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INSTRUCTION MANUAL OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors Revision: 9/14 Copyright © 2008- 2014 Campbel

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OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 1. Introduction The OBS-3+ and OBS300 are submersible, turbidity sensors that use OBS® tec

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 4. Quickstart 4.1 Preparation for Use 1. Bench test the sensor to ensure that it function

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 3. When Short Cut opens, select New Program. 4. Select Datalogger Model and Scan Interva

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 5. Under the Available Sensors and Devices list, select the Sensors | Water | Quality fold

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 8. If LoggerNet, PC400, or PC200W is running on your PC, and the PC to datalogger connectio

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors Turbidity is caused by suspended and dissolved matter such as sediment, plankton, bacteria,

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors FIGURE 5-1. Components of the OBS-3+ (left) and orientation source beam and detector

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 6. Specifications Features: • Measures suspended solids and turbidity for up to 4000 NTU

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 7. Installation If you are programming your da

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 7.2 Mounting Considerations Schemes for mounting the OBS-3+ and OBS300 will vary with appli

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors TABLE 7-1. Connection to Campbell Scientific Dataloggers Color Description CR800, CR850

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 7.4 Datalogger Programming CRBasic and Edlog are included in our PC400 and LoggerNet Datalo

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors FIGURE 7-2. Calibration certificate showing millivolt coefficients Curve Type Polynomial f

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors FIGURE 7-3. Calibration certificate showing volts coefficients 8. Calibration 8.1 Turbid

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors NTU value with a 2nd-order polynomial. This section explains how to do a turbidity calibrat

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors The NTU values of the standards will remain the same as long as the ratio of particle mass (

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 8.1.2 Setup 1. Plug the test cable into the OBS sensor; connect the red and black leads to

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 8. Perform 2nd-order polynomial regressions on the calibration data to get the coefficients

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors suspender after each addition of sediment for the determination of SSC by filtration and gra

Limited Warranty “Products manufactured by CSI are warranted by CSI to be free from defects in materials and workmanship under normal use and service

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors see FIGURE 8-4. For the OBS300, mount the sensor so that the laser diode is submerged just

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 8. Add enough additional sediment to get one full increment of sediment, Wi ± 5%. Repeat s

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors TABLE 9-1. Troubleshooting Chart Fault Cause of Fault Remedy Fails finger wave test No po

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 11. Factors that Affect Turbidity and Suspended-Sediment Measurements This section summariz

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors FIGURE 11-2. The apparent change in turbidity resulting from disaggregation methods 11.2

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 0 20 40 60 80 100 120 140 160 180Scat t ering Angle0.010.11Relative Scattering IntensityCube

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors FIGURE 11-4. Response of an OBS sensor to a wide range of SSC 11.5 IR Reflectivity—Sedime

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors FIGURE 11-5. Infrared reflectivity of minerals as a function of 10-Munzell value 11.6 Wa

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors organic matter and interference from these materials can therefore be ignored most of the ti

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors 13. Terminology 110 Rule: 100 ppm of 100-μm suspended sand will scatter light with the same

Assistance Products may not be returned without prior authorization. The following contact information is for US and international customers residing

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors sediment, plankton, bacteria and viruses, organic acids, and dyes. In general, as the conce

Appendix A. Importing Short Cut Code This tutorial shows: • How to import a Short Cut program into a program editor for additional refinement. • H

Appendix A. Importing Short Cut Code 5. The program can now be edited, saved, and sent to the datalogger. 6. Import wiring information to the progr

Appendix B. Example Programs B.1 CRBasic Examples B.1.1 CR1000 Example Program Below is an example CR1000 program. The calibration values used in

Appendix B. Example Programs 'the true NTU. Big particles can cause errors that would skew an average NTU = NTUX(11) 'Use the low

Appendix B. Example Programs For i = 1 To n 'n=10 in this case so ten measurements will be made for both the high and low 'in

Appendix B. Example Programs ;activate SW12V for turbidity probe, delay 3 seconds, then measure 1: Do (P86) 1: 48 Set Port 8 High 2: Excitat

Appendix B. Example Programs NTU = -0.20709 + (401.11*NTU_Volts) + (35.310*NTU_Volts^2) 6: End (P95) End Program B-5

Appendix B. Example Programs B-6

Appendix C. Electrical Connections Details FIGURE C-1 shows the contact numbers for the MCIL/MCBH-5 connectors and TABLE C-1 lists the electrical fu

Precautions DANGER — MANY HAZARDS ARE ASSOCIATED WITH INSTALLING, USING, MAINTAINING, AND WORKING ON OR AROUND TRIPODS, TOWERS, AND ANY ATTACHMENTS TO

Appendix C. Electrical Connections Details TABLE C-1. Pin numbers, electrical functions and wire color codes for OBS sensor bulkhead connectors. MCB

Appendix D. Datalogger Connection to a Relay The CR10, CR7, CR510, and 21X dataloggers do not have a switched 12 V channel. Either the sensor can r

Appendix D. Datalogger Connection to a Relay D-2

Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com • info@campbe

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Table of Contents 10. Maintenance ..... 22 11. Factors that Affect Turbidity and Suspended-Se

Table of Contents 8-3. OBS-3+ (left) and OBS300 (right) in 500-NTU AMCO Clear® turbidity standard in 100-mm black polyethylene calibration cup ...