Hach-Lange DR 3800 User Manual - Manual (Page 34)

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Standard Operations
3. Press Off to deactivate the settings of the Security List.
4. Press OK to return to Instrument Setup.
Note: Use this function to delete the former Password or to enter a new
one.
5.2.8 Select color
Select one of the four preset color palettes in the Select Color
menu.
1. Press Select color in the Instrument Setup.
A color chart list will appear.
2. Select a color category to highlight the color for the display
background.
3. Press OK to return to Instrument Setup.