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E-115
Principles of Measurement
Illumination Area and Measurement Area
The CM-2600d allows selection of either SAV (ø3 mm) or MAV (ø8 mm) measurement area according
to the specimen and applications. A Target Mask (illumination area) suitable for the selected measure
-
ment area must be installed.
Note
With the CM-2500d, only MAV (ø8 mm) is available.
Target Mask
Since this instrument does not have automatic Target Mask matched to the selected measurement area
must be attached correctly.
Since the condition of the inner surface of the Target Masks affects measured values, do not touch the
inner surface by hand, scratch it or allow it to get dirty.
Note
With the CM-2500d, it is not possible to exchange a Target Mask since only MAV (ø8 mm) is available.
Measurement Area
The measurement area can be switched between SAV and MAV by sliding the measurement area selec-
tor provided on the side of the instrument.
Note
With the CM-2500d, no measurement area selector is provided.