Altana 345 000 016, Operating Manual

Page: 90 / 96

9 | Service and Maintenance BYK-Gardner GmbH
90 spectro2guide Pro 295 024 855 E 2106
9.5 Cleaning the Jetness Standards
The accuracy of the measurement can be significantly impacted by using dirty or
damaged standards. An LED flashlight is provided to check the cleanliness – see
“
Exclusive Parts for Pro Variant [
}
20] ”.
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 under-
taken 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.