Hach DR300 Service Manual

5.5 Replace the keypad
Items to collect:
• Keypad
• Krytox oil (item no. 16004801)
Step Description Picture
1 Open the instrument, refer to Open the instrument on page 35.
Remove the keypad.
2 Install a new keypad in the top housing.
Note: Coat the opening for the keypad with Krytox oil.
3 To reassemble the instrument.
Note: Coat the seal groove with Krytox oil.
This repair task is also available as a service video on HSO. HSO full access requires
login credentials. First log into HSO and afterwards click on
https://support.hach.com/app/answers/answer_view/a_id/1024331. Select the desired
service video.
Note: Following hyperlink without being logged will end in a permission denied information
screen.
5.6 Replace the housing
Items to collect:
• Top housing
• Bottom housing
• Battery contacts
• Load disk, foam
• Parameter label, refer to Set the part number on page 43
• Window
Repairs
47

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