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3.0 - ALARM SIGNALS
3.1 - NARCOTIC GAS
Thedetector continuously monitors the narcotic gas concentration level in the
cabin by carrying out calculations to self-adapt to the different air quality
conditions (use in urban areas is different from use in country places).
If a sudden increase in the concentration level is detected due to narcotic
gases being sprayed in the vehicle, the detector immediately activates the
siren and the output relay.
The alarm state remains ON until the conditions which have triggered it are
present.
To deactivate the alarm, simply disconnect it.
3.2 - EXPLOSIVE GAS LPG
The detector continously monitors the LPG concentration level in the cabin; if
its concentration exceeds 10% of the LEL (Lower Explosive Limit), the detector
immediately activates the siren and the output relay.
The alarm state stays on until the conditions which have generated it are
present.
Important Note:
for LPG detection, the sensor must be installed according to
the installation instructions (see chap. 13.0).
4.0 - POWER SUPPLY
The detector can operate both at 12V or 24V, by setting the voltage switch Sl1.
!
By default, the detector is set at 12Volt.
The 911 is equipped with a relay that actuates other devices (ex. cabin
lights or vehicle horn or any other alarm device).
The relay supplies the contacts NC - C - NO on the terminal block M1 (see
connection example in par. 11).
PAGE 04 - USER MANUAL
5.0 - SELF-DIAGNOSIS
The detector is provided with an acurate and reliable self-diagnosis system
which continuously checks its performance and efficiency; any failure or the
exhaustion of the probe, after a life cycle of more than 11,000hrs, is signaled by
the yellow LED turning ON and by a warning alert signal.
When the probe is exhausted, contact an authorized dealer for
!
replacement or reconditionning of the detector.
6.0 - SENSITIVITY LEVEL SELECTION
By default, the detector is set to "normal" sensitivity; in case of particular
environmental conditions, the sensitivity can be set to "low" by opening or
interrupting jumper P1.
Jumper P1: closed = normal sensitivity
Jumper P1: opened = low sensitivity
Changing the sensitivity setting will not modify the alarm threshold
!
level for explosive gas LPG, 10% of the LEL.
7.0 - IMPORTANT CAUTIONS
!
Use only a damp cloth to clean the detector; do not use thinners (alcohol,
detergents, etc.) which could irreparably damage the detector.
!
Alcohol based cleaning agents, perfumes, deodorants, varnish thinner
fumes, insecticides and other sprays can interfere with the correct
operation of the sensor and create improper alarms and/or alter the device
sensitivity.
!
Silicone vapors in the cabin can deteriorate the detector sensing element.
USER MANUAL - PAGE 05
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