| Room
Access Control |
It is essential that
the access door leading into the machine room
from the operators’ room is controlled and
monitored.
Various options are available which range from
a simple mechanical digital lock, through card
readers, electronic tokens, fingerprint and iris
readers, to a live video screening for personal
vetting by a security guard.
These are connected to a means of locking/unlocking
the door, which may be an electronic retractable
lock keep, or a magnetic lock – which is
a large electro magnet. Consideration has to
be taken of the frequency of visits required
into the machine room by operators, to decide
the most convenient method of access vetting.
The most frequent requirement is best dealt
with by electronic tokens.
It is important that the locks have either a
manual means of release from inside the room,
to enable occupants to escape in an emergency.
They may be arranged to fail safe, which means
that they release when the electrical power
to them is switched off – usually when
a manual break glass fire alarm is activated.
However such an arrangement needs careful consideration
– see Pitfalls
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