4. Anti-Masking and Anti-Blocking Functionality
Anitmasking
The XD10TTAM is able to detect when one or both PIR detectors as well as the
Microwave module are masked. For this purpose it uses the patented anti-masking
technology where the anti-masking detection is done via the MW technology. The AM
technology is able to detect masking of the detector with aluminium foil, spray and any
object position on or in front of the detector with the purpose of obstructing the field
of view of the PIR or MW sensors.
As soon as an object enters the masking area of protection (this is adjustable between
0 to 1m) the detector initialises the mask processor. The Blue LED starts flashing to
show this process has been initiated. The mask processing continues for total of 1
minute and is divided into 2 groups of 30 sec intervals. If during the second 30 sec
interval the obstruction is removed and all 3 technologies are activated the detector
will be reset to normal working condition and the masking processing will be stopped.
If the obstruction is not removed then at the end of the 1 minute timer the MASK and
ALARM relay will open and the Green and Orange LEDs will be permanently activated.
The anti-masking feature is very effective to identify any obstruction of the PIR or MW
sensors by any object as well as detecting masking the PIR detectors by spray.
Blocking
The blocking feature allows the detection of obstruction of the XD located further than
is moving behind the car the MW sensor will be activated but the PIR sensors will not
be activated. This will activate the Blocking feature of XD. To reset the blocking XD
should be walk tested so that both PIRs and MW sensors are activated.
the max of 1m the AM feature can detect. The blocking feature
is very useful when there is the risk for an intruder to access the
perimeter behind obstructions such as parked cars, pallets or
any other tall enough object located within the filed of view of
the detector. When the blocking feature is active the Alarm relay
will open and the Green and Orange LEDs will be activated.
For example, if a car is parked in front of the XD and therefore
obstructing the field of view of the PIR sensors and if some one
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XD10TTAM