Regan Scientific Instruments BOT-3000E, Руководство по эксплуатации

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Figure 8
NOTE: If a third party reference surface was provided for use
with a specific standard test method, then the procedure from
the provider should be followed.

Whenever squared edge type surfaces (e.g. mosaic tiles),
are to be tested, a best practice is to orient the device to
traverse the edges at or near 45 degrees. This will make the
transition between tiles smoother.

The supplied reference surface can eventually become worn
or soiled with sensor material, minute particles, dried SLS, or
fingerprints. It is advisable to clean it occasionally with
Bona™ Stone, Tile and Laminate floor cleaner, which is
available from many retail stores. Dry the surface with plain
white paper towels ONLY, as some paper towel products are
treated with lint reduction agents, and could affect the
measurement results of the surface. The reference surface
should be polished periodically with 12 micron lapping film to
remove invisible contamination buildup.