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Important features :
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The new SMP 12 is a innovating ISO 9060:2018 - spectrally flat fast response, Class A (formerly ISO 9060:1990 Secondary Standard) Smart pyranometer that combines solid-state dome heating, with no moving parts and best-in-class surge protection to maximize accuracy and minimize maintenance.
The SMP 12 combines proven sensor and diffuser technology from the RaZON+, PH1 and PR1 radiometers with an enhanced version of the Smart interface and the low maintenance.
The SMP 12 has an internal drying cartridge that will last for at least 10 years. This reduces maintenance significantly.
Additional features are:
- Tilt sensor to enable remote checks of whether the pyranometer mounting alignment has been disturbed.
- Internal humidity monitor to provide confidence that the sealing has not been compromised, for example by an accidental impact.
The SMP 12 has a 2-wire RS-485 Modbus® RTU interface but, unlike the other SMP models, it does not have an analog output. The characteristics of the thermopile detector provide a fast response time of less than half a second. The wide power supply range from 10 to 30 VDC makes integration into solar energy plant performance monitoring stations easy. SMP 12 has class-leading electrical protection: 2-stage surge and reverse polarity on the power input and 3-stage surge protection on the RS-485 data lines.
Like all SMP series pyranometers, the calibrated sensitivity is stored in memory and the Modbus® irradiance value is directly in W/m². Pyranometers can be exchanged or recalibrated and no changes in the plant monitoring data logger or SCADA system are needed.
SmartExplorer Windows™ software for data logging, display of data and Modbus® address setting can be downloaded on the Kipp & Zonen / Ott HydroMet webpage.
Specifications
| Spectral range (50% points) | 285 to 2750 nm |
| Response time (63%) | 0,15 s |
| Response time (95%) | 0,5 s |
| Zero offset A | < 1 W/m² |
| Zero offset B | < 1,5 W/m² |
| Total zero offset including the above | < 3 W/m² |
| Directional response (up to 80° with 1000 W/m² beam) | < 10 W/m² |
| Temperature dependence of sensitivity (-10 ºC to +40 ºC) | < 1 % |
| Temperature dependence of sensitivity (-40 °C to +70 °C) | < 2 % |
| Digital output | 2-wire RS-485 |
| Overall accuracy |
± 2 % |
