koban KMA 41MF Mode D'emploi page 20

KMA 41MF
Multi-Function Environment Meter
4. The A, C-weighting curve is nearly uniform over the frequency
range form 30 to 10 KHz, thus giving an indication of overall Sound
level.
5. The Fast response is suitable to measure shout bursts and peak
values form sound source.
6. The sound level will be displayed.
7. Note: Strong wind (over 10m/sec.) striking the microphone can
cause misreading for measurement in windy locations, a windscreen
should be used in front of microphone.
Measuring Light
1. Turn the function Switch to select the "Lux"
2. Remove the detector and face the photo detector to light source in a
horizontal position.
3. Press Select Button: Selects 20, 200, 2000, 20,000 LUX ranges.
4. Read the illuminance nominal from the LCD display.
5. 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.
6. When the measurement is completed. Replace the photo detector
from the light source.
7. 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.
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100%(Relative Sensitivity
80%
60%
40%
20%
0
400 500
Wavelength (nm)
8. 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
*Store
Indoors Stairs Corridor
Show window, Packing table
Spectral Sensitivity
V(λ)
600 700
Lux
200 ~ 750
700 ~ 1,500
1000 ~ 2,000
150 ~ 300
300 ~ 750
750 ~ 1,500
1500 ~ 3,000
100 ~ 200
200 ~ 1,000
150 ~ 200
750 ~ 1,500
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