Remote Automation Solutions
V-Cone Flow Calculation Program
(For the FloBoss 107)
User Manual
(QER 07Q032)
D301838X012
Form A6226
July 2010
V-Cone Flow Calculation Program User Manual
Revision Tracking Sheet
July 2010
This manual may be revised periodically to incorporate new or updated information. The revision date of each
page appears at the bottom of the page opposite the page number. A change in revision date to any page also
changes the date of the manual that appears on the front cover. Listed below is the revision date of each page (if
applicable):
Page Revision
All pages Jul-10
All pages Dec-09
All pages Mar-09
Initial Issue Aug-07
NOTICE
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Bristol, Inc., Bristol Canada, BBI SA de CV and Emerson Process Management Ltd, Remote Automation Solutions division (UK), are wholly
owned subsidiaries of Emerson Electric Co. doing business as Remote Automation Solutions (“RAS”), a division of Emerson Process
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© 2007-2010 Remote Automation Solutions, division of Emerson Process Management. All rights reserved.
ii Rev. Jul-10
V-Cone Flow Calculation Program User Manual
Contents
Page
1 INTRODUCTION 1
1.1 SCOPE AND ORGANIZATION ........................................................................................................ 1
1.2 PRODUCT OVERVIEW ................................................................................................................. 1
1.3 PROGRAM REQUIREMENTS ......................................................................................................... 2
2 INSTALLATION 3
2.1 DOWNLOADING THE PROGRAM ................................................................................................. 3
3 CONFIGURATION 7
3.1 V-CONE SETUP SCREEN .......................................................................................................... 8
3.1.1 V-C
3.1.2 V-CONE SETUP – INPUTS TAB .................................................................................... 13
3.1.3 V-CONE SETUP – ADVANCED TAB .............................................................................. 15
3.1.4 V-C
3.1.5 V-CONE SETUP – SAMPLER TAB ................................................................................. 19
3.1.6 V-CONE SETUP – CALIBRATION FACTORS TAB ............................................................ 21
3.2 V-C
3.3 S
ONE VALUES SCREEN ...................................................................................................... 24
3.2.1 V-CONE VALUES –VALUES TAB .................................................................................. 26
3.2.2 V-CONE VALUES SCREEN –FACTORS TAB .................................................................. 28
AVING THE CONFIGURATION ................................................................................................. 30
ONE SETUP – GENERAL TAB ................................................................................. 10
ONE SETUP – FLUID PROPERTIES TAB .................................................................. 17
4 REFERENCE 33
4.1 CALCULATIONS REFERENCE .................................................................................................. 33
OINT TYPE 31/33: V-CONE SETUP ....................................................................................... 34
4.2 P
4.3 P
OINT TYPE 32/34: V-CONE VALUES ..................................................................................... 37
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V-Cone Flow Calculation Program User Manual
1 INTRODUCTION
1.1 Scope and Organization
®
This document serves as the user manual for the V-Cone
Flow Calculation User Program (QER
07Q032) and the Measurement Canada version of this program (QER 10Q003), which is intended for
use in a FloBoss™ 107. This manual describes how to download and configure this program (referred to
as the “V-Cone program” or “the program” throughout the rest of this manual). You access and
configure this program using ROCLINK 800 Configuration Software loaded on an IBM-compatible
personal computer running Windows
2000 (with Service Pack 2), XP, or Vista.
The sections in this manual provide information in a sequence appropriate for first-time users. Once you
become familiar with the procedures and the software running in a FloBoss 107, the manual becomes a
reference tool.
This manual has the following major sections:
Section 1 – Introduction
Section 2 – Installation
Section 3 – Configuration
Section 4 – Reference
This manual assumes that you are familiar with the FloBoss unit and its configuration. For more
information, refer to the following manuals
FloBoss 107 Flow Manager Instruction Manual (Form A6206)
ROCLINK 800 Configuration Software User Manual (for FB107) (Form A6217).
1.2 Product Overview
This program allows a FloBoss 107 Flow Manager to calculate a volumeteric flow rate (at a specified
base pressure and temperature) and a mass flow rate for a McCrometer V-Cone or Wafer-Cone
flowmeter. The V-Cone and Wafer-Cone calculations are very similar to orifice plate calculations, use
many of the same configuration parameters, and produce many of the same calculated values. The
program uses the corresponding meter run point in the FB107’s firmware to store the calculated values
and accumulations. Additional parameters are located in the program’s user-defined point types,
including actual volumetric flow rate, fluid velocity, thermal expansion factor, and percent pressure loss.
Details of the V-Cone and Wafer-Cone flow calculations are found in the McCrometer publication Flow
Calculations for the V-Cone® and Wafer-Cone® Flowmeters, Lit. #24509-54 Rev. 3.2/02-08.
The V-Cone configuration requires you enable the V-Cone calculation for the meter runs with V-Cone
or Wafer-Cone hardware installed. With the calculation enabled, the FB107 bypasses the standard
orifice calculation and performs the McCrometer flow calculations instead. All standard orifice
parameters, as well as the additional V-Cone parameters, are available for assignment to Modbus
registers, PID control loops, historical archiving, and FST functions.
The program is designed to calculate flows of natural gas and other related hydrocarbons, as defined in
AGA Report #8, 1992 and included in the FB107 firmware, or fluids whose properties are provided by a
separate user program installed in the FB107. The only fluid properties used by the V-Cone program are
the flowing density, base density, viscosity, specific heat ratio, and heating value.
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V-Cone Flow Calculation Program User Manual
1.3 Program Requirements
You download the V-Cone program to—and then run it from—the Flash and RAM memory on the
FloBoss 107. Downloa d a nd configur e t he prog r a m u sing th e R O CLINK 8 0 0 C o n f i g u r a t i o n s oftwar e
(version 1.85 or greater).
