Hach Pocket Colorimeter II Instruction Manuals page 95

9. Insert the reagent blank or deionized water into the cell holder. Cover the
blank with the instrument cap.
10. Press the
READ/ENTER
value for "S0".
11. Remove the sample blank. Press the
the
READ/ENTER
Note: Press the
change the number.
12. After completing entry of the first standard value, press the
The display will show "A1".
13. Insert the first reacted standard solution into the cell holder. Cover the
prepared standard with the instrument cap.
14. Press the
READ/ENTER
value for S1.
15. The calibration is complete with two points. If additional standards are
required, press
steps 11–14 to enter additional standards.
key. The meter will measure and display the absorbance
key, then enter the first standard value.
key to move from digit to digit. Use the
READ/ENTER
key. The meter will measure and display the absorbance
until "Add" appears on the display. Repeat
ZERO/SCROLL
User-Entered Calibration,
ZERO/SCROLL
2—19
continued
key. "S1" will appear. Press
ZERO/SCROLL
READ/ENTER
key to
key.