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Instruction Manual
748332-F
April 2003
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-3
Model NGA2000 NDIR
1-4 SAMPLE REQUIREMENTS
Maximum allowable sample pressure is 690
hPa-gauge (10 psig) for a standard
configuration NDIR that has a flow restrictor
which sets the flow at between 0.5 L/min. to 1
L/min. Special high pressure cells (up to 10,350
hPa-gauge, 150 psig) are available. Sample
temperature range is 0°C to 55°C, and
maximum dewpoint is 40°C. The sample must
be filtered to exclude particulates larger than 2
microns in size. Consult factory for special
configurations with specifications outside of
those listed above.
1-5 PURGE KITS
A purge kit for the motor source or motor
source/flowing reference cell accompanies
some NDIR modules. The purpose of these kits
is to improve performance and accuracy
through the reduction of ambient CO
2
interference. They do not provide protection
from explosion hazard. The purge gas vents
into the case, which has no outlet fitting for
these types of purge gases.
1-6 FEATURES
Among the features available in the NDIR
Analyzer Module are:
• Pressure compensation for barometric
fluctuations (optional)
• Flow sensing