Delta Electronics SS1-UM-1.05 user manual

Page 83

Local time - the time used in your particular time zone. It varies from GMT by an amount depending on longitude, political boundaries, and any daylight saving time.

Mean Leaf Angle (also Mean Tip Angle, Mean Inclination Angle) is the average angle of all the leaf elements relative to the horizontal, weighted according to area. This can be directly related to ELADP.

PAR - Photosynthetically Active Radiation is visible light of wavelength 400 nm - 700 nm. It is measured in units of ∝ mol.m-2.s-1(micromoles per square metre per second) or formerly ∝ E (micro-Einstein). The normal daylight maximum is a little over 2000 ∝ mol.m-2.s-1 .

PAR mapping - the study of distribution and variation of PAR within and below a canopy.

PRN a text file format intended for directly printable output.

Spread - a measure of the relative variation in light intensity along the SunScan probe. It is calculated as the Standard Deviation divided by the Mean (sometimes called coefficient of variation).

SunData software- the software used to drive the SunScan probe and calculate and store the results. There are two versions, one which runs in the Psion Workabout, the other in an IBM compatible PC. They are functionally very similar.

SunScan probe - the long light sensitive wand and handle used for light readings within the canopy.

Total PAR - the sum of Direct beam PAR and the Diffuse light PAR.

Transmission fraction - the fraction of incident light that passes through a given canopy. It can refer to Direct, Diffuse, or Total incident light.

Zenith angle - the angle between the centre of the sun and the point directly overhead.

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Contents SS1-UM-1.05 SunScanCE conformity CopyrightAcknowledgements TrademarksContents Technical Reference section Menus and Screens More Psion and file handling notesMeasurement options LAI theoryIndex AppendicesOrganisation of this manual How to use the manualsIntroduction SunScan Canopy Analysis SystemData Collection Terminal Field accessoriesSunScan probe Beam Fraction sensorWorkabout and SunScan probe Getting StartedPreliminary checks Checking the Workabout hardware What the s/w does Installing the SunData s/w in your PCInstalling the s/w SunData s/w DisketteRunning SunData Setting up your PCs COM portWorkabout to PC Communication checksSunScan probe to PC Running SunData in Windows Working with the Workabout SunScan TutorialAbout this tutorial Starting SunData in the Workabout What to do if you get lostStarting the PC software Using a PC instead of the WorkaboutThis page is intentionally blank Working through the menu options Setting up a measurement sessionHot Keys File SavingTaking readings Using the Emulator modeWithout a Beam Fraction Sensor Connecting the SunScan probeConnecting the Beam Fraction Sensor Measuring Leaf Area Index without a Beam Fraction Sensor Averages Reviewing your data fileTo the PC Transferring the data file to your PCFrom the Workabout Initiating the file transfer from the Workabout Meanwhile, on the PC Conclusion of the Tutorial RS232 communication problemsSunData Screens on the Workabout File SettingsMenus and Screens Utils ContdQuit Navigating the Psion directories and screens More Psion and file handling notesNavigating Psion directories and screens Workabout User GuidePsion subdirectory usage in file select dialogs Flashcards reformatting Re-installing the SunData application iconDeleting unwanted Workabout files Data memory management Configuration and data file handlingSunData Configuration files Data files Default .cfgCreating 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 optionsExperiment design Canopy type and LAI estimates Canopy Sampling volumeCanopy type and BFS practicalities Planning for the sun’s position Preferred light and weather conditionsAbsorption Advice on Absorption and Eladp valuesSetting Eladp Estimating Eladp in the field Relationship between Mean Leaf Angle and EladpLAI, PAR and All displays Workabout setupSunScan System Measurement modes Autolog function Levelling the probe Measurement procedures in the fieldProbe handling in the field Probe GO buttonWorkabout Using the tripodBFS handling in the field Use of the tripodExtension cables, and the location of the BFS Finding North, and setting the shade ringLevelling the BFS Recalibrate option PAR calibrationsFactory light calibration Checking the probe/BFS matchingComparing the calibration with other PAR sensors Routine maintenance and cleaningRestoring the factory calibration Effect of the shade ring on the BFSSunScan probe and Beam Fraction Sensor Environmental and moisture protectionIngredients of the LAI computation method LAI theoryTheory versus reality Derivation of Wood’s SunScan canopy analysis equationsMajor assumptions Transmission of Diffuse Light Beers law for canopy absorptionCampbells Ellipsoidal LAD equations Transmission fraction τ Is given by I/I0 Diffuse light transmission cosine corrected sensor Modelling the canopy transmissionDetail Diffuse light hemispherical response sensor Functions used to model canopy transmissionAccuracy of LAI calculations Diffuse light cosine response sensorExp 0.1 . x . atan 0.9 Atan L Q Spher Modelling incomplete PAR absorption and scatteringSummary Scientific referencesCalculating zenith angles Jones, Hamlyn G Plants and Microclimate second edition. CUP SunScan probe batteries Maintenance and repairTechnical Reference section Checking the batteriesChecking the desiccant Factory calibration method Re-setting the factory calibrationChecking the PAR calibration While running SunData TroubleshootingProblems running the SunData application Psion WorkaboutInsufficient power to write data reported Technical Support Data Collection Terminal type DCT1 Psion Workabout SpecificationsSunScan Probe Type SS1 Beam Fraction Sensor type BF1Logging Cables Carrying Case type SCC1Telescopic Tripod type BFT1 Spares Kit type SPS1Spectral response PAR PerformanceSunScan system cosine response Cosine responses of probe and BFSLogging the probe as a Linear Quantum Sensor AppendicesLogging the Beam Fraction sensor Revision History Upgrading the SunScan systemSunData PC s/w Workabout SunData s/wWorkabout Remote Link File transfer between Workabout and PCChoice of different programs PsiWinSlink and Rcom Example using SlinkDrives on the PC are referred to as REMA, Remc REM = remote Documentation of Rcom and Slink Example using RcomSending a file to a serial printer Using the Workabout Comms applicationAlternative file transfer mechanisms Sending a file to a Communication programGlossary Page Accuracy IndexIndex Field use 39, 46, 48, 50, 51, 58

SS1-UM-1.05 specifications

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