Hach-Lange 2100 N Laboratory Turbidimeter User Manual - Manual (Page 5)

Advanced operation
..................................................................................................................................................................32
Calibrate the turbidimeter with formazin standards ..........................................................................................................................32
Prepare formazin standards .....................................................................................................................................................32
Calibration notes .......................................................................................................................................................................32
Formazin calibration procedure ................................................................................................................................................33
Making 4000-NTU formazin stock solution ...............................................................................................................................35
Calibrate the turbidimeter with user-selected formazin standards ...................................................................................................35
Prepare formazin standards – user selected ............................................................................................................................35
Change the calibration points ...................................................................................................................................................35
Maintenance
...................................................................................................................................................................................36
Clean the instrument ........................................................................................................................................................................36
Change the filter assembly ..............................................................................................................................................................36
Clean the filter assembly ..................................................................................................................................................................36
Replace the lamp .............................................................................................................................................................................36
Replace a fuse .................................................................................................................................................................................38
Troubleshooting
..........................................................................................................................................................................38
Error codes .....................................................................................................................................................................................38
Diagnostic codes ..............................................................................................................................................................................39
Delete calibration data .....................................................................................................................................................................39
Flashing 9s .......................................................................................................................................................................................40
Flashing 0s .......................................................................................................................................................................................40
Replacement parts and accessories
...............................................................................................................................40
Table of Contents
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