IFM LK81 Manuel De L'utilisateur page 36

Step Programming
example the mounting situation is below the minimum
distance), an error message is displayed (→ page 39,
operating and error messages).
When an OP adjustment is not possible please check the
position of the OP. The OP may be too close to the
mounting adapter or to other metal objects, or the OP
may be covered by the medium.
If the tank is very full, empty it a little or (if possible)
increase the OP value.
The sensor can start its operation only after empty adjustment. If it is not
carried out, the unit will not change into the operating mode,
displayed.
Furthermore, empty adjustment must be carried out each time when
changing a sensitive parameter (setting to the medium, position of the
overflow switch point). If the sensor detects relevant changes,
displayed.
If the mounting situation (height, position) or grounding (e.g. length of
the earthing cable) is changed, it is also absolutely necessary to make a
new empty adjustment to ensure a correct function of the overflow
protection. Caution: In this case empty adjustment is not required by
the sensor by displaying
The setting values for OFS, the setting range for SPx and rPx and the
setting values for OP are indicated in the following tables.
Please note: The values for OP, SPx and rPx apply to OFS = 0; for OFS
> 0 they increase by the set OFS value.
Setting range for OFS
Setting range
in steps of
36
LK8122
cm inch
0...78 0...30.8
0.5 0.2
!
LK8123
cm inch
0...57 0...22.4
0.5 0.2
Parameter
LK8124
cm inch
0...186 0...73
1 0.5
is
is