Contrec 515-GN02 Natural Gas Flow Computer

Contrec 515 Series with GN02 application measures the volume, mass and gross heat content of natural gas by using analogue volume flow, temperature, and pressure inputs.

The Flowmeter input signal can be selected as either 0-5V, 1-5V, or 4-20mA. Minimum and maximum points are programmed, and non-linear correction points can be used to reflect the flowmeters behaviour better.

The AGA-8 Detail Characterization Method is used to obtain accurate values of density and compressibility factors for the flow calculations.

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

Mflow = volumeflow•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

Product Highlights

  • Tailored for volumetric analog input such as vortex flowmeters
  • Allows for stacked flow inputs
  • 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
  • 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 – GN02 Datasheet

Instruction Manual: Contrec 515 – GN02 Instruction Manual

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