Remote Automation Solutions Linear Meter Flow Calculation Program User manual
Mainos
Mainos
Part D301754X012
August 2015
Linear Meter Flow Calculation Program
User Manual (for FloBoss™ 107)
Remote Automation Solutions
Linear Meter Flow Calculation Program User Manual
Revision Tracking Sheet
August 2015
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
All Pages
Initial release
Revision
Aug-15
Jan-14 ii Revised Aug-15
Linear Meter Flow Calculation Program User Manual
Contents
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Linear Meter Flow Calculation Program User Manual
Chapter 1 – Introduction
1.1 Scope and Organization
This document serves as the user manual for the Linear Meter Flow
Calculation User Program (QER 08Q026), which is intended for use in a
FloBoss™ 107 (FB107). This manual describes how to download and configure this program (referred to as the “Linear Meter program” or “the program” throughout the rest of this manual). Access and configure this program using ROCLINK™ 800 Configuration Software (version 1.80 or greater) loaded on an personal computer running Windows® 2000 (with
Service Pack 2), Windows XP (with Service Pack 3), or Windows Vista™
(32-bit), or Windows 7 (32-bit and 64-bit).
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 FB107, the manual becomes a reference tool.
This manual has the following major sections:
Chapter 1 – Introduction
Chapter 2 – Installation
Chapter 3 – Configuration
Chapter 4 – Reference
This manual assumes that you are familiar with the FB107 and its configuration. For more information, refer to the following manuals:
FloBoss 107 Flow Manager Instruction Manual (part
D301232X012)
ROCLINK 800 Configuration Software User Manual (for FB107)
(part D301249X012)
1.2 Product Overview
The Linear Meter program allows a FB107 to interface with meters whose flow input is proportional to either the mass flow or the uncorrected volumetric flow. Meter types with a flow input that is proportional to the uncorrected volumetric flow include turbine, vortex, ultrasonic, and positive displacement meters. Meter types with flow input that is proportional to the mass flow include Coriolis meters. Volume and mass flow rates and totals are calculated and stored for both volumetric and mass meters. The program uses the corresponding meter run point in the
FB107’s firmware to store Linear Meter calculated values and accumulations. Additional configuration parameters are located in the program’s user-defined point types.
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Linear Meter Flow Calculation Program User Manual
For natural gas measurement with a turbine meter (per AGA Report #7
2006 edition), the Linear Meter program is NOT required, as this functionality for a volume type turbine meter for natural gas measurement is built into the FB107 firmware. However the program does provide an additional implementation of this calculation, and can be used in place of the firmware.
You enable the Linear Meter calculation for meter runs with Linear Meter hardware installed. With the calculation enabled, the FB107 bypasses the standard meter run flow calculations and performs the Linear Meter calculation instead. All standard meter run parameters, as well as the additional Linear Meter parameters, are available for assignment to
Modbus registers, PID control loops, historical archiving, and FST functions.
The program is designed to integrate with the properties calculation included in the FB107 Firmware (AGA Report #8, 1992 edition for natural gas and other related hydrocarbons), or other fluids whose properties are provided by a separate user program installed in the FB107 (such as water and steam). The only fluid properties used by the Linear Meter program are the flowing and base densities. When correcting from volume at flowing conditions to volume at base conditions, the ratio of the flowing density to the base density is used.
When a meter type of mass (Coriolis) is used, the program provides the ability to correct for the effect of pressure on the mass flowrate and accumulation. This feature is used for enhanced accuracy in high pressure
Coriolis applications. This correction can be applied inside the Coriolis device itself, or within the FB107 Linear Meter program. However it is common to apply this correction in the FB107, as it is likely to contain the live value from a pressure transmitter.
When used in conjunction with the FB107 Micro Motion Coriolis
Interface Module, the program provides integration between the raw
Coriolis data (without the use of pulses) and the FB107 meter runs. Linear
Meter program accumulations are determined by detecting the incremental increases in the Coriolis Interface Module accumulator and adding that to the totals. Conversions between volume and mass units are handled automatically when the Coriolis Interface Module is used.
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Linear Meter Flow Calculation Program User Manual
1.3 Program Requirements
You download the Linear Meter program to—and then run it from—the
Flash and RAM memory on the FloBoss 107 with firmware version 1.40
(or greater). Download and configure the program using the ROCLINK 800
Configuration software version 2.30 (or greater).
