Essilor ALM 700, Maintenance Manual

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7.3. Example of measurement image
Normal
The measurement image as shown on the left is
displayed if the device is normal and the
measurement is taken correctly.
Abnormal
In case that the unnecessary light is entered,
 Background is uneven

Measurement values varies
‘Measurement Error’ is displayed.
In case that the lens to be measured is dirty or
scratched or the lens under the lens holder is dirty.
If something blocks a part of the light path,
 Measurement ring lacks
 Measurement value is unstable
 Measurement ring lacks widely (more than
75%) and “Measurement Error” is displayed.
In case that something blocks the light path or
failure of the electric control system such as the
measurement light board Assy. or CMOS camera
board camera etc.

Measurement image lacks
(Nothing is displayed on the black or white screen.)