Omega DPG409 SERIES User Manual page 43

Also, if the antennas are mounted just barely off the ground, over half of the
Fresnel zone ends up being obstructed by the earth resulting in significant
reduction in range. To avoid this problem, the antennas should be mounted high
enough off of the ground so that the earth does not interfere with the central
diameter of the Fresnel zone.
It is important to understand that the environment may
change over time due to new equipment or machinery being
installed, building construction, etc. If new obstacles exist
between your meter and receiver, the devices can be raised
on one end or on both ends to clear the Fresnel Zone of
obstructions.
Installing your meter in an application were the unit will
be exposed to ambient temperatures above or below the
operating limits specified in this manual will damage your
unit and cause the unit to malfunction and produce incorrect
operation.
Your meter has been shipped to you with a standard
approved antenna. Use of any other antenna than what's
supplied with your meter will void all FCC, IC and CE
regulatory compliance.
Environment
Omega's wireless end devices and receiver units have been designed to be fixed
mounted and operated in a clean environment. Care should be taken to prevent
the components of your wireless system from being exposed to moisture, toxic
chemicals and extreme cold or hot temperature that are outside the specifications
listed in this manual.
The following is a list of basic good practice you should apply when operating
your wireless system.
• Never operate your wireless device or receiver outside the recommended
environmental limits specified in this manual.
• Never operate your wireless end device or receiver in flammable or explosive
environments.
Optional Wireless Transmitter Operation
NOTE:
CAUTION:
NOTE:
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