Notes:
Two versions of the program for QER 07Q032 are included. Installation and operation are identical
between the two programs, but they use different point type locations, different display numbers, and are
loaded into different program slots on the FB107. V-Cone_5.bin loads into user program location 5 and
uses point types 31 and 32. V-Cone_6.bin loads into user program location 6 and uses point types 33 and
34. Install the program version that avoids point type conflicts with currently installed programs.
You must install the Measurement Canada version of this program (QER 10Q003, V-Cone_5.bin) if
you have a Measurement Canada FB107.
This document shows the installation of V-Cone_5.bin (QER 07Q032). The installation process and
functionality is the same for all versions of the V-Cone program.
The downloadable program is:
File Name
V-Cone_5.bin
(QER 07Q032)
V-Cone_6.bin
(QER 07Q032)
V-Cone_5.bin
(QER 10Q003)
Target Unit/
Version
1.21 31, 32 11833 16384 1.85 32, 33
1.21 33, 34 11833 16384 1.85 34, 35
1.20 31, 32 11347 16384 1.85 32, 33
User Defined
Point (UDP)
Flash Used
(in bytes)
DRAM Used
(in bytes)
ROCLINK 800
Version
Display
Number
Note: You must connect a PC to the FloBoss’s LOI port before starting the download.
For information on viewing the memory allocation of user programs, refer to the ROCLINK 800
Configuration Software User Manual (for FB107) (Form A6217).
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V-Cone Flow Calculation Program User Manual
2 INSTALLATION
This section provides instructions for installing the V-Cone program into the FB107. Read Section 1.3 of
this manual for program requirements.
Note: This document shows the installation of V-Cone_5.bin (QER 07Q032). The installation process
and functionality is the same for all versions of the program.
2.1 Downloading the Program
This section provides instructions for installing the user program into FloBoss memory.
Note: Connect a PC to the FloBoss’s LOI port before starting the download.
To download the user program:
1. Start and logon to ROCLINK 800.
2. Select ROC > Direct Connect to connect to the FloBoss unit.
3. Select Utilities > User Program Administrator from the ROCLINK menu bar. The User
Program Administrator screen displays (see Figure 1):
Figure 1. User Program Administrator
4. Click Browse in the Download User Program File frame. The Select User Program File screen
displays (see Figure 2).
5. Select the path and user program file to download from the CD-ROM. (Program files are
typically located in the Program Files folder on the CD-ROM). As Figure 2 shows, the screen
lists all valid user program files with the .BIN extension:
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V-Cone Flow Calculation Program User Manual
Figure 2. Select User Program File
6. Click Open to select the program file. The User Program Administrator screen displays. As
shown in Figure 3, note that the Download User Program File frame identifies the selected
program and that the Download & Start button is active:
Figure 3. User Program Administrator
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V-Cone Flow Calculation Program User Manual
7. Click Download & Start to begin loading the selected programs. The following message
displays:
Figure 4. Confirm Download
Note: For the FB107, ROCLINK800 assigns program positions based on memory allocations.
For this reason, the V-Cone program automatically installs as program 5.
8. Click Yes to begin the download. During the download, the program performs a warm start,
creates an event in the event log, and—when the download completes—displays the following
message:
Figure 5. ROCLINK 800 Download Confirmation
9. Click OK. The User Program Administrator screen displays (see Figure 6). Note that:
The User Programs Installed in Device frame identifies the loaded program.
The Status field indicates that the program is running.
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V-Cone Flow Calculation Program User Manual
Figure 6. User Program Administrator
10. Click Close and proceed to Section 3 to configure the program.
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V-Cone Flow Calculation Program User Manual
3 CONFIGURATION
After you have downloaded and started the V-Cone program, you configure the program and view
calculation results using the ROCLINK 800 software. To do this, you use two program-specific screens
(V-Cone Setup and V-Cone Values):
Use the V-Cone Setup screen to set the parameters for the selected meter run.
Use the V-Cone Values screen to view results from the V-Cone flow calculations.
Note: Configure history points after you configure the V-Cone program. To configure history points,
refer to Table 7-1. EFM History Points (AGA 3) in Section 7.10.2 of the ROCLINK 800
Configuration Software User Manual (for FloBoss 107), Form A6217.
Figure 7. ROCLINK 800
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V-Cone Flow Calculation Program User Manual
3.1 V-Cone Setup Screen
Once you have successfully loaded the V-Cone program into the FloBoss, you can access the V-Cone
Setup screen and configure the meter runs.
To access this screen:
1. Click User Program > V-Cone Flow > Display #32, V-Cone Setup Display from the
ROCLINK configuration tree:
2. Double-click #1, Meter #1. The V-Cone Setup screen displays:
Figure 8. V-Cone Setup
Note: Six fields at the top of the screen (Point number, Program Status, Meter Tag, Meter
Description, Active Calculations – Flow, and Active Calculations – Fluid Props) appear
on all tabs.
3. Review—and change as necessary—the values in the following fields:
Field Description
Point Number
Program Status
8 Rev. Jul-10
Selects the meter run to configure. Click to display all defined instances.
Clicking a different meter run causes the screen to display the values for that
meter run.
This read-only field shows the current state of the user program. Valid
values are: Program Not Loaded, Program Loaded – Not Started,
Program Running, Program Shutting Down, License Not Found, and
Not Running – Library Version Error.
Field Description
Meter Tag
Sets the unique identifier for the selected meter.
V-Cone Flow Calculation Program User Manual
Meter Description
Active Calculations
Flow
Active Calculations
Fluid Props
Sets the description of the selected meter.
