In-Situ TROLL 9500 Operators Manual - Manual (Page 6)

0095110 rev. 007 01/09 TROLL 9500 Operator’s Manual
CONTENTS
VI
14 OXIDATION-REDUCTION POTENTIAL ................ 97
What is ORP? .................................................................................. 97
Why Measure ORP? ................................................................ 97
The pH/ORP Sensor ......................................................................... 97
Sensor Installation ............................................................................ 98
Calibration ......................................................................................... 98
Overview .................................................................................. 98
Calibration Solutions ................................................................ 98
Recommended Calibration Order for pH and ORP .................. 99
Traditional ORP Calibration Procedure .................................... 99
Resetting Default Coefficients ................................................ 100
Sensor Offset ......................................................................... 100
Units and Calculated Measurements .............................................. 100
Recommended Calibration Frequency ........................................... 100
Normalization to Standard Hydrogen Electrode Values .................. 100
Usage Recommendations and Cautions ........................................ 101
Sensor Care and Handling ............................................................. 101
Sensor Removal .................................................................... 101
Maintenance/Inspection/Cleaning .......................................... 101
Replacing the Filling Solution ................................................ 101
Replacing the Junction ........................................................... 101
Storage .................................................................................. 101
References ..................................................................................... 101
15 AMMONIUM .............................................. 104
What is Ammonium ? ..................................................................... 104
Why Measure Ammonium? ................................................... 104
The Ammonium Sensor .................................................................. 104
Sensor Preparation ................................................................ 104
The Nitrogen Cycle ................................................................ 104
Sensor Installation ................................................................. 105
Calibration ....................................................................................... 105
Overview ................................................................................ 105
Calibration Solutions .............................................................. 105
Recommended Calibration Frequency .................................. 106
Preparing to Calibrate ............................................................ 106
Ammonium Calibration Procedure ......................................... 106
Sensor Slope and Offset ........................................................ 108
Units and Calculated Measurements .............................................. 108
Usage Recommendations and Cautions ........................................ 108
pH ...................................................................................... 108
Temperature ........................................................................... 108
Conductivity ........................................................................... 108
Potential Interferences ........................................................... 108
Sensor Care and Handling ............................................................. 109
Sensor Removal .................................................................... 109
Maintenance/Inspection/Cleaning .......................................... 109
Storage .................................................................................. 109
References ..................................................................................... 109
16 CHLORIDE ................................................... 110
What Is Chloride? ........................................................................... 110
Why Measure Chloride? ........................................................ 110
The Chloride Sensor ....................................................................... 110
Sensor Preparation ................................................................ 110
Sensor Installation ................................................................. 110
Calibration ........................................................................................111
Overview .................................................................................111
Calibration Solutions ...............................................................111
Recommended Calibration Frequency ...................................111
Preparing to Calibrate .............................................................111
Chloride Calibration Procedure .............................................. 112
Sensor Slope and Offset ........................................................ 114
Units and Calculated Measurements .............................................. 114
Usage Recommendations and Cautions ........................................ 114
pH Effects .............................................................................. 114
Potential Interferences ........................................................... 114
Sensor Care and Handling ............................................................. 114
Sensor Removal .................................................................... 114
Maintenance/Inspection/Cleaning .......................................... 114
Storage .................................................................................. 114
17 NITRATE ..................................................... 115
What Is Nitrate ? ............................................................................. 115
Why Measure Nitrate? ........................................................... 115
The Nitrate Sensor .......................................................................... 115
Sensor Preparation ................................................................ 116
Sensor Installation ................................................................. 116
Calibration ....................................................................................... 116
Overview ................................................................................ 116
Calibration Solutions .............................................................. 117
Recommended Calibration Frequency .................................. 117
Preparing to Calibrate ............................................................ 117
Nitrate Calibration Procedure ................................................. 117
Sensor Slope and Offset ........................................................ 119
Units and Calculated Measurements .............................................. 119
Usage Recommendations and Cautions ........................................ 119
Temperature ........................................................................... 119
Potential Interferences ........................................................... 120
Sensor Care and Handling ............................................................. 120
Sensor Removal .................................................................... 120
Maintenance/Inspection/Cleaning .......................................... 120
Storage .................................................................................. 120
References ..................................................................................... 120
18 TURBIDITY .................................................. 121
What Is Turbidity? ........................................................................... 121
Why Measure Turbidity? ........................................................ 121
How Is Turbidity Measured? .................................................. 121
The Turbidity Sensor ....................................................................... 122
The Turbidity Wiper ......................................................................... 122
Wiper Installation ................................................................... 123
Wiper Movement .................................................................... 123
Manual Wipe .......................................................................... 124
Wiper Guidelines and Precautions ......................................... 124
Calibration ....................................................................................... 124
Factory Calibration ................................................................. 124
Field Calibration ..................................................................... 124
Calibration Solutions .............................................................. 124
Recommended Calibration Frequency .................................. 125
Turbidity Calibration Procedure .............................................. 125
Resetting Default Coefficients ................................................ 128
Sensor Slope and Offset ........................................................ 128
Units and Calculated Measurements .............................................. 128
Usage Recommendations and Cautions ........................................ 128
Common Interferences .......................................................... 128
Profiling Turbidity ............................................................................ 128
Logging Turbidity Data .................................................................... 128