PULSAR MEASUREMENT
91
PUMP DUTY
DESCRIPTION
5= Duty backup and assist
First pump comes on, if it cannot cope, it goes off
and next pump comes on (duty backup). This
continues until the last pump comes on and if it
cannot cope the first pump comes back on to assist
the last pump (duty assist) if the level continues to
rise all other pumps will come on (assist) in turn
until the level decreases to the pump off points.
Each pump has its own setpoints, (P2
1
3, 2
2
3, 2
3
3,
2
4
3, 2
5
3, 2
6
3 & P2
1
4, 2
2
4, 2
3
4, 2
4
4, 2
5
4, 2
6
4).
The
third parameter
for each relay determines the pump group. You can
have two groups of pumps, and all similar duties within that group will
operate together.
P212, P222, P232, P242, P252, 262 - Relay Pump Group
By
default
, all pump groups are set to
1
, but if you want to have another
group, then set this parameter to 2, for each pump relay that should operate
together as part of a second group.
The
fourth parameter,
and the
fifth parameter
for each relay set the
pump
“
ON
” and “
OFF
” points, which are entered in
Measurement units
P104
. For
pump down
the
“
ON
” is set
higher than
“
OFF
”. For
pump up
then “
ON
” is set
lower than
“
OFF
”. See the appropriate
pump duty,
function
table (
P212, 222, 232, 242, 252, 262)
for further information.
P213, P223, P233, P243, P253, 263 - Relay Setpoint 1
This
parameter determines the “
ON
” point of the pump.
P214, P224, P234, P244, P254, 264 - Relay Setpoint 2
This parameter determines the “
OFF
” point for the pump.
Important Notice
The pumps are started and stopped at the “ON” and “OFF” setpoints. To
pump down
(reduce level) then set “ON” higher than “OFF”. To
pump up
(increase level) then set “ON” lower than “OFF”.
