Insulation Rings
All Smart instruments contain sensitive electronics that are affected by transient over-voltage surges, as can be present on solar energy parks. The large metal array frames, and often imperfect earthing, create receivers for all sorts of electrical discharges. In order to ensure that the radiometer is electrically insulated from the mounting structure it is advised that an insulation ring is fitted under the instrument. This ring also offers thermal insulation from the mounting when tilted pyranometers are installed with the feet removed.