Adjusting The Shock Sensor - Vision 1480 Series Owner's Manual

ADJUSTING THE SHOCK SENSOR

Sensitivity
The shock sensor is factory preset to work well with
most vehicles out-of-the-box (50% setting). Howev-
if the siren doesn't go off when you think it should,
it's time to adjust the sensitivity.
Turn the sensitivity adjustment knob clockwise to increase sensitivity and
counter-clockwise to decrease
level, consider remounting the shock sensor.
False Alarms
The VISION 318-052 Active-IR shock sensor has been engineered to avoid
false triggers in most situations. However, there is still the possibility
the sensor could trigger the siren during a strong earthquake, jackham-
mer operation adjacent to the vehicle, hurricane/typhoon, large explosions/
extreme cases are anticipated, you can avoid false siren triggers simply
by Arming the system with the Sensor Bypass Arming, which ignores the
shock sensor (see page 3 of the Owner's Guide).
Another consideration is temperature. The sensitivity can vary by as much
as 20% under extreme temperature conditions. You may wish to reduce the
sensitivity in very hot weather and increase sensitivity in very cold weather.
Suspended Reflector Malfunction
If the shock sensor is not working well or at all, it may be that the suspend-
ed element inside the case was jolted out of position. Disconnect the wire
harness, snap open the shock sensor case, and adjust as shown below.
Correct Alignment
R5
R8
R3
R2
R4
504
17
Incorrect Alignment
R5
R8
R3
R2
R4
504
Full Trigger
RED LED
Sensitivity
Adjustment
Warning Trigger
GREEN LED
R5
R8
R3
R2
R4
504
V I S I O N 1 4 8 0 I N S T A L L G U I D E