Emerson Process Management OXYMITTER 4000 - Manual (Page 47)

Instruction Manual
IB-106-340C Rev. 4.1
July 2004
Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-1
Hazardous Area Oxymitter 4000
SECTION 2
INSTALLATION
The Hazardous Area Oxymitter 4000
and probe abrasive shield are heavy.
Use proper lifting and carrying proce-
dures to avoid personal 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.
2-1 MECHANICAL INSTALLATION
a. Selecting Location
1. The location of the Hazardous Area
Oxymitter 4000 in the stack or flue is
most important for maximum accuracy
in the oxygen analyzing process. The
Hazardous Area Oxymitter 4000 must
be positioned so the gas it measures
is representative of the process. Best
results are normally obtained if the
Hazardous Area Oxymitter 4000 is
positioned near the center of the duct
(40 to 60% insertion). Longer ducts
may require several Hazardous Area
Oxymitter 4000 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 proc-
ess 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 elec-
tronics housing must not exceed 70°C
(150°F). For higher ambient tempera-
tures, we recommend the remote
mounted electronics option.
NOTE
At temperatures up to 85°C (185°F)
inside the housing, the infrared keypad
will cease to function, but the transmit-
ter will continue to operate properly.
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 Hazardous Area Oxymitter
4000 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 4000
(Figure 2-1 or Figure 2-3).
Do not allow the temperature of the
Hazardous Area Oxymitter 4000 elec-
tronics to exceed 85°C (185°F) or dam-
age to the unit may result.
b. Probe Installation
1. Ensure all components are available to
install the Hazardous Area Oxymitter
4000. If equipped with a ceramic dif-
fuser, make sure the diffuser is not
damaged.
2. The Hazardous Area Oxymitter 4000
probe 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 recovery
boilers).
3. Weld or bolt mounting plate (Figure
2-5) onto the duct.
2