Hach 1950Plus, Instrument Manual, Page: 5 / 188

Table of Contents
Page 5
4195M0040TOC.fm
Table of Contents
6.8.1 Passcode Protection................................................................................................................................ 95
6.9 Validation Menu................................................................................................................................................. 95
6.9.1 Performing a New Validation.................................................................................................................... 96
6.10 Calibration Menu ............................................................................................................................................. 96
6.10.1 Calibration Overview and Options ......................................................................................................... 96
6.10.2 Calibration Screen ................................................................................................................................. 99
6.10.3 Manual Zero Calibration ........................................................................................................................ 99
6.10.4 Manual Span Calibration ..................................................................................................................... 100
6.10.5 Primary Zero/Primary Span Calibration............................................................................................... 102
6.10.6 Autocal Standard Screen..................................................................................................................... 102
6.10.7 Multi-point Calibrations ........................................................................................................................ 102
6.11 Grab Sample Menu ....................................................................................................................................... 106
6.12 Manual Control.............................................................................................................................................. 107
6.12.1 Initiate Clean........................................................................................................................................ 107
6.12.2 Initiate Calibration ................................................................................................................................ 107
6.12.3 Initiate Validation ................................................................................................................................. 107
6.12.4 Go Online ............................................................................................................................................ 107
6.12.5 Inhibit Next Clean ................................................................................................................................ 108
6.12.6 Inhibit Next Calibration......................................................................................................................... 108
6.12.7 Inhibit Next Validation .......................................................................................................................... 108
6.12.8 Active Calibration Set Selection........................................................................................................... 108
6.12.9 Reboot System? .................................................................................................................................. 108
6.13 Manual Control for Selecting Stream 1 or 2 .................................................................................................. 108
Maintenance ........................................................................................................................................................ 109
Section 7 Maintenance ....................................................................................................................................... 111
7.1 Electrostatic Discharge (ESD) Considerations................................................................................................ 111
7.2 Cleaning .......................................................................................................................................................... 111
7.3 Periodic Maintenance...................................................................................................................................... 112
7.4 Shut Down....................................................................................................................................................... 112
7.5 Pump Tube Replacement................................................................................................................................ 113
7.6 IR Cell Cleaning .............................................................................................................................................. 116
7.7 Pressure/Leak Test ......................................................................................................................................... 119
7.8 IR Cell Replacement ....................................................................................................................................... 119
7.8.1 Thumb Latch Adjustment....................................................................................................................... 119
7.9 IR Gas Calibration........................................................................................................................................... 121
7.9.1 IR Gas Calibration Procedure................................................................................................................ 121
7.10 Cleaning the Gas Liquid Separator (GLS) .................................................................................................... 123
7.11 Replacing a UV Lamp ................................................................................................................................... 123
7.12 Mirror Assembly Adjustment ......................................................................................................................... 125
7.13 Replacing the Fuses ..................................................................................................................................... 127
Section 8 Troubleshooting and Service Menus................................................................................................ 129
8.1 Preliminary Check ........................................................................................................................................... 129
8.2 Troubleshooting............................................................................................................................................... 129
8.2.1 Instrument Does Not Calibrate .............................................................................................................. 129
8.2.2 Instrument is Unstable or Drifts ............................................................................................................. 130
8.2.3 Periodic Spikes in the Readout.............................................................................................................. 130
8.3 Maintenance Code Diagnostics ...................................................................................................................... 132
8.4 Fault Code Diagnostics ................................................................................................................................... 135
8.5 Service Menu Structure ................................................................................................................................ 137
8.6 Service Menus ................................................................................................................................................ 138