinformation
Informations complémentaires
Información adicional
Model TR21-A Model TR21-B Model TR21-C
Additional information for hazardous areas (Ex i)
Model TR21
Zusatzinformation für explosionsgefährdete Bereiche (Ex i)
Typ TR21
Informations complémentaires concernant les zones dangereuses
(Ex i), type TR21
Información adicional para zonas potencialmente explosivas (Ex i)
Modelo TR21
70018194BVS 14 ATEX E 147 X
IECEx BVS 14.0101X

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Additional information model TR21 (Ex i) Page
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© 09/2016 WIKA Alexander Wiegand SE & Co. KG
All rights reserved. / Alle Rechte vorbehalten.
WIKA®is a registered trademark in various countries.
WIKA®ist eine geschützte Marke in verschiedenen Ländern.
Prior to starting any work, read the operating instructions and additional information!
Keep for later use!
Vor Beginn aller Arbeiten Betriebsanleitung und Zusatzinformation lesen!
Zum späteren Gebrauch aufbewahren!
Lire le mode d‘emploi et informations supplémentaires avant de commencer toute opération !
A conserver pour une utilisation ultérieure !
¡Leer el manual de instrucciones y información adicional antes de comenzar cualquier trabajo!
¡Guardar el manual para una eventual consulta!

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WIKA additional information model TR21 (Ex i) 3
Contents
Declarations of conformity can be found online at www.wika.com.
Contents
1. Ex marking 4
2. Safety 7
3. Commissioning, operation 9
4. Special conditions for safe use (X conditions) 14
5. Calculation examples for self-heating at the thermowell tip 15
6. Accessories 15
Appendix 1: CSA control drawing 16
Appendix 2: EU declaration of conformity 18
Appendix 3: EPL Matrix 19

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WIKA additional information model TR21 (Ex i)4
1. Ex marking
DANGER!
Danger to life due to loss of explosion protection
Non-observance of these instructions and their contents may result in the
loss of explosion protection.
▶
Observe the safety instructions in this chapter and further explosion
instructions in these operating instructions.
▶
Follow the requirements of the ATEX directive.
▶
Observe the information given in the applicable type examination
certificate and the relevant regulations for installation and use in
hazardous areas (e.g. IEC 60079-11, IEC 60079-10 and IEC 60079-14).
Check whether the classification is suitable for the application. Observe the relevant
national regulations.
ATEX
IECEx
II 1G Ex ia IIC T1 ...T6 Ga
II 1/2G Ex ia IIC T1 ...T6 Ga/Gb
II 2G Ex ia IIC T1 ...T6 Gb
II 1D Ex ia IIIC T135 °C Da
II 1/2D Ex ia IIIC T135 °C Da/Db
II 2D Ex ia IIIC T135 °C Db
Supplementary documentation:
▶
This additional information for hazardous areas applies in conjunction with the operating
instructions “Miniature resistance thermometers for sanitary applications, model TR21”
(article number 14006814).
1. Ex marking

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WIKA additional information model TR21 (Ex i) 5
For applications without transmitters (models TR21-x-xPx and TR21-x-xRx) that require
group II instruments (potentially explosive gas atmospheres), the following temperature
class classification and ambient temperature ranges apply:
Table 1
Marking Temperature
class
Ambient
temperature
range (Ta)
Max. surface temperature
(Tmax) at the sensor or
thermowell tip
ATEX IECEx
II 1G Ex ia IIC T1 ... T6 Ga
II 1/2G Ex ia IIC T1 ... T6 Ga/Gb
II 2G Ex ia IIC T1 ... T6 Gb
T1 ...T5 -50 ... +85 °C TM(medium temperature) +
self-heating
For this, the special conditions
must be observed (see chapter
4 “Special conditions for safe
use (X conditions)”).
T6 -50 ... +80 °C
For applications requiring instruments of equipment group II (potentially explosive dust
atmospheres), the following surface temperatures and ambient temperature ranges apply:
Table 2
Marking Power PiAmbient
temperature
range (Ta)
Max. surface temperature
(Tmax) at the sensor or
thermowell tip
ATEX IECEx
II 1D Ex ia IIIC T135 °C Da
II 1/2D Ex ia IIIC T135 °C Da/Db
II 2D Ex ia IIIC T135 °C Db
750 mW -50 ... +40 °C TM(medium temperature) +
self-heating
For this, the special conditions
must be observed (see chapter
4 “Special conditions for safe
use (X conditions)”).
650 mW -50 ... +70 °C
550 mW -50 ... +85 °C
1. Ex marking