Notes:
Two versions of the program for QER 08Q026 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.
LinearMeter_5.bin loads into user program location 5 and User
Defined Points (UDP) 31 and 32. LinearMeter_6.bin loads into user program location 6 and User Defined Points (UDP) 33 and 34. Install the program version that avoids point type conflicts with currently installed programs.
This document shows the installation of LinearMeter_5.bin. The installation process and functionality is the same for all version of the
Linear Meter Flow Calculation Program.
The downloadable program is:
File Name
LinearMeter_5.bin
Target Unit/
Version
1.04
User Defined
Point (UDP)
31, 32
Flash Used
(in bytes)
13297
DRAM Used
(in bytes)
16,384
ROCKLINK 800
Version
2.30
Display
Number
32, 33
LinearMeter_6.bin 1.04 33, 34 13297 16,384 2.30 34, 35
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)
(part D301249X012).
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Linear Meter Flow Calculation Program User Manual
Chapter 2 – Installation
This section provides instructions for installing the Linear Meter program into the FB107. Read Section 1.3 of this manual for program requirements.
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.
1.
2.
3.
To download the user program:
Start and logon to ROCLINK 800.
Select ROC > Direct Connect to connect to the FloBoss unit.
Select Utilities > User Program Administrator from the ROCLINK menu bar. The User Program Administrator screen displays
(see Figure 1):
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4.
5.
Figure 1. User Program Administrator
Click Browse in the Download User Program File frame. The Select
User Program File screen displays (see Figure 2).
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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Linear Meter Flow Calculation Program User Manual
6.
Figure 2. Select User Program File
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:
6
Figure 3. User Program Administrator
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Linear Meter 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 LinearMeter_5.bin program automatically installs as program 5. For
LinearMeter_6.bin program automatically installs as program
6.
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:
9.
Figure 5. ROCLINK 800 Download Confirmation
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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Linear Meter Flow Calculation Program User Manual
8
Figure 6. User Program Administrator
10. Click Close and proceed to Chapter 3 to configure the program.
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Linear Meter Flow Calculation Program User Manual
Chapter 3 – Configuration
After you have downloaded and started the Linear Meter program, you configure the program and view calculation results using the ROCLINK
800 software. To do this, you use two program-specific screens (Linear
Meter Setup and Linear Meter Values):
Use the Linear Meter Setup screen to set the parameters for the meter run.
Use the Linear Meter Values screen to view results from the Linear
Meter calculations.
Note: Configure history points after you configure the Linear Meter program. To configure history points, refer to Table 7-2. EFM
History Points (AGA 7) in Section 10.2 of the ROCLINK800
Configuration Software User Manual (for FloBoss 107),
(part D301249X012).
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Figure 7. ROCLINK 800
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Linear Meter Flow Calculation Program User Manual
3.1 Linear Meter Setup Screen
Once you have successfully loaded the Linear Meter program into the
FloBoss, you can access the Linear Meter Setup screen and configure the meter runs.
To access this screen:
1.
2.
Click User Program > Linear Meter > Display #32, Linear Meter
Setup from the ROCLINK configuration tree:
Double-click #1, Meter #1. The Linear Meter screen displays
(see Figure 8):
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Figure 8. Linear Meter 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.
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Linear Meter Flow Calculation Program User Manual
3. Review and change as necessary the values in the following fields:
Field
Point Number
Program Status
Meter Tag
Meter Description
Flow
Fluid Props
Description
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, and
Not Running – Library Version Error.
Sets the unique identifier for the selected meter.
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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Linear Meter Flow Calculation Program User Manual
3.1.1 Linear Meter Setup Screen – General Tab
Use the General tab (which displays when you access the Linear Meter
Setup screen) to enable the Linear Meter calculation, specify the averaging technique used by the program, and define program-specific options.
12
1.
Figure 9. Linear Meter, General Tab
Review and change as necessary the values in the following fields:
Field
Linear Meter
Meter Type
Units for Heating
Value, Alarms, and
Sampler
Description
Enables or disables the Linear Meter program to perform the flow calculations for the selected meter run. Valid selections are Enabled or
Disabled.
