WIKA TFS135 Operating instructions

EN

Operating instructions

Betriebsanleitung

Mode d'emploi

DE

FR

Bimetal temperature switches, model TFS135

Bimetal temperature switch, model TFS135

Bimetall-Temperaturschalter, Typ TFS135

Thermostat bimétallique, type TFS135

2

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WIKA operating instructions model TFS135

DE

FR

Operating instructions model TFS135 Page 3 - 22

Betriebsanleitung Typ TFS135 Seite 23 - 42

Mode d'emploi type TFS135 Page 43 - 61

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!

Keep for later use!

Vor Beginn aller Arbeiten Betriebsanleitung lesen!

Zum späteren Gebrauch aufbewahren!

Lire le mode d'emploi avant de commencer toute opération !

A conserver pour une utilisation ultérieure !

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Contents

1. General information 4

2. Design and function 5

3. Safety 7

4. Transport, packaging and storage 11

5. Commissioning, operation 12

6. Maintenance and cleaning 16

7. Dismounting, return and disposal 17

8. Specifications 20

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4 WIKA operating instructions model TFS135

1. General information

■

The bimetal temperature switch described in the operating

instructions has been manufactured using state-of-the-art

technology. All components are subject to stringent quality and

environmental criteria during production. Our management

systems are certied to ISO 9001 and ISO 14001.

■

These operating instructions contain important information on

handling the instrument. Working safely requires that all safety

instructions and work instructions are observed.

■

Observe the relevant local accident prevention regulations and

general safety regulations for the instrument's range of use.

■

The operating instructions are part of the product and must be kept

in the immediate vicinity of the instrument and readily accessible to

skilled personnel at any time. Pass the operating instructions on to

the next operator or owner of the instrument.

■

Skilled personnel must have carefully read and understood the

operating instructions prior to beginning any work.

■

The general terms and conditions contained in the sales

documentation shall apply.

■

Subject to technical modications.

■

Further information:

- Internet address: www.wika.de / www.wika.com

- Relevant data sheet: TV 35.02

- Application consultant:

Tel.: +49 9372 132-0

Fax: +49 9372 132-406

info@wika.de

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2. Design and function

2.1 Overview



Electrical connection



Process connection



Thermowell

2.2 Description

The model TFS135 bimetal temperature switch consists of a

thermowell with integrated switching element and a permanently

mounted connector. In addition to a second switch contact, it is also

possible to integrate a Pt1000 or Pt100 measuring element to enable

continuous temperature measurement. The TFS135 is screwed

directly into the process.

All electrical components are protected against splash water. The

electrical connection is via the connector.













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6 WIKA operating instructions model TFS135

2. Design and function

2.3 Dimensions in mm

2.4 Scope of delivery

Cross-check scope of delivery with delivery note.

Circular connector

M12 x 1

Circular connector

M12 x 1 with neck tube

45 mm

Rectangular connector

per EN 175301-803

14182125.02

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3. Safety

3.1 Explanation of symbols

WARNING!

... indicates a potentially dangerous situation that can

result in serious injury or death, if not avoided.

CAUTION!

... indicates a potentially dangerous situation that can

result in light injuries or damage to property or the

environment, if not avoided.

DANGER!

... identies hazards caused by electric power. Should

the safety instructions not be observed, there is a risk of

serious or fatal injury.

WARNING!

... indicates a potentially dangerous situation that can

result in burns, caused by hot surfaces or liquids, if not

avoided.

Information

... points out useful tips, recommendations and information

for ecient and trouble-free operation.

3.2 Intended use

The model TFS135 bimetal temperature switches are used to limit

temperatures within a wide variety of industrial applications.

The TFS135 are temperature limiting instruments. They are not

intended to provide any safety or protective functionality.

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8 WIKA operating instructions model TFS135

3. Safety

They monitor the temperature of machinery and equipment during

normal operation and, for example, switch o machinery if it

overheats.

The instruments are not approved for use in hazardous areas!

The instrument has been designed and built solely for the intended

use described here, and may only be used accordingly.