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WIKA additional information model TR21 (Ex i)6
For applications with transmitters (TR21-x-xTT, TR21-x-xTB) that require group II
instruments (potentially explosive gas atmospheres), the following temperature class
classification and ambient temperature ranges apply:
Table 3
Hazardous gas atmosphere Temperature
class
Ambient
temperature
range (Ta)
Max. surface temperature
(Tmax) at the sensor or
thermowell tip
ATEX IECEx
II 1G Ex ia IIC T1 ... T6 Ga
II 1/2G Ex ia IIC T1 ... T6
Ga/Gb
II 2G Ex ia IIC T1 ... T6 Gb
T1 ...T4 -40 ... +85 °C TM(medium temperature) +
self-heating
For this, the special conditions
must be observed (see chapter
4 “Special conditions for safe
use (X conditions)”).
T5 -40 ... +60 °C
T6 -40 ... +45 °C
For applications requiring instruments of equipment group II (potentially explosive dust
atmospheres), the following surface temperatures and ambient temperature ranges apply:
Table 4
Hazardous dust atmosphere Power PiAmbient
temperature
range (Ta)
Max. surface temperature
(Tmax) at the sensor or
thermowell tip
ATEX IECEx
II 1D Ex ia IIIC T135 °C Da
II 1/2D Ex ia IIIC T135 °C Da/Db
II 2D Ex ia IIIC T135 °C Db
750 mW -40 ... +40 °C TM(medium temperature) +
self-heating
For this, the special conditions
must be observed (see chapter
4 “Special conditions for safe
use (X conditions)”).
650 mW -40 ... +70 °C
550 mW -40 ... +85 °C
For applications that require EPL Gb or Db, the instruments designated as “ia” can also be
used in type “ib” measuring circuits, with the same connection parameters.
Thus the entire measuring circuit (including the sensor circuit) is an “ib” circuit. Instruments
that have been operated in a power supply circuit of type “ib” cannot be re-used in a power
supply circuit of type “ia”.
1. Ex marking

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WIKA additional information model TR21 (Ex i) 7
2. Safety
2.1 Explanation of symbols
DANGER!
... indicates a potentially dangerous situation in the hazardous area that can
result in serious injury or death, if not avoided.
2.2 Intended use
The thermometers described here are suitable for temperature measurement in hazardous
areas.
The non-observance of the instructions for use in hazardous areas can lead to the loss
of the explosion protection. Adhere to the limit values and instructions (see chapter 3.4
“Electrical connection values”).
Neither repairs nor structural modifications are permitted, and any would void the
guarantee and the certification.
Substitution of components may impair intrinsic safety.
2.3 Responsibility of the operator
The responsibility for classification of zones lies with the plant operator and not the
manufacturer/supplier of the equipment.
2.4 Personnel qualification
The skilled electrical personnel must have knowledge of ignition protection types,
regulations and provisions for equipment in hazardous areas.
2. Safety

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WIKA additional information model TR21 (Ex i)8
2.5 Labelling, safety marks
Product labels (example)


Model
Date of manufacture (year-month)
Approval-related data
Information on version (measuring element, output signal, measuring range...)
■
Thermometer with transmitter and output signal 4 ... 20 mA
■
Thermometer with direct sensor output with Pt100 and Pt1000
Serial number, TAG number
Before mounting and commissioning the instrument, ensure you
read the operating instructions!



2. Safety

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WIKA additional information model TR21 (Ex i) 9







Thermowell marking
Max. nominal pressure
Pipe standard
CE mark
Hygiene class
Identification of the qualified inspector (for stamping)
Material code (complete assembly)
Tubular body material
Outer diameter x wall thickness (in mm)
3. Commissioning, operation
DANGER!
Danger to life from explosion
By using a measuring insert without a suitable connection head (case), an
explosion risk occurs which can cause fatalities.
▶
Only use the measuring insert in the connection head designed for it.
DANGER!
Danger to life from missing instrument grounding
With missing or incorrect grounding, there exists a risk of dangerous voltages
(leading to, for example, mechanical damage, electrostatic charge or
induction).
▶
Ground thermometer!
Observe the special conditions (see chapter 4 “Special conditions for safe use
(X conditions)”, point 2).

