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Instruction Manual
IB-106-3081 Rev. 1.5
September 2002
1-6 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model 3081FG
DUCT
STACK
GASES
PRESSURE
REGULATOR
FLOWMETER
OPTIONAL
ADAPTER
PLATE
4-20 mA SIGNAL
26020038
MODEL 3081
TRANSMITTER
OXYGEN
PROBE
INSTRUMENT
AIR SUPPLY
(REFERENCE AIR)
Figure 1-3. Typical System Installation
A source of instrument air is required at the
oxygen probe for reference air use. Since
the Two-Wire In Situ Oxygen Analyzer is
equipped with an in-place calibration fea-
ture, provisions should be made for con-
necting calibration check gas tanks to the
oxygen probe during calibration.
If the calibration check gas bottles are to be
permanently connected, a check valve is
required next to the calibration fittings on
the integral electronics.
This check valve is to prevent breathing of
calibration check gas line and subsequent
flue gas condensation and corrosion. The
check valve is in addition to the stop valve
in the calibration check gas kit.
NOTE
The electronics of the Model 3081
Transmitter is rated NEMA 4X (IP65)
and is capable of operating at tem-
peratures up to 65°C (149°F).
Retain the packaging in which the
Rosemount Two-Wire In Situ Oxygen
Analyzer arrived from the factory in
case any components are to be
shipped to another site. This packag-
ing has been designed to protect the
product.