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Instruction Manual
760004-A
February 2002
P-4 Preface Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
WARNING.
POSSIBLE EXPLOSION HAZARD
Ensure that all gas connections are made as labeled and are leak free. Improper gas connections
could result in explosion or death.
CAUTION.
OVER-VOLTAGE SPIKING
If this analyzer module is used with a non-Rosemount Analytical power supply, adding Rosemount
Analytical PN 903341 Current Protector in series with the 24V positive power line will prevent over-
voltage spiking and resultant fuse blowing when powering up the instrument.
CAUTION .
PRESSURIZED ENCLOSURE
This enclosure shall not be opened unless the area is known to be free of flammable materials or
unless all devices within have been de-energized.
Area classification for the protected enclosure:
Nonclassified.
Pressurization: Type Z
Temperature Identification Number: T4A
Power shall not be restored after enclosure has been opened (or loss of purge) until enclosure has
been purged for a minimum of 6 (six) minutes at the minimum pressure of 689 hPa (10 psig).