Daystar, Inc. DS-05A Digital Solar Meter

Daystar, Inc.
DS-05A Digital Solar Meter

The Daystar Solar Meter provides an accurate reading (3%) from 0 - 1200 Watts/m² when pointed at the sun. Resolution is 1 W/m², maximum display reading is 1999. The irradiance value is presented on a 0.75" easy-to-read LCD display. The Daystar Solar Meter is (2.5" x 4.5" x 1.0" inches) (6.4 x 11.4 x 2.5 cm) and weighs (less than 5 ounces) (140 g) with the 9-V battery installed.

PV Sensor: The meter uses a polycrystalline silicon PV cell located behind a plastic diffuser as the sensor. The cell is mounted on the top end of the meter, perpendicular to the display. The sensor responds to a spectrum bandwidth of approximately 0.3-1.1 microns. The meter is intended for outdoor measurements of natural sunlight.

Meter Calibration: Meters are calibrated on clear days in natural sunlight and adjusted to a reference cell periodically calibrated with pyranometers at Sandia National Laboratories. Meters are pointed directly at the sun for calibration with the plastic protection cover in place. Off-angle calibration is not done. However, empirical data indicate meter-to-meter performance remains consistent up to 40 degrees off-angle from the direct normal. Beyond 40 degrees the readings start to diverge and may reach 10 - 15% when pointed 70-80 degrees away from the sun. The meters are calibrated in groups and records for individual meters are not maintained.

Care of your Meter: Daystar Solar Meters are designed for use in the field but you should treat them as you would your voltmeter; avoid dropping them, do not leave them out in the rain. They are not sealed for continuous exposure to weather. The LCD display may darken if exposed to direct sunlight for a prolonged period.

Meter Repair: We stand behind our products. If your meter is damaged or malfunctions, contact Daystar for instructions about repair or return. A repair charge may assessed if your meter is more than one year old.