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Watson-Marlow 620DuN and 620Du User Manual 49
18.22 Security code
Access to the pump’s Setup and Calibration menus, direction control and keypad lock
can be restricted to those who correctly enter a three-digit security code: the main
code. A secondary user code can be set, which permits PIN access to calibration,
direction and keypad lock, but blocks access to Setup. See 18 Setup, 17 Calibrate,
14.3 Direction and 14.4 Keypad lock.
The codes must first be set.
In the sixth screen of the Setup menu select Security code using the UP and
DOWN keys. Press ENTER to confirm your choice.
If no code has been set, a screen is displayed inviting the user to set a main
code. Press ENTER to proceed (or STOP to return to the sixth screen of the
Setup menu).
If a main code has been set, a screen is displayed inviting the user to set a
new main code, to set a user code (or a new user code if one has already been
set), or to cancel all codes. Choose Set main code, Set user code or Cancel
codes using the UP and DOWN keys. Press ENTER to confirm your choice.
If you chose Cancel codes, any codes previously set are cancelled and access
to the pump is not restricted.
If you chose Set main code or Set user code, the pump displays a screen
with three blank spaces for digits and the instruction “Enter new code”. Use the
numeric keys to enter three digits. The pump displays a similar three-digit
entry screen and the instruction “Confirm code”.
Repeat the digit-entry sequence.
If the second three-digit code entered differs from the first, or if the digits cho-
sen as a user code are the same as those already set as a main code, the
pump briefly displays an error message and redisplays the set code options
screen.
If the codes tally and, for a user code, if there is no clash with a previously set