Hach Lange DR 3900 User Manual page 7

6.8 System Checks............................................................................................................................... 111
6.8.1 Instrument Information ........................................................................................................... 111
6.8.2 Update the instrument software ............................................................................................. 111
6.8.3 Optical Checks....................................................................................................................... 112
6.8.3.1 Verification kit................................................................................................................ 112
6.8.3.2 Test solution.................................................................................................................. 113
6.8.3.3 Wavelength check......................................................................................................... 115
6.8.3.4 Stray light check............................................................................................................ 115
6.8.3.5 Absorbance check ........................................................................................................ 116
6.8.4 AQA - Analytical Quality Assurance....................................................................................... 117
6.8.4.1 AQA Standard configuration ......................................................................................... 118
6.8.4.2 AQA Addition ................................................................................................................ 119
6.8.4.3 Multiple Determination .................................................................................................. 120
6.8.4.4 Dilution .......................................................................................................................... 121
6.8.4.5 Performing AQA measurement..................................................................................... 121
6.8.4.6 Pipette test set .............................................................................................................. 121
6.8.5 Instrument backup ................................................................................................................. 121
6.8.6 Service menu ......................................................................................................................... 123
6.8.7 Service time ........................................................................................................................... 123
6.8.8 Lamps operating time ............................................................................................................ 123
6.9 Toolbar............................................................................................................................................ 124
6.9.1 Log on .................................................................................................................................... 124
6.9.2 Sample ID .............................................................................................................................. 124
6.9.3 Timer...................................................................................................................................... 125
6.9.4 AQA ....................................................................................................................................... 125
6.9.5 Trends.................................................................................................................................... 125
6.9.6 Link2SC ................................................................................................................................. 125
6.9.7 Website DR 3900................................................................................................................... 126
Section 7 Maintenance ....................................................................................................................... 127
7.1 Cleaning requirements.................................................................................................................... 127
7.1.1 Spectrophotometer ................................................................................................................ 127
7.1.2 Display ................................................................................................................................... 127
7.1.3 Cuvettes/cells......................................................................................................................... 127
7.2 Lamp replacement .......................................................................................................................... 128
7.3 Exchange of the replaceable cell compartment.............................................................................. 130
Section 8 Troubleshooting................................................................................................................. 133
Section 9 Replacement parts ............................................................................................................. 137
9.1 Accessories .................................................................................................................................... 137
9.2 Replacement parts.......................................................................................................................... 138
Table of contents
7