Mounting Preparation - WIKA RLT-1000 Betriebsanleitung

5. Commissioning, operation
Resistance measu-
rement of the wire
colours
EN
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 resis-
tance.
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.
If the opening of the process connection is too small for the float, the
■
float must be removed before mounting.
- Before removal, mark the position of the float limitation  with a
waterproof pen
- Mark the mounting position of the float (e.g. "Up")
12
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
WARNING!
Ensure that the functional check does not start any uninten-
ded processes.
WIKA operating instructions models RLT