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Instruction Manual
748374-F
March 2003
1-4 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA2000 TO2
1-5 SPECIFICATIONS
a. General
Measurement Species................... Trace Oxygen
Ranges .......................................... 0 to 100 ppm (output scalable down to 0-2 ppm fullscale)
Accuracy........................................ ±3% of reading or ±0.02% of range (except for ranges ≤ 100 ppm:
±3% of reading or ±0.05% of range)
Sensitivity ...................................... <10 ppb Oxygen
Noise ............................................. 1% of fullscale, peak to peak
Linearity......................................... ±1% of fullscale
Response Time ............................. Typically 90% in less than 20 seconds
Zero Drift........................................ ≤±1% of fullscale/24 hours at constant temperature
Span Drift....................................... ≤±1% of fullscale/24 hours at constant temperature
Effect of Temperature.................... 0.32% of reading per °F from 70°F
(0.58% of reading per °C from 21°C)
Effect of Flow................................. ≤2% of reading for a flow change of ±250 cc/min (0.5 SCFH)
Operating Temperature................. 32°F to 113°F (0°C to 45°C)
Power Requirements..................... +24 VDC ±5%, 10 W max.
Ripple and Noise: <100 mV peak to peak
Line and Load Regulations: <±1%
b. Sample
Sample .......................................... Non-flammable (below 100% of the LEL)
Flow Rate ...................................... 0.5 to 1.5 L/min.
Supply Pressure ............................ 1027 to 1082 hPa - absolute (0.2 to 1.0 psig)
Temperature.................................. 32°F to 113°F (0°C to 45°C)
Particulates.................................... filtered to <0.1 mg/L; non-condensing at ambient temperature
Sample Humidity ........................... non-condensing at ambient temperatures
c. Physical
Materials in contact with sample ... Stainless steel, Teflon, Delrin, neoprene
Dimensions.................................... See Figure 2-2. Trace Oxygen Analyzer Outline and Mounting
Dimensions on page 2-3
Weight ........................................... 6.8 kg (15 lbs.)
Mounting........................................ Horizontal, external to Platform or custom installed in a panel
Case Classification........................ General Purpose for installation in weather protected area
Max. Separation from Platform...... 1600 m (1 mile)
d. Gas Connections
Sample In ...................................... 1/4 inch O.D. tube fitting
Sample Out.................................... 1/4 inch O.D. tube fitting
See the Preface Section of the Platform manual for specifications regarding Platform related components.