Kobold TWL User manual

Page 1 DT0390
Operating Instructions
for
Temperature Sensor
Model: TWL
Ignition Protection Ex ia

TWL
page 2 DT0390
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 3
5.Operating Principle ........................................................................................ 4
6.Electrical connection ..................................................................................... 4
Sensor wiring diagram with head .................................................................. 4
6.1Head model D wiring diagram .............................................................. 7
6.2Head model R wiring diagram .............................................................. 7
7.Use in hazardous Areas ................................................................................ 8
7.1Area of validity ..................................................................................... 8
7.2Guidelines ............................................................................................ 8
7.3General ................................................................................................ 8
7.4Protection against E.S.D. (Electrostatic Discharge) ............................. 9
7.5Maintenance and repairs ..................................................................... 9
7.6Storage ................................................................................................ 9
8.Description of the Factory Label.................................................................. 10
9.Installation in the classified area ................................................................. 11
10.Examples of installation in explosion-proof areas conform to the protection
type “intrinsically safe”: “Ex ia” .................................................................. 11
11.Technical Details ......................................................................................... 12
Materials ..................................................................................................... 12
12.Trouble Shooting ......................................................................................... 15
13.Dismounting, return and disposal ................................................................ 16
13.1Dismounting ....................................................................................... 16
13.2Disposal ............................................................................................. 16
14.Order codes ................................................................................................ 16
15.EU-Declaration of conformity ...................................................................... 17
16.ATEX-Certificates ........................................................................................ 18
17.Note ............................................................................................................ 23
Manufactured by:
Kobold Mesura S.L.U
Avda. Conflent 68 nave 15
08915 Badalona
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
www.kobold.com
Edition: may 2022

TWL
Page 3 DT0390
2. Note
Please read these operating instructions before unpacking and putting the unit in
operation. Follow the instructions precisely as described herein.
The instruction manuals on our website WWW.kobold.com are always for
currently manufactured version of our products. Due to technical changes, the
instruction manuals available online may not always correspond to the product
version you have purchased. If you need an instruction manual that correspond to
the purchased product version, you can request it from us free of charge by email
([email protected]) in PDF format, specifying the relevant invoice number and
serial number. If you wish, the operating instructions can also be sent to you by
post in paper form against an applicable postage fee.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations
applying to Health & Safety and prevention of accidents.
When used in machines, the measuring unit should be used only when the
machines fulfil the EC-machine guidelines.
3. Instrument Inspection
Instruments are inspected before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of
the delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, since they are responsible for damages during
transit.
Scope of delivery:
The standard delivery includes:
 Device model: TWL
4. Regulation Use
The temperature sensors of series TWL are suitable for all applications where
processes involving fluids, solid bodies or materials, or gases, require
temperature recording and measurement. Our temperature sensors are suitable
for use in the following industrial areas: chemicals, petrochemicals, water, feed,
food, sanitary, etc.
Any use of the Temperature Sensor, model: TWL, which exceeds the
manufacturer’s specification may invalidate its warranty. Therefore, any resulting
damage is not the responsibility of the manufacturer. The user assumes all risk
for such usage.

TWL
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5. Operating Principle
Resistance thermometers work by using the continuous change of resistance of
metals subject to temperature rising and decreasing. The most common
resistance material used is platinum, as it is very stable and has very good
repeatability. The temperature coefficient of platinum is positive, so its resistance
increases as the temperature rises. This property is defined in the IEC751
standard, which defines measurements deviations categories A and B.
6. Electrical connection
Sensor wiring diagram with head

TWL
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Sensor wiring diagram without head
2 wire
3 wire
4 wire

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Transmitter wiring diagram

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6.1 Head model D wiring diagram
With transmitter 5333D
With transmitter 5337D
6.2 Head model R wiring diagram
With transmitter 5333D
With transmitter 5337D
Note: For electrical connection of transmitter please refer to their separate manual.

