Rosemount Oxymitter 5000, Instruction Manual

Page: 34 / 214

Hazardous Area Oxymitter 5000
2-2
Instruction Manual
IM-106-350C, Rev 2.2
July 2008
MECHANICAL
INSTALLATION
Selecting Location
1. The location of the Hazardous Area Oxymitter 5000 in the stack or flue
is most important for maximum accuracy in the oxygen analyzing
process. The Hazardous Area Oxymitter 5000 must be positioned so
the gas it measures is representative of the process. Best results are
normally obtained if the Hazardous Area Oxymitter 5000 is positioned
near the center of the duct (40 to 60% insertion). Longer ducts may
require several Hazardous Area Oxymitter 5000 units since the O
2
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 a range of 0° to
704°C (32° to 1300°F). Figure 2-1 through Figure 2-5 provide
mechanical installation references.
The ambient temperature of the electronics housing must not exceed
70°C (150°F). For higher ambient temperatures, we r ecommend the
remote mounted electronics option.
NOTE
At temperatures up to 85°C (185°F) inside the housi ng, the infrared keypad
will cease to function, but the transmitter will continue to operate properly.
2. Check the flue or stack for holes and air leakage. The presence of this
condition will substantially affect the accuracy of the oxygen reading.
Therefore, either make the necessary repairs or install the Hazardous
Area Oxymitter 5000 upstream of any leakage.
3. Ensure the area is clear of internal and external obstructions that will
interfere with probe installation and access to the membrane keypad or
LOI. Allow adequate clearance for removal of the Hazardous Area
Oxymitter 5000 (Figure 2-1 or Figure 2-3).
Probe Installation
1. Ensure all components are available to install the Hazardous Area
Oxymitter 5000. If equipped with a ceramic diffuser, make sure the
diffuser is not damaged.
2. The Hazardous Area Oxymitter 5000 probe may be installed intact, as it
is received.
NOTE
An abrasive shield is recommended for high velocity particulates in the flu
stream (such as those in coal-fired boilers, kilns, and recovery boilers).
3. Weld or bolt mounting plate (Figure 2-5) onto the duct.
Do not allow the temperature of the Hazardous Area Oxymitter 5000 electronics to exceed
85°C (185°F) or damage to the unit may result.