Emerson Oxymitter 4000 Specifications download pdf (Page 55)

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.

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