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Instruction Manual
760004-A
February 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 2-9
Model NGA 2000 HFID
2-7 INSTALLATION CONSIDERATIONS CHECK-
LIST
Verify the following:
• The Analyzer’s location should
be:
Clean
A well ventilated area
weatherproofed
Non-hazardous
Vibration-free
Have stable ambient temperature
• The gas cylinders should be
equipped with a clean, hydrocar-
bon free two stage regulator and
shut off valve.
• All external tubing, regulators,
valves, pumps, fittings, etc. are
clean.
• The correct fuel type is being
used.
• The THC content of the supply
gases are compatible with the
analysis range.
• The calibration background
gases are similar to the sample.
• The purge air out, burner ex-
haust, and bypass are vented to
atmospheric pressure. The pres-
sure should be constant.
• The burner exhaust tube must be
slanted down a minimum of 6
degrees from horizontal.
• The bypass line connection must
be slanted down a minimum of 6
degrees from horizontal for
drainage of water condensation.
• If required, thermal insulation
around the bypass fitting to pre-
vent condensation in the bypass
restrictor.
• If required, thermal insulation for
the sample inlet connection to
minimize the cold spot.
• The heated line is at the correct
temperature.
• The sample, zero, and span
gases are at the correct tem-
perature.
• The heated line to have over
temperature protection.
• The sample, bypass, and burner
exhaust tubing material must
handle high temperature and
have thermal insulation to protect
from burns.
• The purge air out tubing to be
3/8 inch and less than 4 feet in
length.
• All external gas connections
have been leak checked.
• The dead volume for external
sample and fuel lines have been
minimized.
• The stainless steel tubing used
for the fuel and sample lines is
clean.