Rosemount Oxymitter 4000, Инструкционный бюллетень

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IB-106-340
2-13/2-14
Do not use 100% nitrogen as a low gas
(zero gas). It is suggested that gas for the
low (zero) be between 0.4% and 2.0% O
2
.
Do not use gases with hydrocarbon
concentrations of more than 40 parts per
million. Failure to use proper gases will
result in erroneous readings.
2-5. PNEUMATIC INSTALLATION (FOR OXY-
MITTER 4000 WITH SPS 4000).
a. Calibration Gas Connections. Locate the
1/4 in. calibration gas fittings on the SPS 4000
manifold (Figure 2-2). Connect O
2
calibration
gas 1 (high calibration gas) to the HIGH CAL
GAS IN fitting and O
2
calibration gas 2 (low
calibration gas) to the LOW CAL GAS IN fitting.
Ensure the calibration gas pressure is set at 20 psi
(138 kPa).
b. Reference Air Connection (Optional). If the
reference air option (which includes the reference
air flowmeter, pressure regulator, and necessary
tubing and fittings) is used, connect the instru-
ment air to the 1/4 in. fitting on the reference air
pressure regulator (Figure 2-2). The pressure
regulator is factory set at 20 psi (138 kPa). Read-
just by turning the knob on the top of the regula-
tor to obtain the desired pressure.
If the SPS 4000 does not have the reference air
option, connect the reference air to the Oxymitter
4000 as instructed in paragraph 2-4.
NOTE
Upon completing installation, make sure that the Oxymitter 4000 is turned on
and operating prior to firing up the combustion process. Damage can result
from having a cold Oxymitter 4000 exposed to the process gases.
During outages, and if possible, leave all Oxymitter 4000 units running to
prevent condensation and premature aging from thermal cycling.
If the ducts will be washed down during outage, MAKE SURE to power down
the Oxymitter 4000 units and remove them from the wash area.