Contrec 515 Ideal Gas Flow Computer (GC01)

Name: Contrec 515 Ideal Gas Flow Computer (GC01)
Brand: Contrec
SKU: 515–GC01
Availability: InStock

SKU: 515–GC01 Category: Digital Indicators Tag: Contrec 515 Series

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The Contrec Model 515 (Application GC01) is a high-accuracy industrial general gas flow computer engineered specifically to compute the volume, corrected volume, and mass flow of vapor and non-liquefied gas lines. Designed to handle a wide range of industrial utility gases, this sophisticated processing core interfaces with a frequency volume flow input alongside companion analog temperature and pressure sensors. Gas properties and compressibility factors are dynamically calculated using industry-standard equations of state, applying a simplified parameter set to resolve compressibility and actual gas quantity with minimal processing lag. To safeguard fiscal loops and custody transfer operations against data tampering, the instrument incorporates a weather-tight IP65 frontal fascia that supports dual-channel quadrature flow tracking for ISO 6551 Level B pulse security. Outfitted with an adjustable 8-24V DC sensor excitation supply, isolated 4-20mA loop retransmission, and dual RS-232/RS-485 Modbus RTU telemetry ports, the Contrec 515 GC01 delivers robust data integrity for automated factory grids and distributed gas balancing networks.

Key Product Features

Standardized Industry Gas Math: Utilizes recognized gas equations of state to quickly and accurately determine compressibility factors and true fluid quantities.
ISO 6551 Level B Pulse Security: Accepts dual-channel quadrature frequency inputs to validate raw pulse counts and prevent signal miscounts or line tampering.
Universal Frequency Interfacing: Smart program selection allows the flow input to cleanly process frequency signals from millivolts, reed switches, Namur proximity switches, and pulse trains.
Integrated Transducer Power Output: Eliminates auxiliary field wiring overhead by delivering a software-controlled 8-24V DC excitation supply to power connected flowmeters.
Comprehensive Audit Trail Logging: Onboard non-volatile flash memory and a built-in Real Time Clock (RTC) capture over 1,000 entries of totals, averages, and system alarms.

Contrec Model 515 GC01 Technical Specifications
● POWER SECTION
Power Supply Options	115 Vac ±15% standard 230 Vac ±15% option (Model code selection 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 & Data Security	Non-volatile flash memory permanently stores accumulative volumetric totalizers, data logs, hardware constants, and system configurations during full plant power failure events.
● INPUT SECTION
Flowmeter Signal Input	Single or dual frequency input channels supporting Quadrature Pulse Signals for maximum transmission security. Compatible Types: Low-level millivolt, contact closure reed switches, Namur proximity sensors, or open collector pulse trains. Frequency Range: 0Hz minimum to 10kHz maximum signal bandwidth.
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 Infrastructure	RS-232 Port: Dedicated port optimized for direct PC terminal setup or local ticket receipt printing. RS-485 Port (Optional): Multi-drop serial bus supporting robust long-distance plant networking. Supported Protocols: Modbus RTU (Slave), standard Ticket Printer, and Contrec command-line protocols.
Local Display Screen	Backlit alphanumeric LCD display showcasing raw Volume, Volume Flowrate, Corrected Volume, Corrected Flowrate, Mass, Mass Flowrate, Temperature, Pressure, and Compressibility Factor.
● PERFORMANCE
Calculation Accuracy	Better than ±0.01% of reading for all internal flow metrics, mass equations, and mathematical gas density calculations.
Analog Transmittance Precision	Better than ±0.05% of full scale range under reference conditions.
Data Logging Matrix	Real-Time Clock (RTC) event log memory block capturing over 1,000 entries for continuous process audit tracking.
● PHYSICAL
Mechanical Housing Layout	Molded field-mounting enclosure utilizing high-rigidity impact polymers (Optional flush panel mount, pipe track mount, or deployment within a heavy Ex410 explosion-proof housing).
Tactile Operator Array	Robust elastomeric keyboard layout providing precise tactile user input feedback.
● STANDARDS CONFORMITY
Environmental Safeguarding	Standard IP65 weatherproof frontal fascia shield protection. *Note: Conformal PCB coating (Option C) is required for maximum environmental operating range and to avoid damage from moisture and corrosion.