ABB XFCG4 6413 - XFCG4 Configuration; Table 9 Configurable Calculations Factors

102 XFC G4 2103335 Rev AB
5.7 XFCG4 Configuration
5.7.1 Contract Hour
A flow computer can be programed to begin the contract day based on contract or company standards. When a flow computer
first powers up the contract is preset to begin at midnight.
IMPORTANT NOTE: Midnight is 00 o’clock. If any value entered is greater than 23, the FLOW COMPUTER forces
the value to 00 (midnight).
5.7.2 Log Period
Log period is the specified length of time between writing the calculated accumulated volume to record. Volumes may be
recorded as often as every minute and as seldom as every hour. The default is 60 minutes. The flow computer can normally
store 960 log periods (40 days x 24 logs). A 5 minute log period will consume available memory in 8 days.
Description
Options
Log Period
1,2,5,10,20,30,60
5.7.3 Volume Calculation Period
Volume Calculation Period is the specified length of time between volume calculations. The Volume Calculation Period must be
equally divisible into the Log Period. The default is 60 minutes.
Description
Options
Volume Calculation Period
1,2,5,10,20,30,60
5.7.4 Calculated Method
When the flow computer is powered up initially, the calculation method must be set. The calculation method may be set to AGA-
3 1985, AGA-3 1992, AGA-7 or liquid. Once the calculation type has been determined, it is possible to toggle specific factors on
or off depending upon their availability (see Table 9).
IMPORTANT NOTE: Calculation types, and many of the factors involved with setting up the calculations, are
usually dictated by the sales contract or by company policy.
Table 9 Configurable Calculations Factors
Calculation Parameter
Configurable
AGA-3
1985
AGA-3
1992
Fpb (Pressure Base Factor)
Yes
N/A
Ftb (Temperature Base Factor)
Yes
N/A
Fg (Specific Gravity Factor)
Yes
N/A
Fb (Orifice Factor)
Yes
N/A
Ftf (Flowing Temperature Factor)
Yes
N/A
Y (Expansion Factor)
Yes
Yes
Fr (Reynolds Number)
Yes
N/A
Fa (Orifice Thermal Expansion Factor)
Yes
N/A
**Fpv (Supercompressibility Factor)
Yes
Yes
*Fw (Water Vapor Factor)
Yes
Yes
*Faux (Full Well Stream Factor)
Yes
Yes