This read-only field shows the flow calculation standard currently performing
flow calculations for the selected meter run.
This read-only field shows the properties calculation standard currently
performing properties calculations for the selected meter run.
4. Click Apply to save your changes, and proceed to Section 3.1.1 to configure the General tab.
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V-Cone Flow Calculation Program User Manual
3.1.1 V-Cone Setup – General Tab
Use the General tab (which displays when you access the V-Cone Setup screen) to enable the V-Cone
flow calculation for a meter run, specify the averaging technique used by the program, and define
program-specific options.
Figure 9. V-Cone Setup, General Tab
1. Review—and change as necessary—the values in the following fields:
Field Description
V-Cone
Export to Soft Point
1
2
3
4
5
6
Enables or disables the V-Cone Flow program to perform the flow calculations
for the selected meter run. Valid selections are Enabled or Disabled.
Allows a host to access data from a softpoint if it cannot access the data
through other means. Valid values are 0 (disable the access) or 1 through 32
(enable the access and save the following values to the designated softpoint
parameter starting at Data #1 (parameter 2)):
Calculation Period (Sec)
V-Cone Beta Ratio
Velocity of Approach
Pressure Loss (% of differential pressure)
Expansion Factor
Linear Gas Velocity (Ft/Sec or M/Sec)
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V-Cone Flow Calculation Program User Manual
Export to Soft Points
(continued)
9
Correction to Contract Conditions
7
Thermal Correction Factor
8
Actual Volume Flow Rate (Cf/Sec or M
3
/Sec)
Units for Heating
Value, Alarms, and
Sampler
Flow Alarming
End Element Type
Integral Multiplier
Period (IMP)
Averaging Technique
Sets the type of units used for the heating value, alarms, and sampler of the
meter run. Valid selections are Volume, (units are BTU/CF or MJ/M3, Ft
3
or M3)
and Mass (units are BTU/Lb or MJ/Kg, Lb or Kg).
Enables or disables flow alarming for the meter. If enabled, alarm status
changes are added to the Alarm Log. Use the Alarms tab to configure the
alarms. If disabled, no alarm generates for this meter, regardless of the alarm
configuration.
Specifies the end element type of the selected meter. Valid selections are
V-Cone or Wafer-Cone.
Sets, in minutes, how frequently the system recalculates the fluid properties
and resulting Integral Multiplier Value (IMV) (per the API measurement
standard Chapter 21, Section 1).
Sets the averaging technique for determining the average differential pressure,
static pressure, and flowing temperature during each IMP for the meter run. For
further details, see API measurement standard Chapter 21, Section 1,
Appendix B. Valid selections are:
Flow Dependant
Linear
Calculates the averages for the differential pressure, static
pressure, and flowing temperature with equal weighting
given to each sample when there is flow through the meter.
For samples in which there is no flow, the value is not
included in the average. However, if there is no flow during
the IMP, averages are determined using all of the samples.
Flow Dependant
Formulaic
Calculates averages for the differential pressure, static
pressure, and flowing temperature where each sample is
raised to the power to which the parameter is raised in the
flow equation, with equal weighting given to each sample
when there is flow through meter. For samples where there
is no flow, the value is not included in the averaging.
However, if there is no flow during the IMP, averages are
determined using all of the samples. At the end of the IMP,
the resulting average is raised to the reciprocal of the
power to which the value is raised in the flow equation.
Flow Weighted
Linear
Calculates averages for the differential pressure, static
pressure, and flowing temperature with weighting for a
sample being the ratio of the flow through the meter at the
time of the sample to the total flow during the IMP. For
samples where there is no flow, the value is not included in
the average. However, if there is no flow during the IMP,
averages are determined using all of the samples.
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V-Cone Flow Calculation Program User Manual
Averaging Technique
(continued)
Active Flow Alarms
Flow Weighted
Formulaic
This read-only field shows any alarm currently active. For example, Low
indicates that the calculated flow is below the Low Alarm limit. Other alarms
can include High, No Flow, and Manual Mode.
2. Click Apply to save any changes, and proceed to Section 3.1.2 to configure the Inputs tab.
Calculates averages for the differential pressure, static
pressure, and flowing temperature where each sample is
raised to the power to which the parameter is raised in the
flow equation, with weighting for a sample being the ratio of
the flow at the time of the sample to the total flow during
the IMP. For samples where there is no flow, the value is
not included in the average. However, if there is no flow
during the IMP, averages are determined using all of the
samples. At the end of the IMP, the resulting average is
raised to the reciprocal of the power to which the value is
raised in the flow equation.
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V-Cone Flow Calculation Program User Manual
3.1.2 V-Cone Setup – Inputs Tab
Use the Inputs tab to define the inputs used by the V-Cone Flow calculation.
Note: The V-Cone selection on the General tab must be set to Enabled to view this tab.
To access this screen:
1. Select the Inputs tab on the V-Cone Setup screen. The following screen displays:
Figure 10. V-Cone Setup, Inputs tab
2. Review—and change as necessary—the values in the following fields:
Field Description
Differential Pressure
Static Pressure
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Sets the paramater for the differential pressure (or high differential pressure,
if you enabled Stacked DP). Click to display the Select TLP dialog box
you use to assign the parameter. If Manual appears, use the Values field to
enter an engineering units value for the differential pressure. Otherwise, the
Values field indicates the current value. The units for the differential pressure
are InH2O or kPa.
Sets the parameter for the static pressure. Click to display the Select TLP
dialog box you use to assign the parameter. If Manual appears, use the
Values field to enter an engineering units value for the static pressure.
Otherwise, the Values field indicates the current value. The units for the
static pressure are PSIG/PSIA or kPa(g)/kPa(a).
