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STR-22G Double Arm Sun Tracker

Reference STR-22G

Manufacturer: Eko Instruments

Condition: New

Easy and accurate set up by automatic retrieval of position and time (GPS)
Standard Integrated Sun sensor for accurate tracking and easy alignment
Optional shading assembly
Easy installation and operating without need of a computer
Continuous clock synchronization enabling permanent reliable and accurate positioning of the solar radiometers measuring direct, diffuse and global irradiance
RS-232 serial interface for extended position control and status information

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Specifications
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The compact sun tracker are perfectly suited to support all kinds of Global, Diffuse and Direct Radiation measurement sensors. Besides the standard EKO sensor mounts various mountings are available. EKO Instruments improved STR-22G Sun Tracker with fully automated set up procedure through a GPS receiver providing increased reliability and enhanced functionality.

From sun rise to sun set the compact 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 system, even if the tracker is not oriented or leveled properly.

The Sun Tracker comes with a small tripot that offers a stable surface for the measurement equipment. 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.

Model	STR-22G Double Arms
Motor	Stepping motor
Driving technology	Harmonic Drive
Pointing accuracy	< 0.01° (Solar Elevation: 0 to 87°)
Angle resolution	0.009°
Rotation angle	Elevation-angle(-15° to +95°) Azimuth-angle(0° to +/-180°)
Torque	24 (12+12) Nm
Payload	20kg balanced
Tracking mode	Sun-sensor mode and Calculation mode are automatically switched.
Tracking accuracy of Sun-sensor mode	0.01°
Sun-sensor field of view	+/- 15°
GPS Sensor measurement accuracy	Horizontal Position: Below 15m (2drms). GPS Positioning
GPS Sensor positioning start time	< 5min. (depends on the recieving condition.)
LED Indicator	Power, GPS status
Environmental Protection	IP65
Temperature range	-40~+50°C (-30 ~ +50°C at cold start)
Altitude for solar position calculation	No Limitation
Communication	RS-232C, 9600bps, 8N1
Power requirement	AC100 to 240V, 50/60Hz, 20W DC21 to 32V, 20W for DC optional Sun Tracker (*Power consumption <10W)
Dimension	430(W) x 380(D) x 440(H) mm
Weight	15.5 kg

Standard STR-22G Sun Tracker system includes

Double arm STR-22G Tracker with built in GPS
Four Quadrant Sun Sensor which automatically compensates for mechanical misalignment
Pyrheliometer Mount (suitable for any pyrheliometer model)
Levelling Tripod with spirit level
Diagnostics and control software