Photovoltaic Demonstration

PV System - Instrumentation

Outdoor Air Temp
Instrument: Resistance temperature device (RTD)
Manufacturer: Weed Instrument
Model: 743-PB
Location: 1 instrument at BECON and 1 instrument at Southgate facility

Details:
Specification: 3-wire platinum 100 Ohm RTD
Accuracy: +/- 0.3 degrees C @ 0 degrees C

Wind Speed Direction
Instrument: Anemometer
Manufacturer: RM Young
Model: 05103L
Location: 1 instrument at Southgate facility

Details:
Specification: Four blade helicoid propeller anemometer
Output: 4-20 mA
Range: 0-100 m/s (224 mph)
Accuracy: Wind speed: +/- 0.3 m/s (0.6 mph) or 1% of reading; Wind direction: +/- 3 degrees
Threshold: Propeller, 1.0 m/s (2.2 mph); Vane 1.1 m/s (2.4 mph)

Module Temp
Instrument: Resistance temperature device (RTD)
Manufacturer: Weed Instrument
Model: 3304A-01 BH3-Z024
Location: 6 instruments at BECON and 6 instruments at Southgate facility

Details:
Specification: 3-wire platinum 100 Ohm flexible stick-on surface RTD
Dimensions: 1 x 1 inchAccuracy: +/- 0.15 degrees C @ 0 degrees C

Solar Irradiance
Instrument: Thermopile Pyranometer
Manufacturer: Eppley Laboratory
Model: PSP (Precision Spectral Pyranometer)
Location: 1 instrument at BECON and 1 instrument at Southgate facility

Details
Sensitivity: approx. 9 micro-volts per watt per square meter Temperature Dependence: +/- 1% over ambient temperature range
-20 to 40 degrees C
Linearity: +/- 0.5% from 0 to 2800 W per square meter
Cosine: +/- 1% from normalization 0-70% zenith angle;
+/- 3% 70 - 80 degree zenith angle.
Orientation: Performance is not affected by orientation or tilt