Contrec 515 Natural Gas Flow Computer (GN05)

Name: Contrec 515 Natural Gas Flow Computer (GN05)
Brand: Contrec
SKU: 515–GN05
Availability: InStock

SKU: 515–GN05 Category: Digital Indicators Tag: Contrec 515 Series

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The Contrec Model 515 (Application GN05) is an advanced natural gas fiscal flow computer optimized specifically for differential pressure meters operating under the international AGA-3 standard. Designed to serve as a precision accounting center for upstream orifice plates and differential elements, the software completely incorporates specialized algorithms to account for gas thermal expansion effects and primary calibration states. The hardware architecture natively supports stacked differential pressure transmitters to maximize line turndown ratios without diminishing low-flow precision. Live gas compressibility, density boundaries, and fluid Reynolds numbers are continuously evaluated via the AGA-8 Detailed Characterization Method over complex 21-component gas matrices. Enclosed in an IP65 field-mounting enclosure featuring a backlit LCD screen, it delivers robust hardware isolation and definitive audit safety. Outfitted with an adjustable 8-24V DC sensor supply, isolated 4-20mA loop retransmission, and dual-port RS-232/RS-485 Modbus RTU telemetry, the Model 515 GN05 is a premier B2B solution for high-density natural gas processing manifolds.

Key Product Features

AGA-3 DP Flow Compliance: Implements native AGA-3 differential pressure equations, combining correction variables for precise tracking of orifice thermal expansion.
Stacked Transmitter Optimization: Configured to manage dual stacked differential pressure transmitters to extend overall flow turndown limits.
AGA-8 Natural Gas Detail Math: Integrates multi-component gas variables with real-time temperature and pressure analog sensors to compute accurate density profiles.
Onboard Transducer Power Supply: Features an integrated, front-panel adjustable 8-24V DC excitation output providing up to 50mA to eliminate separate field power loops.
Extensive Operational Logging: Non-volatile flash memory combines with an internal Real Time Clock (RTC) logger to capture over 1,000 entries of process totals, logs, and diagnostic states.

Contrec Model 515 GN05 Technical Specifications
● POWER SECTION
Power Supply Options	115 Vac ±15% standard (Optional: 230 Vac ±15% layout via model code E) 12 to 28 Vdc external field loop power input
Transducer Power Output	Adjustable 8 to 24 Vdc sensor excitation voltage regulated via software controls; maximum continuous current capacity up to 50mA.
Memory Retentivity	Non-volatile flash memory permanently stores accumulative volumetric totalizers, mass logs, configuration constants, and history records during full plant power failure events.
● INPUT SECTION
Differential Pressure Inputs	Single or dual stacked analog differential pressure input channels configured for AGA-3 orifice loops. Configurable Signal Formats: 4 to 20 mA current loops, 0 to 5 Vdc, or 1 to 5 Vdc voltage signals. Signal Processing: Active filtering, programmable low-flow cutoff boundaries, and linear extraction.
Compensation Analog Inputs	Analog Temperature Input: RTD (Pt100) or linear 4 to 20 mA process loop. Analog Pressure Input: 4 to 20 mA active linear transmitter input.
● OUTPUT SECTION
Analog Retransmission Loop	Fully isolated 4 to 20 mA DC current loop retransmission output channel with programmable range scaling.
Digital Pulse Retransmission	Open collector transistor output featuring software-defined volumetric scaling factor and adjustable pulse width duration.
Serial Communications Channel	RS-232 Configuration: Standard port connection link optimized for local PC terminal setup or ticket printer attachment. RS-485 Configuration (Optional): Multi-drop serial bus supporting long-range data tracking. Supported Protocols: Modbus RTU (Slave), standard Ticket Printer, and Contrec command-line protocols.
Local Operator Interface	Backlit alphanumeric LCD display with language selection and custom tags. Showcases real-time parameters: Volume, Corrected Volume, Heat, Mass, Mass Flow, Temperature, Pressure, Differential Pressure, Reynolds Number, and Compressibility Factor.
● PERFORMANCE
Calculation Accuracy	Better than ±0.01% of reading for all internal AGA-3 orifice equations, fluid Reynolds numbers, and mathematical AGA-8 density solutions.
Analog Transmittance Precision	Better than ±0.05% of full scale range under reference conditions.
Data Logging Matrix	Integrated Real-Time Clock (RTC) logging matrix capturing over 1,000 entries for continuous process audit tracking.
● PHYSICAL
Enclosure Shell Construction	Field-mounting enclosure layout molded from high-impact chemical-resistant polymers (Available for flush panel mount, pipe track mount, or inside a heavy Ex410 explosion-proof housing).
Tactile Operator Array	Ergonomic elastomeric tactile keypad providing direct operator command interaction.
● STANDARDS CONFORMITY
Environmental Safeguarding	Standard IP65 weatherproof frontal fascia shield protection. *Note: Conformal PCB coating (Option C) is highly recommended to protect internal circuits from harsh humidity and ambient chemical corrosion.