Avlite AV-OL-CMI Manuale di installazione e assistenza - Pagina 10
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6.0 Operation and Setup
Avlite's AV-OL-CMI is a robust wired LED light. The light fixture is available in universal DC input and can be configured
to operate 24 hours a day, illuminated white for day time operation and red for night time operation (depending on
product type).
Avlite's combined medium intensity obstruction lights are designed to operate over a small voltage range. There is
a vast array of power sources that can be utilized for Avlite's medium intensity obstruction lights. However, the vast
majority of customer power supplies comprise of either Photovoltaic Power. Contact Avlite for advice when designing
your power supply.
When powered up, the light will constantly check day/night status using its internal ambient light sensor. The ambient
light sensor averages its measurement for 30 seconds.
FAA:
By default the lights turn ON when the ambient light decreases to not less than 35 footcandles (376.7 lux) and
turn OFF when the ambient light decreases to not more than 60 footcandles (645.8 lux).
ICAO:
By default the lights turn ON when the ambient light decreases to not less than 100 lux and turn OFF when the
ambient light increases to not more than 150 lux.
If the light detects a LED failure the alarm relay can be used to provide a feedback to the user.Light intensity &
operation mode setting for FAA or ICAO compliant light fixture
The fixture will be supplied with either the FAA or ICAO compliant optic as specified by product type. The CMI comes
preset to the intensity setting required to produce the required photometric profiles for either an FAA (L-864, 865, 885,
866 or applicable combinations) or ICAO (Type A,B,C, or applicable combinations) compliant fixture in Day and Night
mode and does not need to be set by the user.
Note: The ICAO Model and FAA Model have their own unique optic. The ICAO model cannot be used for FAA purposes
and the FAA model cannot be used for ICAO purposes. The model required needs to be specified at the time of order.
6.1 GPS Syncronisation
Avlite has utilised the latest advancements in GPS technology to develop an internal synchronisation system that
is incorporated into the lights. Using overhead satellites, multiple obstruction lights set to the same flash pattern
are able to flash in synchronisation (for CMI FAA L-864,865,866 and 885 or ICAO Type A and B only). No additional
power supplies, aerials or control systems are required, and with its microprocessor- based system, the GPS option is
specifically designed to provide maximum reliability and performance over a wide range of environmental conditions.
Operating Principle
Each light operates independently and requires no operator intervention. A minimum of 4 satellites need to be in
view for the built-in GPS receiver to collect time data. At dusk, the light sensor will turn the light on. If time data is
available, the CMI will come on synchronised to every other obstruction fixture with the same selected flash code.
Synchronisation is achieved using an internal algorithm based on the highly accurate time base and time data received
from the satellites. The satellite data is provided from a number of earth stations using atomic clocks as the time base.
Continuous self-checking ensures that the lights will continue to run in synchronisation.
Light Activation
At power-up the microprocessor checks that the internal GPS module is programmed correctly and is able to provide
valid time base and time data. Once outside with a clear view of the sky, valid data should become available within 20
minutes.
Note: Lights will not synchronise if different flash codes are selected.
Medium Intensity Obstruction Light
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AV-OL-MI