Sets the type of meter associated with the meter run. Valid selections are Volume (volume metering device such as a turbine meter) or
Mass (Micro Motion Coriolis Mass Meter or similar mass meter).
Note: This field displays only if you select
Enabled for the Linear Meter option.
Sets the type of units used for heating value, alarms, and sampler of the meter run. Valid selections are Volume
MJ/M3, Ft 3
, (units are BTU/CF or
or M3, etc) and Mass (units are
BTU/Lb or MJ/Kg, Lb or Kg, etc).
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Linear Meter Flow Calculation Program User Manual
Field
Flow Alarming
Base Multiplier Value
(BMV) Integral
Multiplier Value (IMV)
Description
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.
Sets, in minutes, how frequently the system recalculates the fluid properties and resulting
Base Multiplier Value (BMV) (per the API measurement standard Chapter 21, Section 1).
If the flow calculation for the meter run is AGA3-
92, ISO5167-2003, or another calculation standard where the flow input is a differential pressure, this field is labeled Integral Multiplier
Value (IMV).
Averaging Technique Sets the averaging technique for determining the average static pressure and flowing temperature during each BMV/IMV for the meter run.
If the flow input is from a differential pressure meter, the average differential pressure is also determined. For further details, see API measurement standard Chapter 21,
Section 1, Appendix B. Valid selections are:
Flow
Dependant
Linear
Calculates the average static pressure and average 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 BMV/IMV, the system determines averages using all of the samples.
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Linear Meter Flow Calculation Program User Manual
Field Description
Flow
Dependant
Formulaic
Flow
Weighted
Linear
Calculates averages for the 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 BMV/IMV, averages are determined using all of the samples. At the end of the
BMV/IMV, the resulting average is raised to the reciprocal of the power to which the value is raised in the flow equation.
Note: Flow Dependent Linear and Flow Dependent
Formulaic averaging yield the same result when used with linear meters.
Calculates averages for the 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 BMV/IMV.
For samples where there is no flow, the value is not included in the average. However, if there is no flow during the BMV/IMV, averages are determined using all of the samples.
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Linear Meter Flow Calculation Program User Manual
Field Description
Flow
Weighted
Formulaic
Calculates averages for the 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
BMV/IMV. For samples where there is no flow, the value is not included in the average. However, if there is no flow during the
BMV/IMV, averages are determined using all of the samples. At the end of the
BMV/IMV, the resulting average is raised to the reciprocal of the power to which the value is raised in the flow equation. With a linear meter, flow weighted formulaic averaging yields the same result as flow weighted linear averaging.
Note: Flow Weighted Linear and
Flow Weighted Formulaic averaging yield the same result when used with linear meters.
Active Flow Alarms This display-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.
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Linear Meter Flow Calculation Program User Manual
3.1.2 Linear Meter Setup Screen – Inputs Tab
Use the Inputs tab to define the inputs used by the Linear Meter calculation.
To access this screen:
1. Select the Inputs tab on the Linear Meter Setup screen. One of the following four screens displays:
Note: This tab displays only if you select Enabled for Linear Meters on the General tab.
Figure 10(a). Linear Meter Setup, Inputs tab
(Meter Type is Volume, I/O Definition is a PI Point)
Figure 10(b). Linear Meter Setup, Inputs tab
(Meter Type is Volume, I/O Definition is an Analog Value)
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Figure 10(c). Linear Meter Setup, Inputs tab
(Meter Type is Mass, I/O Definition is a PI Point)
Figure 10(d). Linear Meter Setup, Inputs tab
(Meter Type is Mass, I/O Definition is an Analog Value)
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Linear Meter Flow Calculation Program User Manual
2. Review and change as necessary the values in the following fields:
Field
Uncorrected Volume
Mass
Static Pressure
Temperature
Accumulator
Description
Sets the parameter for the uncorrected volume flow rate from the meter. Click to display the
Select TLP dialog box you use to assign the parameter. The units for the uncorrected volume value are MCF/Day or kM 3 /Day.
If the parameter for the uncorrected volume flow rate is from a PI point, select parameter 13
(EU). If the parameter for the uncorrected volume flow rate is an analog value, select that parameter.
Note: This field displays only if the meter type is volume.
