Hach DR300 User Manual

Figure 3 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.
English 9

Hach DR300 Specifications

General

Type	Portable Spectrophotometer
Operating Temperature	0 to 50 °C
Method	Pre-programmed methods
Light Source	LED
Wavelength Accuracy	±2 nm
Resolution	0.001 Abs
Display	LCD
Measurement Method	Absorbance
Parameter	Various
Photometric Range	0 to 2.5 A
Dimensions	230 x 93 x 280 mm (9.1 x 3.7 x 11.0 in)
Photometric Accuracy	±0.005 Abs