This is one o of the first international intercomparison of secondary stan- dard radiometers held in Latin America. It took place between 3 and 7 of September 2018 in the outdoor facilities of the Laboratory of Photometry and Radiometry of the Physics Department of the Universidad de Santiago de Chile at Santiago. The activity was hosted by Dr. Raul Cordero and his collaborators and sponsored by PTB (Germany), represented by Ms. Imilce Zuta. Both global irradiance and direct irradiance measuring instruments where compared. The reference instruments for global irradiance measure- ments where provided by the World Radiation Center (WRC/PMOD) from Switzerland, represented by Dr. Wolgang Finisterle. The reference instru- ment for direct irradiance was a new absolute pirheliometer of the Labo- ratory of Photometry and Radiometery recently calibrated at PMOD with trazability to the World Radiation Reference (WRR).