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
DT0390 page 5
Sensor wiring diagram without head
2 wire
3 wire
4 wire

TWL
page 6 DT0390
Transmitter wiring diagram

TWL
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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
DT0390 page 9
 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.

TWL
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8. Description of the Factory Label