http://www.iso.org ISO standards and projects ISO - International Organization for Standardization 240 http://www.iso.org/iso/logo_iso.gif http://www.iso.org ISO 9847:1992 - Solar energy -- Calibration of field pyranometers by comparison to a reference pyranometer This document reached stage 90.60 on 2012-12-19 , TC/SC: ISO/TC 180/SC 1, ICS: 27.160 Published standards ISO 9846:1993 - Solar energy -- Calibration of a pyranometer using a pyrheliometer This document reached stage 90.60 on 2008-12-17 , TC/SC: ISO/TC 180/SC 1, ICS: 27.160 Published standards ISO 9059:1990 - Solar energy -- Calibration of field pyrheliometers by comparison to a reference pyrheliometer This document reached stage 90.60 on 2008-12-17 , TC/SC: ISO/TC 180/SC 1, ICS: 27.160 Published standards ISO 9060:1990 - Solar energy -- Specification and classification of instruments for measuring hemispherical solar and direct solar radiation This document reached stage 90.92 on 2008-11-01 , TC/SC: ISO/TC 180/SC 1, ICS: 27.160 Published standards ISO 9845-1:1992 - Solar energy -- Reference solar spectral irradiance at the ground at different receiving conditions -- Part 1: Direct normal and hemispherical solar irradiance for air mass 1,5 This document reached stage 90.92 on 2008-11-01 , TC/SC: ISO/TC 180/SC 1, ICS: 27.160 Published standards ISO/TR 9901:1990 - Solar energy -- Field pyranometers -- Recommended practice for use This document reached stage 60.60 on 1990-08-23 , TC/SC: ISO/TC 180/SC 1, ICS: 27.160 Published standards