Watson-Marlow 520Du User Manual
Page 33
Watson-Marlow 520DuN IP66/NEMA 4X User Manual
33
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.
Measure the quantity of fluid dispensed. The pump displays its calculated dose,
based on previous calibration data. Use the UP and DOWN keys to adjust this
reading to match the measured volume. Press ENTER. The pump displays the
new head, tube and flow settings, and redisplays the main menu. Example fig-
ures are shown here.
Note: If the pump has been set to display flow rate in units of mass (see 18.8 Flow
units), as in this example, the pump displays a screen allowing you to confirm the
specific gravity of the duty fluid immediately before the final press on ENTER.
Note: Always recalibrate after changing pump tubes, fluid, or any connecting
pipework. It is also recommended that the pump is recalibrated periodically to main-
tain accuracy.
Note: If the pump power is cycled while flow rate is displayed, calibration is lost and
a warning is displayed.