ALTANA Wave-Scan II - Manual (Page 49)

48
English
Reference tile.
To ensure a precise instrument test,
only original test tiles from the
manufacturer should be used. Their
surface must not be touched and must
be protected against scratches. Due
to environmental influences, however,
the values of test tiles can change over
the course of time even if they are
handled gently. For this reason, have
the test tiles checked by the
manufacturer at regular intervals
(annual checks are recommended).
14 Testing the instrument
Cleaning the test tile
Since the surface of the test tile is
highly sensitive, cleaning must be
undertaken with great care.
To clean standards, use a new lint-free
cloth, dust-free lens paper or an
optical cloth as included with the
device.
Apply only slight pressure when
cleaning, and ensure the cloth is free
of dust or other particles that could
damage the surface.
For dirt that is difficult to remove, use
a pre-moistened optical cloth. Then
wipe the surface with a dry optical
cloth.
An exact verification is not possible
unless the test tile is in perfect
condition. If the condition of the test
tile seems doubtful because of its
appearance or measurement errors,
have it checked by the manufacturer.
The values printed on the reference
tile are the corrected readings. If the
values measured on the reference tile
are within the printed tolerance range,
the requirements are met.
If the mean value is not within the
desired tolerance range, try carefully
cleaning the test tile. If this produces
no improvement, please contact our
Customer Service department.