Technical data

Which Cleaning Procedure should I use ? 5
Cleaning Procedures 41
Procedure J
How to clean metal filters or attenuating mesh
filters
This kind of device is extremely fragile. A misalignment of the
filter leads to inaccurate measurements. Never touch the sur-
face of the metal filter or attenuating mesh filter.
Be very careful when using or cleaning these devices. Do not
use cotton swabs or soft tissues, as there is the danger that
you cannot remove the lint and that the device will be
destroyed by becoming mechanically distorted.
Preferred Procedure
Use the following procedure on most occasions.
1 Use compressed air at a distance and with low pressure to
remove any dust or lint.
Procedure for Stubborn Dirt
Do not use an ultrasonic bath as this can damage your device.
Use this procedure when there is greasy dirt on the device.
1 Put the optical device into a bath of isopropyl alcohol, and
wait at least 10 minutes.
2 Remove the fluid using compressed air at some distance
and with low pressure. If there are any streaks or drying
stains on the surface, repeat the whole cleaning procedure.
cleaning.book Page 41 Wednesday, May 22, 2002 5:16 PM