Campbell Scientific Bowen Ratio Instrumentation - Manual (Page 3)

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Bowen Ratio Table of Contents
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1. System Overview ......................................................1-1
1.1 Review of Theory ................................................................................. 1-1
1.2 System Description ............................................................................... 1-3
1.2.1 Water Vapor Measurement ......................................................... 1-3
1.2.2 Air Temperature Measurement ................................................... 1-4
1.2.3 Net Radiation and Soil Heat Flux ............................................... 1-5
1.2.4 Power Supply .............................................................................. 1-5
2. Station Installation....................................................2-1
2.1 Sensor Height and Separation............................................................... 2-1
2.2 Soil Thermocouples and Heat Flux Plates ............................................ 2-2
2.3 Wiring................................................................................................... 2-4
2.4 Battery Connections.............................................................................. 2-7
2.5 System Startup ...................................................................................... 2-7
2.6 Routine Maintenance ............................................................................ 2-7
2.7 Cleaning the DEW 10........................................................................... 2-8
3. Sample CR23X Program...........................................3-1
4. Calculating Fluxes Using SPLIT ..............................4-1
4.1 Data Handling........................................................................................ 4-1
4.2 Calculating Fluxes ................................................................................ 4-1
Appendices
A. References............................................................... A-1
B. 023 Bowen Ratio (Pre July 1993) ........................... B-1
Tables
1.2-1. Component Power Requirements ..................................................... 1-5
2.3-1. CR23X/Sensor Connections for Example Program ......................... 2-4
3-1. Sample CR23X Bowen Ratio Program Flow Chart ............................ 3-2
3-2. Output From Example Bowen Ratio Program .................................... 3-5
4.2-1. Input Values for Flux Calculations .................................................. 4-3