Apple IMac - Page 248

Adjustments Light Meter Setup - 3
To measure a display
screen’s luminance,
1 Set the scale switch to
the bottom position (to
set up the 10-50 fc
scale).
2 Place the lens against
the middle of the screen
and read the bottom
scale.
Note:
When the light meter
is not in use, slide the scale
switch to its top position,
and store the meter in its
protective case.