Emerson Process Management OXYMITTER 4000 - Manual (Page 53)

Instruction Manual
IB-106-340C Rev. 4.1
July 2004
Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-7
Hazardous Area Oxymitter 4000
4. If using the optional ceramic diffusion
element, the vee deflector must be cor-
rectly oriented. Before inserting the
Hazardous Area Oxymitter 4000, check
the direction of flow of the gas in the
duct. Orient the vee deflector so the
apex points upstream toward the flow
(Figure 2-6). This may be done by
loosening the setscrews and rotating
the vee deflector to the desired posi-
tion. Retighten the setscrews.
5. In vertical installations, ensure the
system cable drops vertically from the
Hazardous Area Oxymitter 4000 and
the conduit is routed below the level of
the electronics housing. This drip loop
minimizes the possibility that moisture
will damage the electronics. See Figure
2-7.
6. If the system has an abrasive shield,
check the dust seal gaskets. The joints
in the two gaskets must be staggered
180 degrees. Make sure the gaskets
are in the hub grooves as the Hazard-
ous Area Oxymitter 4000 slides into the
15 degree forcing cone in the abrasive
shield.
NOTE
If process temperatures will exceed
200°C (392°F), use anti-seize com-
pound on the stud threads to ease
future removal of the Hazardous Area
Oxymitter 4000.
7. Insert probe through the opening in the
mounting plate and bolt the unit to the
plate.
NOTE
To maintain CE compliance, ensure a
good connection exists between the
mounting plate studs or earthing
screws on electronics housing and
earth.
8. Ensure the Hazardous Area Oxymitter
4000 is properly earthed by way of
both internal and external points.
Uninsulated stacks or ducts may
cause ambient temperatures around
the electronics to exceed 85°C (185°F),
which may cause overheating damage
to the electronics.
9. If duct work insulation is removed for
Hazardous Area Oxymitter 4000 probe
mounting, make sure the insulation is
replaced afterward. See Figure 2-7.
NOTE
For probe temperatures that will exceed
85°C (185°F), we recommend the remote
mounted electronics option.
10. Ensure the probe installation does not
obscure the warnings on the housing
covers.
VEE
DEFLECTOR
VEE
DEFLECTOR
CERAMIC
DIFFUSION
ELEMENT
SETSCREW
FILTER
GAS FLOW
DIRECTION
APEX
27540009
Figure 2-6. Orienting the Optional Vee Deflector
2