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Liquid Flow (Table #51)

General Configuration for Liquid Flow Calculation

Configure the liquid flow calculation and enable it from the General page.

Calculation: Enable/disable the liquid flow calculation here.

Descriptor: Enter a text string that identifies the calculation.

Meter ID: Enter a text string that identifies or names the device associated with thecalculation.

Flow Type: Select whether a turbine or orifice meter is used.

API Table Used: Select the API table to be used for this calculation. Options are listed

below.

Table 23/24 A Table 23/24 B Table 24 C Old Table 23/24 Table 23/24 E Table 53/54 A Table 53/54 B Table 54 C Old Table 53/54 Propylene (CH 11.3.3) Ethylene (API 2565) Ethylene (NBS 1045)

Turbine Pickup: If you selected turbine as the flow type, select a single or dual turbinemeter pickup pulse.

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SG Override: To use a live API/SG/density input, enter '0' in this field. Otherwise, enterthe API/SG/density override value.

Atmospheric Pressure: Enter the current atmospheric pressure in psi measured at theinstallation site.

K-Factor: Enter the meter's K-Factor.

Include HYC Fact: If you selected an API A/B table, enter the glass hydrometercorrection factor. Refer to API Chapter 9 or other appropriate density/hydrometerstandards for further explanation.

Contract Hour: Enter the time of day that the flow computer stores an archive in thedaily historical log and starts a new set of averages and accumulations for a new day.

ASTM 1250 Selection: Select the ASTM standard being used (ASTM1250-1980 or ASTM1250-2004).

Meter Pulse Hz: This is a read-only field that displays the current meter pulse.

Meter Accumulator Pulse: Connect this field to a live value (typically a #20-PhysicalAccumulator entry).

Current Product Index: This field displays the index of the product that is currently

running.Reference Temperature: Enter the correction temperature used to calculate SG at 60For density at 15F. The default is to 60.

BS&W % (Water Cut): Enter the volume percentage of BS&W (basic sediments andwater).

Meter Active Threshold Hz: This entry determines when a batch starts. If flowmeterinput (Hz) is greater than this value, a batch will start.

Pulse Deviation Threshold: This field is available if you selected a dual turbine meterpickup pulse. If pulse frequency exceeds this value, the system will begin comparing andtotalizing error counts.

Density Type: If measuring density, select the type. Options are listed below.

None 420 mA: If you select 420 mA as the density type, choose the input type

(SG, API, Density) in the Density Input Select field.

Density Calc #1#6: Select one of these options if you are using adensitometer and have configured a density calculation.

Density Input Select: Select the density input type. Options are: SG, API, density.

Static Pressure: Enter the current line pressure measured on the pipe, or connect thisfield to a live value (typically a #16-Physical Analog Input entry).

Temperature: Enter the temperature of the fluid, or connect this field to a live value(typically a #16-Physical Analog Input entry).

Reference Density: If you selected ethylene or propylene as the API table being used,enter density value used to calculate net flow rate.

Alpha T (E-6): If you selected a table C as the API table being used, enter the thermalexpansion coefficient.

Error Pulse Hz: If you selected a dual turbine meter pickup pulse, this field displays thecurrent error pulse.

Error Accumulator Pulse: If you selected a dual turbine meter pickup pulse, connect thisfield to a live value (typically a #20-Physical Accumulator entry).

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Density Temperature Selection: Select whether the meter temperature or densitytemperature is being used.

Density Pressure Selection: Select whether the meter pressure or density pressure isbeing used.

Density Temperature: Enter the density temperature.

Density Pressure: Enter the density pressure.Month Start Day: Enter the day of the month which starts a new contract month.

Error Count Limit: If any unbalance exists in the two pulse trains and the error countsexceed this threshold, the AutoEXEC will issue an alarm. The error counts will be clearedat the end of a batch.

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