Keysight Technologies 81490A User Manual page 60

Cleaning Information What do I need for proper cleaning?
If you use isopropyl alcohol to clean your optical device, do
not immediately dry the surface with compressed air (except
when you are cleaning very sensitive optical devices). This is
because the dust and the dirt is solved and will leave behind
filmy deposits after the alcohol is evaporated. You should
therefore first remove the alcohol and the dust with a soft
tissue, and then use compressed air to blow away any
remaining filaments.
If possible avoid using denatured alcohol containing
additives. Instead, apply alcohol used for medical purposes.
Never drink this alcohol, as it may seriously damage to your
health.
Do not use any other solvents, as some may damage plastic
materials and claddings. Acetone, for example, will dissolve
the epoxy used with fiber optic connectors. To avoid damage,
only use isopropyl alcohol.
Cotton swabs
We recommend that you use swabs such as Q-tips or other
cotton swabs normally available from local distributors of
medical and hygiene products (for example, a supermarket or
a chemist's shop). You may be able to obtain various sizes of
swab. If this is the case, select the smallest size for your
smallest devices.
Ensure that you use natural cotton swabs. Foam swabs will
often leave behind filmy deposits after cleaning.
Use care when cleaning, and avoid pressing too hard onto
your optical device with the swab. Too much pressure may
scratch the surface, and could cause your device to become
misaligned. It is advisable to rub gently over the surface
using only a small circular movement.
Swabs should be used straight out of the packet, and never
used twice. This is because dust and dirt in the atmosphere,
or from a first cleaning, may collect on your swab and
scratch the surface of your optical device.
Soft tissues
These are available from most stores and distributors of
medical and hygiene products such as supermarkets or
chemists' shops.
Keysight 81490A Reference Transmitter Module User's Guide, Edition 3.0
59