33 XFC G4 2103335 Rev AB
3.7.2 XFCG4 Capabilities
The generated records and statistics are possible due to the following capabilities of the XFC
G4
:
— Calculation of flow rates volume and coefficients per AGA-3, AGA-8 Supercompressibility standards.
— Calculation of flow extension for the AGA3-92 is
, once per second.
— The flow extension reported for the log period is:
ondsintimeflow
Tf
SpDp
sec*3600/
67.459
*
— Calculation of the flow extension for the AGA3-85 equation is
, once per second.
— Extrapolation of flow accumulation during XIMV calibration.
— Selection of all coefficients for calculation; the calculation of dynamic factors (dependent upon DP, SP and Tf) using
averages based on one second samples.
— Sample set of most recent calculations allowing subsequent verification.
— Monitoring of the operational limits, minimums and maximums to insure detection and reporting of malfunctions or abnormal
site conditions.
— Acceptance and storage of system constants from PCCU32 or remote communication protocols.
— Storage of data records and operational events determined by user (based on available SRAM).
3.7.3 Additional Features
Additional features of the Totalflow system that highlight its flexibility include the following:
— Programmable differential pressure no-flow cutoff.
— Programmable bi-level security codes to prevent unauthorized communication and configuration of the XFC
G4
or user-
configurable Role Based Security Access (RBAC).
— Internal 100Ω platinum RTD resistance curve fit with user-programmable single point offset or 3/5-point user-calibration of
the RTD input.
— Quick, simple calibration procedure for the transducer.
— Real-time clock providing a highly stable time base for the system.
— Proper battery and solar sizing is determined by geographic location of the unit and total power consumption of the system.
Totalflow project engineers can select the appropriate battery and solar requirements for the user’s specific application.
Larger capacity batteries are available to increase autonomy, if required.
— Three available power sources:
– External solar panel (standard)
– External ac or ac to dc power
– External 24 or 12Vdc power
— Liquid crystal display (LCD) programmable to allow monitoring of the flow computer operations and can display any variable
that has a register (for example, display current static pressure).
— Six available serial port communications are available on the flow computer:
– 1 dedicated – PCCU (Local Configuration port)
– 2 RS-232 or RS-485 (Board Insertion Modules) with baud rates up to 115,200
– 1 USB 1.1 Host port – optional
– 1 USB 1.1 Device port (may be used as a high speed Local Configuration port)
– 1 10 Base-T Ethernet port (may be used as a high speed Local port or Network port)
— USB, Ethernet or RS-232 serial may be ordered as local, externally accessible Local Communication Interface port
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