Kipp & Zonen pyranometer calibrations WH AT \ˈka-lə-ˌbrāt\ Exposure to sunlight can cause slight changes to the sensitivity of a pyranometer over time. Regular recalibration is needed for accurate measurements. To correlate the readings of an instrument with those of a standard in order to check the instrument’s accuracy. Kipp & Zonen recommends recalibration every 2 years after first use. International Standard IEC 61724-1 Photovoltaic System Performance Monitoring: HOW The Kipp & Zonen Device and Procedure forms Annex A.3.1 of the ISO 9847 calibration standard. Class A (High accuracy): recalibration once per year Class B (Medium accuracy): recalibration once every two years It uses an artificial light source to compare the sensitivity of the test pyranometer with a reference pyranometer calibrated under sunlight. Class C (Basic accuracy): as per manufacturer’s requirements Pyranometers calibrated on any Kipp & Zonen automated facility can be fully checked for historic reliability, stability and uncertainty through the factory calibration database. Certificates and instrument labels can be easily reprinted if necessary. Kipp & Zonen remotely manages and monitors its automated calibration facilities around the world. Software controls the calibration process, avoids operator mistakes and saves all the results in a central database. Only after a successful calibration a certificate and instrument label can be printed. Kipp & Zonen partners receive the Approved Calibration Facility stamp only after the installation and commissioning meets Kipp & Zonen quality standards and calibration staff are fully trained. All pyranometers are inspected, tested and calibrated to the same procedures and quality as at the factory in Delft, The

Kipp & Zonen reference instruments are fully traceable to SI through the World Radiometric Reference at the World Radiation Centre SMP Smart pyranometers can be used immediately after recalibration, since the analog and digital outputs are converted to the new sensitivity stored inside. CMP pyranometers have a new sensitivity value (μV/W/m2) that must be used in the calculation from output (μV) to irradiance (W/m2), typically in a data logger. WHER E Kipp & Zonen is installing factory-standard automated calibration facilities in all the important regions of the world. United States China India...