Hach Pocket Colorimeter II Single Wavelength Manuel D'utilisation page 20

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7. Remove the sample
cell from the cell holder.
10. Clean the prepared
sample cell.
20 English
8. Prepare the
sample: Fill a second
sample cell with 10 mL
of sample.
11. Insert the prepared
sample into the cell
holder in the correct
orientation. Refer to
Figure 7 on page 17.
9. Add the reagent to
the second sample cell.
Wait the specified
reaction time for full
color development if
applicable.
12. Install the
instrument cap over the
cell holder.