Sets the parameter for the mass flow rate from the meter. Click to display the Select TLP dialog box you use to assign the parameter. The units of the mass are Mlb/Day or Tonnes/Day.
If the parameter for the mass flow rate is from a
PI point, select parameter 13 (EU). If the parameter for the mass is an analog value, select that parameter.
Note:
This field displays only if the meter type is mass (Coriolis).
When the program is used with the
Micro Motion Coriolis Interface Module, this should be set to the module's forward mass flow rate, parameter 11
(Mass Flow Rate Fwd" of point type 65.
Sets the parameter for the static pressure. Click to display the Select TLP dialog box you use to assign the parameter. The units for the static pressure are PSIG/PSIA or kPa(g)/kPa(a).
Sets the parameter for the flowing temperature of the fluid. Click to display the Select TLP dialog box you use to assign the parameter. The units for the flowing temperature are Deg F or
Deg C.
Sets the parameter for an accumulator containing the current amount of flow measured by the meter. It is assumed that this parameter rolls over at 1,000,000.0 and is in the appropriate units. When the program is used in conjunction with the Micro Motion Coriolis
Interface Module, this should be set to the module’s ongoing mass accumulator, parameter
171 (Mass Accumulated) of point type 65. The program will automatically convert the mass to the required units in this case.
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Linear Meter Flow Calculation Program User Manual
Field
No Flow Time
Low Flow Cutoff
Static K Factor
Variable K Factors
Description
Sets the amount of time without a pulse, in seconds, before the no flow status is set.
Note: This field displays only if the I/O
Definition for the flow rate parameter is a
PI point.
Sets the low flow cutoff point. When the value of the flow input 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
MCF/Day or kM 3 /Day.
Note: This field displays only if the I/O
Definition for the flow rate parameter is an analog value.
Sets the K factor when the variable K factor is disabled or the I/O definition for the flow rate parameter is an analog value. If the flow rate parameter is an analog value, pulses are generated from the analog value and added to the total pulses stored in parameter 59 of point type 47. If the variable K factor is enabled, the static K factor is the last K factor calculated from the variable K factor table. The K factor is the number of pulses per unit of flow. The units are pulses/Cf, pulses/M3, pulses/Lb, or pulses/Kg.
Enables the use of the variable K Factor table and sets the K Factor values over a range of pulse frequencies. The units of the values of the
K Factor are pulses/Cf, pulses/M 3 , pulses/Lb, or pulses/Kg. The units of the pulse frequencies are Hz. If this field is Disabled, the Static K
Factor is used.
Note: These fields displays only if the I/O
Definition for the flow rate parameter is a
PI point.
3. Click Apply to save any changes, and proceed to Section 3.1.3 to configure the Advanced tab.
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Linear Meter Flow Calculation Program User Manual
3.1.3 Linear Meter Setup Screen – Advanced Tab
Use the Advanced tab to define additional meter run information for the
Linear Meter flow calculation.
To access this screen:
1. Select the Advanced tab on the Linear Meter Setup screen. One of the following two screens displays:
Note: This tab displays only if you select Enabled for Linear Meters on the General tab.
Figure 11(a). Linear Meter Setup, Advanced tab
(Meter Type is Volume)
Figure 11(b). Linear Meter Setup, Advanced tab
(Meter Type is Mass)
2. Review and change as necessary the values in the following fields:
Field Description
Atmospheric Pressure 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, either as PSIA or kPa(a), entered in the field in this frame). The default is Enter.
Note: If you select Enter, the value must be greater than zero.
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Linear Meter Flow Calculation Program User Manual
Field
Gravitational
Acceleration
Base Pressure
Base Temperature
Elevation
Latitude
Correction for Pressure
Effect on Mass Flow
Accuracy
Calibration Pressure
Pressure Effect
Force Recalculation
Limit Meter Events
Description
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
Ft/Sec 2
Enter (use the value, either as
or M/Sec , entered in the field in this frame). The default is Calculate.
Note: If you select Enter, the value must be greater than zero.
Sets, in PSIA or kPa(a), the flow measurement base pressure specified in the gas contract.
Sets, in degrees Fahrenheit or degrees Celsius, the flow measurement base temperature specified in the gas contract.
