Hach-Lange DR2800 eco - Manual (Page 49)

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Standard Operations
4. Press Options>More>Reagent Blank.
5. Press On to highlight the Reagent Blank function.
6. The concentration shown on the key is the measured value of
the reagent blank. To use this value for more analyses of this
parameter, press OK.
7. If the measurement does need to be saved, press the key and
use the alphanumeric keypad to enter a previously recorded
reagent blank value.
8. Press OK.
Note: The Reagent Blank function is deactivated when the measurement
program is left. To use the same blank value later for other tests using the
same reagent lot, enter the value per step
7 .
Note: The results calculated using the reagent blank value must lie within
the limits of the measuring range of the test/method.
Note: The reagent blank icon is shown in the result display (see arrow)
when the function is active.
5.4.8 Analysis of samples
1. Press Stored Programs and select a program.
2. Insert the blank cuvette/cell into the cuvette/sample cell holder.
3. Press Zero.