The technical specications contained in these operating instructions

must be observed. Improper handling or operation of the bimetal

temperature switch outside of its technical specications requires the

instrument to be taken out of service immediately and inspected by

an authorised WIKA service engineer.

The manufacturer shall not be liable for claims of any type based on

operation contrary to the intended use.

3.3 Improper use

WARNING!

Injuries through improper use

Improper use of the instrument can lead to hazardous

situations and injuries.

▶

Refrain from unauthorised modications to the

instrument.

▶

Do not use the instrument within hazardous areas.

▶

Do not use the instrument with abrasive or viscous

media.

Any use beyond or dierent to the intended use is considered as

improper use.

Do not use this instrument in safety or emergency stop devices.

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3. Safety

3.4 Responsibility of the operator

The instrument is used in the industrial sector. The operator is

therefore responsible for legal obligations regarding safety at work.

The safety instructions within these operating instructions, as well

as the safety, accident prevention and environmental protection

regulations for the application area must be maintained.

The operator is obliged to maintain the product label in a legible

condition.

To ensure safe working on the instrument, the operating company

must ensure

■

that suitable rst-aid equipment is available and aid is provided

whenever required.

■

that the operating personnel are regularly instructed in all topics

regarding work safety, rst aid and environmental protection

and know the operating instructions and in particular, the safety

instructions contained therein.

■

that the instrument is suitable for the particular application in

accordance with its intended use.

■

that personal protective equipment is available.

3.5 Personnel qualification

WARNING!

Risk of injury should qualication be insucient

Improper handling can result in considerable injury and

damage to equipment.

▶

The activities described in these operating instructions

may only be carried out by skilled personnel who have

the qualications described below.

▶

Keep unqualied personnel away from hazardous

areas.

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3. Safety

Skilled personnel

Skilled personnel are understood to be personnel who, based on

their technical training, knowledge of measurement and control

technology and on their experience and knowledge of country-

specic regulations, current standards and directives, are capable

of carrying out the work described and independently recognising

potential hazards.

Special operating conditions require further appropriate knowledge,

e.g. of aggressive media.

3.6 Labelling, safety marks

Product label (example)



Model



Contact version, switching temperature, measuring element



Number of production order



Approval logos

Before mounting and commissioning the instrument,

ensure you read the operating instructions!

TFS135

NC 60 °C

12345678

   

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4. Transport, packaging and storage

4.1 Transport

Check the instrument for any damage that may have been caused by

transport.

Obvious damage must be reported immediately.

CAUTION!

Damage through improper transport

With improper transport, a high level of damage to

property can occur.

▶

When unloading packed goods upon delivery as well

as during internal transport, proceed carefully and

observe the symbols on the packaging.

▶

With internal transport, observe the instructions in

chapter 4.2 “Packaging and storage”.

If the instrument is transported from a cold into a warm environment,

the formation of condensation may result in instrument malfunction.

Before putting it back into operation, wait for the instrument

temperature and the room temperature to equalise.

4.2 Packaging and storage

Do not remove packaging until just before mounting.

Keep the packaging as it will provide optimum protection during

transport (e.g. change in installation site, sending for repair).

Permissible conditions at the place of storage:

■

Storage temperature: -40 ... +85 °C

■

Humidity: 35 ... 85 % relative humidity (no condensation)

Avoidance of exposure to the following factors:

■

Direct sunlight or proximity to hot objects

■

Mechanical vibration, mechanical shock (putting it down hard)

■

Soot, vapour, dust and corrosive gases

■

Hazardous environments, ammable atmospheres

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4. Transport ... / 5. Commissioning, operation

Store the bimetal temperature switch in its original packaging in

a location that fulls the conditions listed above. If the original

packaging is not available, pack and store the instrument as

described below:

1. Wrap the instrument in an antistatic plastic lm.

2. Place the instrument, along with the shock-absorbent material, in

the packaging.

3. If stored for a prolonged period of time (more than 30 days), place

a bag containing a desiccant inside the packaging.

5. Commissioning, operation

WARNING!

