Large Area Pulsed Solar Simulation
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Large Area Pulsed Solar Simulator (LAPSS II) Benefits ■ This pulse simulator permits you to test large solar panels at a fraction of the cost of steady state solar simulators. ■ Allows you to repeat the test without changing the temperature of the solar cells (no need for thermocouple testing). ■ You don’t need to perform any adjustments to maintain beam uniformity which is a function of the distance of the target plane to the lamphouse. ■ The spectrum is produced by the current density in the lamp. You don’t need sophisticated spectral Features ■ You can rearrange components according to your changing needs (lamphouse can be mounted on the ceiling to save you space). ■ Provides for measurement of the current-voltage characteristics of solar arrays as large as 5 m (16 ft) in diameter. ■ Very low level of maintenance required. You can change the lamp in only 1 to 2 hours. ■ The new multiple pulse mode allows accurate testing of solar cells with long storage times, such as Back Surface Field cells. Product Description ■ Lamphouse: Projects a uniform light pulse simulating sunlight in spectrum and intensity. ■ Control Unit: contains electronic load with signal scaling and conditioning, safety interlock and pulse intensity control. ■ Data Acquisition Unit: performs data acquisition and A/D conversion of light intensity, panel voltage, panel current and temperature data in addition to distributing control signals. ■ Peripherals: IBM compatible computer system with hard disk and floppy disk performs system control, data reduction and output to video monitor and printer. Laserjet printer for hard copy of data and systems. ■ Pulse Forming Network (PFN): produces current pulse to power the lamphouse. ■ Measures a minimum of 40 data points per pulse and up to 200 data points in multi-pulse mode. ■ Includes an Electronic Load capable of biasing the test specimen in a continuous sweep from short circuit to open circuit. ■ Capable of biasing operator selectable segments of the I-V curve between short circuit and open circuit (for multi-pulse testing). ■ Xenon lamp current density has been selected for best match to solar spectrum as per NASA Space Vehicle Design Criteria SP8005 (May 1971). ■ Optional: Extended range accessory units are available. Accessory external loads increase the current or voltage range to 200 Volts or 50 Amps. Call for details. Spectrolab Inc. 12500 Gladstone Avenue, Sylmar, California 91342 USA • Phone: 818.365.4611 •

System Specifications Test Plane Area 5 m (16 ft) diameter at 13 m (42 ft) from Lamphouse Test Plane Irradiation Uniformity Without Optional Uniformity Screen With Optional Uniformity Screen ±3% inside 5 m diameter (16 ft) N/A Current/ Voltage Measurement Resolution 0.025% Pulse to Pulse Data Repeatability <±1.0% Cycle Time For Single Pulse Take data and graph corrected I-V curve with Isc, Voc, Pmax, V at Pmax, and current at selected voltage test point within 3 minutes Total System Error <±1.5% (excludes dynamic error associated with cells exhibiting long minority...