6
7
• Relative Spectral (Sensitivity)
The deviation from the comparative standards for luminosity is determined by JIS
standard C 1609-1993.
Peak sensitivity wavelength : 550 nm
• Corrected LED day white light Spectrum
9. Attention
• Set for referring the testing of source of light is located at the right top end (0 degree)
of the light sensor ball plane.
Light Source o degree
• When the meter is not in use. please keep the cap of the light sensor in its place to
avoid the photo diode from wearing out.
LED Light Meter / English
LED Light Meter / English
25/12/2017 Version No. 001
25/12/2017 Version No. 001
• When it is not in use for a long time, please take the batteries.
• Away avoid keeping it in a place of high temperature and humidity.
10. Recommended Levels of Illumination
Suitable levels of illuminace
( According to the JIS standard Z 9110-1979)
Offices, Factories
Illuminance (lux)
Place
1500 to 300
Precision drawing or drafting, precision experimenting, library
750 to 200
Classrooms, library reading rooms, Staff room, Gymnasia
300 to 75
Lecture halls, assembly room corridors, locker rooms, stairways,
restrooms
75 to 30
Warehouses and emergency stairways
10 to 2
School passages
Illuminance (lux)
Place
3000 to 1500
Where such work as assembling, inspecting testing, selecting,
extremely precision Visual work
1500 to 750
Assembling, inspecting, testing,selecting, precision visual work
750 to 300
Assembling, inspecting, testing, selecting and visual ordinary work
300 to 150
Wrapping and packing
75 to 30
Indoor emergency stairways
Schools
