Hach QC8500 Series 2 User Manual page 4

Table of Contents
4.8 Inert probe ..................................................................................................................................45
4.9 Pump operation ..........................................................................................................................46
4.9.1 Reagent pump shutdown procedure .................................................................................47
4.9.2 Reagent pump maintenance .............................................................................................47
4.10 Temperature controller .............................................................................................................47
4.11 Dilutor setup .............................................................................................................................47
4.12 Dye test standards ...................................................................................................................48
4.12.1 Mix dye standards ...........................................................................................................48
4.13 Calibration run ..........................................................................................................................49
Section 5 Maintenance
5.1 Cleaning instructions ..................................................................................................................51
5.2 System shutdown procedure......................................................................................................52
5.3 Manifold removal ........................................................................................................................52
5.4 Heater assembly installation and removal..................................................................................53
5.4.1 Heater assembly installation..............................................................................................53
5.4.2 Heater assembly removal..................................................................................................54
5.5 Wrap a heater mandrel..............................................................................................................55
5.6 Dilutor maintenance ...................................................................................................................56
5.7 Sampler maintenance ................................................................................................................56
5.7.1 ASX-500 Series and ASX-400 Series maintenance..........................................................56
5.7.2 Rinse station tubing replacement ......................................................................................57
5.8 Pump maintenance ....................................................................................................................57
5.9 Valve module..............................................................................................................................57
5.9.1 Valve module replacement ................................................................................................58
5.9.2 Valve module maintenance ...............................................................................................58
5.10 Flow cell maintenance..............................................................................................................59
5.11 Detector module replacement ..................................................................................................59
5.12 Manifold maintenance ..............................................................................................................60
5.13 Computer maintenance ............................................................................................................60
5.14 Lamp replacement....................................................................................................................60
5.15 Fuse replacement.....................................................................................................................62
5.15.1 PDS fuse replacement.....................................................................................................62
5.15.2 Reagent pump RP-150 fuse replacement .......................................................................62
5.16 Parts description.......................................................................................................................62
Section 6 Troubleshooting
6.1 Valve timing setup ......................................................................................................................64
6.2 Sampler timing setup..................................................................................................................64
6.3 Air spike troubleshooting ............................................................................................................64
6.3.1 Random air spikes.............................................................................................................64
6.3.2 Patterned air spikes...........................................................................................................65
6.4 Peak shapes interpretation and troubleshooting ........................................................................66
6.4.1 Refractive index.................................................................................................................66
6.4.2 pH effect ............................................................................................................................67
6.4.3 Valve artifact......................................................................................................................68
6.4.4 Carryover...........................................................................................................................68
6.4.5 Flat-topped peaks..............................................................................................................69
6.4.6 No peaks ...........................................................................................................................70
6.4.7 Noisy baseline ...................................................................................................................71
6.4.8 Drifting baseline.................................................................................................................72
6.4.9 Negative peaks and carrier contamination ........................................................................73
6.5 Flow blockages...........................................................................................................................73
6.5.1 Find blockages ..................................................................................................................74
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