Emerson Process Management NGA2000 HFID Manual Do Utilizador

748297-E 

June 2003 

Rosemount Analytical Inc.    A Division of Emerson Process Management                                   Description and Specifications 

1-5

Model NGA2000 HFID 

Sample .......................................... Non-flammable, below 100% of LEL 

Flow rate ..............................1.0 to 2.5 L/min. 
Supply pressure...................345 to 620 hPa-gauge (5 to 9 psig) 
Temperature ........................110

o

C to 230

o

C (230

o

F to 446

o

F), <20

o

C variance/24 hours, <10

o

C 

variance/hr. 

Particulates ..........................filtered to <2 microns 
Dewpoint..............................<15

o

C below the setpoint 

Regulated Air................................. Instrument air or nitrogen 

Flow rate ..............................2 to 4 L/min. 
THC .....................................

≤2 ppm, CH

4

 

Supply pressure...................689 to 1723 hPa-gauge (10 to 25 psig) 
Particulates ..........................filtered to <2 microns 

Purge Air:....................................... Instrument air, nitrogen or other nonflammable gas (refer to 

ANSI/NFPA 496 for the requirements for the Protective Gas Sys-
tem) 

Flow rate:  ............................16 to 18 L/min. 
Supply pressure:..................689 to 1378 hPa-gauge (10 to 20 psig) 

Fuel Gas ........................................ Premixed 40% hydrogen and 60% helium 

Flow rate ..............................80 to 100 ml/min 
THC .....................................

≤0.5 ppm, CH

4

 

Supply pressure...................3101 to 3446 hPa-gauge (45 to 50 psig) 

 

Burner Air ...................................... Zero-grade air 

Flow rate ..............................350 to 400 mL/min. 
THC .....................................

≤1 ppm, CH

4

 

Supply pressure...................1723 to 3446 hPa-gauge (25 to 50 psig) 

 

Case Classification ........................ General purpose for installation in weather-protected area 

Maximum Separation .................... 1600m (1 mile) from Analyzer Module to Platform 

Materials in Contact With Sample . Stainless steel and glass-filled teflon 

Dimensions.................................... See Outline and Mounting Dimensions, Figure 2-5 on page 2-7 

Weight ........................................... 15.9 kg (35 lbs.) 

Mounting........................................ Horizontally, custom-installed in a panel