V-Cone Flow Calculation Program User Manual
Field Description
Temperature
Pipe Diameter
Cone Diameter
Low Flow Cutoff
V-Cone Flow
Coefficient
Sets the parameter for the flowing temperature of the fluid. Click to
display the Select TLP dialog box you use to assign the parameter. If Manual
appears, use the Values field to enter an engineering units value for the
temperature. Otherwise, the Values field indicates the current value. The
units for the flowing temperature are Deg F or Deg C.
Sets the inside diameter of the pipe near the nozzle. The units are inches or
millimeters.
Sets the diameter of the V-Cone. The units are inches or millimeters.
Sets the low flow cutoff point. When the value of the differential pressure
parameter is less than or equal to this value, the calculated flow rate is set to
zero and, if alarming is enabled, the No Flow alarm status is set and an entry
is made in the Alarm Log. The units of the low flow cutoff are InH2O or kPa.
Sets the coefficient of discharge (Cd) for the V-Cone as shown on the
information tag fixed to the body of the V-Cone tube.
Stacked DP
User Correction Factor
Low DP Input
Low DP SetPoint
High DP SetPoint
Enables the use of standard differential pressure transmitters for low and
high pressure ranges. Valid values are Enabled (use stacked DP
transmitters) or Disabled (do not allow use of stacked DP transmitters).
Sets a correction factor to adjust for instances when there is a mixture of
fluids. For example, when measuring gas containing a known percentage of
liquid, or when measuring liquid containing a known percentage of sediment.
These additional components can be adjusted out of the flow total by setting
the User Correction Factor. A value of 1.0 indicates that 100% of the fluid
being measured is the primary fluid. A value of 0.90 indicates that 90% of the
fluid being measured is the primary fluid. The default is 1.0.
Note: The User Correction Factor is implemented in version 1.21 or later of
the program.
Sets the parameter for monitoring low differential pressure. Click to
display a Set TLP dialog box you use to assign the parameter. You must
Enable the Stacked DP parameter to use this input or you can leave this
input in Manual Mode when you Disable Stacked DP.
Sets the differential pressure point at which the system switches over to the
low differential pressure input. When the High DP input is active and the
High DP reading drops below this value, the Low DP input becomes the
active input. The units are InH2O or kPa.
Sets the differential pressure point at which the system switches over to the
high differential pressure input. When the Low DP input is active and the
Low DP reading rises above this setpoint, the High DP input becomes the
active input. The units are InH2O or kPa.
3. Click Apply to save any changes, and proceed to Section 3.1.3 to configure the Advanced tab.
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V-Cone Flow Calculation Program User Manual
3.1.3 V-Cone Setup – Advanced Tab
Use the Advanced tab to define additional meter run information for the V-Cone flow calculation.
Note: The V-Cone selection on the General tab must be set to Enabled to view this tab.
To access this screen:
1. Select the Advanced tab on the V-Cone Setup screen. The following screen displays:
Figure 11. V-Cone Setup, Advanced tab
2. Review—and change as necessary—the values in the following fields:
Field Description
Atmospheric Pressure
Gravitational
Acceleration
Base Pressure
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Sets how the program determines atmospheric pressure (absolute) at the
metering location. Valid selections are Calculate (calculate atmospheric
pressure from other parameters defined on this screen) or Enter (use the
value entered in the field in this frame). The units of the atmospheric
pressure are PSIA or kPa(a).
Sets how the program determines gravitational acceleration at the metering
location. Valid selections are Calculate (calculate gravitational acceleration
from other parameters defined on this screen) or Enter (use the value
entered in the field in this frame). The units of the gravitational acceleration
are Ft/Sec
Sets, in PSIA or kPa(a), the flow measurement base pressure specified for
the base conditions.
2
or M/Sec2.
V-Cone Flow Calculation Program User Manual
Field Description
Base Temperature
Sets, in degrees Fahrenheit or degrees Celsius, the flow measurement base
temperature specified for the base conditions.
Elevation
Latitude
V-Cone Material
Pipe Material
Force Recalculation
Limit Meter Events
Pressure Tap
Sets, in feet or meters above sea level, the elevation of the metering
location.
Sets, in degrees, the latitude of the metering location.
Indicates the material from which the V-Cone is made. You must also
complete the Ref Temperature field. This indicates the reference
temperature at which the V-Cone diameter was measured, in units of
degrees Fahrenheit or degrees Celsius.
Indicates the material from which the pipe is made. You must also complete
the Ref Temperature field. This indicates the reference temperature at which
the pipe diameter was measured, in units of degrees Fahrenheit or degrees
Celsius.
Forces the program to immediately recalculate the flow without waiting for
the next normal recalculation period. Select Set and click Apply to force the
recalculation.
Note: You define normal recalculation periods using the Integral Multiplier
Period field (located on the V-Cone Setup screen’s General tab).
Sets whether the FB107 logs all flow-related events. Valid selections are
Enabled (log all events) or Disabled (do not log events).
Sets the reference of the static pressure and location of the pressure tap.
This field must match how the sensor or transmitter actually measures the
static pressure. Valid selections for pressure tap type are Gauge or
Absolute. Valid selections for the pressure tap location are Upstream or
Downstream.
3. Click Apply to save any changes, and proceed to Section 3.1.4 to configure the Fluid Properties
tab.
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V-Cone Flow Calculation Program User Manual
3.1.4 V-Cone Setup – Fluid Properties Tab
Use the Fluid Properties tab to define the fluid composition and other properties.
Note: To view this tab, the V-Cone selection on the General tab must be set to Enabled and the active
fluid properties calculation must be AGA8.
