RS Pro RS-3809 Manuel D'instructions page 5

LED Light Meter / English
• 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.
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• 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
25/12/2017 Version No. 001 25/12/2017 Version No. 001
Illuminance (lux) Place
Where such work as assembling, inspecting testing, selecting,
3000 to 1500
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
Illuminance (lux) Place
1500 to 300 Precision drawing or drafting, precision experimenting, library
750 to 200 Classrooms, library reading rooms, Staff room, Gymnasia
Lecture halls, assembly room corridors, locker rooms, stairways,
300 to 75
restrooms
75 to 30 Warehouses and emergency stairways
10 to 2 School passages
LED Light Meter / English
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