Emerson Rosemount Oxymitter DR, Справочное руководство

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2 Install
WARNING
Failure to follow safety instructions could result in serious injury or death.
Before installing the equipment, read Safety instructions .
2.1 Mechanical installation
2.1.1 Select location
The location of the transmitter in the stack or flue is most important for maximum
accuracy in the oxygen analyzing process.
Procedure
1. Position the transmitter so that the gas it measures is representative of the process.
You will obtain best results by positioning the transmitter near the center of the
duct (40 to 60 percent insertion). Longer ducts may require several transmitter
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).
Reference Manual Install
00809-0100-4880 October 2019
Rosemount Oxymitter DR 23