Delta Electronics SS1-UM-1.05 user manual Glossary

Page 82

F. Glossary

Beam fraction - the fraction of the Total incident PAR in the Direct beam.

Beam Fraction Sensor (BFS) - consists of two PAR sensors and a shade ring, used for measuring Direct and Diffuse light above the canopy.

Beer’s law - a general law describing transmission through an absorbing medium. The intensity falls off exponentially with distance through the medium.

Cosine response - the response of a sensor to a ray of light is proportional to the cosine of the angle of incidence of the ray (measured from the perpendicular to the sensor surface).

CSV (Comma Separated Variable) a file format intended for importing into spreadsheet or database programs. Fields are separated by commas, text is enclosed in quotes.

Data Collection Terminal - the Psion Workabout handheld computer, used for driving the SunScan probe, and presenting and storing the results.

Diffuse light - light scattered in the atmosphere. It is treated as coming from all parts of the sky with equal intensity i.e. a Uniform Overcast Sky.

Direct beam - light coming directly from the sun, with no scattering. Usually treated as if it comes from a point source.

ELADP - see Leaf Angle Distribution

Emulator - a setting in the SunData software that generates random results, regardless of whether a SunScan probe is connected. Useful for learning to use the software.

GMT - Greenwich Mean Time, also called Universal Time (UT). The standard time used for astronomical measurements and calculations.

Hemispherical response - the response of the sensor is equal for all light rays coming from above the plane of the sensor surface, independent of angle.

LAD - see Leaf Angle Distribution. LAI - see Leaf Area Index.

Leaf absorption - the fraction of intercepted PAR that is actually absorbed by the leaf. The remainder is reflected or scattered.

Leaf Angle Distribution - a way of describing the distribution of orientations in space of the canopy elements. We model this using the Ellipsoidal Leaf Angle Distribution, which describes the distribution of canopy elements as in the same proportions as the surface of an ellipsoid. Using this model, a wide range of different canopy types can be described by a single parameter, the Ellipsoidal Leaf Angle Distribution Parameter (ELADP), which is the ratio of the horizontal to vertical axes of the ellipsoid. An ELADP much greater than 1 describes a canopy of mostly horizontal leaves, an ELADP near 0 describes a canopy of mainly vertical leaves.

Leaf Area Index (LAI) - the surface area of leaf per unit of ground area (assuming leaves are flat, and including only one side of each leaf). Instruments like the SunScan cannot differentiate between leaf and stem, so could more correctly be said to estimate Plant Area Index.

