Measured Value; Mounting Preparation - WIKA RLT-1000 Manual De Instrucciones

5. Commissioning, operation
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.
EN
Resistance measurement
of the wire colours
BN ― GN (R1)
Brown ― green
WH ― BN (R2)
White ― brown
GN ― WH (Ri)
Green ― white

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.
12
WARNING!
Ensure that the functional check does not start any
unintended processes.

Measured value

Resistance value rises proportionally with the
position of the float.
Resistance value drops in inverse proportion
to the position of the float.
Overall resistance of the measuring chain
remains almost constant, irrespective of the
position of the float
WIKA operating instructions models RLT