To access this screen:
1. Select the Fluid Properties tab on the V-Cone Setup screen.
Figure 12. V-Cone Setup, Fluid Properties tab
2. Review—and change as necessary—the values in the following fields:
Field Description
Compositions
FPV Method
Rev. Jul-10 17
Sets the mole percent for each gas component. If the FPV Method is
Detailed, the value in the Total Mole % field must equal 100%. If the FPV
Method is Gross1, only the mole % of CO
Method is Gross2, the mole % of CO
Sets the method of determining the compressibility factors for AGA8
calculations. Valid selections are:
Detailed
Gross1
Requires the natural gas composition in mole percent
to be entered for all components.
Requires the specific gravity of the natural gas, the
real gas gross heating value per unit volume, and the
mole % of CO
must be entered. If the FPV
2
and the mole % of N2 must be entered.
2
to be entered.
2
V-Cone Flow Calculation Program User Manual
Field Description
FPV Method (continued)
Heating Value
Heating Value Basis
Specific Gravity
Viscosity
Sp Heat Ratio
Gas Quality
Log Methane Adjust
Gross2
Note: If you choose either Gross1 or Gross2, you must manually enter
values for Specific Gravity and Heating Value on this screen
While the Detailed method provides the highest accuracy in a broad
range of measurement conditions, you can use either of the Gross
methods when:
Temperature is between 32F and 130F (0C and 54C).
Pressure is between 0 and 1200 PSIA (0 and 8274 kPa(a)).
Gas composition is within the Normal range, as defined in the 1992
AGA8 report.
Sets how the system determines the heating value of the gas. Valid
selections are Calculate (allow the system to calculate the heating value
from the gas composition data) or Enter (manually specify a value).
Note: Set the Units for Heating Value, Alarms, and Sampler parameter on
the General tab to select volume or mass measurement in English
units (BTU/CF or BTU/Lb) or metric units (MJ/M
Identifies the basis the system uses to determine the heating value for flow
or energy calculations. Valid selections are:
Dry
Wet
As Delivered
Sets the ratio of the molar mass of the gas to the molar mass of the air. Valid
selections are Calculate (the system calculates the value) and Enter
(manually specify a value).
Note: If you select Enter, the value should represent the gas at standard
conditions and cannot be less that 0.07.
Sets the dynamic viscosity of the flowing gas. Units are Lbm/Ft-Sec or cP.
Sets the specific heat ratio of the gas (defined as the specific heat of the gas
at constant pressure divided by the specific heat of the gas at constant
volume). Accepted practice for natural gas applications is to use a value of
1.3, which was used to develop the expansion factor tables in the AGA 3
Report – Part 3.
Sets the source for the gas compositions and other properties. Valid
selections are Constant (readings are manually entered and changes are
added to the event log) or Live (readings come from a gas chromatograph or
are periodically downloaded from a host and changes are not added to the
event log).
Sets if system adjustments to the methane composition are added to the
event log. Valid selections are Enabled (adjustments are added to the event
log) or Disabled (adjustments are not added to the event log).
Requires the specific gravity of the natural gas, the
mole % of CO
, and the mole % of N2 to be entered.
2
3
or MJ/Kg).
No water vapor present in gas.
Saturated water vapor present in gas.
Note: When you select this option, the FB107
calculates the mole percentage of water based
on the algorithm from IAPWS—IF97 standards
and adjusts the other mole percentages
accordingly.
Gas may contain some water vapor.
3. Click Apply to save any changes, and proceed to Section 3.1.5 to configure the Sampler tab.
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V-Cone Flow Calculation Program User Manual
3.1.5 V-Cone Setup – Sampler Tab
Use the Sampler tab to set up the discrete output (DO) to send a pulse output to another device, such as
an odorizer, or to control a sampler for a meter run.
Note: The V-Cone selection on the General tab must be set to Enabled to view this tab.
To access this screen:
1. Select the Sampler tab on the V-Cone Setup screen. The following screen displays:
Figure 13. V-Cone Setup, Sampler tab
2. Review—and change as necessary—the values in the following fields:
Field Description
Sampler Control
Output Point
Sampler Accum
Rev. Jul-10 19
Enables sampling for the meter run. When enabled, the Output Point is set
when the previous flow matches or exceeds the value in the Sampler Accum
field.
Sets the parameter for the output to drive the sampler. Click to display the
Select TLP dialog box you use to define the parameter. It must be parameter
3 of a DO point.
Sets the quantity of fluid that must pass before the status of the Output Point
is set. Units are Cf, M
Alarms, and Sampler on the General tab.
3
, Lb, or Kg based on the Units Type for Heating Value,
V-Cone Flow Calculation Program User Manual
Field Description
Sampler Duration
Sets the duration, in seconds, for holding the status of the Output Point to
ON when the quantity of fluid passed matches or exceeds the Sampler
Accum.
3. Click Apply to save any changes, and proceed to Section 3.1.6 to configure the Calibration
Factors tab.
20 Rev. Jul-10
V-Cone Flow Calculation Program User Manual
3.1.6 V-Cone Setup – Calibration Factors Tab
Use the Calibration Factors tab to define information related to pressure calibration.
Note: The V-Cone selection on the General tab must be set to Enabled to view this tab.
To access this screen:
1. Select the Calibration Factors tab on the V-Cone Setup screen. The following screen
appears:
Figure 14. V-Cone Setup, Calibration Factors tab
2. Review—and change as necessary—the values in the following fields:
Field Description
Dead Weight
Calibration: Static
Pressure
Dead Weight
Calibration: Diff
Pressure
Calibrated
Gravitational
Acceleration
3. Click Apply to save any changes, and proceed to Section 3.1.7 to configure the Alarms tab.
Rev. Jul-10 21
Sets if the program compensates the static pressure value for the difference
between the gravitational acceleration at the location where the static
pressure was calibrated and the gravitational acceleration associated with
the dead weight calibrator.
