Waukesha Cherry-Burrell
Maintenance
April 2008
95-03083
Page 33
Set-up/Operation
After mounting, wiring and adjustment, check whether the unit operates correctly. If possible, put the valve into all
available positions and check if the unit switches correctly and if the operations are correctly indicated by the LED’s.
Indication by LED for the different operating modes
The sensor has 3 operating modes which the sensor automatically generates depending on the programming:
•
Mode A: For valves with 2 operating positions. The wear of the valve seals is monitored.
•
Mode B: For valves with 3 operating positions. The position Seat lift (seat) is between the positions Closed and Open.
•
Mode C: For valves with 3 operating positions. The position seat lift (seat) is outside the positions Closed and Open.
•
When the LED at the zones marked in grey lights up,
the output corresponding to this state is closed
(switched). At the zones marked in white and outside
the detection range (zones hatched diagonally), all
outputs are open (not switched).
•
All modes are also available when the open and
closed positions are inverted. The sensor detects this
automatically, and the assignment of the switching
characteristics is carried out automatically.
•
The open and closed zones are placed near the edge
(the teach positions are at the edge of the zones). The
seat zones are placed in the middle, symmetrically
around the teach position.
•
To monitor the
seal
, the open and closed zones in
mode A are only 1.5 mm in width. The zones
open+seat and seat are immediately adjacent.
In these zones both the outputs "open" and "seat" and
the outputs "closed" and "seat" are switched simulta-
neously.
This signals wear of the valve seal!
•
In mode A, only the closed and open positions can be
adjusted. Do not adjust the seat lift; please skip this
program step by pressing the Pos. button. The sensor
then automatically generates mode A.
Figure 51: Modes A-C