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Instruction Manual
IM-106-880C, OI
September 2009
Hazardous Area OCX 8800
2-2
MECHANICAL
INSTALLATION
Selecting Location
1. The location of the Hazardous Area OCX 8800 in the stack or flue is
most important for maximum accuracy in the oxygen analyzing process.
The probe must be positioned so the gas it measures is representative
of the process. Best results are normally obtained if the transmitter is
positioned near the center of the duct (40-60% insertion). Longer ducts
may require several transmitters since the oxygen and combustibles
can vary due to stratification. A point too near the wall of the duct or the
inside radius of a bend, may not provide a representative sample
because of the very low flow conditions. The sensing point should be
selected so the process gas temperature falls within the range of probe
material used. Figure 2-1 through Figure 2-5 provide mechanical
installation references. The ambient temperature inside the electronics
housing must not exceed 185°F (85°C).
2. Check the flue or stack for holes and air leakage. The presence of this
condition will substantially affect the accuracy of the oxygen and
combustibles readings. Therefore, either make the necessary repairs or
install the transmitter up stream of any leakage.
3. Ensure the area is clear of internal and external obstructions that will
interfere with installation and maintenance access to the unit. Allow
adequate clearance for the removal of the Hazardous Area OCX 8800.
Installation
1. Ensure all components are available to install the OCX 8800.
2. The Hazardous Area OCX 8800 may be installed intact as it is received.
3. Weld or bolt adapter plate (Figure 2-3) onto the duct.
4. Use the pipe or wall mounting hardware as shown in Figure 2-4 to
mount a remote electronics housing. Choose a location not to exceed
the length of the electronics cable ordered.
5. Ensure the conduits drop vertically from the Hazardous Area OCX 8800
and the conduit is routed below the level of the conduit ports on the
housing to form a drip loop. Drip loops minimize the possibility that
moisture will damage the electronics (Figure 2-5).
6. Where a positive stack pressure exists at the installation site, connect all
pneumatic lines prior to installing the Hazardous Area OCX 8800 in the
stack or ductwork.
Do not allow the temperature of the electronics housing to exceed 185°F (85°C) or damage
to the electronics may result.
Whenever a positive stack pressure exists at the installation site, be sure to connect all
pneumatic lines prior to installing the Hazardous Area OCX 8800 in the stack or ductwork.
Failure to connect the pneumatic lines can allow the flow of contaminants into the
Hazardous Area OCX 8800 ports.