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Measure the quantity of fluid dispensed. The pump displays its calculated dose,
based on previous calibration data. Use the numeric keys to adjust this reading
to match the measured volume. Press ENTER. The pump briefly displays the
new head, tube and flow settings, and displays the main running screen.
Example figures 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: if calibration was entered by pressing CAL (SHIFT, 8) from the main running
screen, the pump redisplays the main running screen and restarts immedi-
ately without waiting for a further command.
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.
18 Setup
Entry to the Setup menu is from the Main menu and can be limited to users who
correctly enter a three-digit security code. If a security code has been set, selecting
Setup and confirming with the ENTER key causes the pump to display the Security
code entry sequence. See 18.22 Security code. If no security code has been set, the
pump displays the first of seven screens containing the Setup menu.
The Setup menu
Make a selection using the UP or DOWN keys and press ENTER to confirm your
choice.
The Setup menu occu-
pies seven screens. The
first two are shown
here.
To move from one
screen to subsequent
screens, repeatedly
press DOWN. Each item
is highlighted in turn until the last item on the screen is highlighted.
A further press on the DOWN key displays the next screen of the
menu, with the first item highlighted.
Follow the reverse procedure using the UP key to move to an item on
a previous screen of the menu.
Watson-Marlow 620DuN and 620Du User Manual 31
DuN, Du