ALTANA Haze-Gard Dual User Manual
Page 24
23
English
6.7
Cleaning
The standard surfaces are very
sensitive. Hence, standards should
be cleaned as seldom as possible.
Dust and lint can cause incorrect
measurements. Thus, standards
must be cleaned with oil-free com-
pressed air before use.
Never rub the standard dry!
The rubbing action may cause
scratches from surface dust.
Extreme care must be taken when
cleaning standards. Use a fresh soft
cloth and wash the standards in dis-
tilled water. Do not apply pressure
or rubbing action. Ensure that there
are no particles adhering to the
cloth that might damage the stan-
dard surface.
Do not use aggressive cleaners
such as solvents, rubbing alcohol,
trichloroethylene, benzene, strong
alcohols, acids or lyes. Chemical
cleaners and polishes are equally
damaging.
To remove stubborn dirt, add a little
household dish detergent (acid-free)
to the water. Rinse in distilled water.
Dry with oil-free compressed air and
blow off any remaining dust or lint.
Do not rub the standard dry! The
rubbing action may cause scratches
from surface dust.
6.8
The Validity of Standard
Values
Even if handled carefully, the mea-
surement values of the standards
can change due to environmental
factors. Thus, primary standards
should be measured regularly by
the Byk-Gardner Service.
A monitoring interval of one year is
recommended in this case.
6 Calibration