Introduction
Beware of ESD!
When you handle electronic circuit boards, you must beware of
the dangers of electrostatic discharge (ESD), both to yourself and
to the equipment. In order to ensure safe transport and storage,
circuit boards and other electronic units will always be wrapped
in a clear plastic protective bag, and the bag will be sealed.
See also:
What is ESD?
on page 24.
Unpacking and handling circuit boards
To unpack a circuit board:
• Wherever possible, prepare a suitable workbench. It must
have an approved conductive service mat, and it must be
connected directly to a reliable earth point via its earthing
cord. You must wear a wristband in direct contact with the
skin, and the wristband must be connected to the service mat.
• Lift the circuit board, in its protective bag, out of the carton
and place it in a stable position on the a
fl
oor/work bench.
• Inspect the unit for damage before you open the plastic bag.
• Do not break the seal to open a circuit board package before
the board shall to be used. If the board package is returned
with the seal broken, we will assume that the content has been
used, and we will bill you accordingly.
• Assuming all is well, open the bag and remove the unit.
• Take out and keep the documentation. You will need it if
the circuit board shall be returned to us. Also, remove any
packing and desiccant material that may be inside.
• Keep the protective plastic bag for future use.
Unpacking on board
When you are working on board a vessel, an “approved
conductive service mat” is often far away. As you still need to
unpack circuit boards, make sure that you do it in the instrument
room, or at another location where you have a steel deck. Keep
far away from the bridge or any other rooms with wall-to-wall
carpets! If possible, bring a wristband and ground yourself.
Returning a circuit board
If you wish to return a circuit board to us, observe the following
rules.
• Place the circuit board to be returned in the same protective
plastic bag as you originally received it in - or a protective bag
of similar ESD protection quality.
• DO NOT use standard plastic bags, such as commercial
bubble wrap.
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