Campbell Scientific OBS500 Smart Turbidity Meter with ClearSensor Technology - Manual (Page 8)

Table of Contents
7.6.3 Edlog Programming ................................................................... 29
7.7 Operation in High Sediment Loads and Sandy Sediments ................ 30
7.7.1 Wiper Removal Procedure ......................................................... 31
8. Factors that Affect Turbidity and Suspended-
Sediment Measurements ....................................... 33
8.1 Particle Size ....................................................................................... 33
8.2 Suspensions with Mud and Sand ....................................................... 34
8.3 Particle-Shape Effects ....................................................................... 34
8.4 High Sediment Concentrations .......................................................... 35
8.5 IR Reflectivity—Sediment Color ...................................................... 36
8.6 Water Color ....................................................................................... 37
8.7 Bubbles and Plankton ........................................................................ 37
9. Maintenance .............................................................. 38
10. Troubleshooting ........................................................ 39
11. References ................................................................. 41
Appendices
A.
Importing Short Cut Code ...................................... A-1
A.1 Importing Short Cut Code into a Program Editor ............................ A-1
A.1.1 CRBasic Datalogger ................................................................. A-1
A.1.2 Edlog ........................................................................................ A-2
B. Example Programs .................................................. B-1
B.1 CR1000 SDI-12 Program ................................................................ B-1
B.2 CR1000 RS-232 Program ................................................................ B-2
B.3 CR1000 Analog Program ................................................................ B-3
B.4 Examples for High Sediment Loads ................................................ B-4
B.4.1 Normally Open CR1000 Example ............................................ B-4
B.4.2 Cycle Shutter/Wiper for Each Measurement CR1000
Program ................................................................................ B-5
C. OBS500 Copper Sleeve Kit Installation ................. C-1
Figures
4-1. Use strain relief to keep stress off the cable and provide extra
security ............................................................................................. 3
4-2. Apply tape to protect sensor ................................................................ 4
4-3. Secure with hose clamps. Do not overtighten. ................................... 4
4-4. Place and secure mounting fixture ....................................................... 5
5-1. Drawing of the OBS500 sensor ......................................................... 10
5-2. Orientation of emitter cone (source beam) and OBS and side
scatter detector (acceptance) cones ................................................ 11
7-1. Device Configuration Utility ............................................................. 14
7-2. Terminal Mode using 1 and H commands ......................................... 15
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