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Important features :
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The SMP 22 is a secondary standard pyranometer that combines the new smart interface with quartz domes and sensor technology from the CMP 22. Which has a proven track record of decades, making it the most accurate and reliable pyranometer in the world. The SMP 22 has the widest spectral range, improved directional response, and reduced thermal offsets. Because of the highest optical quality domes the directional error is reduced below 5 W/m2. The SMP 22 is extremely robust and comes standard with RS-485 Modbus® interface and 5 year warranty.
The SMP 22 has internal desiccant that will last for at least 10 years. This minimizes maintenance significantly.
The interval for dome cleaning can be extended, and the quality of measurements maximized, by fitting SMP 22 with the CVF 4 ventilation unit.
The SMP 22 has a digital interface, amplified analogue output, improved response time and individual temperature corrected measurement data. The SMP 22 is supplied with individual measured cosine response data. The wide and low power supply range from 5 to 30 VDC makes integration in meteorological and solar energy stations easy.
Thanks to standardized output and connections of every SMP 22, exchanging instruments for recalibration is easy.
SmartExplorer Windows™ software for data logging, display of data and Modbus® address setting is provided as standard.
Specifications
| Spectral range (50% points) | 200 to 3600 nm |
| Response time (63%) | 0,7 s |
| Response time (95%) | 2 s |
| Zero offset - thermal radiation (at 200 W/m²) |
< 3 W/m² |
| Zero offset - temperature change (5 K/h) |
< 1 W/m² |
| Directional response (up to 80° with 1000 W/m² beam) | < 5 W/m² |
| Temperature dependence of sensitivity (-20ºC to +50ºC) | < 0,3% |
| 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 | ± 1% |
