Emerson Rosemount Analytical OPM 4000, Инструкция по эксплуатации

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Instruction Manual
IM-105-4000, Rev 1.3
October 2008
OPM 4000
2-2
INSTALLATION
CONSIDERATIONS
Choose an Installation
Site
The primary considerations for choosing a site for the OPM 4000 are
accessibility, ambient environmental conditions, and locating the unit to obtain
a representative sample of the process. The following general guidelines
should be considered.
Accessibility
Locate the instrument where it will provide safe access for periodic
maintenance and inspection. A platform or walkway is required for access to
the sensors and weather covers. The optimum condition is to have the
mounting flanges and weather covers approximately 5 feet (1,5 m) above the
floor. A minimum of 12 in. (305 mm) from the bottom of the weather cover to
the floor is required in order to remove the air filters.
Clearance
Installation clearances for the transceiver, retro reflector and optional weather
covers are shown in Figure 2-1.
Environment
Locate the stack-mounted units in an area with ambient temperatures
between -4
o
to +131
o
F (-20
ο
to 55
o
C). (Consult the factory for other
temperature ranges.) Areas that are clean and dry are desirable. Avoid areas
with condensation.
Maintenance intervals are directly related to the installation environment.
Intervals can vary from 2 to 3 months in fairly clean environments, to twice a
month in dirty environments. Lens cleaning is a function of the ambient
conditions and cleanliness of the purge air.
Choose a location that will minimize excessive vibration or shock.
Locate the control unit in an easily accessible area with temperatures
between 32
o
to 122
o
F (0
o
to 50
o
C). To permit the operator to read and/or
change controls, the unit should not be mounted higher than five feet from
floor level.
Sample Area
To achieve a representative sample, the accepted practice is to have the
measurement path of the instrument directly in the center of the stack. An
area should be chosen where the gases are not stratified in the stack or duct.
When installed near a bend, install the transceiver in the plane defined by the
bend; refer to Regulatory/Process Considerations. Avoid locations where
large amounts of condensed water is present.
Stack Exit
The transceiver should be located a minimum of two stack diameters from the
stack exit. Ideally the transciever should be installed eight to ten stack
diameters from the stack exit.