Watson-Marlow 620U - Manual (Page 44)

Watson-Marlow 620UN, 620U, 620SN, 620S User Manual 44
16.8 Set minimum allowed speed
The minimum allowed speed of the drive defaults to 0rpm. It is possible to set this
limit at any speed up to 264rpm, as long as the maximum speed is at least 1rpm
greater.
UN, U, SN, S
In the second screen of the Setup menu select Set min speed using the UP
and DOWN keys. Press ENTER to confirm your choice.
The pump displays a screen allowing the user to set the minimum speed of the
pump equal to or higher than the minimum available. Use the UP and DOWN
keys to set the minimum allowed speed and press ENTER to confirm the fig-
ure.
The pump returns the user to the second screen of the Setup menu.
Note: Minimum allowed speed limits speed under manual or analogue control.
16.9 Scrolling
In use, the pump’s speed can be set, up to the maximum allowed speed and down
to the minimum allowed speed, by pressing the UP and DOWN keys.
In the Scrolling section of the Setup menu, the UP and DOWN keys allow the speed
options to be set in increments of the user’s choice: one-tenth of a revolution per
minute; one half of a revolution per minute; one, two, five or ten revolutions per
minute (or their equivalents in flow rate if the pump has been configured to display
its performance in units of flow). Each press on UP, for example, offers a speed one
increment greater than the current speed.
Note: For 0.1rpm, 0.5rpm and 1rpm settings, the increments increase progressive-
ly as long as the UP or DOWN key is continually held down.
UN, U, SN, S