Campbell Scientific OBS500 Smart Turbidity Meter with ClearSensor Technology - Manual (Page 7)

Table of Contents
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1. Introduction ................................................................. 1
2. Cautionary Statements ............................................... 1
3. Initial Inspection ......................................................... 2
3.1 Ships With ............................................................................................ 2
4. Quickstart .................................................................... 2
4.1 Mounting Suggestions .......................................................................... 2
4.2 Datalogger Programming and Wiring .................................................. 6
5. Overview ...................................................................... 8
5.1 Applications ......................................................................................... 9
5.2 Turbidity Units ..................................................................................... 9
5.3 Measurement Details .......................................................................... 10
5.4 Vertical-Cavity Surface-Emitting Laser Diode .................................. 11
6. Specifications ........................................................... 12
7. Installation ................................................................. 13
7.1 Default Settings .................................................................................. 13
7.2 Device Configuration Utility .............................................................. 13
7.3 Datalogger/RTU Connection .............................................................. 16
7.3.1 SDI-12 Wiring ............................................................................ 17
7.3.2 RS-232 Wiring ............................................................................ 18
7.3.3 Analog 0 to 5 Volt Wiring .......................................................... 18
7.4 Communication Modes ...................................................................... 19
7.4.1 SDI-12 ......................................................................................... 19
7.4.1.1 SDI-12 Addresses ............................................................. 20
7.4.1.2 SDI-12 Transparent Mode ................................................ 21
7.4.2 RS-232 ........................................................................................ 22
7.5 Calibration .......................................................................................... 22
7.5.1 Turbidity ..................................................................................... 22
7.5.2 Sediment ..................................................................................... 26
7.5.2.1 Dry-Sediment Calibration ................................................ 26
7.5.2.2 Wet-Sediment Calibration ................................................ 27
7.5.2.3 In situ Calibration ............................................................. 27
7.5.2.4 Performing a Dry-Sediment Calibration........................... 27
7.6 Programming ...................................................................................... 29
7.6.1 Using SCWIN ............................................................................. 29
7.6.2 CRBasic Programming ............................................................... 29
7.6.2.1 SDI-12 .............................................................................. 29
7.6.2.2 RS-232 .............................................................................. 29
7.6.2.3 Analog .............................................................................. 29
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