Hach DR300 Service Manual

• Krytox oil (item no. 16004801)
Step Description Picture
1 Open the instrument, refer to Open the instrument on page 35.
2 Remove the defective battery contacts from the bottom
housing. If the battery contact LPZ445.99.00011 is defective,
replace the bottom housing. Refer to Replace the housing
on page 47.
3 Install in the bottom housing new battery contacts.
Note: Push down the battery contact springs with blade of a screw
driver.
Note: First stick the contacts to the slot in the plastic part. Make sure
that the contacts are placed in correct direction. Push in the battery
contacts. The battery contacts click in the correct position.
4 To reassemble the instrument, install display, keypad, optical
unit and mainboard. Close the instrument.
Note: Coat the seal groove with Krytox oil.
Note: Make sure that the screws are tightened to 0.8 Nm.
Repairs
50

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