•
to start/stop two constant speed pumps -
start pump 1 at 1 m level
start pump 2 at 2 m level
stop both pumps at 0.5 m level
•
two pumps operate on a cumulative sequential loop, de-energized under
loss of echo
•
low alarm be set at 0.4 m to protect the two pumps from cavitating
•
the transducer be mounted 3.3 meters from the bottom of the wet well
•
the span of level in the well be 3 m
•
max. fill rate be 1 m/min, max. draw rate be 0.2 m/min
•
in the event of loss of echo, go into fail-safe low after 30 seconds to protect
pumps
•
the transducer be the submersible type as there is possibility of flooding
select:
P-1 enter option “1”, units in meters
advance to:
P-2 enter option “1”, material level
P-3 enter “3.3”, empty distance to transducer
P-4 enter “3”, span
P-5 enter “0.3”, near blanking distance, 3.3 m - 3.0 m = 0.3 m
P-7 enter “2”, display max. 2 digits after decimal
P-8 press and then until “ d E 9” is displayed
enter option “dE 9”, relay 1 - pump function
P-9 enter “1”, relay 1 - pump ON
P-10 enter “.5”, relay 1 - pump OFF
P-11 press and then until “dE 9" is displayed
enter option “dE 9”, relay 2 - pump function
P-12 enter “2”, relay 2 - pump ON
P-13 enter “0.5”, relay 2 - pump OFF
P-14 enter option “1”, relay 3 - alarm function
P-15 enter “0.4”, relay 3 - alarm ON
P-16 enter “0.45”, relay 3 - alarm OFF
deadband = 0.05 m, arbitrary setting
P-23 enter option “1”, using submersible transducer
P-37 enter “1”, convert display (x1)
P-68 enter “1”, fill damping 1 m/min
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9
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PL-399 6 – 9
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