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
GB
D
F
Operating instructions level sensors
GB
Model RMG Page 3 - 9
Betriebsanleitung Niveau-Messwertgeber
D
Typ RMG Seite 11-17
Mode d‘emploi indicateurs régulateur de niveau
F
Type RMG Page 19-25
2
WIKA operating instructions level sensors model RMG
13442163.01 06/2010 GB/D/F
Contents
Contents
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
GB
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
3
1. Functional description ... 3. Assembly
1. Functional description
GB
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.
4
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 retted 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 qualied 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.
GB
WIKA operating instructions level sensors model RMG
13442163.01 06/2010 GB/D/F
5
unten
oben
100%
0%
blau
braun
schwarz
R2
R1
Ri
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
GB
be connected in series.
blau braun schwarz
oben
100%
blau
R2
braun
R1
unten
Innenschaltbild Potentiometer Ersatzschaltung
0%
schwarz
Ri
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.
+
R
I
-
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
A
12 - 30V DC
6
WIKA operating instructions level sensors model RMG
13442163.01 06/2010 GB/D/F
6. Function test
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.
GB
WIKA operating instructions level sensors model RMG
13442163.01 06/2010 GB/D/F
7
7. Notes / 8. Wiring diagramm ...
7. Notes
GB
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
8
WIKA operating instructions level sensors model RMG
13442163.01 06/2010 GB/D/F
Illustration of the principle
GB
WIKA operating instructions level sensors model RMG
13442163.01 06/2010 GB/D/F
9
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