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Pump Control Example

The application is to control the level in a wet well 3 meters deep. It is required that :

» the level is displayed in meters

» 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

» the two pumps operate on a cumulative sequential loop, de-energized

under loss of echo

» low alarm is set at 0.4 m to protect the two pumps from cavitating

» the transducer is mounted 3.4 meters from the bottom of the wet well

» the span of level in the well is 3 m

» maximum fill rate is 1m / min, maximum draw rate is 0.2 m / min

» in the event of loss of echo, go into fail-safe low after 30 seconds to

protect pumps

» the transducer is the submersible type as there is a 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 "

.300", blanking distance, ( use factory setting )

P-7 enter "2", display max 2 digits after decimal

P-8 enter option "dE 9" relay 1 - pump function

(press "9" and

then "

" until "dE 9"

is displayed)

P-9 enter "1", relay 1 - pump ON

P-10 enter "

.5", relay 1 - pump OFF

P-11 enter option "dE 9" relay 2 - pump function

(press "9" and

then "

" until "dE 9"

is displayed)

PL-443 6 – 7

Milltronics MultiRanger Plus User Manual

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