Sunscan data sheet, low res, 4 x A4 sides
Contents
1. able to make the full range of SunScan The Standard System comprises the SunScan measurements including LAI The probe has to serve as its own Probe SunData Software and PDA above canopy reference so requires steady light conditions SS1 ELS1 Entry Level System The lowest cost version of SunScan The Entry Level System has all the functionality of the Standard System but runs on the user s own PDA requires a PDA with Windows Mobile 5 or higher that can connect to the SunScan Probe s 9 pin RS232 D connector The Entry Level System includes the SunScan Probe and SunData Software only SunScan Canopy Analysis System SunData software modelling R y Diffuse Direct SunScan uses a sophisticated model of light transmission through a uniform Light solar canopy based on work by Campbell 1985 and Norman and Jarvis 1975 beam and taking into account the following factors e Direct amp Diffuse incident light e Leaf PAR absorption e Canopy Leaf Area Index e Solar zenith angle e Canopy Leaf Angle Distribution Transmitted fraction Upwelling scattered light wm Canopy layer Je wxe Ee ELADP x ZN Direct beam scattered Solar zenith angle is calculated from the actual time latitude and longitude Diffuse light Leaf Angle Distribution and Leaf Absorption are estimated by the user Scaled CER All other variables necessary to calculate LAI are measured directly Because the re2. but fall off at the extremes of the range Under most normal daylight conditions errors due to the deviation are small but it is possible for example under artificial light to find larger errors in the absolute values measured Because the BF3 Sunshine Sensor and SS1 Probe are closely matched this has minimal affect on the canopy calculations which are based on ratios of incident and transmitted light Radio Link and PDA upgrades SunScan systems with the previous Data Collection Terminal type DCT2 can be upgraded to the new RPDA1 with the benefit of improved ruggedness and full Windows Mobile capability SunScan systems can also be upgraded to full radio link capability this requires returning the SunScan Probe to Delta T for modification Please enquire for details amp PEE Ca ih 4 Pi se m baT Delta T can also supply HemiView a system for obtaining and processing hemispherical images of plant canopies If your research involves high irregular canopies such as forests please download a HemiView data sheet Delta T Devices Ltd 130 Low Road Burwell Cambridge CB25 OEJ UK Tel 44 1638 742922 Fax 44 1638 743155 sales delta t co uk www delta t co uk SS1 DS 6 June 2008
3. umol m s total amp diffuse PAR 400 700 nm Power 4x AA Alkaline cells lifetime up to 1 year 5 15V DC powered from SunScan 120mm x 122mm x 95mm 556g Optional items Holster belt for PDA and SS1 type SS HB1 for hands free operation of PDA type RPDA1 and temporary parking of the SunScan Probe Extension cables for BF3 with connectors 10m cable type Rugged PDA type RPDA1 Screen VGA sunlight readable Operating system Windows Mobile 6 BFXL10 25m cable type BFXL25 50m cable type BFXL50 Logger cable type BFDL5 for BF3 Sunshine Sensor 3 channels Cable terminates in bare wires For use with IP67 30 C to 60 C 1 2m drop test connected to a data logger not for use with RPDA1 Rechargeable battery 12h continuous use For spares recalibration and consumables please enquire gt 100 MB available Size amp Weight 165mm x 95mm x 45mm 450g a LAI data logger not with SunScan Probe Display options b PAR average Logger cable type SSDL10 for SunScan Probe enables c ALL individual sensor readings SunScan to be used as a Linear Quantum Sensor when Wb 5 al a 7 SCCt Carrying Case nS Calibration ae ST The SunScan Probe SS1 and Sunshine Sensor BF3 are et calibrated under a standard light source against an accurate PAR quantum sensor traceable to national standards The spectral and cosine responses of the sensors approximate to the ideal response graphs available on request
4. SunScan Canopy Analysis System type SS1 Portable canopy analysis system for crops SunScan uses field measurements of PAR in crop canopies to provide valuable information about Leaf Area Index and biomass production E Measures incident and transmitted PAR in plant canopies E Direct display of Leaf Area Index LAI E Unique BF3 Sunshine Sensor reference measures Direct and Diffuse components of incident light Usable in cloudy clear and changeable conditions E Portable weatherproof and battery powered Introduction a SunScan is a simple and flexible system for measuring and a analysing the incident and transmitted Photosynthetically Active Radiation PAR within crop canopies It provides vital information about the penetration of PAR into crops and is essential in work such as comparative crop studies for SunScan Probe separating out the effects of cultivar and treatment It is particularly well suited to low regular canopies The probe has an array of 64 PAR sensors as found in many agricultural crops embedded in a 1m long probe and is connected via an RS 232 cable to a handheld PDA As a reading is taken all the sensors are scanned and the measurements are transmitted to the PDA The average light level along the probe is calculated and all of the individual sensor readings are available if required for detailed PAR mapping An operating button on the probe handle enables successive readings to be taken qu
