Emerson Rosemount Oxymitter 4000, Reference Manual, Page: 38 / 198

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. Select the sensing point so the process gas
temperature falls within a range of 32 to 1300 °F (0 to 704 °C).
Figure 2-1 through
Figure 2-7 provide mechanical references.
The ambient temperature of the electronics housing must not exceed 150 °F
(70 °C). For higher ambient temperature, Emerson recommends the remote
mounted electronics option.
Note
In highly abrasive applications, rotate the shield 90 degrees at normal service
intervals to present a new wear surface to the abrasive flow stream.
2. Check the flue or stack holes for air leakage. Make any necessary repairs or install
the transmitter upstream of any leakage.
Holes and leakage substantially affect the accuracy of the oxygen reading.
3. Ensure that 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 transmitter.
CAUTION
Damage to the unit may result.
Do not allow the temperature of the transmitter electronics to exceed 185 °F (85
°C).
Install Reference Manual
October 2019 00809-0100-4340
38 Emerson.com/Rosemount