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Instruction Manual
760008-A
September 2001
1-4 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 TO2
1-5 SPECIFICATIONS
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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 tem-
perature
Sample Humidity ........................................... non-condensing at ambient temperatures
c. Physical
Materials in contact with sample ................... Stainless steel, Teflon, Delrin, neoprene
Dimensions....................................................See Figure 2-2, Outline and Mounting Dimensions
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)
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See the Platform manual for specifications regarding Platform related components.