2. Safety / 3. Commissioning, operation

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WIKA additional information model TR21 (Ex i)10
3.1 Mounting within metallic enclosures
■
The case must be grounded against electromagnetic fields and electrostatic charge.
■
It must not be connected separately to the equipotential bonding system.
■
It is sufficient if the metallic thermowell has a solid and secured contact with the metallic
vessel or its structural components or pipelines, so long as these components are
connected to the equipotential bonding system.
3.2 Mounting within non-metallic enclosures
■
Ground the cable shield at one end, preferably in the safe, and so non-Ex, area
(EN 60079-14). For instruments with cable outlet, the shield is connected to the case.
The simultaneous connection of the case and the cable shield to ground is only
permitted if any potential losses between the shield connection (e.g. at the isolated
barrier) and the case can be excluded (see EN 60079-14).
■
Power the resistance thermometer via an intrinsically safe current circuit (Ex ia).
■
Both the effective internal capacitance and inductance must be considered
■
Fine-stranded leads with bare ends must be finished with end splices (cable
preparation)
3.3 Electrical connection
The temperature resistance of the connection lead must match the permissible operating
temperature of the cases. For ambient temperatures above 60 °C, heat-resistant
connection leads must be used (see chapter 6 “Accessories”).
3.4 Electrical connection values
■
Thermometer with transmitter and output signal 4 … 20 mA (models TR21-x-xTT,
TR21-x-xTB)
Parameters Hazardous gas
atmosphere
Hazardous dust
atmosphere
Terminals + / - + / -
Voltage UiDC 30 V DC 30 V
Current li120 mA 120 mA
Power Pi800 mW 750/650/550 mW
Effective internal capacitance Ci29.7 nF 29.7 nF
Effective internal inductance Linegligible negligible
Maximum self-heating at the
sensor or thermowell tip
15 K 15 K
3. Commissioning, operation

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WIKA additional information model TR21 (Ex i) 11
■
Thermometer with direct sensor output with Pt100 (model TR21-x-xPx) and
Pt1000 (model TR21-x-xRx)
Parameters Hazardous gas
atmosphere
Hazardous dust
atmosphere
Terminals 1 - 4 1 - 4
Voltage UiDC 30 V DC 30 V
Current li550 mA 250 mA
Power Pi1,500 mW 750/650/550 mW
Effective internal capacitance Cinegligible negligible
Effective internal inductance Linegligible negligible
Maximum self-heating at the
sensor or thermowell tip
(Rth) = 335 K/W (Rth) = 335 K/W
3.5 Overview of the temperature zones
■
Model TR21-A
14103751.02
with transmitter without transmitter
Ta: -40 ... +85 °C Ta: -50 ... +85 °C
Ta: -40 ... +100 °C Ta: -50 ... +100 °C
Ta: -40 ... +150 °C Ta: -50 ... +150 °C
TProcess: -30 ... +250 °C TProcess: -30 ... +250 °C
3. Commissioning, operation

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WIKA additional information model TR21 (Ex i)12
■
Model TR21-B
■
Model TR21-C
14103751.01
with transmitter without transmitter
Ta: -40 ... +85 °C Ta: -50 ... +85 °C
Ta: -40 ... +100 °C Ta: -50 ... +100 °C
Ta: -40 ... +150 °C Ta: -50 ... +150 °C
TProcess:
-30 ... +150 °C
TProcess:
-30 ... +150 °C
14103751.01
with transmitter
without neck tube
without transmitter
without neck tube
with transmitter
without neck tube
without transmitter
without neck tube
Ta: -40 ... +85 °C Ta: -50 ... +85 °C
Ta: -40 ... +85 °C Ta: -50 ... +85 °C
Ta: -40 ... +150 °C Ta: -50 ... +150 °C
TProcess: -30 ... +150 °C TProcess: -30 ... +150 °C TProcess: -30 ... +250 °C TProcess: -30 ... +250 °C
Process
connection
Process
connection
Process
connection
Process
connection
3. Commissioning, operation

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WIKA additional information model TR21 (Ex i) 13
3.6 Mounting examples
■
Model TR21-A
■
Model TR21-B
associated electrical
equipment
Intrinsically safe
supply or suitable
barrier
fully in zone 0 or 20, marking 1G or 1D fully in zone 1 or 21, marking 2G or 2D
Zone 0 Zone 20
Zone 1, marking 1/2G Zone 21, marking 1/2D
Separation of Ex zones
14103747.01
Intrinsically safe
supply or suitable
barrier
Non-hazardous
area
Hazardous area
Hazardous area
Non-hazardous
area
Hazardous area
associated electrical
equipment
Intrinsically safe
supply or suitable
barrier
fully in zone 0 or 20, marking 1G or 1D fully in zone 1 or 21, marking 2G or 2D
Zone 0 Zone 20
Zone 1, marking 1/2G Zone 21, marking 1/2D
Separation of Ex zones
14103747.01
Intrinsically safe
supply or suitable
barrier
Non-hazardous
area
Hazardous area
Hazardous area
Non-hazardous
area
Hazardous area
3. Commissioning, operation