Sets if the program compensates the differential pressure value for the
difference between the gravitational acceleration at the location where the
differential pressure was calibrated and the gravitational acceleration
associated with the dead weight calibrator.
Sets the gravitational acceleration associated with the dead weight
calibrator. The units are Ft/Sec
2
or M/Sec2.
V-Cone Flow Calculation Program User Manual
3.1.7 V-Cone Setup – Alarms Tab
Use the Alarms tab to define information related to flow alarming.
Note: The V-Cone selection on the General tab must be set to Enabled to view this tab.
To access this screen:
1. Select the Alarms tab on the V-Cone Setup screen. The following screen appears:
Figure 15. V-Cone Setup, Alarms tab
2. Review—and change as necessary—the values in the following fields:
Field Description
Time Basis for
Alarming
Low Alarm Limit
High Alarm Limit
22 Rev. Jul-10
Sets the parameter whose value is to be used for alarming. If Alarm on Daily
Flow Rate is selected, the daily volume or mass flow rate is used for
alarming. If Alarm on Hourly Flow Rate is selected, the hourly volume or
mass flow rate is used for alarming. The use of the volume or mass flow rate
is dependent on the Units Type for Heating Value, Alarms, and Sampler on
the General tab.
Sets the value at or below which the calculated flowrate must fall to generate
a low alarm. The units are MCF/Day, CF/Hour, Mlb/Day, Lb/Hour, kM
3
M
/Hour, Tonnes/Day, or Kg/Hour.
Sets the value at or above which the calculated flowrate must rise to
generate a high alarm. The units are MCF/Day, CF/Hour, Mlb/Day, Lb/Hour,
3
kM
/Day, M3/Hour, Tonnes/Day, or Kg/Hour.
3
/Day,
Field Description
Alarm Deadband
RBX Alarming
Sets a value that defines a zone above the Low Alarm limit and below the
High Alarm limit. When an alarm condition is set, the flowrate must clear the
alarm limit plus the zone defined by the deadband, before the alarm
condition clears. This deadband prevents the system from setting and
clearing the alarm continuously when the input value is oscillating around the
alarm limit. The units are MCF/Day, CF/Hour, Mlb/Day, Lb/Hour, kM
3
M
/Hour, Tonnes/Day, or Kg/Hour.
Sets the action taken for Report-by-Exception (RBX) alarm messages.
These messages are sent via communication ports that have RBX mode
enabled.
Disabled
V-Cone Flow Calculation Program User Manual
3
/Day,
RBX Alarming is turned off.
On Alarm Set
On Alarm Clear
On Alarm Set and
Clear
When the value of the parameter for alarming enters
the alarm condition, the FB107 generates an RBX
message(s).
When the value of the parameter for alarming clears
the alarm condition, the FB107 generates an RBX
message(s).
When the value of the parameter for alarming enters
or clears the alarm condition, the FB107 generates
an RBX message(s).
3. Click Apply to save any changes.
4. Click Close to close this screen, and proceed to Section 3.2 to configure the V-Cone Values
screen.
Rev. Jul-10 23
V-Cone Flow Calculation Program User Manual
3.2 V-Cone Values Screen
Use this screen to view the results and calculation factors used in V-Cone flow calculations.
To access this screen:
1. Click User Program > V-Cone Flow > Display #33, V-Cone Values from the ROCLINK
configuration tree:
2. Double-click #1, Meter #1. The V-Cone Values screen displays:
Figure 16. V-Cone Values
Note: Six fields at the top of the screen (Point number, Program Status, Meter Tag, Meter
Description, Active Calculations – Flow, and Active Calculations – Fluid Props) appear
on all tabs.
3. Review—and change as necessary—the values in the following fields:
Field Description
Point Number
Program Status
Meter Tag
24 Rev. Jul-10
Selects the meter run to view. Click to display all defined instances.
Clicking a different meter run causes the screen to display the values for that
meter run.
This read-only field shows the current state of the user program. Valid
values are: Program Not Loaded, Program Loaded – Not Started, Program
Running, Program Shutting Down, and Not Running – Library Version Error.
This read-only field shows the unique identifier for the selected meter.
Field Description
Meter Description
This read-only field shows the description of the selected meter.
V-Cone Flow Calculation Program User Manual
Active Calculations:
Flow
Active Calculations:
Fluid Props
This read-only field shows the flow calculation standard currently performing
flow calculations for the selected meter run.
This read-only field shows the properties calculation standard currently
performing properties calculations for the selected meter run.
4. Click Apply to save any changes, and proceed to Section 3.2.1 to configure the Values tab.
Rev. Jul-10 25
V-Cone Flow Calculation Program User Manual
3.2.1 V-Cone Values –Values Tab
Use the Values tab to view results of the V-Cone flow calculations.
1. Select the Values tab on the V-Cone Values screen. The following two screens displays:
Figure 17. V-Cone Values, Values tab
2. Review the values in the following fields:
Field Description
Differential Pressure
Uncorrected Volume
Static Pressure
Temperature
Current Flow Rate –
Volume
This read-only field displays the current differential pressure. The units are
InH2O or kPa.
Note: This field displays only if the meter’s input type is differential.
This read-only field displays the uncorrected volume flow rate, which is the
volumetric flow input before any density correction is applied. The units are
MCF/Day or kM3/Day.
Note: This field displays only if the meter’s input type is linear.
This read-only field displays the current static pressure in PSIG, PSIA,
kPa(g) or kPa(a).
This read-only field displays the current flowing temperature in Deg F or
Deg C.
