BYK haze-gard plus Mode D'emploi page 20

5.1 Additional Standards for
Monitoring Test Equipment
To check proper operation of the in-
strument, measurements with special
test standards should be performed
at regular intervals (about once every
three months). The appropriate test
standards are listed in the Ordering
Guide.
The displayed readings should fall
within the specified values for the
standard. If they do not, check that
the standard was clean and that the
device was properly calibrated. If
cleaning the standard and recalibra-
tion do not correct the error, please
contact Customer Service.
All manuals and user guides at all-guides.com
5.2 Cleaning the Standards
Calibration with a dirty or damaged
standard may severely affect the
accuracy of measurements.
Standard surfaces are very delicate.
Be very careful when cleaning them.
Use a fresh, soft cloth, and wash
the standards in running or standing
cold water. Do not apply a
scrubbing action or heavy pressure.
Make sure no large particles that
might damage the surface adhere to
the cloth.
Do not use aggressive cleaners
like solvents, rubbing alcohol,
trichloroethylene, benzine, or strong
alcohols, acids or lyes. Most chemical
cleaners or polishes will cause
damage.
To remove stubborn dirt, add a little
household dish detergent to the
water. Rinse with distilled water.
Dry with compressed air and blow
off any dust or lint.
Never rub the standard dry!
The rubbing action may cause
scratches from surface dust.
Precise calibration is possible only
with flawless standards. If visual
appearance or measurement errors
suggest that a standard is compro-
mised, we'll be glad to check it.