Last Updated: 19/05/2020
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Contrec 515 – GN05 Natural Gas Flow Computer

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Part Number: 515 – GN05 Categories: ,
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    Questions? Call +604-502 1894 Mon-Fri 8:30am to 5:30pm or Email [email protected]

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    Questions? Call +604-502 1894 Mon-Fri 8:30am to 5:30pm

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    Free phone and email tech support continues as long as you own the product. Click here for contact information.

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  • Contrec 515 Series with GN05 application is a natural gas flow computer. This application measures the volume, mass and gross heat content of natural gas. The instrument uses single or stacked differential pressure inputs, as well as temperature and pressure sensor inputs.

    This natural gas flow computer calculates the flow according to AGA-3 differential pressure equations. The flow calculations incorporate the conditions at which the flowmeter was calibrated and accurately account for the thermal expansion effect.

    The AGA-8 Detail Characterization Method is used to obtain accurate values of density and compressibility factors for the flow calculations. For other gas properties, such as viscosity and isentropic exponent, the AGA-3 recommended values are used.

    CALCULATIONS

    The gas density and compressibility factor calculations are based on the AGA-8 equations. The calculations are valid for the region:

    -130°C < t < 400°C P < 280MPa

    -200°F < t < 760°F P < 40000psia

    FORMULAS

    volume flow =Mflow/ρflow

    corrected flow = Mflow/ρ ref

    Heat flow = Mflow•Hm

    Where:

    Mflow = mass flow

    ρflow = density at flow conditions

    ρ ref = density at reference conditions

    Hm = mass gross heating value

     

    Displayed Information

    The front panel display shows the current values of the input variables and the results of the calculations. A list of the variables for this application and their type (total or rate) is shown at the end of this document.
    The instrument can be supplied with a real-time clock for data logging of over 1000 entries of the variables as displayed on the main menu.

    Isolated Outputs

    The opto-isolated outputs can re-transmit any main menu variable. The type of output is determined by the nature of the assigned variable. Totals are output as pulses and rates are output as 4-20 mA signals. One output is standard, a second output is available as an option.

    Relay Outputs

    The relay alarms can be assigned to any of the main menu variables of a rate type. The alarms can be fully configured including hysteresis. Two relays are standard with additional two relays available as an option. All set-up parameters, totals and logged data are stored in non-volatile memory with at least 30 years retention.

    Software Configuration The instrument can be further tailored to suit specific application needs including units of measurement, custom tags, second language or access levels. A distributor can configure these requirements before delivery.
    Instrument parameters including units of measurement can be programmed in the field, according to the user access levels assigned to parameters by the distributor.

    Temperature and Pressure Input Types

    Temperature sensor input(s) can be either PT100, PT500, 4-20 mA, 0-5 V or 1-5V signals. Pressure sensor input(s) can be either 4-20 mA, 0-5 V or 1-5V signals

    Product Highlights

    • Tailored for differential pressure meters with single or stacked transmitters
    • AGA-8 Natural Gas Detail Characterisation Method calculations for gas compositions with up to 21 components
    • Gross heating values calculated to ISO 6976:1995 and GPA Standard 2172-96
    • AGA-3 DP flow calculations
    • Allows for non-linear correction
    • Selection of second language and user tags
    • RTC logging with over 1000 entries
    • Infra-red communications port on front panel
    • Pulse width and scaling of pulse output
    • 4-20mA retransmission
    • Selectable protocols on serial ports including Modbus RTU and printer output
    • Front panel adjustment of 8-24V DC output voltage
    • Backlit Display
    • LCD Backup

    Datasheet:  Contrec 515 – GN05 Datasheet

    Instruction Manual: Contrec 515 – GN05 Instruction Manual

    celectric logo

    Questions? Call +604-502 1894 Mon-Fri 8:30am to 5:30pm

    Setup, Configuration and Technical Support of our Products are FREE.

    We help to check your faulty Instruments too, fill in the form here

    Free phone and email tech support continues as long as you own the product. Click here for contact information.

    close-link
    celectric logo

    Questions? Call +604-502 1894 Mon-Fri 8:30am to 5:30pm or Email [email protected]

    FREE Domestic AND SEA Shipping!

    Most orders RM500/USD120 or more ship SEA for FREE!

    • Delivery within the Southeast Asia only.
    • Hazardous items excluded.
    • Extremely heavy or bulky items excluded.
    • Distributors, Resellers and OEMs excluded.
    • Contact us for shipping charge for orders < RM500/USD120
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