7
6.
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 Power/function/range Switch to select the “lux” scale
and set the range to desired (“lux” or “x10 lux”) range.
2.
Remove the meter and face the photo detector to light source in
a horizontal position.
3.
Read the illuminance nominal from the LCD display.
4.
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.
5.
When the measurement is completed. Replace the photo
detector from the light source.
6.
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 (
) as the following chart
described.
100% (Relative Sensitivity) Spectral Sensitivity
V(
)
