The SMP3 is a smart pyranometer with low maintenance and industry standard digital and analogue amplified outputs. There is no need for an AMPBOX interface either as the -A version can be configured for: 4 to 20 mA.
Based on the same proven technology as the CMP 3 the SMP3 adds a Modbus® interface, improved response time and temperature corrected measurement data.
The wide and low power supply range from 5 to 30 VDC makes integration in meteorological stations easy. The SMP is protected against over voltage, reversed polarity and short circuiting. Because all SMPs have identical sensitivity and connections exchanging instruments during recalibration is easy.
PC Software for data logging, display of data and Modbus® address setting is standard provided.
SMP3 measures global solar radiation on a horizontal plane. When tilted with the same angle as a PV panel it measures the tilted global radiation, for PV module efficiency calculations.
Spectral range 300 to 2800 nm
Response time (63%) < 1.5 s
Response time (95%) < 12 s
Zero offset A < 15 W/m²
Zero offset B < 5 W/m²
Directional error (up to 80 ° with 1000 W/m² beam) 20 W/m²
Temperature dependence of sensitivity (-20 ºC to +50 ºC) < 3 %
Analogue output (-V version) 0 to 1 V
Analogue output (-A version) 4 to 20 mA
Digital output 2-wire RS-485