IntroductionAbout this manualThis manual,describes the SPN1 Sunshine Pyranometer and how to useit. See also the SPN1 Quick Start Guide.Appendix 1 describes the SPN1 design and includes a summary of thetest results of several experimental trials of the SPN1.The Delta-T Software and Manuals CD contains document files in Acrobatpdf format, and software. It includes this manual, the SPN1 Quick StartGuide, and other files relating to the SPN1. The CD also contains theSunRead software.Description and functionsWhat it measures• The SPN1 Sunshine Pyranometer is one sensor with three outputchannels:-1. Total (global) solar radiation2. Diffuse radiation3. Sunshine status.• The SPN1 measures short wave radiation between 400nm and2700nm in W.m-2.• The Direct beam component of solar radiation can be calculated fromthe Total minus the Diffuse component.• The Sunshine status output indicates whether the energy in the directbeam exceeds the WMO standard threshold value of 120 W.m-2,using an algorithm based on the Total radiation, and the ratio of Totalto Diffuse radiation.• The radiation outputs have a cosine-corrected response.What it is used for• Meteorological Global, Direct and Diffuse solar radiation and sunshineduration measurements.• Solar energy monitoring, and solar collector studies.4 z Introduction SPN1 User Manual v1.0