Series 2500 Total Hydrocarbon Analyzer
▪Operates on 100% H2 , 40/60% H2 /N2 or H2 /He Fuel Mixes
▪Methanizer Option to measure CO and CO2
▪Consistent, Precise, Flexible
▪19” Rack Mount or Bench Top
The GOW-MAC Series 2500 microprocessor-controlled total hydrocarbon analyzer is designed to continuously measureconcentrations of hydrocarbons and, utilizing an optional catalytic methanizer, CO and CO2 in gas streams.
Principal of Operation
The flame ionization detector (FID) operates on the principle that the electrical conductivity of a gas is directly proportional to the concentration of charged particles within the gas. Ionized carbon atoms are produced when burned in a hydrogen flame. Positive ions, negative ions and electrons present between an electrode gap decrease the gap resistance and cause an electrical current to flow across the gap.1 The resulting voltage decrease is detected and then reported as a concentration.
Applications
The instrument provides long term stability and accurate performance in a multitude of gas manufacturing facilities and laboratory applications, such as:
▪ Gas purity certification
▪ UHP inert gas contaminant analysis
▪ Carbon bed breakthrough detection
▪ HC monitoring in CO2 feed streams in the food/beverage industry
▪ Process monitoring
▪ Monitoring ambient air and other gases
▪ Monitoring of HC emissions
▪ R&D laboratory applications
Features
▪ Flame Ionization Detector (FID)
▪ Methanizer to measure CO and CO2 on -CM model
▪ High resolution 7 inch graphical LCD touchscreen
▪ Flameout indicator with fail-safe gas shut-off
▪ Auto ranging across 4 ranges
▪ Auto zero and remote calibration
▪ Programmable relays for concentration alarms
▪ Electronic flow control of air, fuel, and sample gases
▪ Real-time data logging by USB and serial port
The Series 2500 analyzer incorporates a flow system that can be used for ambient air analysis where low levels of hydrocarbons are monitored on a continuous basis.
Flow Control
Fuel and air flow are controlled by mass flow controllers. Sample flow to the detector is controlled by an electronic back pressure regulator with control feedback from a mass flow meter. Bypass sample flow through the back pressure regulator delivers rapid reponse to hydrocarbon change in the sample stream.
Ordering Information
115 V 230 V
Model Model
2500 2502 Total Hydrocarbon Gas Analyzer,standard
2500-CM 2502-CM Total Hydrocarbon Gas Analyzer with catalytic methanizer
Specifications
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Detector
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Flame Ionization (FID)
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Ranges
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User selectable nominal ranges. Upper limits are functions of signal.
Range 1: 0 - 25.00 ppm
Range 2: 0 - 250.0 ppm
Range 3: 0 - 2,500 ppm
Range 4: 0 - 25,000 ppm
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Linear Range (+/-5%)
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0.0034 g/sec (12,750 ppm CH4 )
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Dynamic Range
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0.0095 g/sec (0 to 35,560 ppm CH4 )
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High Concentration Analysis
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Limits are a function of lower sample flow.
Range 4: 0 – 10% CH Dynamic Range: 0 – 10% CH 4 4
Linear Range: 4% CH4
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Sensitivity
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Average of various samples: 3630 Asec/g
Best case CH4 in N2 : 2916 Asec/g
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Minimum Detectability
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Average of various samples: 0.018 ppm CH4
Best case CH4 in N2 : 0.013 ppm CH4
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Repeatability
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± 1% of full scale for 5 successive samples
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Accuracy
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99.9% per individual linear range/99.45% per full scale
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Drif
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Zero and span, 24 hr. constant ambient temperature, spanned at 10 ppm: < 0.2% of span
Zero and span, variable ambient temperature from 18 to 32 °C, spanned at 10 ppm: < 0.2% of span
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Response Time
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(Measured between 0 and 1007 ppm CH4 in N2 on range 3. Independent of inlet pressure)
Rising to 90% of final reading (sec): 16
Rising to 95% of final reading (sec): 18
Rising to 100% of final reading: < 4 min.
Falling to 10% of starting reading (sec): 16
Falling to 5% of starting reading (sec): 18
Falling to 0% of starting reading: < 6 min.
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Communications
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Analog: 4-20 mA, 0-5 VDC
Digital: RS-232 serial, USB data logging
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Relays
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Programmable relays for two (2) high/low concentration alarms
(2) 1A alarm relays and (1) ready relay
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User Interface
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7-inch graphical resistive LCD touchscreen
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Gas Parameters
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Sample: 25 ccpm typical flow to FID. Inlet pressure range 10 to 100 psig. Sample bypass flow is mini
mum at 10 psig up to about 1 lpm at 100 psig inlet pressure
Air for FID: 300 ccpm maximum flow, UHP grade (99.999%), supplied at 20 to 100 psig
Fuel for FID (Safety and minimum detectability are among considerations when selecting fuel gas
type. Fuel mix is required for oxygen sample)
100% hydrogen 40 ccpm maximum flow, UHP grade (99.999%), supplied at 20 to 100 psig
40% H2 - 60% N2 mix 100 ccpm maximum flow, UHP grade (99.999%), supplied at 20 to 100 psig
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Gas Process Connections
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1/8-inch compression fitting
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Ambient Temperature
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15 °C to 35 °C (59 °F to 95 °F) stable ambient temperature for best p
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Power Requirement
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2500: 120 W at 115 VAC, 60 Hz, 2500-CM: 180 W at 115 VAC, 60 Hz
2502: 120 W at 230 VAC, 50 Hz, 2502-CM: 180 W at 230 VAC, 50
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Dimensions
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7 in (17.8 cm) H x 19 in (48.3 cm) W x 21 in (53.4 cm) D
Front panel height 4U fits 19-inch-wide EIA standard rack
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Weight
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2500 or 2502: 24 pounds (11 kg) 2500-CM or 2502-CM: 27 pounds (13 kg) |
