太陽光センサ / SP230-L
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This product is no longer available and has been replaced by: SP230SS.
SP230-L Heated Pyranometer
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概要

The SP230-L pyranometer, manufactured by Apogee, includes a 0.18 W internal heater and an elevated base that allow it to provide solar radiation measurements during the most severe weather. Its small heater draws just 15 mA of current, allowing it to be powered by a small solar panel and battery─even on days with a short duration of daylight and at high latitudes (far away from the equator).

Note: In the image, the SP230-L is shown mounted to a 18356 Leveling Base and a CM225 Solar Sensor Mounting Stand. 

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利点と特徴

  • Designed to prevent snow, frost, and dew accumulation
  • Heater uses 1/80th of the power that other heated pyranometers use, making it ideal for remote battery-powered applications
  • Measurement waveband of 360 to 1120 nm
  • Compatible with most Campbell Scientific data loggers
  • Dome-shaped head prevents water from accumulating on the sensor head

イメージ

The SP230-L mounted to a 18356 Leveling Base and a CM225 Solar Sensor Mounting Stand (sold separately)
The SP230-L mounted to a 18356 Leveling Base and a CM225 Solar Sensor Mounting Stand (sold separately)
The SP230-L mounted to a 18356 Leveling Base and a CM225 Solar Sensor Mounting Stand (sold separately)

詳細

The SP230-L uses a silicon photovoltaic detector mounted in a cosine-corrected head to provide solar radiation measurements. It is calibrated against a Kipp & Zonen CM21 thermopile pyranometer to accurately measure sun plus sky radiation for the spectral range of 360 to 1120 nm. The SP230-L outputs a millivolt signal that Campbell Scientific data loggers can measure.

Note: Sensors calibrated to the 360 to 1120 nm spectral range should not be used under vegetation or artificial lights.

仕様

Light Spectrum Waveband 360 to 1120 nm (wavelengths where response is 10% of maximum)
Measurement Range 0 to 1750 W/m2 (full sunlight ≈1000 W/m2)
Heater 780 Ω, 15.4 mA current drain, 185 mW power at 12 Vdc
Absolute Accuracy ±5% for daily total radiation
Sensitivity (0.2 mV/W/m2)
Calibration Factor 5 W/m2/mV
Cosine Response ±5% at 75° zenith angle; ±1% at 45° zenith angle
Temperature Response -0.04 ±0.04% per °C
Long-Term Stability < 2% per year
Operating Temperature Range -40° to +70°C
Relative Humidity Range 0 to 100%
Diameter 3.15 cm (1.24 in.)
Height 12.75 cm (5.02 in.)
Weight 142.0 g (5.01 oz) with 2 m (6.56 ft) cable

互換性

Mounting

Accurate measurements require the sensor to be leveled using a 18356 leveling fixture. This leveling fixture incorporates a bubble level and three adjusting screws. The 18356 mounts to a crossarm using the CM225 mounting stand. The SP230 should be mounted away from all obstructions and reflective surfaces that might adversely affect the measurement.

ドキュメント

よくある質問

SP230-Lに関するよくある質問の数： 1

  1. サーモパイル計測器の使用に関連する一般的な問題は何ですか?

    IR 放射の損失のため、ほぼすべてのサーモパイル計器には通常、負のオフセットがあります。このオフセットは夜間に最も目立ち、ゼロではなく小さな負の値が読み取られます。この同じオフセットは日中にも存在しますが、太陽信号が大きいため目立ちません。

    もう 1 つの一般的な問題は、計器の水平調整です。サーモパイル計器の水平調整では、コサイン応答が正しくないため、直接ビーム成分にエラーが発生する可能性があります。太陽が地平線に近い場合、角度が非常に浅いため、これらのエラーはより顕著になります。

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