Emerson World Class 3000 Manual de instrucciones descargar pdf (Pagina 19)

Instruction Manual

106-300NFX Rev. 4.2

January 2002

Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-1

World Class 3000

SECTION 2

INSTALLATION

2-1 OXYGEN ANALYZER (PROBE)

INSTALLATION

Before probe installations, consult

probe Safety Data Sheet 1M03226.

The probe and probe abrasive shield

are heavy. Use proper lifting and

carrying procedures to avoid

personnel injury.

Install all protective equipment covers

and safety ground leads after installa-

tion. Failure to install covers and

ground leads could result in serious

injury or death.

a. Selecting Location

1. The location of the probe in the stack

or flue is most important for maximum

accuracy in the oxygen analyzing pro-

cess. The probe must be positioned so

that the gas it measures is representa-

tive of the process. Best results are

normally obtained if the probe is posi-

tioned near the center of the duct (40

to 60% insertion). A point too near the

edge or wall of the duct may not pro-

vide a representative sample because

of the possibility of gas stratification. In

addition, the sensing point should be

selected so that the process gas tem-

perature falls within a range of 10° to

704°C (50° to 1300°F). Figure 2-1

provides you with mechanical installa-

tion references.

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 necessary

repairs or install the probe upstream

of any leakage.

3. Ensure that the area is clear of

obstructions internal and external that

will interfere with installation. Allow

adequate clearance for removal of

probe (Figure 2-1).

Do not allow the temperature of the

probe junction box to exceed 150°C

(302°F) or damage to the unit may

result. If the probe junction box tem-

perature exceeds 150°C (302°F), the

user must fabricate a heat shield or

provide adequate cooling air to the

probe junction box.

b. Mechanical Installation

1. Ensure that all components are avail-

able for installation of the probe. Check

the ceramic filter to ensure that it is not

damaged and that the system cable is

the required length.

2. The probe may be installed intact as it

is received. It is recommended that you

disassemble the adapter plate for each

installation.

3. Weld or bolt adapter plate (Figure 2-1)

onto the duct.

2

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