Omega Vehicle Security HHLM-2 - Manual (Page 7)

5
OPERATION
1. Set the function switch to the desired lux or fc units.
2. Remove the sensor head cover.
3. Hold the sensor head steady and make certain that the light source completely
fills the cosine correction dome.
4. Move away from the sensor head to avoid shadowing it. The sensor head has
a 1.5 meter cable to allow separation between the observer and the measure-
ment location.
5. Read the illuminance value from the display. If magnitude of lux (or fc) is not
known, press RANGE button to the highest range and reduce until a satisfac-
tory reading is obtained.
6. Cover sensor head to extend sensor life.