Elevated Unidirectional Light Angle Calibrator (TBC: no features, no Chinese datasheet, no English datasheet)
An angle calibrator for elevated unidirectional fixtures, checking both the aiming angle of the beam and the level of the light; it is a field instrument for installation and maintenance crews. A light is set to its design angle against the gauge when it goes in and re-checked on routine rounds, so a deviation is measured at the light and corrected there rather than taken back to a workshop.