Sets, in feet or meters above sea level, the elevation of the metering location.
Sets, in degrees, the latitude of the metering location.
Enables or disables the correction of the mass flow input due to pressure effects.
Note: This field displays only if the meter type is mass (Coriolis).
Sets the calibration pressure of the mass flow meter for determining the pressure effect correction of the mass flow input. Units are
PSIG or kPa(g).
Note: This field displays only if the meter type is mass (Coriolis).
Sets the coefficient for the effect of pressure on the mass flow accuracy. Units are %/PSI or
%/kPa.
Note: The flow computer implementation of the correction for pressure effect on mass flow accuracy requires the Pressure
Effect to be entered as a negative number as indicated in the sensor product data sheet.
Forces the program to recalculate the flow without waiting for the next normal recalculation.
Select Set and click Apply to force the recalculation.
Note: You define normal recalculation periods using the Base Multiplier Period field
(located on the Linear Meter 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).
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Field
Pressure Tap
Description
Sets the reference of the static pressure. This field must match how the sensor or transmitter actually measures the static pressure. Valid selections are Gauge and Absolute.
3. Click Apply to save any changes, and proceed to Section 3.1.4 to configure the Fluid Properties tab.
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Linear Meter Flow Calculation Program User Manual
3.1.4 Linear Meter Setup Screen – Fluid Properties Tab
Use the Fluid Properties tab to define the fluid composition and other properties.
To access this screen:
1. Select the Fluid Properties tab on the Linear Meter Setup screen.
Note: This tab displays only if you select Enabled for Linear Meters on the General tab.
22
2.
Figure 12. Linear Meter Setup, Fluid Properties tab
Review and change as necessary the values in the following fields:
Field
Composition
FPV Method
Description
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
2
must be entered. If the FPV Method is Gross2, the mole % of CO entered.
2
and the mole % of N
2
must be
Sets the method of determining the compressibility factors for AGA8 calculations.
Valid selections are:
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Field
Heating Value
Linear Meter Flow Calculation Program User Manual
Heating Value Basis
Description
Detailed
Gross1
Gross2
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 to be entered.
2
Requires the specific gravity of the natural gas, the mole % of
CO
2
, and the mole % of N entered.
2 to be
Note: If you choose either Gross1 or Gross2, you must manually enter values for
Specific Gravity and Heating Value on this screen. Gross2 only requires a value for Heating Value if you’re calculating the gas energy flow.
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 32°F and
130°F (0°C and 54°C).
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 (use the value specified in the energy calculation).
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 3 or
MJ/Kg).
Identifies the basis the system uses to determine the heating value for flow or energy calculations. Valid selections are:
Dry No water vapor present in gas.
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Linear Meter Flow Calculation Program User Manual
Field
Specific Gravity
Viscosity
Sp Heat Ratio
Gas Quality
Log Methane Adjust
Description
Wet 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.
As Delivered Gas may contain some water vapor.
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 (use the specific value for the flow calculation).
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 (English units) or cP
(metric units).
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. If entered, the value must be greater than zero.
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).
3. Click Apply to save any changes, and proceed to Section 3.1.5 to configure the Sampler tab.
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3.1.5 Linear Meter Setup Screen – 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 gas sampler for a meter run.
To access this screen:
1. Select the Sampler tab on the Linear Meter Setup screen.
Note: This tab displays only if you select Enabled for Linear Meters on the General tab.
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2.
Figure 13. Linear Meter Setup, Sampler tab
Review and change as necessary the values in the following fields:
Field
Sampler Control
Output Point
Description
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 you use to define the parameter. It must be parameter 3 of a DO point.
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Linear Meter Flow Calculation Program User Manual
Field
Sampler Accum
Sampler Duration
Description
Sets the quantity of fluid that must pass before the status of the Output Point is set. Units are
Cf, M 3 , Lb, or Kg based on the Units Type for
Heating Value, Alarms, and Sampler on the
General tab.
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.
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3.1.6 Linear Meter Setup Screen – Calibration Factors Tab
Use the Calibration Factors tab to define information related to pressure calibration.
To access this screen:
1. Select the Calibration Factors tab on the Linear Meter Setup screen.
Note: This tab displays only if you select Enabled for Linear Meter on the General tab.
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2.
