Hach-Lange DR 3900 User Manual - Manual (Page 118)

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Expanded programs
6.8.4.1 AQA Standard configuration
The working method, photometers, and accessories can be
checked by the analysis of a standard solution.
1. Press AQA Standard
A screen with standard sets opens (not available on all
models), alternatively an individual standard can be defined.
2. Select Options>New to define a new standard.
Note: If a standard has not yet been defined, in some models the
alphanumeric keypad is displayed directly.
3. Enter the name of the standard solution and confirm with
OK.
4. Enter the concentration unit and confidence interval by
touching the corresponding fields.
5. Press OK to confirm the entry.
6. All the standard solutions entered are shown on the screen.
7. Select Options>Edit to alter the settings.
8. Select Options>Delete to delete the standard. Select
Options>New to define a new standard.