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8 Operation
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8.5 Operation During Alarm
Searchzone Sonik features three levels of alarm. Pre-Alarm, Alarm and Overload.
8.5.1 Pre-alarm
During Pre-Alarm, the Alarm1 relay is energized/de-energized depending on its configuration. The 4-20 mA loop is set to 16 mA in
Discrete mode. It is proportional to the sound pressure level (SPL) in Proportional mode. The visual indicator flashes red.
8.5.2 Alarm
During Alarm, the Alarm2 relay is energized/de-energized depending on its configuration. The 4-20 mA loop is set to 20 mA in Discrete
mode. It is proportional to SPL in Proportional mode. The visual indicator flashes red.
8.5.3 Overload
Searchzone Sonik indicates Overload when an exceptionally high SPL is detected (>140 dB). During Overload, the Fault relay is
additionally energized/de-energized depending on its configuration. The 4-20 mA loop is set to >20 mA in both Discrete mode and
Proportional mode. The visual indicator flashes red.
Searchzone Sonik indicates Fault for thirty seconds after the Overload condition is no longer detected.
Note
Searchzone Sonik logs 10 minutes of recording for each of the last 5 verified alarms. The 10 minutes are divided into 5 minutes before
and 5 minutes after the alarm.
Searchzone Sonik − Technical Manual
PN 2331M1220 Issue 1
11/2018
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