WIKA FLR User Manual [en, de, fr]

Operating instructions Betriebsanleitung Mode d´emploi

Level sensors model RMG

Niveau-Messwertgeber Typ RMG

Indicateurs régulateur de niveau type RMG

Level sensor with reed switch chain technology,

model RMG, ange connection

Operating instructions level sensors

Model RMG Page 3 - 9

Betriebsanleitung Niveau-Messwertgeber

Typ RMG Seite 11-17

Mode d‘emploi indicateurs régulateur de niveau

Type RMG Page 19-25

WIKA operating instructions level sensors model RMG

13442163.01 06/2010 GB/D/F

Contents

1. Functional description 4

2. Area of application 4

3. Assembly 4

4. Electrical connection 5

5. Commissioning / function test 6

6. Maintenance 7

7. Notes 8

8. Protective RC-Modules 9

WARNING!

This symbol warns you against actions that can cause injury to people or damage to the instrument.

WIKA operating instructions level sensors model RMG

13442163.01 06/2010 GB/D/F

1. Functional description ... 3. Assembly

1. Functional description

The level transmitter model RMG is used for remote measuring of the level of liquid media.

It operates according to the oat principle with magnetic transmission

in three-wire potentiometer circuit. A reed measuring network (reed contacts + resistors) built into the slip pipe (5) is actuated by a permanent magnet built into the oat (6). This provides a proportional resistance signal for evaluation. Evaluation may take place for example with a series-connected resistance transmitter.

2. Area of application

Level transmitters serve exclusively for monitoring the level of liquid media. All materials which come into contact with the media must be suitably resistant. The medium to be monitored may not be heavily contaminated. It may not have a tendency to crystallize.

The level transmitters must be operated on safety barriers or an intrinsically safe control circuit for use in „e“ areas of zone 1 or 2.

3. Assembly

Install WIKA level transmitters according to their model (ange or thread

(3)). Fit a suitable gasket (4) for sealing. Make sure they are installed in the right position.

WIKA operating instructions level sensors model RMG

13442163.01 06/2010 GB/D/F

4. Electrical connection

Note

The WIKA level transmitters only works correct when mounted in vertical position. The max. deviation from the vertical is ± 30° and must not be exceeded.

The oat (6) must be removed before installing the transmitter in openings with a diameter smaller than the diameter of the oat. The oat must be marked with „top“. The oat should be retted inside the tank after installing the level transmitter and the set collar (7) xed.

4. Electrical connection

Note

All cabling and electrical connections must be carried out in accordance with the regulations applicable in the country where the equipment is

installed and by personnel qualied to do.

Current spikes may occur Malfunctions by using longer cable lengths or if the lines are laid together with energy lines. A screened cable must be used and earthed at one end.

WIKA operating instructions level sensors model RMG

13442163.01 06/2010 GB/D/F

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4. Electrical connection / 5. Maintenance

The level transmitter must be connected according to the wiring diagram printed on the transmitter and wired with the electronic evaluation unit to

be connected in series.

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The cable bushing (2) must then be sealed and the lid of the connection enclosure (1) closed tightly. The transmitters with built-in head transducer must be connected as shown in the wiring diagram.

See the respective wiring diagram for the terminal wiring.

5. Maintenance

The level transmitters operate free of maintenance and wear when used properly.

Under extreme operating conditions, the transmitter must be eye-checked within the scope of the necessary revisions.

4 - 20mA

12 - 30V DC

WIKA operating instructions level sensors model RMG

13442163.01 06/2010 GB/D/F

6. Function test

A function test can only be carried out when the level sensor has been removed.

■

Disconnect the cable

■

Connect an ohmmeter to two wires

■

Move the oat by hand from Min. to Max.

■

The displayed resistance value changes continuously depending on the connected wire colours (Tab. 1):

black-brown (R1) blue-brown (R2) black-blue (Ri)

Resistance value increases in proportion to

the height of the oat.

Resistance value drops from the value of the total resistance inversely proportionally to the

height of the oat.

Indication of the total resistance (Ri)

Table 1

The value of the resistance chain is given on the tag plate mounted at the level transmitter.

WIKA operating instructions level sensors model RMG

13442163.01 06/2010 GB/D/F

7. Notes / 8. Wiring diagramm ...

7. Notes

Do not operate level transmitters in the immediate vicinity of strong

electromagnetic elds. (Distance away at least 1 m).

Only operate in connection with suitable transducers. Safety barriers or licensed measuring transmitters must be used for operation in „e“ zone 1 o 2.

For operation at safety barriers the total resistance of the reed

measuring chain (Ri) must be at least 40 kΩ.

The level transmitter may not be exposed to any heavy mechanical stress.

8. Wiring diagramm two wire head mounted transmitters

WIKA operating instructions level sensors model RMG

13442163.01 06/2010 GB/D/F

Illustration of the principle

WIKA operating instructions level sensors model RMG

13442163.01 06/2010 GB/D/F

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