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Instruction Manual
IM-105-3000, Rev 2.0
November 2008
Mounting the Air Plenum
and Weather Covers
Use the following procedure to mount the air plenum and weather covers.
The control unit, transceiver and retro reflector serial numbers must match in order to
ensure accurate measurements.
After the installation site has been selected and the platform requirements
have been met, the mounting flanges should be installed and aligned as
described in "Installation of Stack Flanges". Flanges should be installed with
the mounting faces on the vertical plane.
NOTE
Before installing the transceiver, retro reflector, or any type of weather cover,
remove the air plenum from both the transceiver and retro reflector. Removal
will make the installation easier with less of a chance of damage while
attaching the air plenums and optional weather covers.
1. Verify that the control unit, transceiver and retro reflector serial numbers
match.
2. If an air plenum is attached to either the transceiver or retro reflector,
un-clip the hold-down latch, swing open and lift up and off the hinge pins
(Figure 2-6). Place the transceiver and retro reflector in a safe place.
3. If the OPM 3000 is equipped with weather covers, remove the two
weather cover hood hinge pins located on the upper right and left hand
corner of the hood.
NOTE
The air plenum and weather cover are attached to the customer supplied 3 in.
pipe flange by four 2-1/2 in. long 5/8-11 bolts.
4. Working from the 3 in. pipe
(Figure 2-5):
a. gasket
b. mounting plate
c. gasket
d. mating flange and air plenum
5. Place a flat washer onto each of the four 5/8-11 bolts.
6. Once aligned, place the 5/8-11 bolt and flat washer through the top hole
of the middle plate so it is flush against the mating flange.
7. Place a split lock washer over the end of the bolt and secure with a nut.
Repeat for the remaining three mounting bolts.
flange,
assemble in the following order
OPM 3000
2-9
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