TWL
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7. Use in hazardous Areas
7.1 Area of validity
These security instructions apply to TWL Series temperature sensors and their
accessories for use in explosion-proof atmospheres conform to CE certificate
LOM 08ATEX2015 X
7.2 Guidelines
The TWL Series temperature measuring instruments work according to the heat
resistance measuring principle. This measuring principle acts to check and
measure the temperature also in Ex areas.
TWL devices can be with a standard 4 to 20 mA signal transmitter, protocol Hart,
Profibus/Fieldbus or with direct access to the sensor. They are appropriate for
use in Group IIC and Categories 1G/D Atex atmospheres.
The temperature class and/or the surface temperature relates solely to a device
operated at ambient temperature. On installation the actual temperature class for
process operation must be determined.
The inlet bushings used must conform to the certification for their type in
accordance with the directive.
The requirements of Regulation 2014/34/EU, and the applicable national
regulations for the use of measuring instruments in Ex areas, such as EN 60079,
EN 60079-11 and other regulations relating to this certification type, must be
fulfilled.
Only qualified specialist personnel may install devices in Ex areas.
7.3 General
 When installing the sensor, it is necessary to follow all the instructions and
regulations for explosion-proof areas and the safety instructions included in
these instructions.
 TWL-S, TWL-N, TWL-I and TWL-P must be protected with an enclosure at
least a degree of protection IP20.
 Make sure that the details on the sensor’s type label correspond to the working
conditions for the application.
 When installing the device, make sure you do not create any mechanical
deformation as a result of solder spots or the application of mechanical force.

TWL
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 Important: Make sure there is an electrical connection between the device’s
earth and the earth of the system.
 Make sure the lid is closed before putting the device into operation.
 Before re-opening the lid, remove the plug from the mains or de-energise the
device and make sure there is no danger of explosion.
The use in zone 0 of heads made of aluminum should be restricted to locations
where the risk of ignition due to mechanical impact is not possible.
7.4 Protection against E.S.D. (Electrostatic Discharge)
Temperature sensors with plastic parts that can become electrically charged bear
a warning label. Electrical charging must be avoided at all costs. Pay attention to
the following:
- Avoid rubbing the device
- Never clean the device dry
- Do not install the device near material airflows or near steam outlets
7.5 Maintenance and repairs
The instrument does not require maintenance or servicing.
Repairs must be only carried out by Kobold Mesura (manufacturer)
7.6 Storage
Measuring instruments should be protected against humidity and dust.
Storage temperature: -40ºC….+85ºC for sensors without transmitter.
Storage temperature: See manual of the corresponding transmitter and display
model.

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8. Description of the Factory Label

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9. Installation in the classified area
Examples of installation in explosion-proof areas conform to the protection type
“intrinsically safe”: “Ex ia”
Hazardous area Safe area

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10. Technical Details
Sensor wiring
- 2 wires Error due to the lead resistance of the sensor
- 3 wires With connecting wires up to 25 m, lead resistance is negligible.
- 4 wires The lead resistance of the connecting wires is negligible
Sensor according to IEC 60751
-Class B
-Class A
-Class 1/3
-Class 1/10
The nominal value of Pt100 sensors is 100Ω at 0 ºC.
Tolerance class
-Class B ±0.3 + 0.005 * t
-Class A ±0.15 + 0.002 * t
-Class 1/3 ±0.10 + 0.005 * t
-Class 1/10 ±0.03 + 0.0017 * t
t= measuring temperature in ºC without sign
General details
Ambient temperature: -40…+150ºC with ceramic terminal base
-40…+85ºC with transmitter
-40…+85ºC TWL-ST model
Meas. Range: -70…+600ºC (-40…+85ºC TWL-T model)
( other on request )
Operating pressure: Max. 30 bar (depending on model, see order details)
Connection head: Form G with chain.
Aluminium or polycarbonate head on model TWL-T
Without head on models TWL-S, TWL-N, TWL-T,
TWL-I and TWL-P
Materials
Sensor: Stainless steel 1.4404 (others on request)
Neckpipe: Stainless steel 1.4404 (others on request)
Connection head: Aluminium, painted, PP, polycarbonate or Stainless
Steel (see order details)
Cable: Silicone, PTFE, PVC, Fiberglass with steel braid on
model TWL-S, TWL-N, TWL-T, TWL-I and TWL-P
(others on request)

