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When measuring under a light source which has a considerably different spectral distribution from
T-10A/T-10MA’s calibration light source, the instrument will cause an indication error due to a slight
deviation of the relative spectral response from spectral luminous efficiency (Vλ). To correct this error,
this instrument has CCF function (mode), allowing you to set the color correction factor (CCF).
In addition to the purpose of color correction, the CCF function can also be
used for correction of indication errors between multiple T-10/T-10A illuminance
meters and for user calibration under an accurately set light source.
Measurement using the CCF
1
Push out the hold button (RUN).
Measurement will start.
2
Open the slide cover and press the [CCF] key.
z
In CCF mode, the following value is displayed.
Displayed value = Measured value x Color correction factor (CCF)
Pressing the [CCF] key will cancel correction, and the measured value which has not been corrected
will be displayed.
Example) When CCF = 0.900:
▲Normal mode ▲CCF mode
z
Once the CCF is set, it will remain effective until it is changed.
Color Correction Factor (CCF)
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