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7
Technical Reference
7.6
Interface Description
•
Displacing (the interface) before a discharge:
See
8.2.1 Operating water interface on page
or
8.3.1 Operating water interface on page
220 and 221 Outlets
Processing in
STAND STILL
:
•
Could be closed or open.
Processing in other modes
•
Shall be open.
372 Inlet for discharge liquid.
Processing in
STAND STILL
:
•
Shall be closed.
Signal processing in
STARTING
:
•
Shall be closed.
Signal processing in
RUNNING
:
•
A discharge is initiated according to procedure
in “Operating Water Interface”.
•
After a discharge has been triggered the motor
current or bowl speed should be monitored
to indicate if there comes a current peak or a
sudden drop in speed. The absence of such a
signal indicates that the discharge has failed and
corrective action should be taken (e.g. trigger a
new discharge). Absence of a discharge may
result in problems due to solidification of the
sediment. That the current returns to original
value after discharge could also be supervised.
If current is much higher after the discharge this
might be an indication that the bowl has not
closed properly after the discharge.
•
For service purposes there should be a counter
to count number of discharges.
373 Inlet for make-up liquid.
Processing in
STAND STILL
:
•
Shall be closed.
Signal processing in
STARTING
:
•
Shall be closed.
Signal processing in
RUNNING
:
•
The separator bowl is closed according to
procedure in “Operating Water Interface”.
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