Watson-Marlow 323Dz User Manual
Page 27
Watson-Marlow 323Dz User Manual
27
Watson-Marlow 323Dz User Manual
27
The display asks the user if he wishes to run a calibration dose. To obtain the
most precise calibration, select Yes. Select No if you wish to use the pre-pro-
grammed flow data and return to the main menu via a summary of the current
speed and flow settings. Press RETURN.
If you choose to run a calibration dose, the pump displays its current direction
and rotation speed. You may change pump rotation direction and speed using
the DIRECTION and UP and DOWN keys.
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 infor-
mation 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 recom-
mended.
Measure the quantity of fluid dispensed. The measurements must be in millil-
itres for calibration and dosing. The pump displays its calculated dose volume,
based on previous calibration data. Use the UP and DOWN keys to adjust this
reading to match the measured volume. Press RETURN. The pump displays the
new head, tube and flow settings, and redisplays the main menu. Example fig-
ures are shown here.
It is also possible to re-calibrate the pump during a batch run. (See 15.4 Dose.) Re-
calibration allows fine tuning of basic calibration.
If a re-calibration differs by more than 25% from the original calibration, the re-cal-
ibration value will be ignored. Another full calibration is required to change a dose size
by more than 25%.