Illuminance is measured by positioning the illuminometer using visual observation so that it is at the center of the lighting range (short range and long range). The illuminance setting for the light source will be set at 30,000 Lx using the reference measurement (measurement acquired using a standard light guide and measuring jig). If the light source illuminance set at 30,000 Lx using the reference measurement exceeds 99,900 Lx (measuring instrument's upper limit), reduce the light quantity to a measurable range; then convert to 30,000 Lx afterwards.
