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Watson-Marlow 620DuN and 620Du User Manual 20
14 Manual operation
14.1 Keypad functions
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. If a padlock icon
( ) shows, it indicates that
Keypad lock is on.
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.
Note: SHIFT gives access to func-
tions which appear on the upper
part of numeric keys. To access the
MAX function, for example, press
SHIFT once and release it. A sym-
bol appears in the bottom left of the display to indicate that the next keypress will
be SHIFTed. Press 4 (MAX).
A brief single press on each key triggers a beep sound (if enabled - see 14.5 Keypad
beep) and causes the pump to function as follows:
START: starts the pump at the speed and in the direction shown on the dis-
play. The rotation symbol will become animated to confirm that the pump is
operating.
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
calibrated and if this is the first cycle since power-up) to rpm, flowrate and Run
time. An example is shown here. The default can be altered from within the
Setup menu (see 18.3 Display).
MAX (SHIFT, 4): while pressed, MAX (SHIFT, 4) 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 MAX (SHIFT, 4) until fluid flows
through the pump and reaches the point of discharge, and then releasing MAX
(SHIFT, 4).
DuN, Du