Vision 1330B, Owner'S Manual, Page: 45 / 48

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ADJUSTING THE SHOCK SENSOR
The shock sensor is factory preset to work
well with most vehicles out-of-the-box. How-
ever, if you find that the siren is going off too
easily, or if the siren doesn’t go off when you
think it should, it’s time to adjust the sensi-
tivity.
Turn the orange sensitivity adjustment knob clockwise to increase sensitiv-
ity and counter-clockwise to decrease . If you cannot find a suitable adjust -
ment level, consider remounting the shock sensor.
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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, jackhammer
operation adjacent to the vehicle, hurricane/typhoon, large explosions/fire -
works, large animals ramming against the vehicle, etc. If any of these
extreme cases are anticipated, you can avoid false siren triggers simply
by arming the system with the Sensor Bypass Method, which ignores the
shock sensor (see page 6 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 hot weather and increase sensitivity in cold weather.
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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.
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