Watson-Marlow 720UN and 720SN User Manual
23
14 Manual operation
14.1 Keypad functions 720UN
All settings and functions of the pump in manual mode are set and controlled by
means of key-presses. Immediately after the start-up display sequence detailed
above, the manual mode main screen will be displayed. The currently selected rota-
tion direction is indicated on the display by a clockwise or counter-clockwise seg-
mented arrow. If an exclamation
mark (
!
) shows, it indicates that
Auto-restart is on (see 14.10
Auto-
restart
). If a padlock icon (
)
shows, it indicates that Keypad lock
is on (see 14.5
Keypad lock
).
Note
: A number of the controls
listed below are shortcuts to com-
mands which are also available
through the Main menu. See 15
Main menu
.
A brief single press on each key
triggers a beep sound (if enabled -
see 14.6
Keypad beep
) and causes
the pump to function as follows:
START
: starts the pump at the speed and in the direction shown on the display.
The rotation symbol will become animated to confirm that the pump is operat-
ing.
If the pump is running when
START
is pressed, it causes the information shown
on the manual mode main screen to cycle from revolutions per minute, to
flowrate in a choice of units (via a warning screen if flowrate has not been cali-
brated and if this is the first cycle since power-up) to rpm and flowrate. An ex-
ample is shown here. The default can be altered from within the Setup menu
(see 16.3
Display
).
MAX
: while pressed,
MAX
operates the pump at the maximum allowed speed
and in the direction shown on the display. When released, the pump returns to
its previous status.
Note
: Priming can be achieved by pressing the
MAX
key until fluid flows
through the pump and reaches the point of discharge, and then releasing the
MAX
key.
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