5. ickly and simply on demand Alternatively unattended logging can be conducted under program control from the PDA Readings are in units of PAR quantum flux umol m s and units of LAI m m SunScan users don t have to wait for special weather conditions the probe can be used in most light conditions but best near mid day Main SunScan components and their connections SunScan Canopy Analysis System lt a SunScan Probe radio version and PDA with radio linked BF3 Sunshine Sensor mounted on tripod SunScan System choices SunScan is modular and expandable Researchers can specify a system that suits their own performance requirements and budget System type Features and advantages SS1 COM Complete System The full system provides a powerful canopy analysis tool It can This is the complete package of SunScan items instantly calculate LAI measure PAR interception using either spot including SunScan Probe SunData Software PDA readings or unattended logging and measure sunflecks Sunshine Sensor type BF3 tripod and carrying case SS1 COM R4 Complete System with The radio link has a range of 100 to 200m and replaces the cable Radio Link between the SunScan Probe and BF3 particularly useful in taller Includes a radio link between the modified SunScan Canopies or where readings are required at widely spaced Probe and the BF3 Sunshine Sensor locations SS1 STD3 Standard System The Standard System is
6. lative contributions of direct and diffuse incident light are measured at the same time as the transmitted PAR readings can be made scattered light in a wide range of daylight conditions However we advise against taking a P Downwelling YN FF SF Ss Attenuated Direct beam Diffuse and measurements when the sun is strong and near the horizon when large errors may occur The assumptions and calculations made in the SunData Software are fully explained in the user manual along with practical advice on how to use the system effectively Sunshine Sensor type BF3 Be SunScan features a unique p optional reference sensor i which measures the direct and diffuse components of light simultaneously above the canopy The special shading pattern of the dome is matched to an array of photodiodes in such a way that at least one photodiode always sees an Data analysis and storage Rugged PDA type RPDA1 The RPDA1 is an exceptionally robust handheld PDA which collects and analyses readings from the SunScan Probe Raw readings and derived functions such as LAI can be displayed reviewed and stored in the field by the SunData Software groups of readings can be averaged if required Readings are stored in the internal memory which holds gt 1 million readings or in widely available CompactFlash cards which provide removable data storage Collected data can be transferred easily to a PC Rugged PDA with the Holster bel
7. ons SunScan Probe type SS1 Serial interface RS232 9 pin female D connector Environmental IP65 0 60 C working temp All systems are based on the main components listed below SunScan Complete System type SS1 COM SunScan Probe SDA2 SunData Software RPDA1 Sunshine Sensor type BF3 with cable type BFXL10 Tripod and Carrying Case SunScan Complete System with Radio Link type SS1 COM R4 as above with BF RL4 and SS1 RL4 SunScan Standard System type SS1 STD3 SunScan Probe SDA2 SunData Software and RPDA1 SunScan Entry System type SS1 ELS1 SunScan Probe plus SDA2 SunData Software requires a compatible PDA for readout and data collection Main components SunScan Probe type SS1 including alkaline batteries and user manual technical manual on CD SunData Software type SDA2 Rugged PDA type RPDA1 Recon X Series PDA including rechargeable battery comms cable and carrying case Sunshine Sensor type BF3 including user manual NB requires cable type BFXL10 for use with SunScan Probe or type BFDL5 for use with data logger see below Telescopic Tripod type SS TD for mounting BF3 Carrying Case type SCC1 for SunScan Probe and accessories Size amp Weight 1300 I x 100 w x 130 h 1 7kg 4 x AA Alkaline cells lifetime up to 1 year Sunshine Sensor type BF3 Output sensitivity PE l total amp diffuse 1 mV umol m s PAR cosine corrected Total t 12 10 mol m s 20 to 50 C with alkaline batteries 0 2500
8. t tyoe SS1 HB1 unobstructed solar disc and at least one is always in full shadow The BF3 uses this information to calculate whether the sun is shining and to measure the direct and diffuse components of solar radiation avoiding the need for the shade lt ring adjustments required with conventional diffuse light sensors levelling is the only adjustment required 1 Patent numbers EP 1012633 US 6417500 Unattended logging with RPDA1 The SunData Software can automatically take readings and averages from the SunScan Probe at user defined intervals from 1 second to 24 hours This can be used for example to obtain diurnal readings of canopy light interception at a particular location Use with a data logger The SunScan Probe can be connected directly to a data logger for use as a Linear Quantum Sensor When powered by the logger it outputs a voltage proportional to the average PAR incident on the probe See Ordering Information for suitable cables Radio Link The radio link connects the SunScan Probe and the BF3 reference sensor eliminating the need for a long connecting cable The link operates over the 434MHz licence free frequency and can transmit up to 250m line of sight or 100m to 200m in vegetation The Radio Link system comprises an add on module for the BF3 reference sensor BF RL4 and a specially modified SunScan Probe SS1 RL4 Ordering information SunScan systems SunScan specificati
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