Xylem 704 PUMP CONTROLLER - Manual (Page 8)

8
1.All start / stop levels must be outside the interval in
which calculation takes place.
The flow calculation can only be carried out between the
lowest set start level and the highest set stop level with
a margin of sensor span/200.
2.The connected pumps must regularly run on their own
to obtain reliable flow measuring.
If the above mentioned conditions are not present the
following message will appear in the display, when
entering menu 8.0 is attempted:
PUMP FLOW NOT POSSIBLE
SEE THE MANUAL
This message will also appear if the pump settings are
changed, so the conditions are no longer present. If flow
calculation is needed again after this, the level must be
set so the conditions are present again.
If it is established that all stop / stop levels comply with
the above conditions, access is given to menus 8.1 to 8.5.
8.1 Flow calculation yes / no
Choose whether flow calculation is desired.
8.2 Level for volume: Stop
Set the level where known volume stops. If the control is
set for the filling function, the stop level is the highest
level. If it is set for emptying, this is the lowest level.
8.3 Level for volume: Start
Set the level for the known volume in this menu. If the
control is set for filling, the start level is the lowest level, if
it is set for emptying, this is the highest level.
8.4Size of the volume
At this point the known volume is keyed in, between start
and stop level. The resolution of the volume will reflect the
measurement accuracy of the pump controller.
8.5 Correction factor
It is possible to adjust a correction factor. As a starting
point it should be reset at 1.00. If heights or other similar
uncertain factors regularly occur, the flow can be adjusted
by means of control measuring.