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Terminal base: Ceramic terminal block only for models with head
connections. (without transmitter)
Process connection
Thread: G1/4”, G1/2” G3/4”, G1” male (others on request)
Flange: DIN or ANSI see codes (others on request)
ATEX-approval
Ex II 1 GD Ex ia IIC T4..T6/
Ex iaD 20 IP65
T85ºC -20ºC ≤ Ta ≤ +60ºC
Head transmitter
- Output: analogue output 4…20m A
- Communication: HART®-protocol
PROFIBUS
®/Fieldbus
- Minimum meas. span: standard transmitter 25ºK
transmitter with HART
® 10ºK
transmitter with PROFIBUS
®/Fieldbus 5ºK
- Supply voltage: 8…35 Vdc for standard transmitter and transmitter
with Hart
9…32 Vdc for transmitter with PROFIBUS®/Fieldbus
Note
For programming of transmitter please refer to their separate programming
manual.
Sensors model TWL-SN and TWL-SA have not head transmitter, you must use
remote transmitter.
Transmitter 5333D
Ambient temperature: -40...+85 ºC
Power supply: 8...35 V
Accuracy: Absolute accuracy ≤ ±0.3 ºC
Temp. Coefficient (≤ ±0.01 ºC/ºC)
Current Output: 4...20 mA
Load resistance: ≤ (V supply - 8) / 0.023
Sensor error detection: Programmable 3.5…23 mA
NAMUR NE43 Upscale and
NAMUR NE43 Downscale

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Transmitter 5337D
Ambient temperature: -40...+85 ºC
Power supply: 8...35 V
Accuracy: Absolute accuracy ≤ ±0.1 ºC
Temp. Coefficient (≤ ±0.005 ºC /ºC)
Current Output: 4...20 mA HART®
Load resistance: ≤ (V supply - 8) / 0.023
Sensor error detection: Programmable 3.5…23 mA
NAMUR NE43 Upscale and
NAMUR NE43 Downscale
Transmitter 5350D
Ambient temperature: -40...+85 ºC
Power supply: 9...32 V
Accuracy: Absolute accuracy ≤ ±0.1 ºC
Temp. Coefficient (≤ ±0.002 ºC / ºC)
Output: PROFIBUS
® PA protocol
FOUNDATIONTM FIELDBUS protocol
Display type D/R
Ambient temperature: -30...+80 ºC
Loop voltage drop: two levels depending on chosen
backlight brightness at 20 mA:
low bright backlight (<40%):
max. 4 V at 23 ºC
high bright backlight (>40%)
max. 6.5 V at 23 ºC
Accuracy: ≤ ±0.1% of input span within
-10...70 ºC
≤ ±0.2% of input span within
-30...-10 ºC/70...80 ºC
Measuring range: 4...20 mA
Error/warning indication: Individually configurable display
and backlight indication in white,
green or red colour, steady or
between 3.5 and 23 mA
Relay (only type R): Contacts 2 solid state relays
Max. Voltage 60 Vp
Max. Load current 75 mA
Note
For programming of transmitter please refer to their separate programming
manual.
Sensors model model TWL-S, TWL-N, TWL-I and TWL-P have not head
transmitter, you must use remote transmitter.

