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マルチメーター Major tech MT1875のPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。Major tech MT1875 16 ページ。 6-in-1 environmental multimeter
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6.3. Measuring Light
•
Set the function switch to the "Lux" scale and set the range to
desired ("Lux" or "x10 Lux") range.
•
Move the meter to face the photo detector to a light source in a
horizontal position.
•
Read the illuminance nominal from the LCD display.
•
Over-range: If the instrument only display one "1" in the M.S.D. the
input signal is too strong, and a higher range should be selected.
•
When the measurement is completed. Remove the photo detector
from the light source.
•
Spectral sensitivity characteristic: To the detector, the applied photo
diode with filters makes the spectral sensitivity characteristic almost
meet C.I.E. (International Commission on Illumination) photopia
curve V (λ) as the following chart described.
100% (Relative Sensitivity)
80%
60%
40%
20%
0
400
Wave length (nm)
Recommended Illumination:
Locations
•
Office
Conference, Reception room
Clerical work
Typing drafting
•
Factory
Packing work, Entrance passage
Visual work at production line
Inspection work
Electronic parts assembly line
•
Hotel
Public room, Cloakroom
Reception, Cashier
10
Spectral Sensitivity
500
600
700
Lux
200 to 750
700 to 1,500
1000 to 2,000
150 to 300
300 to 750
750 to 1,500
1500 to 3,000
100 to 200
200 to 1,000
V(λ)