Watson-Marlow 520DUN User Manual page 33

Calibration dose
The pump offers to run a calibration dose. Use the UP and DOWN keys to
choose Yes or No. Press ENTER to confirm. Examples are shown here.
If No is selected after a tube selection has been made (see Tube above), the
pump briefly displays a confirmation screen showing current head, tube and
flow settings, and redisplays the main menu.
If Calibration dose is selected or if Yes is selected after a tube selection has
been made (see Tube above), the pump displays the speed and direction at
which it was last running in manual mode or to which it has just been set and
invites the user to press START.
Note: it is possible at this point to change the direction of rotation using the
DIRECTION key, and the change the speed of rotation using the UP and
DOWN keys, up to the pump's maximum speed or any (lower) maximum avail-
able speed which has previously been set. See 18.13 Set maximum speed.
Put a measuring container at the pump outlet. Press START. The pump runs
for 4 minutes, displaying an information screen for 15 seconds and a further
information screen for the rest of the 4 minutes. You may stop the calibration
dose at any time with the STOP key - but allow the pump to run as long as
possible to obtain the most accurate calibration. A minimum of 15 seconds is
recommended.
Watson-Marlow 520DuN IP66/NEMA 4X User Manual 33