
wLSN | Reference Guide | 9.0 wLSN Inertia Detector
38 Bosch Security Systems, Inc. | 3/07 | F01U009440-01
9.1.1 Gross Attack Sensitivity
The Gross Attack setting measures vibration activity for a specified
length of time. There are four settings:
• Low
• Low to Medium
• Medium to high
• High
The settings determine the length of time vibration activity is
measured.
9.1.2 Minor Attack
Programming at the control panel determines how many repetitive
taps (single vibrations) detected by the sensor indicate a minor
attack. The Minor Attack setting is either enabled or disabled. If it
is enabled, there are two settings:
• Four Taps
• Eight Taps
When a tap occurs, a 90-sec timer starts. If the tap count exceeds
the four or eight count threshold within 90 sec, an alarm is
transmitted.
A single tap such as a branch in the wind lightly brushing a
window can start the minor attack timer and tap count. To
avoid false alarms, do not use the Minor Attack setting
where there is potential for stray vibrations.
9.2 Test Mode
The unit is automatically in Test mode for the first 10 minutes after
power up.
The green LED flashes:
• Once to indicate initialization is complete and the unit is in
Test mode
• Twice to indicate a Minor Attack test
• Three times to indicate a Gross Attack test
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