Contents
SS1-UM-1.05
SunScan
CE conformity
Copyright
Acknowledgements
Trademarks
Contents
Technical Reference section
Menus and Screens More Psion and file handling notes
Measurement options
LAI theory
Index
Appendices
Organisation of this manual
How to use the manuals
Introduction
SunScan Canopy Analysis System
Data Collection Terminal
Field accessories
SunScan probe
Beam Fraction sensor
Workabout and SunScan probe
Getting Started
Preliminary checks
Checking the Workabout hardware
What the s/w does
Installing the SunData s/w in your PC
Installing the s/w
SunData s/w Diskette
Running SunData
Setting up your PCs COM port
Workabout to PC
Communication checks
SunScan probe to PC
Running SunData in Windows
Working with the Workabout
SunScan Tutorial
About this tutorial
Starting SunData in the Workabout
What to do if you get lost
Starting the PC software
Using a PC instead of the Workabout
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Working through the menu options
Setting up a measurement session
Hot Keys
File Saving
Taking readings
Using the Emulator mode
Without a Beam Fraction Sensor
Connecting the SunScan probe
Connecting the Beam Fraction Sensor
Measuring Leaf Area Index without a Beam Fraction Sensor
Averages
Reviewing your data file
To the PC
Transferring the data file to your PC
From the Workabout
Initiating the file transfer from the Workabout
Meanwhile, on the PC
Conclusion of the Tutorial
RS232 communication problems
SunData Screens on the Workabout
File
Settings
Menus and Screens
Utils
Contd
Quit
Navigating the Psion directories and screens
More Psion and file handling notes
Navigating Psion directories and screens
Workabout User Guide
Psion subdirectory usage in file select dialogs
Flashcards reformatting
Re-installing the SunData application icon
Deleting unwanted Workabout files
Data memory management
Configuration and data file handling
SunData Configuration files
Data files
Default .cfg
Creating a configuration file
Restoring a configuration
.CSV file
Displaying data files on your PC
.PRN file
Data file layouts and data groups
Page
Above-canopy reference requirements
Measurement options
Experiment design
Canopy type and LAI estimates
Canopy Sampling volume
Canopy type and BFS practicalities
Planning for the sun’s position
Preferred light and weather conditions
Absorption
Advice on Absorption and Eladp values
Setting Eladp
Estimating Eladp in the field
Relationship between Mean Leaf Angle and Eladp
LAI, PAR and All displays
Workabout setup
SunScan System Measurement modes
Autolog function
Levelling the probe
Measurement procedures in the field
Probe handling in the field
Probe GO button
Workabout
Using the tripod
BFS handling in the field
Use of the tripod
Extension cables, and the location of the BFS
Finding North, and setting the shade ring
Levelling the BFS
Recalibrate option
PAR calibrations
Factory light calibration
Checking the probe/BFS matching
Comparing the calibration with other PAR sensors
Routine maintenance and cleaning
Restoring the factory calibration
Effect of the shade ring on the BFS
SunScan probe and Beam Fraction Sensor
Environmental and moisture protection
Ingredients of the LAI computation method
LAI theory
Theory versus reality
Derivation of Wood’s SunScan canopy analysis equations
Major assumptions
Transmission of Diffuse Light
Beers law for canopy absorption
Campbells Ellipsoidal LAD equations
Transmission fraction τ Is given by I/I0
Diffuse light transmission cosine corrected sensor
Modelling the canopy transmission
Detail
Diffuse light hemispherical response sensor
Functions used to model canopy transmission
Accuracy of LAI calculations
Diffuse light cosine response sensor
Exp 0.1 . x . atan 0.9 Atan L Q Spher
Modelling incomplete PAR absorption and scattering
Summary
Scientific references
Calculating zenith angles
Jones, Hamlyn G Plants and Microclimate second edition. CUP
SunScan probe batteries
Maintenance and repair
Technical Reference section
Checking the batteries
Checking the desiccant
Factory calibration method
Re-setting the factory calibration
Checking the PAR calibration
While running SunData
Troubleshooting
Problems running the SunData application
Psion Workabout
Insufficient power to write data reported
Technical Support
Data Collection Terminal type DCT1 Psion Workabout
Specifications
SunScan Probe Type SS1
Beam Fraction Sensor type BF1
Logging Cables
Carrying Case type SCC1
Telescopic Tripod type BFT1
Spares Kit type SPS1
Spectral response
PAR Performance
SunScan system cosine response
Cosine responses of probe and BFS
Logging the probe as a Linear Quantum Sensor
Appendices
Logging the Beam Fraction sensor
Revision History
Upgrading the SunScan system
SunData PC s/w
Workabout SunData s/w
Workabout Remote Link
File transfer between Workabout and PC
Choice of different programs
PsiWin
Slink and Rcom
Example using Slink
Drives on the PC are referred to as REMA, Remc REM = remote
Documentation of Rcom and Slink
Example using Rcom
Sending a file to a serial printer
Using the Workabout Comms application
Alternative file transfer mechanisms
Sending a file to a Communication program
Glossary
Page
Accuracy
Index
Index
Field use 39, 46, 48, 50, 51, 58