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Instruction Manual
IB-106-340CDR Original Issue
January, 2002
1-4 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Hazardous Area Oxymitter DR
This check valve or blocking valve is to
prevent breathing of the calibration gas line
and subsequent flue gas condensation and
corrosion.
g. Upgrading the Hazardous Area
Oxymitter DR
The Hazardous Area Oxymitter DR can
be easily upgraded to a full Oxymitter
4000 or 5000. This provides an economi-
cal upgrade path for users looking to pre-
serve their probe investment upon the
eventual failure of the signal conditioning
electronics. Upgrading the Hazardous
Area Oxymitter DR to a full Oxymitter
4000 or 5000 requires only the addition of
a small electronics package to the exist-
ing termination housing of the Hazardous
Area Oxymitter DR probe. The converted
unit will be a full Oxymitter 4000 or 5000
Oxygen Transmitter with the capability of
providing a 4-20 mA oxygen signal with-
out the need for an external signal condi-
tioning electronics package. HART or
Fieldbus communications are provided
with the Oxymitter electronics. See Ap-
pendix A for upgrade information.
1-3 PROBE OPTIONS
a. Abrasive Shield Assembly
The abrasive shield assembly, Figure 1-5,
is a stainless-steel tube that surrounds
the probe assembly. The shield protects
against particle abrasion and condensa-
tions, provides a guide for ease of
insertion, and acts as a position support,
especially for longer probes. The abrasive
shield assembly uses a modified diffusor
and vee deflector assembly, fitted with
dual dust seal packing.
b. Flame Arrestor Ceramic Diffusion
Assembly
The flame arrestor ceramic diffusion as-
sembly, Figure 1-3, includes a set of baf-
fles between the cell and the stack gases.
This keeps 816°C (1500°F) cell tempera-
36220005
Figure 1-3. Flame Arrestor Diffusion Assembly
tures from igniting unburned fuel in the
stack. The ceramic diffusion assembly is
also available with a dust seal for use with
the abrasive shield assembly.
c. Flame Arrestor Snubber Diffusion
Assembly
The snubber diffusion assembly, Figure 1-
4, is satisfactory for most applications.
This element is also available with a dust
seal for use with an abrasive shield.
36220006
Figure 1-4. Flame Arrestor Snubber Diffusion
Assembly