Keysight Technologies N4373D User Manual page 113

Maintenance
We recommend that you do not use normal cotton tissues, but
multi-layered soft tissues made from non-recycled cellulose.
Cellulose tissues are very absorbent and softer. Consequently,
they will not scratch the surface of your device over time.
Use care when cleaning, and avoid pressing on your optical
device with the tissue. Pressing too hard may lead to scratches
on the surface or misalignment of your device.
Just rub gently over the surface using a small circular
movement.
Use only clean, fresh soft tissues and never apply them twice.
Any dust and dirt from the air which collects on your tissue, or
which has gathered after initial cleaning, may scratch and
pollute your optical device.
Pipe cleaner Pipe cleaners can be purchased from tobacconists,
and come in various shapes and sizes.The most suitable one to
select for cleaning purposes has soft bristles, which will not
produces scratches.
The best way to use a pipe cleaner is to push it in and out of the
device opening (for example, when cleaning an interface). While
you are cleaning, you should slowly rotate the pipe cleaner.
Only use pipe cleaners on connector interfaces or on
feedthrough adapters. Do not use them on optical head
adapters, as the center of a pipe cleaner is hard metal and can
damage the bottom of the adapter.
Your pipe cleaner should be new when you use it. If it has
collected any dust or dirt, this can scratch or contaminate your
device.
The tip and center of the pipe cleaner are made of metal. Avoid
accidentally pressing these metal parts against the inside of the
device, as this can cause scratches.
Compressed air Compressed air can be purchased from any
laboratory supplier.
It is essential that your compressed air is free of dust, water and
oil. Only use clean, dry air. If not, this can lead to filmy deposits
or scratches on the surface of your connector. This will reduce
the performance of your transmission system.
Keysight N4373D Lightwave Component Analyzer, User's Guide
111