Spectral Response Curve V(Λ); Variation According To The Type Of Light Source; Memory - AEMC 1110 User Manual

5.2.3. Spectral Response Curve V(
Visible light is electromagnetic radiation with wavelengths between 380nm and 780nm. The response curve of the
eye as a function of wavelength has been determined by the IEC (International Electrotechnical Commission). This
is the V(λ) curve, or relative spectral luminous efficiency curve for photopic vision (daytime vision).
Relative luminous efficiency:
The error on the spectral response of the sensor is equal to the area of the differences between the V(λ) curve and
the curve of the sensor.

5.2.4. Variation According to the Type of Light Source

The Model 1110 provides three measurement compensations:

Incandescent (default)

LED

FLUO (fluorescent)
LED compensation is for measurements on LEDs at 4000K. The intrinsic uncertainty in this case is 4%. If this
compensation is used for other LEDs, the intrinsic error is increased as indicated in the following table.
FLUO compensation is for measurements on type F11 fluorescent sources. The intrinsic uncertainty in this case is
4%. If this compensation is used for other fluorescent sources, the intrinsic error is increased as indicated below.
Quantities of
influence
Type of light source
See Appendix §A.1 for light source spectral distribution graphs.

5.3. Memory

The instrument has 8MB of flash memory, sufficient to record and store a million measurements. Each record
contains the measurement value, date and time, and unit of measure.
17
λ
)
Range of influence
LED 3000 to 6000K
Fluorescents of types
F1 to F12
Quantity
influenced
Illumination Intrinsic uncertainty is increased by 3%
Intrinsic uncertainty is increased by 6%
Lightmeter Data Logger Model 1110
Influence
(for a total of 6%)
(for a total of 9%)