Rosemount Oxymitter 4000, Инструкционный бюллетень

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IB-106-340
2-1
SECTION II. INSTALLATION
Before installing this equipment, read the
“Safety instructions for the wiring and
installation of this apparatus” at the front
of this Instruction Bulletin. Failure to
follow the safety instructions could result
in serious injury or death.
2-1. MECHANICAL INSTALLATION.
a. Selecting Location.
1. The location of the Oxymitter 4000 in the
stack or flue is most important for maximum
accuracy in the oxygen analyzing process.
The Oxymitter 4000 must be positioned so
the gas it measures is representative of the
process. Best results are normally obtained if
the Oxymitter 4000 is positioned near the
center of the duct (40-60% insertion). Longer
ducts may require several Oxymitter 4000
units since the O
2
can vary due to stratifica-
tion. 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 32° to 1300°F (0° to
704°C). Figures 2-1 through 2-6 provide me-
chanical installation references. The ambient
temperature of the integral electronics hous-
ing must not exceed 149°F (65°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
reading. Therefore, either make the necessary
repairs or install the Oxymitter 4000 upstream
of any leakage.
3. Ensure the area is clear of internal and
external obstructions that will interfere with
installation and maintenance access to the
membrane keypad. Allow adequate clear-
ance for removal of the Oxymitter 4000
(Figure 2-1 or 2-2).
Do not allow the temperature of the
Oxymitter 4000 integral electronics to
exceed 149°F (65°C) or damage to the
unit may result.
b. Installation.
1. Ensure all components are available to
install the Oxymitter 4000. If equipped with
the optional ceramic diffusion element,
ensure it is not damaged.
2. The Oxymitter 4000 may be installed intact
as it is received.
NOTE
An abrasive shield is recommended for high
velocity particulates in the flue stream (such
as those in coal-fired boilers, kilns, and re-
covery boilers). Vertical and horizontal
brace clamps are provided for 9 ft and 12 ft
(2.75 m and 3.66 m) probes to provide me-
chanical support for the Oxymitter 4000.
Refer to Figure 2-6.
3. Weld or bolt adapter plate (Figure 2-5) onto
the duct.