VoiceAlert User Manual
or making using of WirelessAlert 433MHz Repeaters to ensure signal
strength is sufficient when measured at the Base Receiver.
4.3.3 Metal structures
Metal roofing/walls and other large metal structures are not suitable for
mounting Sensors onto or under as they can either block the radio signal
completely or substantially reduce signal strength. Even if the metal
structure is a couple of meters away from the Sensor, this can still cause
interference. Reposition the Sensor/s at least ten meters away from metal
structures. Ask your agent to assist you in repositioning the Sensor/s and
or making using of WirelessAlert 433MHz Repeaters to ensure signal
strength is sufficient when measured at the Base Receiver.
4.3.4 Spider/ insect interference
Ants and small spiders can enter the Sensor through the small hole in the
base of the Sensor. They tend to build nests / webs which can eventually
cause short circuits on some of the sensitive electronics.
Remove any insects and clean out the nest/web with a soft dry brush (soft
paintbrush).
If insect problems persist, you may need to plug the hole in base of the
Sensor with electrical tape or silicone.
4.3.5 Misty conditions
Misty conditions can act as a shield against radio signals. This will be
obvious if on a sunny day, your Base Receiver receives signals from
Sensors, but not on misty days. You can install outdoor repeaters and or
high gain antennas to rectify the signal strength. Contact your Agent to for
assistance with repositioning sensors and or placement of the repeaters to
maximise signal strength.
4.3.6 Persistent mist / fog
If there is thick persistent mist / fog in your area then moisture may enter
through the small hole in the base plate and collect on some of the
sensitive electronics. This may decrease signal strength substantially, and
or the battery may short circuit and run flat very quickly. If you are going to
be installing Sensors in extremely misty conditions then wrap strong
electrical tape around the entire Sensor to seal it completely. You must
also be very careful to make sure that the Sensor cover plate is correctly
replaced with its seal in place after changing batteries to prevent moisture
ingress.
4.3.7 Base Receiver’s UPS backup battery is flat
If you are using the UPS backup battery to operate your Base Receiver
always make 100% sure the UPS battery remains fully charged (charger
connected) otherwise you signal reception will appear reduced (Sensor will
appear to not be triggering the Base Receiver from far away). Always
make sure the charger is connected to the UPS and charge the UPS for at
least twelve hours before using it out in the field without charger
connected.
Copyright InFocus Trading 111 cc, 2009
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