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Campbell Scientific OBS300 OBS-3+ and OBS300 Suspended Solids and Turbidity Mo - Page 21

TABLE 7-1., Connection to Campbell Scientific Dataloggers, Color, Description, CR800, CR850, CR1000

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OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors TABLE 7-1. Connection to Campbell Scientific Dataloggers Color Description CR800, CR850 CR1000, CR3000 CR5000, CR23X CR10X White High Range Signal Single-ended Input Single-ended Input Blue Low Range Signal Single-ended Input Single-ended Input Green Signal Ground AG Black Power Ground G G Red Power SW12V SW12V Clear Shield G G FIGURE 7-1. OBS-3+ connected to a CR1000 Datalogger (OBS300 has the same wiring) NOTE The assignment of channel (for example, SE1, SE2) vary depending on application. 11

Section	Page
Revision and Copyright Information	1
Limited Warranty	3
Assistance	4
Precautions	5
Table of Contents	7
1. Introduction	11
2. Cautionary Statements	11
3. Initial Inspection	11
4. Quickstart	12
4.1 Preparation for Use	12
4.2 Use SCWin to Program Datalogger and Generate Wiring Diagram	12
5. Overview	15
5.1 Applications	15
5.2 Turbidity	15
5.3 Design Details	16
5.4 Measurement Details	17
6. Specifications	18
7. Installation	19
7.1 Pre-Deployment Tests	19
7.2 Mounting Considerations	20
7.2.1 Siting	20
7.2.2 Mounting Options	20
7.2.2.1 PVC Pipe	20
7.2.2.2 Cable Ties or Hose Clamps	20
7.3 Wiring to Datalogger	20
7.4 Datalogger Programming	22
7.5 Calibration Certificate	22
8. Calibration	24
8.1 Turbidity	24
8.1.1 Materials and Equipment	26
8.1.2 Setup	27
8.1.3 Procedure	27
8.2 Sediment	28
8.2.1 Dry-sediment Calibration	28
8.2.2 Wet-sediment Calibration	28
8.2.3 In situ Calibration	29
8.2.3.1 Materials and Equipment	29
8.2.3.2 Setup	29
8.2.3.3 Procedure	30
9. Troubleshooting	31
10. Maintenance	32
11. Factors that Affect Turbidity and Suspended-Sediment Measurements	33
11.1 Particle Size	33
11.2 Suspensions with Mud and Sand	34
11.3 Particle-Shape Effects	34
11.4 High Sediment Concentrations	35
11.5 IR Reflectivity—Sediment Color	36
11.6 Water Color	37
11.7 Bubbles and Plankton	37
11.8 Biological and Chemical Fouling	38
12. References	38
13. Terminology	39
Appendix A. Importing Short Cut Code	43
A.1 Importing Short Cut Code into a Program Editor	43
A.1.1 CRBasic Datalogger	43
A.1.2 Edlog	44
Appendix B. Example Programs	45
B.1 CRBasic Examples	45
B.1.1 CR1000 Example Program	45
B.1.2 CR200(X) Example Program	46
B.2 Edlog Example	47
Appendix C. Electrical Connections Details	51
Appendix D. Datalogger Connection to a Relay	53