This read-only field displays the current hourly and daily volumetric flow
rates in CF/Hour and MCF/Day or M3/hr and kM3/Day.
26 Rev. Jul-10
Field Description
Current Flow Rate –
Energy
This read-only field displays the current hourly and daily energy rates in
BTU/Hour and MMBTU/Day or MJ/Hour and GJ/Day.
V-Cone Flow Calculation Program User Manual
Current Flow Rate –
Mass
Accumulation –
Uncorrected
Accumulation – MCF
Accumulation –
MMBTU
Accumulation – Mlb
Accumulation –
Minutes
This read-only field displays the current hourly and daily mass flow rates in
Lb/Hour and Mlb/Day or Kg/Hour and Tonnes/Day.
This read-only field displays the uncorrected volume total flow in MCF or
Km3 for the current day, the previous day, the current month, the previous
month, and the accumulated total since the accumulator last reset.
Note: This field displays only if the meter’s input type is linear.
This read-only field displays the total volumetric flow in MCF or kM3 for the
current day, the previous day, the current month, the previous month, and
the accumulated total since the accumulator last reset.
This read-only field displays the total energy in MMBTU or GJoules for the
current day, the previous day, the current month, the previous month, and
the accumulated total since the accumulator last reset.
This read-only field displays the total mass flow in Mlb or Tonnes for the
current day, the previous day, the current month, the previous month, and
the accumulated total since the accumulator last reset.
This read-only field displays the flowing time in Minutes for the current day,
the previous day, the current month, the previous month, and the
accumulated total since the accumulator last reset.
3. Click Apply to save any changes and proceed to Section 3.2.2 to configure the Calculated
Factors tab.
Rev. Jul-10 27
V-Cone Flow Calculation Program User Manual
3.2.2 V-Cone Values Screen –Factors Tab
Use this tab to view the calculation factors used in V-Cone flow calculations.
Note: The V-Cone selection on the General tab must be set to Enabled to view this tab.
To access this screen:
1. Select the Factors tab on the V-Cone Values screen. The following screen displays:
Figure 18. V-Cone Values, Factors tab
2. Review the values in the following fields:
Field Description
Sample Time
Beta
Velocity of Approach
Factor
Pressure Loss
Expansion Factor
28 Rev. Jul-10
This read-only field shows, in seconds, the period between flow rate and
accumulation calculations.
Note: This value is always 1.0 Sec.
This read-only field shows the diameter ratio (β) as calculated for the V-
Cone.
This read-only field shows the velocity of approach factor (E
This read-only field shows the pressure loss (%P
differential pressure.
This read-only field shows the expansion factor (Y).
) as a percentage of
loss
).
v
Pipe Linear Velocity
V-Cone Flow Calculation Program User Manual
This read-only field shows, in Ft/Sec or M/Sec, the linear velocity (v) of the
fluid.
Reynolds Number
Correction to Base
Thermal Correction
Factor
Actual Volume Flow
Rate
Upstream Static
Pressure
Flowing Density
Base Density
V-Cone Diameter
Pipe Diameter
This read-only field displays the Reynolds number (ReD), calculated based
on the average flowing conditions during the previous IMP.
This read-only field shows the correction from the flowing to the base
conditions.
This read-only field shows the thermal correction factor (F
This read-only field shows the actual volumetric flow rate (Q
Cf/Sec or M
3
/Sec.
).
a
acfs
or Q
m3/s
) in
This read-only field displays the upstream static pressure in PSIA or kPa(a).
This read-only field displays the density at flowing conditions, calculated
based on the average flowing conditions during the previous IMP. The units
are Lb/CF or Kg/M3.
This read-only field displays the density at base conditions. The units are
Lb/CF or Kg/M3.
This read-only field displays the actual diameter of the V-Cone, calculated
based on the specified V-Cone diameter and the averaging flowing
temperature during the previous IMP. The units are inches or millimeters.
This read-only field displays the actual inside diameter of the pipe, calculate
based on the specified pipe diameter and the averaging flowing temperature
during the previous IMP. The units are inches or millimeters.
Beta
This read-only field displays the ratio of the V-Cone to pipe diameters ratio
at the average flowing temperature during the previous IMP.
3. Click Apply to save any changes.
4. Click Close to close this screen. Proceed to Section 3.3 to save your configuration.
Rev. Jul-10 29
V-Cone Flow Calculation Program User Manual
3.3 Saving the Configuration
Whenever you modify or change the configuration, it is a good practice to save the final configuration to
memory. To save the configuration:
1. Select ROC > Flags. The Flags screen displays:
Figure 19. Flags
2. Click Save Configuration. A verification message displays:
Figure 20. Save Verification
30 Rev. Jul-10
V-Cone Flow Calculation Program User Manual
3. Click Yes. When the save process completes, a confirmation message displays:
Figure 21. Confirmation
Note: Depending on the size and complexity of the user program, this process may take several
seconds. When the process ends, the Status field on the Flags screen displays Completed.
4. Click Update on the Flags screen. This completes the process of saving your new configuration.
Note: For archive purposes, you should also save this configuration to your PC’s hard drive or a
removable media (such as a diskette or a flash drive) using the File > Save
Configuration option on the ROCLINK 800 menu bar.
Rev. Jul-10 31
V-Cone Flow Calculation Program User Manual
[This page is intentionally left blank.]
32 Rev. Jul-10
V-Cone Flow Calculation Program User Manual
4 REFERENCE
This section provides the reference for the calculations and tables of parameters for the user defined
points used by the V-Cone Flow Calculation program.
Calculations Reference
Point Type 31/33: V-Cone Setup
Point Type 32/34: V-Cone Values
4.1 Calculations Reference
The calculations implemented for the V-Cone flow rates and factors are presented in the McCrometer
publication Flow Calculations for the V-Cone® and Wafer-Cone® Flowmeters, Lit. #24509-54 Rev.
