Figure 1 Product components
1 DR300 5 Storage case
2 AAA alkaline batteries 6 Reagents
3 Sample cells, 25 mm (10 mL), glass 7 Hach Communication Dongle (optional, supplied
separately)
4 Sample cells, 1 cm (10 mL), plastic
2.4 Keypad description
Figure 2 shows the keypad and gives the key functions.
Figure 2 Keypad
1 Range key: Selects the measurement range (e.g., LR or
HR).
Push and hold for 3 seconds to enter or exit menu mode.
In menu mode, scrolls up or increases the value of the
selected digit.
4 Backlight key: Sets the backlight to on and off.
In menu mode, scrolls down or decreases the value of the
selected digit.
2 Zero key: Sets the zero value before a measurement.
In menu mode, goes back one menu level or moves the
cursor to the previous digit.
5 Read key: Starts a sample measurement.
In menu mode, selects the menu option shown or moves
the cursor to the next digit.
3 Power key: Sets the power to on and off.
Push and hold for 5 seconds to reset the instrument. The
calibration is not deleted.
General information
7
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