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OPM 3000
Figure 1-2. Transceiver
Assembly with Weather Cover
1-4
Control Unit
Filter
Weather
Cover
Control Unit
Mounted in a control room environment, the OPM 3000 control unit provides
instrument control functions (Section 4: Normal Operation for details).
Optional Air Purge Weather Cover System
The transceiver and reflector may be mounted in weather covers. The
weather covers are fairly compact to allow movement around them even on a
three-foot walkway or platform. They protect the stack-mounted components
from dirt, moisture, stack temperatures within the specified ambient
temperatures limits, and errant air currents around the stack.
The air purge system constantly circulates air past the optical window. The
airflow is directed through the hose to an air plenum on the stack side of the
optical window. The airflow in the air plenum area results in reduced pressure
and increased velocity. This venturi effect tends to continually draw the air
around the optical window into the purge air stream, thereby keeping the lens
clean for long periods.
Alignment System
The OPM 3000 includes a built-in through-the-lens alignment system. The
alignment target can be viewed through a window on the transceiver.
Adjustments to changes in alignment are provided by a 3-point alignment
system, which is integral to the air plenum.
Cabling
The standard cabling used between the stack-mounted units and the control
unit is at minimum a 2-pair, #22 AWG, twisted, shielded cable. More pairs or
larger than 20 AWG is acceptable.
Transceiver
Duplexer
Instruction Manual
IM-105-3000, Rev 2.0
November 2008
Mounting
Plate
Air Blower
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