21
Taking the Difference Measurement
1. Press and release the HOLD button, so that it pops out (into RUN
position).
2. Aim the receptor at the light source you want to measure.
◆ The display shows the measurement results (the differ-
ence results).
● You can change the display mode by pressing [∆] as nec-
essary. Each press cycles you to the next mode, as indi-
cated at left.
● You can review the target values at any time by holding
down the [CALL] key. The values remain on the screen
until you release the key.
● The CHROMA METER will continue to use the currently stored target values. If you wish to
change the target values, you must set new ones using the procedures described on
pages 16 to 20.
● If you wish to clear the stored target values, manually input 0’s into each target value field
(using the manual-input procedure described on pages 17 and 18). If target values are
cleared, the CHROMA METER will no longer display color differences.
● The CHROMA METER can measure and display difference values within the following
ranges.
∆Ev (lx): (0 –
target value
) to (99,990 –
target value
)
∆Ev (fcd): (0 –
target value
) to (9,999 –
target value
)
∆x, ∆y, ∆u’, ∆v’: -0.9999 to 0.9999
∆u’v’: 0 to 0.9999
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