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WIKA additional information model TR21 (Ex i)14
■
Model TR21-C
4. Special conditions for safe use (X conditions)
1. Thermal backflow from the process, that exceeds the permissible ambient temperature
of the transmitter or the cases, must not occur and must be prevented by the installation
of suitable heat insulation or a neck tube of suitable length.
2. The wall thickness is greater than 0.2 mm and less than 1 mm.Thus the instruments
must not be subjected to ambient stresses that may have an adverse effect on the
partition. Alternatively, a thermowell of suitable minimum wall thickness may be used.
3. When using a thermowell/neck tube, the overall instrument must be designed such that
it allows installation in a way that results in a sufficiently tight gap (IP67) or a flameproof
gap (EN/IEC 60079-1) towards the less hazardous area.
4. The ambient temperature range (Ta) for variants with optional connection cable with
moulded M12 x 1 connector is limited to -20 ... +80 °C.
5. The ambient temperature range (Ta) for variants with optional EN 175301 M12 adapters
is limited to -40 ... +85 °C.
associated
electrical
equipment
Intrinsically safe
supply or suitable
barrier
fully in zone 0 or 20, marking 1G or 1D fully in zone 1 or 21, marking 2G or 2D
Zone 0 Zone 20
Zone 1, marking 1/2G Zone 21, marking 1/2D
Separation of Ex zones 14103747.01
Non-hazardous
area
Hazardous
area
Hazardous area
Non-
hazardous
area
Hazardous
area
Intrinsically safe
supply or suitable
barrier
Intrinsically safe
supply or suitable
barrier
Intrinsically safe
supply or suitable
barrier
Intrinsically safe
supply or suitable
barrier
Process
connection welded
3. Commissioning, operation / 4. Special conditions for safe ...

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5. Calculation examples for self-heating at the thermowell tip
5.1 Example calculation
Use at the partition to zone 0
The maximum possible temperature, Tmax, at the Ø 6 mm thermowell tip with transmitter is
being sought.
Tmax is obtained by adding the temperature of the medium and the self-heating.The
self-heating depends on the supplied power Poas well as the thermal resistance Rth and is
15 K.
Example
Diameter: 6 mm
Medium temperature: TM= 150 °C
Temperature class T3 (200 °C) must not be exceeded
Self-heating: 15 K
Tmax = TM+ self-heating: 150 °C + 15 °C = 165 °C
As safety margin for type-examined instruments (for T6 to T3), an additional 5 °C must be
subtracted from the 200 °C; hence 195 °C would be permissible.This means that in this
case temperature class T3 is not exceeded.
Additional information:
Temperature class for T3 = 200 °C
Safety margin for type-tested instruments (T6 to T3) 1) = 5 K
Safety margin for type-tested instruments (T2 to T1) 1) = 10 K
1) EN/IEC 60079-0: 2012 section 26.5.1
6. Accessories
Accessories Order number
Connection cable with moulded connector M12 x 1
■
Cable box straight, 4-pin, ingress protection IP67
Temperature range -20 ... +80 °C
2 m 14086880
5 m 14086883
■
Angled socket, 4-pin, ingress protection IP67
Temperature range -20 ... +80 °C
2 m 14086889
5 m 14086891
5. Calculation examples for self-heating ... / 6. Accessories

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   


Entity parameters TR21-*-W-*, TR31-*-W-*, TR34-W-*
Intrinsically safe installation
Appendix 1: CSA control drawing

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NIFW parameters TR21-*-W-*, TR31-*-W-*, TR34-W-*
Nonincendive field wiring installation
TR*
Non-Incendive field wiring apparatus
Intrinsic safety barrier not required. Vmax or Ui ≤ DC 30 V
CSA or FM approved associated apparatus
or associated nonincendive field firing apparatus
≥ ≥ ≥ ≥ ≥ ≥ ≥
Appendix 1: CSA control drawing

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Appendix 2: EU declaration of conformity

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Appendix 3: EPL Matrix
EPL matrix
Model Ex ia, Ex ib, Ex ic Ex eb, Ex ec, Ex tb, Ex tc, Ex nA
EPL
Ga Da Ga/
Gb
Da/
Db
Gb Db Gc Gb Db Gc Dc
TR21-A ----
TR21-B ----
TR21-C ----

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