Watson-Marlow 520DuN IP66/NEMA 4X User Manual
25
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.
AUTO/MAN
: displays a screen offering three choices: manual control, ana-
logue control or network (RS485) control. Use the
UP
and
DOWN
keys to
make a choice. Press the
ENTER
key to confirm your decision. When started
under analogue or network control, the pump runs at the speed set by any
analogue or RS485 signal applied to the pump, and in the direction shown in
the display.
STOP
: has no effect if the pump is not running. If the pump is running, press-
ing
STOP
stops the pump. The display will continue to show the previous speed
and direction. The pump will return to this speed and direction when the
START
key is pressed again.
UP
: increases the speed shown on the display in minimum steps of 0.1 rpm
(unless the speed displayed is already the maximum allowed speed). If the
pump is then started by pressing the
START
key, it will operate at the new
speed. If the pump is running when
UP
in pressed, the change takes effect
immediately.
Note
: After a speed change, a screen showing the new rpm figure
and
the
new flowrate is displayed for four seconds before returning the user to the pre-
viously set manual mode main screen: rpm
or
flowrate.
DOWN
: decreases the speed shown on the display in minimum steps of 0.1
rpm. If the pump is then started by pressing the
START
key, it operates at the
new speed. The minimum speed possible is 0.1 rpm. If the pump is running
when
DOWN
is pressed, the change takes effect immediately.
Note
: After a speed change, a screen showing the new rpm figure
and
the
new flowrate is displayed for four seconds before returning the user to the pre-
viously set manual mode main screen: rpm
or
flowrate.
Note
: You can reduce the pump speed from 0.1 rpm to 0 rpm by a further
press on the
DOWN
key. The pump is still in the running state and the rotation
symbol will continue to move. Press the
UP
key to return the pump to the min-
imum speed.
DIRECTION
: toggles the direction of rotation shown on the display. If the
pump is then started by pressing the
START
key, it rotates in the new direc-
tion. If the pump is running when
DIRECTION
is pressed, the change takes
effect immediately.
