The main fields of application of our reference radiometers are meteorology/climatology and solar energy. Our high precision reference radiometers serve as standards for the calibration of field instruments for solar irradiance measurements such as pyranometers and pyrheliometers.
Pyranometers and pyrheliometers need regular calibration or validation. This is necessary in oder to ensure the accuracy of the measurements and traceability to the applicable reference standard. Regular calibrations keep the uncertainties of your measurement low and allows comparison to other measurements taken at another place or earlier in time.
The mandatory reference standard for solar irradiance is the World Radiometric Reference (WRR) an artefact based standard hosted at the World Radiation Centre (WRC) in Davos.
Measurement and calibration procedures as well as instrument classifications for solar irradiance measurements are described in the WMO-CIMO Guide and within several standards of ISO. While the WMO-CIMO Guide is more focussed on meteorological measurements, the ISO standards focus more on solar energy applications.