WIKA FLM-CA Manuel utilisateur

Operating instructions

Betriebsanleitung

Magnetostrictive level transmitter, models FLM-CA, FLM-CM

Magnetostriktiv-Füllstandstransmitter, Typen FLM-CA, FLM-CM

Mounting flange, spherical float from

stainless steel, model FLM-CA

Mounting thread, cylinder float from

stainless steel, model FLM-CM

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Operating instructions magnetostrictive level transmitter, model FLM-CA, FLM-CM

Operating instructions models FLM-CA, FLM-CM

Page

3 - 26

Betriebsanleitung Typen FLM-CA, FLM-CM

Seite

27 - 50

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!

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Operating instructions magnetostrictive level transmitter, models FLM-CA, FLM-CM 3

Contents

1. General information 4

2. Design and function 4

3. Safety 7

4. Transport, packaging and storage 9

5. Commissioning, operation 10

6. Faults 20

7. Maintenance and cleaning 21

8. Dismounting, return and disposal 23

9. Specifications 24

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Operating instructions magnetostrictive level transmitter, models FLM-CA, FLM-CM4

1. General information

■

The magnetostrictive level transmitters 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 certified 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 modifications.

■

Further information:

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

- Relevant data sheet: LM 20.04 (FLM-CA)

LM 20.05 (FLM-CM)

2. Design and function

2.1 Description

The models FLM-CA and FLM-CM high-accuracy level transmitters are used for the

continuous measurement of the level of liquid media in vessels. The measurement

procedure used exploits the physical effect of magnetostriction and is largely independent

of the temperature. It is used, especially, where very precise level measurements are

required, such as in the chemical industry.

In these operating instructions, the FLM is described with cable connection on the side of

the probe head. As cable connection, an M12 cable gland (also with M16 adapter), an M12

connector or an M20 or ½ NPT female thread are possible. As a further variant, there is an

FLM with an M12 connector on the probe head cover.

1. General information / 2. Design and function

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Operating instructions magnetostrictive level transmitter, models FLM-CA, FLM-CM 5

The FLM-Cx emits a 4 … 20 mA output signal, which is configured via buttons within the

probe head, or a digital output signal as HART®protocol.

Probe lengths of 100 mm to 6 m, as “Flex version” up to 10 m, and also various

temperature and pressure ranges are possible.

Available versions:

■

With screw-in body, welded or for step-free positioning

■

With flange process connection

■

For mounting on a bypass with magnetic float

■

With 90° angled probe head

■

With 6 mm guide tube

■

With 6 mm guide tube and short cable bushing

2.2 Construction and principle of operation

The construction of the model FLM-Cx level transmitter is illustrated in the version with

screw-in body. In the probe head of the level transmitter are located the connection

terminals and the adjustment buttons protected by the cover .The electrical connection

is made via an M16 x 1.5 cable gland or M12 plug connection on the top of the probe

head and the ground connection at the bottom of the probe head (see chapter 5.1

“Mounting” and 5.3 “Adjustment”).

On the guide tube , for highly-adjustable mounting in the vessel, there is a screw-in

body (compression fitting) or, for fixed mounting, a flange (not shown).The float is

used for the continuous measurement of the product filling height or interface layer and is

held on the guide tube by an adjusting collar .

The “BLM for bypass fitting” version is delivered without process connection and float.

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







2. Design and function

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Operating instructions magnetostrictive level transmitter, models FLM-CA, FLM-CM6

The measurement procedure shown in the following figure exploits the physical effect of

magnetostriction and is largely independent of the temperature. In the guide tube, a wire 

from magnetostrictive material is stretched. Via the sensor electronics, current pulses 

are sent through the wire, which generate a circular magnetic field . A magnet , which

is built into the float, acts as the level pick-up. Its magnetic field magnetises the wire axially.

Through the interference of the two magnetic fields, in the area of the float magnet, a

torsion wave is generated, which runs in both directions along the wire. One wave runs

directly to the probe head, the other is reflected off the lower end of the guide tube.The

time between the sending of the current pulse and the arrival of the wave at the probe head

is measured. From the time elapsed, the float position is determined.

2.3 Scope of delivery

Cross-check scope of delivery with delivery note.

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







2. Design and function

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Operating instructions magnetostrictive level transmitter, models FLM-CA, FLM-CM 7

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 efficient and

trouble-free operation.

3.2 Intended use

Magnetostrictive level transmitters are used exclusively for the continuous measurement of

the level of liquid media in vessels.

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

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.

3.3 Improper use

Improper use is defined as any application that exceeds the technical performance limits.

WARNING!

Injuries through improper use

Improper use of the instrument can lead to hazardous situations and injuries.

▶

Refrain from unauthorised modifications to the instrument.

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. Safety

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Operating instructions magnetostrictive level transmitter, models FLM-CA, FLM-CM8

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.

3.5 Personnel qualification

WARNING!

Risk of injury should qualification be insufficient

Improper handling can result in considerable injury and damage to property.

▶

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.

Special operating conditions require further appropriate knowledge, e.g. of aggressive

media.

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

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Operating instructions magnetostrictive level transmitter, models FLM-CA, FLM-CM 9

3.7 Labelling, safety marks

Product label

Model

Model code

Serial number

Article number

Tag no.

Electrical data, IP ingress protection

Before mounting and commissioning the instrument, ensure you read the

operating instructions!

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”.

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).

Level sensor FLM

Type:

Ser. No.:

Art. No.:

Tag. No.:

IP68 max. DC 15 ... 30 V

4 ... 20 mA

WIKA Alexander Wiegand SE & Co. KG

Alexander-Wiegand-Strasse 30

63911 Klingenberg

WIKA Alexander Wiegand SE & Co. KG

Alexander-Wiegand-Strasse 30

63911 Klingenberg

Level Sensor ???????

ype: ???-????????????????

????????????????

4-20 mA

TÜV 18 ATEX 225120 X

I 1/2 G Ex ia IIC T6…T3 Ga/Gb

II 1 D Ex ia IIIC T160°C Da

0637

Ui=<30V; Pi=<1W; li=<200mA; Ci=<10nF; Li=<20µH

Bj.:????













3. Safety / 4. Transport, packaging and storage

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Operating instructions magnetostrictive level transmitter, models FLM-CA, FLM-CM10

5. Commissioning, operation

DANGER!

Risk of injury due to improper use

Work on containers involves the danger of intoxication and suffocation.

▶

No work is allowed to be carried out unless by taking suitable personal

protective measures (e.g. breathing apparatus, protective clothing etc.).

▶

Work on the instrument must only be carried out by trained skilled

personnel.

5.1 Mounting

■

During mounting, ensure that the guide tube is not bent and that the float is not

subjected to shock loads.

■

The installation of the level transmitter in areas with strong external magnetic fields is

not permitted, since this will impede the correct measured value determination.

■

The level transmitter can also be installed in the vessel from below. If the vessel is also

pressurised, then the maximum length of the level transmitter is 2 m.

Guide tube length

Insertion length

Guide tube

Screw-in body Flange Mounting on bypass

Probe head Probe head

Neck tube

Flange

Screw-in

body

112

116

Float Float

Adjusting

collar

Adjusting

collar

Guide tube

5. Commissioning, operation

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