Delta Electronics SS1-UM-1.05 user manual Autolog function

Page 47

The Autolog function

You can set up the SunScan system to operate automatically in any of its modes, just as if you were pushing the read, store and average buttons at regular intervals.

Note: don't confuse Autolog with logging the probe as a Linear Quantum sensor, or with logging the Beam Fraction sensor as an independent sensor. These applications are dealt with in the Appendices.

From Menu, Utils, Autolog, Enter you will arrive in the Automatic Logging setup screen:

This is the Autolog setup screen. Use the ↑↓↓ keys to select the choices; edit the prompted values or use the ↔ keys to toggle

through options presented.

System time in the heading is

 

constantly updated

 

You will be prompted with a current

 

Start time, and 6 hours later Stop time

 

and date. Edit these appropriately.

 

Change the read interval to

 

whatever sampling interval you

 

want (hh:mm:ss).

Nighttime is defined as when the

 

sun is more than 6° below the

If you leave the Average interval at 0

horizon. SunScan computes this

you will not get average summaries.

for you automatically.

Any other setting (hh:mm:ss) will

 

 

insert average summaries into the data

 

file at the specified intervals.

The Start time can be set to a time up to 24 hours before the current time! You might do this for example if you wanted to set up averaging on the hour with sampling at one minute intervals but the system time had just gone past the hour.

When you are satisfied with your choices, press Enter to accept the screen and initiate the logging process. After a few minutes the Workabout will sleep and the screen will go blank. You can safely press Off to blank the screen immediately (it will not stop the Autolog process). From time to time when a reading is logged, the screen will briefly show a Logging in progress message.

At any time, if you want to check the status of the Autolog, press On/Esc to access the screen on the left.

The timing of the next reading (and the Plot and Sample number) will be indicated, with the current system time. You can either select Sleep, Enter (to continue) or Cancel, Enter to cancel (stop) the logging session from this screen. If you select Cancel you must confirm that you want to stop logging by pressing On/Esc.

SunScan User Manual v 1.05

Measurement options • 47

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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

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