Figure 14. Linear Meter Setup, Calibration Factor tab
Review and change as necessary the values in the following fields:
Field
Dead Weight
Calibration: Static
Pressure
Calibrated Gravitational
Acceleration
Description
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 the gravitational acceleration associated with the dead weight calibrator. The units are
Ft/Sec 2 or M/Sec 2 .
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Linear Meter Flow Calculation Program User Manual
Field Description
User Correction Factor Sets a multiplier value to adjust the flow for factors not included with the Linear Meter program.
Note: Use the default value of 1.0 if no correction is desired.
3. Click Apply to save any changes, and proceed to Section 3.1.7 to configure the Alarms tab.
28 Revised Aug-15
Linear Meter Flow Calculation Program User Manual
3.1.7 Linear Meter Setup Screen – Alarms Tab
Use the Alarms tab to define information related to flow alarming.
To access this screen:
1. Select the Alarms tab on the Linear Meter Setup screen.
Note: This tab displays only if you select Enabled for Linear Meter on the General tab.
Revised Aug-15
2.
Figure 15. Linear Meter Setup, Alarms tab
Review and change as necessary the values in the following fields:
Field Description
Time Basis for Alarming 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.
29
Linear Meter Flow Calculation Program User Manual
Field
Low Alarm Limit
High Alarm Limit
Alarm Deadband
RBX Alarming
Description
Sets the value below which the calculated flow rate must fall to generate a low alarm. The units are MCF/Day, CF/Hour, Mlb/Day, Lb/Hour, kM 3 /Day, M 3 /Hour, Tonnes/Day, or Kg/Hour.
Note: Default value is 0.0 Mlb/Day if you select Mass for Units for Heating Value,
Alarms and Sampler on the General tab and 0.0 MCF/Day if you select Volume for Units for Heating Value, Alarms and
Sampler on the General tab.
Sets the value above which the calculated flow rate must rise to generate a high alarm. The units are MCF/Day, CF/Hour, Mlb/Day, Lb/Hour, kM 3 /Day, M 3 /Hour, Tonnes/Day, or Kg/Hour.
Note: Default value is 10,000 Mlb/Day if you select Mass for Units for Heating Value,
Alarms and Sampler on the General tab and 10,000 MCF/Day if you select
Volume for Units for Heating Value,
Alarms and Sampler on the General tab.
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 flow rate 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 /Day, M 3 /Hour,
Tonnes/Day, or Kg/Hour.
Note: Default value is 0.0 Mlb/Day if you select Mass for Units for Heating Value,
Alarms and Sampler on the General tab and 0.0 MCF/Day if you select Volume for Units for Heating Value, Alarms and
Sampler on the General tab.
Sets alarming options for initiating Report-by-
Exception messages. These messages are sent out through communication ports that have RBX mode enabled.
Disabled RBX Alarming is turned off.
On Alarm
Set
On Alarm
Clear
When the point enters an alarm condition, the FB107 generates a Report-by-Exception message to the host.
When the point leaves an alarm condition, the FB107 generates a Report-by-Exception message to the host.
30 Revised Aug-15
Linear Meter Flow Calculation Program User Manual
Field Description
On Alarm
Set and
Clear
In either condition, an RBX message generates to the host.
3.
4.
Click Apply to save any changes.
Click Close to close this screen, and proceed to Section 3.2 to configure the Linear Meter Values screen.
Revised Aug-15 31
Linear Meter Flow Calculation Program User Manual
3.2 Linear Meter Values Screen
Use this screen to view the results and calculation factors used in Linear
Meter calculations
To access this screen:
1.
2.
Click User Program > Linear Meter > Display #33, Linear Meter
Values from the ROCLINK configuration tree:
Double-click #1, Meter #1. The Linear Meter Values screen displays:
32
Figure 16. Linear Meter 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
Point Number
Program Status
Meter Tag
Description
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, and Not Running – Library Version Error.
This read-only field shows the unique identifier for the selected meter.
Revised Aug-15
Linear Meter Flow Calculation Program User Manual
Field
Meter Description
Active Calculations:
Flow
Active Calculations:
Fluid Props
Description
This read-only field shows 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 any changes, and proceed to Section 3.2.1 to configure the Values tab.
