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Instruction Manual
748297-E
June 2003
Rosemount Analytical Inc. A Division of Emerson Process Management Preface -
P-3
Model NGA2000 HFID
WARNING.
HIGH TEMPERATURE
This equipment is used in the analysis of sample gases at temperatures of up to 250°C. All compo-
nents and material in contact with the sample, the oven and the burner can reach this temperature
level.
Operate this equipment only when covers are secured. Servicing requires access to "hot" parts
which can cause serious injury. Refer servicing to qualified personnel.
NOTE
This Analyzer Module is completely leak-tested at the factory for gas leakage. The user is responsi-
ble for testing for leakage at the inlet and outlet fittings on the rear panel (with a test procedure
chosen by the user). The user is also responsible for leak-testing periodically and if any internal
pneumatic components are adjusted or replaced. See leak test instructions in Section 2-4k on page
2-4.
WARNING
PARTS INTEGRITY
Tampering with or unauthorized substitution of components may adversely affect safety of this
product. Use only factory-approved components for repair.
CAUTION
PURGE AIR REQUIREMENTS
This Analyzer Module must be used in conjunction with a device (Control Module or PC Interface)
that can actively monitor network variables related to pressure or flow of the continuous dilution
purge, or the front panel LEDs of the Analyzer Module, as installed, must be visible. The purpose of
this requirement is to maintain adherence to ANSI/NFPA 496 standard which assures the continued
viability of the purge system. Under no circumstances should any pressure or flow indicator be
connected to the PURGE AIR OUT outlet of the Analyzer Module because this may affect the sealing
performance of the module.
CAUTION
PRESSURIZED GAS
This module requires calibration with a known standard gas. See General Precautions for Handling
and Storing High Pressure Gas Cylinders on page P-5.