From natural gas to flare stack, the CVA-100 is the ideal instrument for monitoring the heating value of hydrocarbon streams.Request a Quote
The Wobbe Index (WI) expresses the heating value (known as calorific value) of gases used as fuels, taking into account the proportionality of calorific value to the specific gravity, or the density ratio between the given fuel gas and air. More precisely, the specific gravity is proportional to flow velocity through a constant orifice size at a constant pressure, and thus proportional to gas calorific value.
The CVA-100 puts continuous Wobbe Index monitoring and control in the hands of fuel gas producers, distributors, or anyone requiring WI readings for process optimization.
The CVA-100 uses VCSEL tunable diode laser technology to measure the residual oxygen value of sample combustion.
The primary purpose of the CVA-100 sample conditioning panel is to pyrolyze the sample (i.e. controlled combustion).
Note: All performance specifications are subject to the assumption that the sample conditioning system and unit installation are approved by Applied Analytics. For any other arrangement, please inquire directly with Sales.
|Measurement Principle||tunable diode laser spectroscopy|
|Sample Conditioning||Complete system utilizes mass flow controllers to continuously mix sample gas with oxygen at a precise fuel:air ratio and pass the resultant mixture through a furnace tube heated to 1100 °C; after combustion, the sample is routed to the flow cell for residual oxygen measurement.|
|Analyzer Calibration||If possible, analyzer is factory calibrated with certified calibration fluids; no re-calibration required after initial calibration; measurement normalized by Auto Zero|
|Reading Verification||Simple verification with samples|
|Human Machine Interface||Industrial controller with touch-screen LCD display running ECLIPSE™ Software|
|Data Storage||16GB Solid State Drive|
|Analyzer Environment||Indoor/Outdoor (no shelter required)|
|Ambient Temperature||Standard: 0 to 35 °C (32 to 95 °F)
Optional: -20 to 55 °C (-4 to 131 °F)
To avoid radiational heating, use of a sunshade is recommended for systems installed in direct sunlight.
|Sample Temperature||Max: 1300 °C (32 to 95 °F)|
|Sample Pressure||Max: 10 bar abs.|
|Electrical||85 to 264 VAC 47 to 63 Hz|
|Power Consumption||45 watts|
|Standard Outputs||1x galvanically isolated 4-20mA analog output per measured analyte(up to 3; additional available by upgrade)
2x digital outputs for fault and SCS control
|Optional Outputs||Modbus TCP/IP; RS-232; RS-485; Fieldbus; Profibus; HART;|
|Size||Analyzer: 24" H x 20" W x 8" D (610 x 508 x 203 mm)|
|Weight||Analyzer: 32 lbs. (15 kg)|
|Enclosure||Standard: wall-mounted carbon steel NEMA 4 enclosure|
|Accuracy (Wobbe Index)||45-50 range: ±0.2%|
|Accuracy (CARI)||13-16 range: ±0.2%|
|Linearity||Better than 1%|
|Span Drift||< 2% of measurement range|
|Zero Drift||< 1% per year|
The following certifications are available.
|NEC||Class I, Division 1, Groups C & D; AEx d IIB T3|
|CEC||Class I, Division 1, Groups C & D; AEx d IIB T3|
|ATEX||Exp II 2(2) GD|
|GOST||Russian Gosstandart Pattern Approval|