WIKA ELS series Manuale utente

Operating instructions

Betriebsanleitung

Float switch with external chamber

Model ELS

Schwimmerschalter mit Bezugsgefäß

Typ ELS

Float switch with external chamber (aluminium), model ELS-A

001792.04 11/2018 EN/DE

Operating instructions oat switch, model ELS

Operating instructions model ELS Page 3 - 18

Betriebsanleitung Typ ELS Seite 19 - 34

WIKA®and KSR®are registered trademarks in various countries.

WIKA®und KSR®sind geschützte Marken 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!

Operating instructions oat switch, model ELS

001792.04 11/2018 EN/DE

Contents

Declarations of conformity can be found online at www.wika.com.

1. General information 4

2. Design and function 5

3. Safety 6

4. Transport, packaging and storage 11

5. Commissioning, operation 11

6. Faults 15

7. Maintenance and cleaning 16

8. Dismounting, return and disposal 17

9. Specications 18

001792.04 11/2018 EN/DE

Operating instructions oat switch, model ELS

1. General information

■

The oat switch with external chamber described in the operating

instructions have been designed and 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.

■

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: LM 30.03

1. General information

Operating instructions oat switch, model ELS

001792.04 11/2018 EN/DE

















2. Design and function

2.1 Functional description

Float switches with external chamber work on the oat principle with

magnetic transmission. A reed contact integrated in the guide tube 

is actuated through the magnetic eld of a permanent magnet, when a

preset switch point is reached.The permanent magnet is located within

a oat , which changes its height with the level of the medium it is

monitoring.The switching status of the reed contact can be evaluated

and processed by a connected control device.

2.2 Scope of delivery

Cross-check scope of delivery with delivery note.

Connection housing

Cable gland

External chamber

Process connections

Guide tube

Float

Float limit

Drain plug

2. Design and function

001792.04 11/2018 EN/DE

Operating instructions oat switch, model ELS

3. Safety

3.1 Explanation of symbols

DANGER!

... indicates a directly dangerous situation resulting in serious

injury or death, if not avoided.

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.

Information

... points out useful tips, recommendations and information

for ecient and trouble-free operation.

3.2 Intended use

Float switches with external chamber are used exclusively for

monitoring the levels of liquid media.The scope of application is

defined by the technical performance limits and materials.

■

The liquids must not have any large contamination or coarse

particulates and must not have a tendency to crystallise. Ensure that

the wetted materials of the oat switch are suciently resistant to

the medium being monitored. Not suitable for dispersions, abrasive

liquids, highly viscous media and colours.

■

This instrument is not permitted to be used in hazardous areas! For

these areas, oat switches with approval (e.g. in accordance with

ATEX) are required.

3. Safety

Operating instructions oat switch, model ELS

001792.04 11/2018 EN/DE

■

The operating conditions specied in the operating instructions must

be observed.

■

Do not operate the instrument in the direct vicinity of ferromagnetic

environments (min. distance 50 mm).

■

Do not operate the instrument in the immediate vicinity of strong

electromagnetic elds or in the immediate vicinity of equipment that

can be aected by magnetic elds (min. clearance 1 m).

■

The oat switches must not be exposed to heavy mechanical strain

(impact, bending, vibration).

■

The technical specications contained in these operating instructions

must be observed. Improper handling or operation of the instrument

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 instrument has been designed and built solely for the intended

use described here, and may only be used accordingly.

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

operation contrary to the intended use.

DANGER!

Work on vessels involves the danger of intoxication and

suocation. No work is allowed to be carried out unless by

taking suitable personal protective measures (e.g. respiratory

protection apparatus, protective outt etc.).

3. Safety

001792.04 11/2018 EN/DE

Operating instructions oat switch, model ELS

3.3 Improper use

Improper use is defined as any application that exceeds the technical

performance limits or is not compatible with the materials.

WARNING!

Injuries through improper use

Improper use of the instrument can lead to hazardous

situations and injuries.

▶

Refrain from unauthorised modifications to the instrument.

▶

Do not use the instrument within hazardous areas.

Any use beyond or different to the intended use is considered as

improper use.

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

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.

To ensure safe working on the instrument, the operating company must

ensure

■

that suitable first-aid equipment is available and aid is provided

whenever required.

■

that the operating personnel are regularly instructed in all topics

regarding work safety, first 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. Safety

Operating instructions oat switch, model ELS

001792.04 11/2018 EN/DE

3.5 Personnelqualication

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

qualifications described below.

Skilled personnel

Skilled personnel, authorised by the operator, 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-specific regulations, current standards

and directives, are capable of carrying out the work described and

independently recognising potential hazards.

3.6 Personal protective equipment

The personal protective equipment is designed to protect the skilled

personnel from hazards that could impair their safety or health during

work.When carrying out the various tasks on and with the instrument,

the skilled personnel must wear personal protective equipment.

Follow the instructions displayed in the work area regarding

personal protective equipment!

The requisite personal protective equipment must be provided by the

operating company.

3. Safety

001792.04 11/2018 EN/DE

Operating instructions oat switch, model ELS

3.7 Labelling, safety marks

Product label













Magnetic float switch with

external chamber

Model ELS

Niveau-Messtechnik AG

Heinrich-Kuebler-Platz 1

69439 Zwingenberg









Model, designation

Instrument code

Article number

Measuring point number

Material of external chamber

PT: Test pressure

Ingress protection per IEC/EN 60529

Voltage supply

Permissible medium temperature range

PS: Design pressure

Serial number

Before mounting and commissioning the instrument,

ensure you read the operating instructions!

3. Safety

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