Physical injuries and damage to property and the

environment caused by hazardous media

Upon contact with hazardous media (e.g. oxygen,

acetylene, ammable or toxic substances), harmful media

(e.g. corrosive, toxic, carcinogenic, radioactive), and

also with refrigeration plants and compressors, there is a

danger of physical injuries and damage to property and

the environment.

Should a failure occur, aggressive media with extremely

high temperature and under high pressure or vacuum may

be present at the instrument.

▶

For these media, in addition to all standard regulations,

the appropriate existing codes or regulations must also

be followed.

CAUTION!

Damage to the instrument

When working on open electric circuits (printed circuit

boards) there is a risk of damaging sensitive electronic

components through electrostatic discharge.

▶

The correct use of grounded working surfaces and

personal armbands is required.

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5. Commissioning, operation

5.1 Installation

When the temperature switch is mounted, the temperature must

neither drop below the allowed operating temperature (environment,

medium) nor exceed it, even when taking convection and heat

radiation into account.

The installation site must be protected from weather inuences and

permanent UV exposure/sun radiation.

Depending on the type of application, the electrical connection must

be protected from mechanical damage.

5.2 Electrical connection

DANGER!

Danger to life caused by electric current

Upon contact with live parts, there is a direct danger

to life.

▶

The instrument may only be installed and mounted

by skilled personnel.

▶

Operation using a defective power supply unit (e.g.

short-circuit from the mains voltage to the output

voltage) can result in life-threatening voltages at

the instrument!

▶

Only connect in an unpowered state!

▶

Only disconnect the mating connector with the

voltage disconnected.

▶

Use suitable mating connectors for the current and

voltage ranges.

■

Fine-stranded leads must be nished with end splices.

■

Cables used must comply with the respective requirements in

terms of stability and temperature.

■

Connection cables must be run so that any mechanical damage is

prevented.

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14 WIKA operating instructions model TFS135

5. Commissioning, operation

■

Only connect circuits with the same voltage and type of protection

to the switch contacts and connecting cables.

■

Size the connecting cables for the largest current strength in the

circuits.

Voltages > AC 50 V or DC 75 V

■

The TFS135 must be connected to the system of the protective

grounding of the end product or the end application via the process

connection.

■

Circuits must oer a device, external to the measuring instrument,

that enables the instrument to be isolated from the electrical

supply. This must be easily accessible and be marked as the

isolation device for the instrument.

■

Cables and circuits must full the isolation requirements and

conform to, for example, IEC 60227 or IEC 60245.

■

Do not connect circuits simultaneously with extra-low voltage

circuits, or with safety extra-low voltage circuits (SELV) or

protected extra-low voltage circuits (PELV).

The earthing terminal is not connected and therefore it does not

provide electrical connection to protective earth.

Pin assignment

■

Version with one switch contact

Rectangular connector per

EN 175301-803

Circular connector M12 x 1

not connected

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5. Commissioning, operation

■

Version with 2 switch contacts

■

Version with 1 switch contact and 1 measuring element

Circular connector M12 x 1

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6. Maintenance and cleaning

For contact details see chapter 1 “General information” or

the back page of the operating instructions.

6.1 Maintenance

The bimetal temperature switch is maintenance-free.

Repairs should only be carried out by the manufacturer or, following

prior consultation, by correspondingly qualied skilled personnel.

6.2 Cleaning

CAUTION!

Physical injuries and damage to property and the

environment

Improper cleaning may lead to physical injuries and

damage to property and the environment. Residual

media in the dismounted instrument can result in a risk to

persons, the environment and equipment.

▶

Carry out the cleaning process as described below.

1. Prior to cleaning, switch o and disconnect the instrument from

the voltage supply.

2. Clean the instrument with a moist cloth.

Electrical connections must not come into contact with moisture!

CAUTION!

Damage to the instrument

Improper cleaning may lead to damage to the instrument!

▶

Do not use any aggressive cleaning agents.

▶

Do not use any hard or pointed objects for cleaning.

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6. Maintenance and cleaning / 7. Dismounting ...