82 • Appendices

Document code: SS1-UM-1.05

Page 81 Page 83
Image 82
Page 81 Page 83
Contents SunScan SS1-UM-1.05Trademarks CopyrightAcknowledgements CE conformityContents LAI theory Menus and Screens More Psion and file handling notesMeasurement options Technical Reference sectionAppendices IndexSunScan Canopy Analysis System How to use the manualsIntroduction Organisation of this manualBeam Fraction sensor Field accessoriesSunScan probe Data Collection TerminalPreliminary checks Getting StartedWorkabout and SunScan probe Checking the Workabout hardware SunData s/w Diskette Installing the SunData s/w in your PCInstalling the s/w What the s/w doesSetting up your PCs COM port Running SunDataSunScan probe to PC Communication checksWorkabout to PC Running SunData in Windows About this tutorial SunScan TutorialWorking with the Workabout What to do if you get lost Starting SunData in the WorkaboutUsing a PC instead of the Workabout Starting the PC softwareThis page is intentionally blank Setting up a measurement session Working through the menu optionsFile Saving Hot KeysUsing the Emulator mode Taking readingsConnecting the SunScan probe Without a Beam Fraction SensorConnecting the Beam Fraction Sensor Measuring Leaf Area Index without a Beam Fraction Sensor Reviewing your data file AveragesFrom the Workabout Transferring the data file to your PCTo the PC Initiating the file transfer from the Workabout Meanwhile, on the PC RS232 communication problems Conclusion of the TutorialSunData Screens on the Workabout Menus and Screens SettingsFile Contd UtilsQuit Workabout User Guide More Psion and file handling notesNavigating Psion directories and screens Navigating the Psion directories and screensPsion subdirectory usage in file select dialogs Deleting unwanted Workabout files Re-installing the SunData application iconFlashcards reformatting SunData Configuration files Configuration and data file handlingData memory management Restoring a configuration Default .cfgCreating a configuration file Data files.PRN file Displaying data files on your PC.CSV file Data file layouts and data groups Page Experiment design Measurement optionsAbove-canopy reference requirements Canopy type and BFS practicalities Canopy Sampling volumeCanopy type and LAI estimates Preferred light and weather conditions Planning for the sun’s positionSetting Eladp Advice on Absorption and Eladp valuesAbsorption Relationship between Mean Leaf Angle and Eladp Estimating Eladp in the fieldSunScan System Measurement modes Workabout setupLAI, PAR and All displays Autolog function Probe GO button Measurement procedures in the fieldProbe handling in the field Levelling the probeUse of the tripod Using the tripodBFS handling in the field WorkaboutLevelling the BFS Finding North, and setting the shade ringExtension cables, and the location of the BFS Checking the probe/BFS matching PAR calibrationsFactory light calibration Recalibrate optionEffect of the shade ring on the BFS Routine maintenance and cleaningRestoring the factory calibration Comparing the calibration with other PAR sensorsEnvironmental and moisture protection SunScan probe and Beam Fraction SensorLAI theory Ingredients of the LAI computation methodMajor assumptions Derivation of Wood’s SunScan canopy analysis equationsTheory versus reality Campbells Ellipsoidal LAD equations Beers law for canopy absorptionTransmission of Diffuse Light Transmission fraction τ Is given by I/I0 Modelling the canopy transmission Diffuse light transmission cosine corrected sensorDetail Diffuse light cosine response sensor Functions used to model canopy transmissionAccuracy of LAI calculations Diffuse light hemispherical response sensorModelling incomplete PAR absorption and scattering Exp 0.1 . x . atan 0.9 Atan L Q SpherCalculating zenith angles Scientific referencesSummary Jones, Hamlyn G Plants and Microclimate second edition. CUP Checking the batteries Maintenance and repairTechnical Reference section SunScan probe batteriesChecking the desiccant Checking the PAR calibration Re-setting the factory calibrationFactory calibration method Psion Workabout TroubleshootingProblems running the SunData application While running SunDataInsufficient power to write data reported Technical Support Beam Fraction Sensor type BF1 SpecificationsSunScan Probe Type SS1 Data Collection Terminal type DCT1 Psion WorkaboutSpares Kit type SPS1 Carrying Case type SCC1Telescopic Tripod type BFT1 Logging CablesPAR Performance Spectral responseCosine responses of probe and BFS SunScan system cosine responseAppendices Logging the probe as a Linear Quantum SensorLogging the Beam Fraction sensor Workabout SunData s/w Upgrading the SunScan systemSunData PC s/w Revision HistoryPsiWin File transfer between Workabout and PCChoice of different programs Workabout Remote LinkExample using Slink Slink and RcomDrives on the PC are referred to as REMA, Remc REM = remote Example using Rcom Documentation of Rcom and SlinkSending a file to a Communication program Using the Workabout Comms applicationAlternative file transfer mechanisms Sending a file to a serial printerGlossary Page Index AccuracyIndex Field use 39, 46, 48, 50, 51, 58

SS1-UM-1.05 specifications

Delta Electronics has long been recognized for its innovative solutions in power and thermal management technologies. One of its notable products is the SS1-UM-1.05, a compact and efficient power supply module designed to meet the needs of a variety of applications, from industrial automation to telecommunications.

The Delta SS1-UM-1.05 is a key component in the company’s extensive portfolio, providing reliable and stable power supply for both demanding and sensitive electronic equipment. One of the main features of this module is its high efficiency, which typically exceeds 90%. This not only minimizes energy consumption but also reduces heat generation, making it an ideal choice for applications where thermal management is crucial.

Another significant characteristic of the SS1-UM-1.05 is its wide input voltage range, which allows it to operate effectively in various environments. The module supports a voltage range from 90 to 264 VAC, ensuring consistent performance even in fluctuating supply conditions. This versatility makes it well-suited for global applications, accommodating different electrical standards and requirements.

The SS1-UM-1.05 also boasts a compact footprint, which is essential for space-constrained installations. Its design emphasizes not only performance but also ease of integration into existing systems. The module provides multiple output voltage options, allowing it to cater to specific power requirements, whether it be for industrial machinery or consumer electronics.

In terms of technologies, the SS1-UM-1.05 incorporates advanced power conversion technologies that enhance its overall performance. It features overload protection and thermal shutdown mechanisms to safeguard both the module and the equipment it powers from potential damages due to electrical faults. Moreover, it has low electromagnetic interference (EMI) emissions, which is crucial for environments sensitive to electrical noise.

The SS1-UM-1.05 is also designed with a robust enclosure that adheres to stringent safety and environmental standards. This enhances its durability and reliability, ensuring it can withstand harsh operating conditions. With these features, Delta Electronics demonstrates its commitment to delivering high-quality products that meet the evolving needs of industries worldwide.

Overall, the Delta SS1-UM-1.05 power supply module is an exemplary solution for those seeking a reliable, efficient, and compact power source. Its advanced features and technologies make it an indispensable component in modern electronic systems.
Top Page Image Contents