Compact, Handheld, and Durable
Simple Single-Button Operation
WRR Traceable Accuracy
Made In USA
Monitoring Visible Light Intensity and Aging
Measuring Solar PV Panel Input
Measuring Outdoor Solar Irradiance
Estimating PV Array Power Output
Silicon Photodiode packaged in hermetically sealed glass window cap.
Meter Operation :
To operate your Solarmeter, aim the sensor window located on the top panel of the meter directly at a light source.
Press and hold the push-button switch on the face of the meter. For best results take note of the distance the reading was taken from the source in order to ensure repeatable results.
Battery operation voltage is viable from 9V down to 6.5V. Below 6.5V the numbers on the LCD display will begin to dim indicating the need for battery replacement. Under typical service load a standard 9V battery will last around 2 years.
Proper Usage of Solarmeter® Photovoltaic Radiometer ;
• Wear tinted eyewear or sunglasses when checking intense sunlight.
• Aim sensor directly at sun to see maximum solar irradiance as a reference.
• Aim sensor in same direction as PV panel to see irradiance striking array.
• Re-orient PV panel direction if desired for best average position.
• Maximum solar noon direction will vary throughout the year.
• Do not subject the meter to extremes in temperature, humidity, shock or dust.
• Use a dry, soft cloth to clean the instrument. Keep sensor free of oil, dirt, etc.
Proper Estimation of PV Panel Power :
Before beginning determine the following information from the manufacturer of the module array:
• Effective active area for the PV cells in square meters ____
• PV cells efficiency as percentage of input to output power____%
• DC to AC conversion efficiency of the PV cell modules in the array ____ %
• Record the temperature near the back of the array ____°C
It is best to do this when sun is directly shining on module near noon. Angles 35° and greater from the sun will increase the % error the meter experiences for these kinds of readings.
Example Calculation with PV Meter reading 1000 W/m² perpendicular to 10 m² array at 10 m² active area, 14% cells efficiency, 95% converter efficiency, 40° C:
• Effective active area for the PV cells in square meters 10 m²
• PV cells efficiency as percentage of input to output power 14 %
• DC to AC conversion efficiency of the PV cell modules in the array 95 %
• Record the temperature near the back of the array 40 °C
• Solarmeter Model 10.0 PV Reading 1000 W/m²
(1000 W/m²) x (10 m²) = 10000 W incoming sun power
(10000 W) x (0.14) cell efficiency = 1400 W
(1400 W) x (0.95) conversion efficiency = 1330 W
Typical temperature coefficient loss for PV cells is -0.5%/°C above 25°C
40°C – 25°C = 15°C; (15°C) x (0.5%/°C) = 7.5% or 92.5% efficiency
(1300W) x (0.925) = 1230.25
A small wiring and component loss of ~1% reduces PV output down to ~1218 W.
Energy Production over Time :
The above 1218 Watts value is an “instantaneous” number. Energy is measured in Watt-hours (Wh) or kilowatt hours (kWh) so if the solar irradiance remained constant for an hour near noon, the energy produced would be 1218 Wh.
To estimate power over the entire day take readings every hour and apply the calculations above. Then add up each hour’s value x number of hours for daily Watt-hours. Expect the value to increase during the summer and decrease during the winter.
Irradiation Range : 0-1999 W/m²
Response : 400-1100nm
Resolution : 1 W/m²
Conversion Rate : 3.0 Readings/Sec
Display : 3.5 Digit LCD
Digit Size : 0.4 inch High
Operation Temperature : 32° F to 100° F
Operation Humidity : 5% to 80% RH
Accuracy : ±10% to WRR Ref.
Dimensions : 4.2L x 2.4W x 0.9D (in.)
Weight : 4.5 OZ. (Including Battery)
Power Source : 9-Volt DC Battery
Ordering Information :
Model 10.0 : PV Radiometer :
SOLARMETER®, UV & VISIBLE LIGHT METERS
Solarmeter® is Solar Light Company Inc.'s brand of specialty hand-held light meters. We are the industry leader in the design and manufacture of UV and Visible Light radiometers for measuring lamp irradiance vs aging, as well as other related applications serving the indoor tanning industry, window film tint measurement, outdoor UV Index measurement, UV curing, reptile and sterilization lamp measurement, red/blue light phototherapy, LED measurement, and photovoltaic (PV) solar irradiance metrology. These meters provide long term accurate measurements for both low and high intensity lamp systems, in order to enable output and aging determination. They also measure solar irradiance.
Since 1991, well over 30,000 of these hand-held digital meters have been produced and sold worldwide.
Each Solarmeter® radiometer model comes complete with a carrying case and instruction brochure. Models 4.0 through 9.6 include a NIST-traceable Calibration Certificate, while Model 10.0 includes a WRR-traceable Calibration Certificate.
Generally, lamps need replacement when their output declines 30% (falls below 70% of their new values.) This may occur after anywhere from a few hundred to >1000 hours of use, depending on many various factors. The only way to know for sure is to monitor irradiance with a meter!
Solar Light Company, Inc. is recognized worldwide for over 50 years as America's premier manufacturer of precision ultraviolet light sources, solar simulators, and radiometers. Our standard line of UV, visible, and IR radiometers and light meters measure laboratory, industrial, environmental, and health related light levels with NIST traceable accuracy. Column ozone, aerosol, and water vapor thickness measurements, in addition to long-term global ultraviolet radiation studies all over the world are performed using our atmospheric line of instrumentation. Solar Light also provides NIST traceable spectroradiometric analyses, calibrations for light meters and light sources, OEM instrumentation and monitors, and accelerated ultraviolet radiation degradation testing of materials.
Solarmeter® is a registered trademark of Solar Light Company, Inc.