SMP 3 - Smart pyranometer ISO second class

Important features :

ISO 9060 Second Class
0 to 1 Volt or 4 to 20 mA analogue output
No change of desiccant for 10 years
Active temperature correction from -40°C to +80°C
5 year warranty

The SMP 3 is a smart pyranometer with low maintenance and industry standard digital and analogue amplified outputs. Based on the proven CMP 3 technology the SMP 3 adds 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 SMP’s have identical sensitivity and connections exchanging instruments during recalibration is easy.

SmartExplorer Windows™ for data logging, display of data and Modbus® address setting is provided as standard.

SMP 3 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.

Specifications

Spectral range (50% points)	300 to 2800 nm
Response time (63%)	1,5 s
Response time (95%)	12 s
Zero offset - thermal radiation (at 200 W/m²)	< 15 W/m²
Zero offset - temperature change (5 K/h)	< 5 W/m²
Directional response (up to 80° with 1000 W/m² beam)	< 20 W/m²
Temperature dependence of sensitivity (-20ºC to +50ºC)	< 3%
Analogue output (-V version)	0 - 1 V (-200...2000 W/m²)
Analogue output (-A version)	4 - 20 mA (0...1600 W/m²)
Digital output	2-wire RS-485
Overall accuracy	± 10%