Table of Contents
ii
Turbidity..................................................................................... 24
Sediment..................................................................................... 27
Dry-Sediment Calibration ................................................ 27
Wet-Sediment Calibration ............................................... 28
In situ Calibration ............................................................ 28
Performing a Dry-Sediment Calibration .......................... 28
Operation in High Sediment Loads and Sandy Sediments ................ 30
Wiper Removal Procedure ......................................................... 30
Maintenance ............................................................. 32
Troubleshooting ....................................................... 33
References ................................................................ 34
Appendices
Importing Short Cut Code Into CRBasic Editor ... A-1
Example Programs ................................................. B-1
CR6 SDI-12 Program ...................................................................... B-1
CR1000 SDI-12 Program ................................................................ B-2
CR1000 RS-232 Program ................................................................ B-3
CR1000 Analog Program ................................................................ B-4
Examples for High Sediment Loads ................................................ B-5
Normally Open CR1000 Example ........................................... B-5
Cycle Shutter/Wiper for Each Measurement CR1000
Program ................................................................................ B-6
Sleeve Installation .................................................. C-1
SDI-12 Sensor Support .......................................... D-1
SDI-12 Command Basics ................................................................ D-1
Address Query Command (?!) ................................................. D-1
Change Address Command (aAb!) .......................................... D-1
Start Measurement Commands (aM!) ...................................... D-2
Aborting a Measurement Command ........................................ D-2
Send Data Command (aDv!) .................................................... D-2
SDI-12 Transparent Mode ............................................................... D-2
CR200(X) Series Datalogger Example .................................... D-2
CR1000 Datalogger Example ................................................... D-3
Factors that Affect Turbidity and Suspended-
Sediment Measurements ..................................... E-1
Suspensions with Mud and Sand ...................................................... E-2
Particle-Shape Effects ...................................................................... E-2
High Sediment Concentrations ......................................................... E-3
IR Reflectivity—Sediment Color ..................................................... E-4