Calrec SUMMA, Installation Manual

Page: 53 / 96

CALREC
Putting Sound in the Picture
53
WARNING
Never look into the end of an optical
transceiver or fibre when in use.
Laser radiation can be harmful to the
human eye and should be avoided.
Remember that when disconnecting
a fibre, the transmitting device at the
other end may still be active.
CleaningFibreOpticCablesand
Connectors
There are multiple ways to clean fibre-
optic cables and connectors. Included
below are some helpful tips:
• Do not allow the end of the fibre optic
cable to make contact with any surface.
• Do not excessively bend the fibre cable
as this may cause internal breaks along
the fibre resulting in poor performance
or instability.
• Optics and optic coatings are easily
chipped and/or scratched. Use of
finger cots or powder free surgical
gloves while handling fibre optic cables,
will help ensure cleanliness.
• Only fresh (dry) spectroscopic grade
Isopropyl Alcohol should be used as a
cleaning solvent.
• Ensure that the module power is
off and that other light sources are
disabled.
CleaningProcedure
1. Blow the fibre surface with a stream of
Clean Dry Air, this will dislodge larger
loose particles.
2. Place 1-3 drops of spectroscopic grade
Isopropyl Alcohol in the centre of a lens
tissue.
3. Hold the fibre by the connector or
cable, place the wet portion of the lens
tissue on the optical surface and slowly
drag it across.
4. Examine the surface of the fibre end
under high intensity light using a direct
magnifying inspection microscope
or an indirect video inspection tool if
available. If streaks or contaminants
still remain, repeat the process using a
fresh lens tissue.
5. Immediately install a protective cover
over the end of the cable to avoid re-
contamination or insert the fibre back
into the previously cleaned receptacle
for immediate use.
AdditionalNotes
• Do not tip the can of Clean Dry Air
whilst aerosol spraying as liquid may be
released contaminating the surface of
the fibre.
• Do not use dry lens paper as it is
extremely abrasive.
• Do not use Acetone as a cleaning
solvent on the fibre optical surfaces.
• To ensure the purity of the Isopropyl
Alcohol, do not insert the lens tissue,
swabs, etc into the liquid, instead, drip
the liquid on to the material.
CleaningOpticalTransceivers
The best way to clean a transceiver port
is to remove particles using a stream of
Clean Dry Air. Included below are some
helpful tips to properly clean fibre optic
modules:
• Always handle optical SFP modules in
an ESD safe manner using the proper
safety precautions.
• Ensure that the module is powered off
and handle the modules with care.
• Always use Clean Dry Air or an
approved canned compressed air
supply.
• Always hold the can of compressed air
upright. Tipping may release liquids
into the air stream.
• Do not touch the inner surfaces of the
module including the Optical Sub-
Assemblies (OSA), or insert any foreign
objects into the ports.
• Use of finger cots or powder free
surgical gloves are not required but
may be used for cleanliness.
CleaningProcedure
With the clean dry air, blow the inner
barrel of the Transmitter and Receiver
Optical Sub-Assemblies (OSA). This will
dislodge loose particles.
Examine the surface of the OSA lens
under high intensity light using an
inspection microscope. If contaminants
still remain, repeat the process.
Following these guidelines should
provide a successful installation and
ensure optimum reliability and system
performance.
For further information or advice please
feel free to contact Calrec.