3. Wash or clean the dismounted instrument, in order to protect

persons and the environment from exposure to residual media.

For information on returning the instrument see chapter

7.2 “Return”.

7. Dismounting, return and disposal

7.1 Dismounting

WARNING!

Physical injuries and damage to property and the

environment through residual media

Upon contact with hazardous media (e.g. oxygen,

acetylene, ammable or toxic substances), harmful media

(e.g. corrosive, toxic, carcinogenic, radioactive), and

also with refrigeration plants and compressors, there is a

danger of physical injuries and damage to property and

the environment.

▶

Before storage of the dismounted instrument (following

use) wash or clean it, in order to protect persons and

the environment from exposure to residual media. This

is of particular importance if the medium is hazardous

to health, e.g. caustic, toxic, carcinogenic, radioactive,

etc.

▶

Observe the information in the material safety data

sheet for the corresponding medium.

▶

Wash or clean the dismounted instrument, in order to

protect persons and the environment from exposure to

residual media.

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7. Dismounting, return and disposal

WARNING!

Risk of burns

During dismounting there is a risk of dangerously hot

media escaping.

▶

Let the instrument cool down suciently before

dismounting it!

DANGER!

Danger to life caused by electric current

Upon contact with live parts, there is a direct danger to life.

▶

The dismounting of the instrument may only be carried

out by skilled personnel.

▶

Only demount the strap-on thermometer in a

de-energized state.

WARNING!

Physical injury

When dismounting, there is a danger from aggressive

media and high pressures.

▶

Observe the information in the material safety data

sheet for the corresponding medium.

▶

Only disconnect the bimetal temperature switch once

with the voltage disconnected!

7.2 Return

Strictly observe the following when shipping the instrument:

All instruments delivered to WIKA must be free from any kind of

hazardous substances (acids, bases, solutions, etc.) and must

therefore be cleaned before being returned.

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7. Dismounting, return and disposal

WARNING!

Physical injuries and damage to property and the

environment through residual media

Residual media in the dismounted instrument can result in

a risk to persons, the environment and equipment.

▶

With hazardous substances, include the material safety

data sheet for the corresponding medium.

▶

Clean the instrument, see chapter 6.2 “Cleaning”.

When returning the instrument, use the original packaging or a

suitable transport packaging.

To avoid damage:

1. Wrap the instrument in an antistatic plastic lm.

2. Place the instrument, along with the shock-absorbent material, in

the packaging.

Place shock-absorbent material evenly on all sides of the transport

packaging.

3. If possible, place a bag containing a desiccant inside the

packaging.

4. Label the shipment as carriage of a highly sensitive measuring

instrument.

Information on returns can be found under the heading

“Service” on our local website.

7.3 Disposal

Incorrect disposal can put the environment at risk. Dispose

of instrument components and packaging materials in an

environmentally compatible way and in accordance with the country-

specic waste disposal regulations.

Do not dispose of with household waste. Ensure a proper

disposal in accordance with national regulations.

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8. Specications

8. Specifications

Specications

Temperature ranges

Nominal Switching

Temperature (NST)

50 ... 130 °C

Note:

The nominal switching temperature can be

selected in steps of 5 K. It is preset on delivery and

cannot be changed.

Switch point accuracy ±5 K

Reset Switching

Temperature (RST)

Typically 15 ... 40 K below the switching

temperature

To ensure a safe reset of the switch at low

switching temperatures, care must be taken

that the temperature dierence between the

measuring point and environment is high

enough; since otherwise the switch cannot cool

back down to the reset switching temperature

and thus the instrument will not be able to

return to its normal state.

Ambient temperature The maximum permissible ambient temperature

depends on the electrical connection.

Note:

Due to short installation length there is a risk that

the temperature at the connector will rise up to an

inadmissibly high value. This absolutely must be

taken into account when designing the measuring

point. The temperature at the connector must not

exceed the above mentioned temperature range.

- Rectangular connector

per EN 175301-803

-30 ... +85 °C

- Circular connector

M12 x 1

-25 ... +55 °C

Operating pressure Max. 50 bar

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