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Watson-Marlow 620DuN and 620Du User Manual 27
16 PIN-secure process protection
The 620DuN and 620Du feature PIN-secure process protection. This allows the
pump to be configured to suit the application, and for the setup to be protect-
ed by two levels of PIN code.
The main code gives access to Calibrate, Setup, Direction change and
Keypad lock.
The secondary (User) code permits Calibrate, Direction change and Keypad
lock but bars Setup change.
If either code is used in conjunction with Keypad lock, all keys are disabled
except STOP and START.
To activate and set a security code, see 18.22 Security code.
If the main code is lost or forgotten: The Setup main security code can be
bypassed by entering a special key sequence; all codes can then be cancelled
and reset. Contact Watson-Marlow or your distributor for details.
Menu option
or keypress
With Main
code set
With User
code set
Code set and
keypad locked
Menu (SHIFT, 7) Available Available Not available
Calibrate Available Available Not available
Accept Available Available Not available
Change Main PIN needed
Main PIN or User
PIN needed
Not available
Setup Main PIN needed
Main PIN needed;
User PIN invalid
Not available
Cal (SHIFT, 8) Available Available Not available
Accept Available Available Not available
Change Main PIN needed
Main PIN or User
PIN needed
Not available
Max (SHIFT, 4) Available Available Not available
Dir (SHIFT,1) Main PIN needed
Main PIN or User
PIN needed
Not available
Auto (SHIFT, 9) Available Available Not available
Man (SHIFT, 6) Available Available Not available
Up Available Available Not available
Down Available Available Not available
SHIFT and Up Available Available Not available
SHIFT and Down Available Available Not available
Start Available Available Available
Stop Available Available Available
Enter Available Available Not available
MemoDose Available Available Available
Keypad lock Main PIN needed
Main PIN or User
PIN needed
Main PIN or User
PIN needed
Auto-restart Available Available Available
DuN, Du
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