Emerson Process Management NGA2000 HFID 用户手册

748297-E 

June 2003 

Rosemount Analytical Inc.    A Division of Emerson Process Management                                                               Installation 

2-9

Model NGA2000 HFID 

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, hydrocarbon 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 exhaust, and 

bypass are vented to atmospheric pres-
sure. The pressure 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 prevent 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 tem-

perature. 

•  The sample, zero, and span gases are 

at the correct temperature. 

•  The heated line to have over tempera-

ture protection. 

•  The sample, bypass, and burner ex-

haust 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.