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Instruction Manual
760004-A
February 2002
1-4 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 HFID
1-5 SPECIFICATIONS
a. General
Measurement Species ....................Total hydrocarbons
Ranges (H2/He Fuel)
Low range.............................. 0 to 10 ppm, CH4, through 0 to 1%, CH4 at an oven setpoint be-
tween 113°C and 191°C
High range ............................. 0 to 50 ppm, CH
4
, through 0 to <5%, CH
4
at an oven setpoint be-
tween 113°C and 191°C
Analysis Temperature.....................Adjustable from 200
o
F to 400
o
F (93
o
C to 204
o
C), maintained within
±11
o
F (±6
o
C) from the setpoint.
Repeatability....................................≤1% of fullscale for successive identical samples, at a constant
temperature, sample flow and fuel, burner air, regulated air and
sample pressures
Min. Detectable Level......................0.10 ppm, CH
4
Noise ................................................≤1% of fullscale, peak to peak
Linearity............................................≤±1% of fullscale, ≤±2% of data point (must be above the minimum
detectable level)
Response Time ...............................≤1.5 sec., 0% to 90% of fullscale
Drift
Zero....................................... ≤ ±1% of fullscale/24 hours at constant temperature, sample flow,
hydrocarbon concentration of supply gases, and
fuel, burner air, regulated air and sample pres-
sures.
Span...................................... ≤ ±1% of fullscale/24 hours at constant temperature, sample flow,
hydrocarbon concentration of supply gases, and
fuel, burner air, regulated air and sample pres-
sures.
Effect of Temperature.................... ≤±2% of fullscale for any ambient temperature change of 10
o
C and
rate of change less than 10
o
C/hr.
Operating Temperature................. 59°F to 95°F (15°C to 35°C)
Power Requirements.......................+24 VDC ±5%, 120 W max. direct to Analyzer Module
Ripple and Noise: <100 mV pp
Line and Load Regulations: <1%
b. Physical
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
Weight ........................................... 15.9 kg (35 lbs.)
Mounting........................................ Horizontally, custom-installed in a panel