EN
14235428.01 07/2018 EN/DE/FR/ES
12
WIKA operating instructions models RLT
The following table describes the 3-wire resistance measurement and
the expected measured values for the movement of the float, starting
from the float stop in the direction of the tank opening.
Resistance measurement
of the wire colours
Measured value
BN ― GN (R1)
Brown ― green
Resistance value rises proportionally with the
position of the float.
WH ― BN (R2)
White ― brown
Resistance value drops in inverse proportion
to the position of the float.
GN ― WH (Ri)
Green ― white
Overall resistance of the measuring chain
remains almost constant, irrespective of the
position of the float
WARNING!
Ensure that the functional check does not start any
unintended processes.
5.2 Mounting preparation
Ensure that the sealing faces of the vessel or level sensor are clean and
do not show any mechanical damage.
5.3 Mounting
■
Observe the torque values of screws specified in pipefitting work.
■
In the selection of the mounting material (sealings, screws, washers
and nuts), take the process conditions into account. The suitability
of the sealing must be specified with regard to the medium and
its vapours. In addition, ensure it has corresponding corrosion
resistance.
■
The guide tube
should not be inclined more than a maximum of
30° to the vertical.
■
Mount the level sensor correctly for the design of the process
connection.
5. Commissioning, operation
Summary of Contents for RLT-1000
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Page 62: ...FR 14235428 01 07 2018 EN DE FR ES 62 WIKA mode d emploi types RLT...
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