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Sensitivity Adjustment
1) Turn the SENS trimmer anti-clockwise in the minimum sensitivity position and carry out a
test by walking in the central point of the covered zone (point with lower system sensitivity)
and check the behaviour of the green LED.
2) If required, progressively increase sensitivity until the wanted reply degree is obtained.
3) 3) After each sensitivity adjustment, wait for approx. 20 seconds for all signals to be set and,
therefore, carry out a new test.
Attention: an excessive sensitivity can cause unwanted alarms in critical conditions (intense rain,
snow, etc.).
4) 4) A special compensation circuit has been included in the BMHP system, adjustable by
means of the COMP trimmer (turning it clockwise increases compensation); this circuit
records the disturbances produced within the microwave field when the target is nearing or
moving away, transversally at lobe, and automatically increases the sensitivity of the Receiver
to facilitate detection when the target crosses the central line of the lobe. The compensation
circuit can be completely excluded using DIP6=OFF of SW1. An excessive compensation
can cause an unwanted alarm of the barrier when objects move near the lobe.
If wanting the complete management of the adjustments, using the software (mod.
HPSOFT), the trimmers "SENS" and "COMP" and DIP6=ON must be set halfway
CAUTION
(BM120HP and BM200HP ONLY)
Due to larger pattern and to compensation circuit,
BM HP
beams are more sensitive to
perturbations caused by moving objects in the areas near the corridor protected.
Consequently, the security distance to be kept in the installation, especially in respect to
the transit of vehicles, trains, or presence of big trees or bushes, must be increased. In the
special case of a street with vehicles transit, parallel to the protected area, it is suggested
to keep a minimum security distance of
10 meters
.
Signal
Signal
Alarm
thresold
ALARM
Extreme Compensation
ALARM
Correct Compensation
Alarm
thresold
E
N
G