TWL
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11. Trouble Shooting
Faults Possible Causes Corrective actions
No signal/line breakage Mechanical load too high or
over temperature.
Line breakage.
Replace probe or measuring
insert.
Check wiring.
Wrong measured values Sensor drift caused by over
temperature
Replace probe or measuring
insert.
Sensor drift caused by
chemical attack
Use a sensor with thermowell
Wrong measured values
(too low)
Entry of moisture into cable or
measuring insert
Replace probe or measuring
insert.
Wrong measured values
and response times too long
Wrong mounting geometry,
for example mounting depth
too deep or heat dissipation
too high
The temperature-sensitive
area of the sensor must be
inside the medium, and
surfaces must be isolated.
Deposits on the sensor or
thermowell
Remove deposits
Oscillation of measured
value
Cable break in connecting
cable or loose contact caused
by mechanical overload
Replace probe or measuring
insert with a suitable design,
for example equipped with a
strain relief or a thicker
conductor cross-section.
Check wiring
Corrosion
Composition of the medium
not as expected or modified
or wrong thermowell material
selected
Analyze medium and then
select a more-suitable material
or replace thermowell regularly
Signal interference
Stray currents caused by
electric fields
or ground loops
Use of screened connecting
cables,
increase the distance to
motors and
power lines
Ground loop Elimination of potentials, use
of galvanic isolated transmitter
supply isolators or transmitters

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12. Dismounting, return and disposal
12.1 Dismounting
Residual media in dismounted instruments can result in a risk to persons, the
environment and equipment. Take sufficient precautionary measures.
All instruments delivered to KOBOLD must be free from any kind of hazardous
substances (acids, bleaches, solutions, etc.).
12.2 Disposal
Incorrect disposal may endanger the environment.
13. Order codes
For order codes information, please see the technical datasheet.

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14. EU-Declaration of conformity
DECLARACIÓN DE CONFORMIDAD EU
EU DECLARATION OF CONFORMITY
EU-KONFOMITÄTSERKLÄRUNG
DÉCLARATION DE CONFORMITÉ
DICHIARAZIONE DI CONFORMITÀ EU
KOBOLD MESURA S.L.U.
Avda. Conflent 68 nave 15, 08915 Badalona (España)
Declara, bajo la propia responsabilidad, que el producto
Declares under our sole responsibility, that the produkt
Erklärt in alleiniger Verantwortung, daß das produkt
Déclare sous sa seule responsabilité, que le produit
Dichiara sotto la propia responsabilità, che il prodotto
TWL........
A los cuales se refiere esta declaración, son conformes a las siguiente Directivas Europeas:
To which this declaration relates is in conformity with the following European Directives:
Mit folgenden Richtilinien konform ist:
À auxquels se réfère cette déclaration, ils sont conformes aux Directives Européennes suivant :
A ai quali si riferisce questa dichiarazione, sono conformi alle direttive europee seguente:
EMC2014/30/EU LVD2014/35/EU ATEX2014/34/EU RoHS2011/65/EU
Normas armonizadas y documentos de la normativa aplicados:
Applied harmonised standards and normative documents:
Angewandte harmonisierte Normen oder normativer Dokumente:
Normes harmonisées et documents normatifs appliqués
Norme armonizzate e documenti normativi applicati:
EN61010-1:2011 EN61326-1:2021 EN60079-0:2006 (acc. EN60079-0:2021)
EN61000-6-2:2019 EN60079-11:2007 (acc. EN60079-11:2013)
Certificado de examen CE de tipo Marcado
EC-type examination certificat Marking
EG-baumusterprübescheinigung Markierung
Attestation d´examen CE de type Inscription
Certificazione per esame di tipo CE Marcatura
LOM 08ATEX2015 X Ex II 1GD Ex ia IIC T4…T6
Ex iaD 20 IP65
T85ºC -20ºC ≤ Ta ≤ +60ºC
Fabricado en: KOBOLD MESURA SLU Avda. Conflent 68, nave 15 08915 BADALONA (Spain)
Made in:
Hergesteltlt in:
Fabriqué dans:
Fabbricato in:
Organismo notificado: LOM 0163 Número notificación : LOM 05ATEX9070
Notified organism Number notification
Mitgeteilter Organismus Zahlmitteilung
Organization annoncée Nombre notification
Organismo informato Notifica di numero
Badalona june 2017 Gerente
DT0312 25/02/2008
Azzam Charmand
DT0668

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15. ATEX-Certificates

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TWL
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