Emerson Rosemount Oxymitter 4000 Reference Manual page 42

Rosemount Oxymitter 4000
42
4. If using the optional ceramic diffusion element, the vee deflector must be correctly
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 position. Retighten the setscrews. The
ambient temperature of the electronics housing must not exceed 70°C (150.° F)
For higher ambient temperatures, we recommend the remote mounted
electronics option.
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 Hazardous 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 compound 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.
CAUTION
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.
July 2018
Installation