Smart Pyranometers THE MORE INTELLIGENT WAY TO MEASURE SOLAR IRRADIANCE Enhanced performance by digital signal processing RS-485 serial data interface with Modbus® protocol 0 to 1 V voltage output 4 to 20 mA current output Extremely low power

Introduction Solar radiation drives almost every dynamic process on the Earth’s surface and above, from ocean current circulation to the weather, and life itself. Precise long-term measurements of the radiation budget at the surface are fundamental to understanding the Earth’s climate system and weather forecasting, and are important in agriculture, hydrology and ecology. Accurate solar radiation data has also become crucial information in solar energy and other industrial applications. Kipp & Zonen has been manufacturing pyranometers for over 80 years. These instruments are designed for measuring...

Choice of pyranometer To achieve the required spectral and directional characteristics SMP Series pyranometers use thermopile detectors and glass domes. SMP3 and SMP11 both have built-in bubble levels and adjustable levelling feet. Snap-on sun shields reduce solar heating of the housings. The waterproof connectors have gold-plated contacts and are tted with 10 m of high quality signal cable as standard. SMP3 and SMP11 come in two versions; ‘-V’ with a 0 to 1 V analogue output, and ‘-A’ with 4 to 20 mA. Both versions have the Modbus® interface, very low power requirements and are supplied with...

Second Class Secondary Standard Zero offsets (a) thermal radiation (200 W/m²) (b) temperature change (5 K/hr) Non-stability (change/year) Directional error (up to 80 ° with 1000 W/m² beam) Temperature dependence of sensitivity Analogue output Analogue output range Digital output Digital output maximum range Digital communication protocol Level accuracy Other specications Operating temperature Spectral range (50 % points) Supply voltage Expected daily uncertainty Calibration certicate traceable to WRR, multi-language instruction sheet, manual on CD-ROM Calibration certicate traceable to WRR, multi-language...