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Instruction Manual
760004-A
February 2002
2-2 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
graph-grade tubing. Thoroughly clean before
use (if a hydrocarbon-based cleaning solvent
such as acetone is used, purge tubing with dry
nitrogen or helium for several minutes before
using.)
Gas line connections are compression fittings.
Do not use pipe thread tape.
Since the oxidation of hydrogen is accompanied
by the formation of water vapor, the Exhaust
tubing always should be slanted downward at
least 6 degrees from horizontal. Otherwise,
water may accumulate in the line, causing back
pressure and noisy readings, or may back up in
the line and flood the burner. Depending on
the percent of water vapor in the sample,
the sample bypass out connection may
have condensation. Proper drainage may
be required.
If the sample is toxic or noxious, or is to be
reclaimed, connect the Bypass outlet to a
suitable disposal system. Do not use any
device that may cause back pressure in the
line.
Purge air and burner air should be supplied
from separate sources.
Figure 2-1. Back Panel Connections
Danger d'electrocution, d'explosion ou d'emanation de gaz
toxique. Se refere aux details inscrits surla face du module.
PURGE
AIR IN
PURGE
AIR OUT
PRESSURE
RELIEF
VALVE
BURNER
AIR IN
HEATED
SAMPLE IN
VENT TO SAFE AREA
SLOPE DOWNWARD 6
°
MINIMUM
FUEL
IN
BURNER
EXHAUST
OUT
REGULATE
D
MAXIMUM
INPUT
PRESSURE
HEATED
SAMPLE
BYPASS OUT
Possible electric shock, explosion or toxic gas hazard. See front of module
ATTENTION
FUEL: 50 psig(3445 hPa)
BURNER AIR: 50 psig (3445 hPa)
SAMPLE: 8 psig (551 hPa)
PURGE AIR: 20 psig (1378 hPa)
REG AIR: 25 psig (1722 hPa)
ATTENTION
WARNIN
G
WARNING
CHAUD !
!
!
HOT !