3.2/02-08.
Rev. Jul-10 33
V-Cone Flow Calculation Program User Manual
4.2 Point Type 31/33: V-Cone Setup
Point type 31/33 contains the parameters for configuring and viewing the V-Cone flow calculations. There are four logicals of this point type (one
logical for each meter run).
Point Type 31/33: V-Cone Setup
Parm
#
0 Point Tag ID R/O System AC 10
1 Sample Time R/O System FLP 4 1.0 1.0 1.00
2 Beta R/O System FLP 4
3 Vel Approach R/O System FLP 4
4 Pressure Loss R/O System FLP 4
5 Expansion Factor R/O System FLP 4
6 Velocity R/O System FLP 4
7 Corr to Contract R/O System FLP 4
8 Thermal Corr R/O System FLP 4
Name Access
System
or User
Update
Data
Type
Length Range Default Version
0x20 -> 0x7E for
Each ASCII
character
Any positive
floating point
number.
Any positive
floating point
number.
Any positive
floating point
number.
Any positive
floating point
number.
Any positive
floating point
number.
Any positive
floating point
number.
Any positive
floating point
number.
“ “ 1.00
0.0 1.00
0.0 1.00
0.0 1.00
0.0 1.00 The expansion factor (Y).
0.0 1.00
0.0 1.00
0.0 1.00
Description of functionality
and meaning of values
Point tag identification. This
value is copied from point type
46, parameter 0.
Period of time, in seconds,
between flow rate and
accumulation calculations.
The diameter ratio (β) as
calculated for the V-Cone.
The velocity of approach factor
).
(E
v
The pressure loss (%P
percentage of differential
pressure.
The linear velocity (v) of the
fluid.
The correction from the flowing
to the base conditions. This
value is the ratio of the flowing
density to the base density.
The thermal correction factor
(F
).
a
loss
) as a
34 Rev. Jul-10
V-Cone Flow Calculation Program User Manual
Point Type 31/33: V-Cone Setup
Parm
#
Name Access
System
or User
Update
Data
Type
Length Range Default Version
Any positive
9 Qacfs pr Qm3/s R/O System FLP 4
floating point
0.0 1.00
number.
10 Export to SoftPt R/W User UINT8 1 0 → 32 0 1.00
11 Enable V-Cone Calc R/W User UINT8 1 0 → 1 0 1.00
Any positive
12 V-Cone Coefficient R/W User FLP 4
floating point
1 1.00
number.
Description of functionality
and meaning of values
The actual volumetric flow rate
(Q
M
acfs
3
/Sec.
or Q
) in Cf/Sec or
m3/s
Allows a host to access data
from a soft point if it cannot
access the data through other
means. Valid values are 0
(disable the access) or 1
through 32 (enable the access
and save the following values
to the designated soft point
starting with parameter 2):
0 = Disabled
1 = Calculation Period (Sec)
2 = V-Cone Beta Ratio
3 = Velocity of Approach
4 = Pressure Loss (% of
differential pressure)
5 = Expansion Factor
6 = Linear Gas Velocity (Ft/Sec
or M/Sec)
7 = Correction to Contract
Conditions
8 = Thermal Correction Factor
9 = Actual Volume Flow Rate
(Cf/Sec or M
3
/Sec)
Enabled/disabled status of the
V-Cone flow calculation for the
meter run. Valid values are:
0 = Disabled
1 = Enabled
Coefficient of discharge (Cd)
for the V-Cone as shown on the
information tag fixed to the
body of the V-Cone tube.
Rev. Jul-10 35
V-Cone Flow Calculation Program User Manual
Point Type 31/33: V-Cone Setup
Parm
#
13 End Element Type R/W User UINT8 1 0 → 1 0 1.00
14 User Correction Factor R/W User FLP 4
Name Access
System
or User
Update
Data
Type
Length Range Default Version
Any positive
floating point
number.
End element type:
0 = V-Cone
1 = Wafer-Cone
Sets a correction factor to
adjust for instances when there
is a mixture of fluids. For
example, when measuring gas
containing a known percentage
of liquid, or when measuring
liquid containing a known
percentage of sediment. These
1.0 1.21
additional components can be
adjusted out of the flow total by
setting the User Correction
Factor. A value of 1.0 indicates
that 100% of the fluid being
measured is the primary fluid. A
value of 0.90 indicates that
90% of the fluid being
measured is the primary fluid.
The default is 1.0.
Description of functionality
and meaning of values
36 Rev. Jul-10
V-Cone Flow Calculation Program User Manual
4.3 Point Type 32/34: V-Cone Values
Point type 32/34 contains only the meter point tag of the logicals of the V-Cone program. All of the calculated values are stored to the meter run
values point, point type 47 or to the V-Cone Setup user-defined point type. There are four logicals of this point type (one logical for each meter
run).
Point Type 32/34 V-Cone Values
Parm
#
0 Point Tag ID R/O System AC 10
Name Access
System
or User
Update
Data
Type
Length Range Default Version
0x20 -> 0x7E for
Each ASCII
character
“ “ 1.00
Description of functionality
Point tag identification. This
value is copied from point type
46, parameter 0.
and meaning of values
Rev. Jul-10 37
V-Cone Flow Calculation Program User Manual
If you have comments or questions regarding this manual, please direct them to your local sales representative or
contact:
Emerson Process Management
Remote Automation Solutions
Marshalltown, Iowa 50158 USA
Houston, TX 77065 USA
Pickering, North Yorkshire UK Y018 7JA
Website: www.EmersonProcess.com/Remote
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