Emerson 3081FG - Manual (Page 19)

Instruction Manual
IB-106-3081 Rev. 1.5
September 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-1
Model 3081FG
SECTION 2
INSTALLATION
2-1 PRE-INSTALLATION
a. Inspect
Carefully inspect the shipping container for
any evidence of damage. If the container is
damaged, notify the carrier immediately.
b. Packing List
Confirm that all items shown on the packing
list are present. Notify Rosemount Analytical
immediately if items are missing.
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 instruc-
tions could result in serious injury or
death.
2-2 MECHANICAL INSTALLATION
Avoid installation locations near
steam soot blowers.
a. Locating Oxygen Probe
1. The location of the oxygen probe in
the stack or flue is important for maxi-
mum accuracy in the oxygen analyzing
process. The probe must be positioned
so 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-
60% insertion). Longer ducts may re-
quire several analyzers since the O
2
can vary due to stratification. A point
too near the wall of the duct, or the in-
side 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 550° to 1600°C
(1022° to 2912°F). Figure 2-1 provides
mechanical installation references.
2. Check the flue or stack for holes and
air leakage. The presence of this con-
dition will substantially affect the accu-
racy of the oxygen reading. Therefore,
either make the necessary repairs or
install the probe upstream of any
leakage.
3. Ensure the area is clear of internal and
external obstructions that will interfere
with installation and maintenance ac-
cess to the probe. Allow adequate
clearance for probe removal (Figure
2-1).
b. Installing Oxygen Probe
The probe was specially packaged to
prevent breakage due to handling. Do
not remove the padding material from
the probe until immediately before
installation.
1. Ensure all components are available to
install the probe.
NOTE
Leave the probe inner protective cover
in place until installation. This is re-
quired to protect the ceramic cell dur-
ing movement.
2. If using an optional adapter plate
(Figure 2-2) or an optional mounting
flange (Figure 2-3), weld or bolt the
component onto the duct. The through
hole in the stack or duct wall and re-
fractory material must be 2 in. (50.8
mm) diameter, minimum.
2