The scattered radiation meter is composed of a total radiation meter and a light shielding ring. The function of the shading ring is to ensure that it can continuously block the direct radiation of the sun from sunrise to sunset. It can be widely used to continuously measure the scattered radiation intensity of the sky with meteorological stations and scientific research departments. Technical parameter spectrum range: 0.3 ~ 3 µ m measurement range: 0 ~ 2000W / m2 sensitivity: 7 ~ 14 μ V / w • m-2 power supply mode: DC5V output form: 0 ~ 2.5V response time: < 35S (99% response) annual stability: no more than ± 2% cosine response: no more than ± 7% (when the solar altitude angle is 10 º) azimuth: no more than ± 5% (when the solar altitude angle is 10 º) nonlinearity: no more than ± 2% temperature coefficient: no more than ± 2% (- 10 ~ 40 º C) latitude scale range: 0 ~ 50 ° red latitude range: ± 25 ° ring diameter: Φ 400 weight: 15kg load capacity: current type output impedance RL ≤ 300 Ω, voltage type output impedance RL ≥ 1K Ω working environment: temperature - 50 ℃ ~ 85 ℃, humidity ≤ 100% RH