38
5.2 SIGNALS
Display
Sounder
Luminous bar
READY
----
off OFF
Transit
with NO
ALARM
*
**
***
****
off OFF
Transit
with
ALARM
*
**
***
****
ON
Large
metal
mass
****
ON
pulsed
Blinking
Random
Alarm
QUOT
ON OFF
Other Alarm indications. Metal Type Indication:
Ferr
:
ferrous metal;
NoFe
:
non-ferrous metal
.
NOTE: signals may be different according to the equipment
setting.
5.3 OPERATION
5.3.3 Transit management
STOP
1
3
4
5
6
7
2
1: Line of people waiting to be inspected
2: Waiting line
3: Entry pacing lights
4: Metal Detector archway
5: Metal Detector control unit
6: Screener
7: Luggage recovery area
Installation with an X-ray unit
As part of the normal screening process,
people are required to perform a complete
passage through the archway.
Instruct the people to deposit their
hand-luggage,
bags, coats, cellular phones, cameras,
calculators
and
spectacle cases
on the X-ray
conveyor belt or in special containers, maintaining
a distance of at least one meter from the Walk-
Through Metal Detector archway.
Allow only one person at a time to walk
through the unit.
During a transit the
red
entry
pacing light indicates to people standing in front of
the archway they must wait until it becomes free
again.
If the alarm of the Walk-Through Metal Detector
is not activated, no further search is required.
On the contrary,
an alarm state
upon a person’s
transit
, which is the result of metal objects carried
by that person that are above the alarm threshold,
requires further action in order to clear the
cause(s) of the alarm. This secondary screening,
which may also make use of other different devices
such as Shoe Analyzers, Hand Held Metal
Detectors or other WTMD, shall be performed
according to local Security Authority procedures
taking into account that:
The indication given through light bars that
illuminate where the presence of an object is
detected is solely meant to help screeners
establish the cause of an alarm and not as
determiner of the number of objects in transit.
For example, the removal of an object
pinpointed by a light at waist level cannot
exclude the presence of another object placed
nearby.
In fact, the presence of multiple objects above
the threshold limit which are carried by any
person can only be excluded through a final
transit to be performed through
the WTMD without alarm condition
or trough appropriate secondary
search procedures.
NOTE When the equipment is not used for
a prolonged period, switch it off and
protect it with the accessory cover
code 64395 (Elliptic model only).
5.3.4 Sources of interference
The Walk-Through Metal Detector creates a
magnetic field which extends inside and around the
archway. Because of this, the unit is sensitive not
only to metal masses carried by people in transit,
but also to masses of metal which may be located
in close proximity and are subject to movements.
During operation, make sure that:
o
Large movable metal objects such as baggage
carts or wheelchairs are kept one meter (three
feet) away from the archway.
o
Other large metal structure such as control
barriers that are meant to be stable during
operation, do not provoke alarm signals.
o
Do not allow waiting people to come closer than
one meter (three feet) from the entrance of the
unit.
Ensure that only one person enters the unit at a
time.
Do not allow the Walk-Through Metal Detector to
be used as an unattended public walk-through
access.
Instruct the people to walk through the center of
the archway so that they do not bump into the
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