BYK-Gardner GmbH Service and Maintenance | 9
295 024 855 E 2405 spectro2guide Family 83
9.5 Cleaning the Jetness Standards
The accuracy of the measurement can be significantly impacted by using dirty or damaged stan-
dards. An LED flashlight is provided to check the cleanliness – see “Exclusive Parts for Pro Vari-
ant [}17]”.
Use the LED flashlight on black samples and on the jetness standards:
• An angle of 0° ... 15° is good to detect dust on the surface.
• An angle of 75° ... 90° is good to detect streaks on the surface.
Since the surfaces of the standards are highly sensitive, cleaning must be undertaken with great
care. Make sure to observe the following rules.
WARNING: Do not use any acetone!
• To clean standards, use a new lint-free cloth, dust-free lens paper or an optical cloth.
• Apply only slight pressure as you clean and make certain there are no large particles stuck in
the cloth that could damage the surface.
• For dirt that is difficult to remove, use an optical cloth dipped in propanol. Then wipe the
surface with a dry optical cloth.
• It is highly recommended to handle the standards with great care. They should always be
stored enclosed.
• Exact calibration is not possible unless the standard is in perfect condition. If the condition
of the standard seems doubtful because of its appearance or measurement errors, we will
be happy to check it for you.
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