Flow Computer Calculations - ABB XSeries G4 6200 User Manual

Complete log period flow and operational records that are reported hourly
(default), including:
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Complete daily flow records, including:
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Complete daily operation statistics, including:
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1.1.3 Flow computer calculations

The records and statistics generated are based on the following calculation
methods of the G4 EX:
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2104349 rev. AD
Average static pressure
Average differential pressure
Average flowing temperature
Integral
Corrected volume total
Corrected energy total
Operating status and alarms
Flow time
Average static pressure
Average differential pressure
Average flowing temperature
Average extension
Corrected volume total
Corrected energy total
Operating status and alarms
Percent flowing time
Percent back flow time
Percent out of limits (programmable) on SP, DP, Tf and flow rate
Minimum and maximum values for SP, DP, Tf and flow rate
Calculation of flow rates and volumes in accordance with AGA 3–85, AGA
3–92, AGA-7 or ISO-5167.
Calculation of flow rates and volumes in accordance with AGA-8 92 Gross
or Detail or NX-19 Supercompressibility Standards.
Calculation of flow extension for the AGA3-92 equation is
once per second.
The flow extension reported for the log period is:
Dp * Sp
/ 3600 * flow

Tf 459 . 67
Calculation of the flow extension for the AGA3-85 equation is
once per second.
Extrapolation of flow accumulation during transducer calibration or
calibration checks.
Selection of all coefficients for calculation; the calculation of dynamic factors
(dependent upon DP, SP and Tf) using averages is based on one second
samples.
time in sec onds
Dp * Sp
,

Tf 459 . 67
Dp * Sp
,
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