Campbell CS650, Руководство пользователя

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Contents
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1. Introduction ................................................................ 1
2. Cautionary Statements .............................................. 1
3. Initial Inspection ........................................................ 1
4. Quickstart ................................................................... 2
5. Overview ..................................................................... 4
6. Specifications ............................................................ 6
6.1 Electrical Specifications ....................................................................... 7
6.1.1 Current .......................................................................................... 7
6.2 Operational Specifications ................................................................... 8
7. Installation .................................................................. 9
7.1 Orientation and Placement ................................................................... 9
7.2 Proper Insertion .................................................................................. 10
7.3 Datalogger Wiring.............................................................................. 10
7.4 Programming ...................................................................................... 11
8. Operation .................................................................. 12
8.1 A200 and Device Configuration Utility ............................................. 12
8.1.1 Using the A200 ........................................................................... 12
8.1.1.1 Driver Installation ............................................................ 12
8.1.1.2 RS-232 Wiring ................................................................. 12
8.1.1.3 Powering the Sensor ......................................................... 13
8.1.1.4 Determining which COM Port the A200 has been
Assigned ....................................................................... 13
8.1.2 Device Configuration Utility ( DevConfig ) .................................. 13
8.1.2.1 Settings Editor Tab ........................................................... 15
8.1.2.2 Send OS Tab..................................................................... 16
8.1.2.3 Terminal Tab .................................................................... 17
8.2 SDI-12 Measurements ........................................................................ 19
8.2.1 Use of Multiplexers .................................................................... 19
8.3 Water Content Reflectometer Method for Measuring Volumetric
Water Content ................................................................................. 20
8.3.1 Description of Measurement Method.......................................... 20
8.3.2 The Topp Equation ..................................................................... 20
8.3.3 Electrical Conductivity ............................................................... 21
8.3.3.1 Soil Electrical Conductivity ............................................. 21
8.3.3.2 Temperature Correction of Soil Electrical Conductivity .. 22
8.3.4 Error Sources in Water Content Reflectometer Measurement .... 22
8.3.4.1 Probe-to-Probe Variability Error ...................................... 22
8.3.4.2 Insertion Error .................................................................. 22