Datasheet: Sun Tracker EKO STR series

Ammonit Measurement GmbHWrangelstrasse 100, D-10997 Berlin, GermanyT: +49 30 6003188-0, E: info@ammonit.commeasuring wind powerwww.ammonit.com• Accurate pointing by simultaneously working sun-sensor and calculation mode• Integrated sun sensor for accurate tracking and easy alignment• Self installation by build-in GPS receiver• HarmonicDrive® gear system for high durability• Low power consumption - only 10W for DC models• AC and DC models availableSun Tracker EKO STR-21G / -22G S64730 / S64740 / S64710 / S64720DescriptionEKO Instruments high precision STR sun trackers provide high tracking reliability, enhanced functionality with fully automated set up procedure through a built in GPS receiver. The compact sun trackers are perfectly suited to support all kinds of measurement sensors to measure global, diffuse and direct radiation. The sun trackers come with a small tripod that offers a stable surface for the measurement equipment and adjustable pyrheliometer mount for the fine alignment. Various mounting kits are available to accommodate the MS pyranometer series or other types of pyrheli-ometers.From sun rise to sun set the compact EKO sun tracker guarantees accurate sun tracking and pointing of the attached solar sensors. The 2-axis tracker automatically adjusts to the sun’s position by the sun sensor closed-loop control sys-tem, even if the tracker is not oriented or leveled properly. When the sun is absent the sun tracker will follow the solar path by accurately calculating its position. As soon as the sun appears the radiometers will be in the proper position to capture radiation. The STR-series can be fully controlled through the so called open command protocol, which gives the flexibility to monitor and control its position by sending the operating commands. When AC power is not available on site a 24 VDC low power version can be used to run the EKO sun tracker from a solar powered battery system. Due to its efficient motor / Harmonic Drive® design, the power consumption is only 10W for STR-21G and STR-22G (DC models). Harmonic-Drive® is one of the most reliable zero backlash drive systems which does not require any maintenance.SchematicAmmonit Measurement GmbHWrangelstrasse 100, D-10997 Berlin, GermanyT: +49 30 6003188-0, E: info@ammonit.commeasuring wind powerwww.ammonit.comSun Tracker EKO STR-21G / -22G S64730 / S64740 / S64710 / S64720SpecificationsSun Tracker STR-21G Sun Tracker STR-22GOrder No. AC model: S64730DC model: S64740AC model: S64710DC model: S64720Torque 12Nm 24 (12+12) NmMotor Stepping MotorDriving method HarmonicDrive®Accuracy <0.01° (Solar Elevation 0 ... 87°)Angular resolution 0.009°Rotation angle Elevation-angle (-15 ... +95°)Azimuth-angle (0 ... 180°)Payload 7kg balanced 15kg balancedSun-sensor tracking accuracy ±0.01°Sun-sensor field of view ±15° (Full view 30°)GPS sensor positioning start time ~5min (depends on the receiving condition)Operating temperature -40 ... +50°C (-30 ... +50°C at cold start)Communication RS232C, 9600bps, 8N1Power consumption AC model: 100 ... 240V AC, 50/60Hz, 13WDC: model: 18 ... 30V DC, 10WProtection IP65Dimension (main body + tripod) 430 x 380 x 440mm (WDH) 430 x 380 x 440mm (WDH)Weight (main body + tripod) 14.5kg 15.5kgCable length 10m 10mLast Modification: 03 April 2013 Power supplyAC PowerDC Power