Solarmeter 10

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Applications

• Monitoring Visible Light Intensity and Aging

• Measuring Solar PV Panel Input

• Measuring Outdoor Solar Irradiance

• Estimating PV Array Power Output

Features and Benefits

• Compact, Handheld, and Durable

• Simple Single-Button Operation

• WRR Traceable Accuracy

• LCD Display

• Made In USA

Handheld Digital PV Radiometer

with Integral Sensor

Sensor

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 UV 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 UV 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

approximately 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.

• Reorient 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.

Solarmeter Model 10.0

Global Solar Power Meter • 0-1999 W/m²

100 East Glenside Avenue • Glenside, PA 19038 • USA • P 1.215.517.8700 • F 1.215.517.8747

www.solarmeter.com • info@solarmeter.com • www.youtube.com/user/SolarLightCoInc

100 East Glenside Avenue • Glenside, PA 19038 • USA • P 1.215.517.8700 • F 1.215.517.8747

www.solarmeter.com • info@solarmeter.com • www.youtube.com/user/SolarLightCoInc

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. Fig. 1. Model 10.0 Spectral Response

Solarmeter Model 10.0

Global Solar Power Meter • 0-1999 W/m²

Solarmeter Specifications

Radiometer

Model 10.0

Irradiation Range 0-1999 W/m² Visible+NIR

Peak Response 940 nm

Bandwidth 400-1100 nm Visible+NIR

Resolution 1 W/m²

Conversion Rate 3.0 Readings / Sec

Display 3.5 Digit LCD

Digit Size 0.4” / 10.2 mm

Operational Temperature +32o-100oF / 0o-37.8oC

Operational Humidity 5% to 80% RH

Accuracy ± 5% Ref. WRR

Dimensions 4.2L x 2.4W x 0.9D in /

106.7L x 61W x 22.9D mm

Weight 4.5 oz / 128 g Including Battery

Power Source 9-Volt DC Battery

Lens UV Glass

Diffuser Teflon

Detector Silicon Photodiode

Agency Approval CE Mark

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.

Rev: SM Model 10.0 Meter_12/2016