Hach-Lange DR 2800 eco - Manual (Page 39)

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Standard Operations
5.2.7.1 Deactivation Password
1. Press Password in the ”Instrument Setup“ menu.
2. Use the alphanumeric keypad to enter the former Password
and confirm with OK.
3. Press Set Password.
4. Press OK for deactivating the former Password and return back
to the ”Password“ menu.
Note: Use this function to delete the former Password or to enter a new
one.