精密太陽輻照度計關(guān)鍵技術(shù)介紹:
精密太陽輻照度計的精密輻射傳感器是世界氣象組織(WMO)輻射表,用于測量太陽和天空輻射,適應(yīng)很寬的波長范圍。它由一個組合熱電堆電路組成,可以很好的機械震動和打擊。傳感器的接收器有一層Parson黑漆,底部為一個半球型玻璃頂罩。玻璃半球使用的是WG295玻璃,對于0.285-2.8um的波長具有好的透光性,而且能量傳輸?shù)木?。對于一些的?yīng)用,其它的schott玻璃和Infrail II石英玻璃也可以使用。該公司的該是世界氣象組織(WMO)的輻射表,設(shè)計用于測量太陽總輻射。傳感器包括一個水平調(diào)節(jié)裝置,一個水平泡和水平調(diào)節(jié)螺栓以及一個干燥器。傳感器的外殼為鑄造青銅體,外層為白色琺瑯遮蔽盤,傳感器的標定可溯源WRR,含溫度補償曲線。
特點:
量化太陽對地面的可變輻射、計算太陽輻射通量
技術(shù)參數(shù):
靈敏度:大約9um/Wm-2
阻:大約650歐姆
溫度依賴性:+-1%@-20-40
線性:+-0.5%@0—2800Wm-2
相應(yīng)時間:1s(1/e信號)
余弦響應(yīng):+-1% @0-70度天頂角;+-3% @70-80度天頂角
機械振動:大至20 g's壞
標定:半球積分; 尺寸:直徑5.75英尺,高度3.75英尺; 重量:7磅
:標定的為+-3—4%,標定的相對大約為+-2%。真實的余弦響應(yīng)背離是由于標定的大誤差。
現(xiàn)場的使用性能
由于該的靈敏度長時間使用后會有所降低,因此推薦每年都進行標定。標定一個輻射傳感器的,好的方法是測量來自一個腔體表的直接光束輻射和散射輻射,黑白輻射表需要一個遮蔽盤。直接輻射在地平面以上發(fā)生,散射輻射值可以增加獲得總輻射的好評估。
There are two generally accepted Clification Systems used for Pyranometers. ISO clifies pyranometers as a “Secondary Standards”, “First Cl” or “Second Cl” while WMO uses “High Quality”, “Good Quality” and “Moderate Quality”.
The Precision Spectral Pyranometer, is clified as a ISO Secondary Standard or WMO High Quality Pyranometer.
· Clification: ISO Secondary Standard Pyranometer / WMO High Cl
· Response time: 1 second (1/e signal).
· Response Time (95%): 10-15 seconds
· Zero Offset to 200 Wm-2 net radiant loss to sky: 4-6 Wm-2
· Zero Offset to 5° C/hr change in ambient temperature: 1-2 Wm-2
· Resolution: < 1 Wm-2
· Non-Stability: <0.5% / yr (tical)
· Non-Linearity: ±0.5% from 0-2800 Wm-2
· Directional Response: < 10 Wm-2
· Spectral Selectivity: 1%
· Temperature Response: ±1%
· Tilt Response: < 0.5%
· Achievable Uncertainty (Hourly): 1-2 %
· Achievable Uncertainty (Daily): 1-2 %
· Suitable Application: Working Standard or Network Measurements
· Sensitivity: approx. 9 μV/Wm-2.
· Impedance: approx. 650 Ohms.
· Temperature Dependence: ±1% over ambient temperature range -20 to +40°C
· (temperature compensation of sensitivity can be supplied over other ranges at additional charge).
· Linearity: ±0.5% from 0 to 2800 Wm-2.
· Cosine:
o ±1% from normalization 0-70° zenith angle;
o ±3% 70-80° zenith angle.
· Mechanical Vibration: tested up to 20 g's without damage.
· Calibration: integrating hemisphere.
· Size: 5.75 inch diameter, 3.75 inches high.
· Weight: 7 pounds.
· Orientation: Performance is not affected by orientation or tilt.
· A calibration certificate traceable to the World Radiation Reference and a temperature compensation curve is included.
(技術(shù)資料中文版供參考,具體請以以上英文版本為準)