With Handterminal, see
Page 37, Section 3.3
C
−
LRV lift control valve
Installation and commissioning
300−I−9010212−E−10/08.08
4.3.10
Setting the mechanical null point
The null point is factory−set.
This can be checked with the Handterminal (or PC). If, on commission-
ing, the reading is outside the range ±0.05V, then the null point must be
reset.
Setting the null point
1.
Close the ball valve
2.
Connect the Handterminal to the C−DELCON and press key 3 on
Handterminal => null point or feedback value will be displayed
3.
Using a 3mm Allen key, slacken the adjusting/clamp screw (
14
) a
little
4.
Remove Allen key (it has a magnetic influence)
5.
Hold the feedback sensor by the plug and move it axially until the
feedback reading is less than
±
0.05V
6.
Tighten adjusting/clamp screw (
14
)
7.
Return to RUN mode by pressing the
↑
and
↓
on the Handterminal
simultaneously.
8.
Open the ball valve.
The null point is now correctly set
Checking null point after maintenance work
The error memory of the C−DELCON should be checked each time
maintenance work is carried out. If there is a warning with regard to null-
point deviation or, if the actual value for the null point is outside the
range ±0.2V, then the null point has to be reset.