Revised Aug-15 33
Linear Meter Flow Calculation Program User Manual
3.2.1 Linear Meter Values –Values Tab
Use the Values tab (which displays one of the following three screens when you access the Linear Meter Values screen) to view results of the
Linear Meter calculations.
34
Figure 17(a). Linear Meter Values,Values tab
(Meter Type is Volume)
1.
Figure 17(b). Linear Meter Values, Values tab
(Meter Type is Mass)
Review the values in the following fields:
Field
Uncorrected Volume
Description
This read-only field displays 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 you select
Volume for meter type on the General tab of the Linear Meter Setup screen.
Uncompensated Mass This read-only field displays uncompensated mass flow rate, which is the mass flow input before pressure compensation is applied. The units are Mlb/Day or Tonnes/Day.
Note: This field displays only if you select Mass
(Coriolis) for meter type on the General tab of the Linear Meter Setup screen.
Static Pressure
Flowing Temperature
This read-only field displays current static pressure in PSIG, PSIA, kPa(g) or kPa(a).
This read-only field displays current flowing temperature in Deg F or Deg C.
Current Accumulator
Value
If an accumulator type meter is in use, this
read-only field displays the value of the accumulator read during the current second.
Revised Aug-15
Revised Aug-15
Linear Meter Flow Calculation Program User Manual
Field
Previous Accumulator
Value
Current Flow Rate –
Volume
Current Flow Rate –
Energy
Description
If an accumulator type meter is in use, this
read-only field displays the value of the accumulator read during the previous second.
This read-only field displays current hourly and daily flow rates in CF/Hour and MCF/Day or
M3/hr and kM3/Day.
This read-only field displays current hourly and daily energy rates in BTU/Hour and
MMBTU/Day or MJ/Hour and GJ/Day.
Current Flow Rate –
Mass
Accumulation –
Uncorrected
Accumulation – MCF
This read-only field displays current hourly and daily mass rates in Lb/Hour and Mlb/Day or
Kg/Hour and Tonnes/Day.
This read-only field displays 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.
This read-only field displays 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.
Accumulation –MMBTU This read-only field displays 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.
Accumulation – Mlb This read-only field displays total mass 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.
Accumulation – Minutes This read-only field displays 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.
2. Click Apply to save any changes and proceed to Section 3.2.2 to configure the Calculated Factors tab.
35
Linear Meter Flow Calculation Program User Manual
3.2.2 Linear Meter Values Screen – Calculated Factors Tab
Use this tab to view calculation factors used in Linear Meter calculations.
To access this screen:
1. Select the Factors tab on the Linear Meter Values screen. One of the following two screens displays:
Note: This tab displays only if you select Enabled for the Linear
Meter on the General tab of the Linear Meter Setup screen.
36
Figure 18(a). Linear Meter Values,Values tab
(Meter Type is Volume)
Figure 18(b). Linear Meter Values, Values tab
(Meter Type is Mass)
2. Review the values in the following fields:
Field
Uncorrected Volume
Description
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 you select
Volume for meter type on the General tab of the Linear Meter Setup screen.
Uncompensated Mass This read-only field displays the uncompensated mass flow rate, which is the mass flow input before the correction for pressure effect is applied. The units are Mlb/Day or Tonnes/Day.
Note: This field displays only if you select
Mass (Coriolis) for meter type on the
General tab of the Linear Meter Setup screen.
Flowing Density This read-only field shows the calculated density at flowing conditions in Lb/CF or Kg/M3.
Revised Aug-15
Linear Meter Flow Calculation Program User Manual
Field
Base Density
BMV
Pressure Effect
Correction Factor
Description
This read-only field shows the calculated density at base conditions in Lb/CF or Kg/M3.
This read-only field displays the base multiplier value (BMV), which is the factor for multiplying by the uncorrected volume flow rate to determine the corrected volume flow rate.
Note: This field displays only if you select
Volume for meter type on the General tab of the Linear Meter Setup screen.
This read-only field displays the pressure effect correction factor, which is calculated from the pressure effect coefficient and the difference between the flowing and calibration pressures.
Note: This field displays only if you select
Mass (Coriolis) for meter type on the
General tab of the Linear Meter Setup
3.
4.
Click Apply to save any changes.
Click Close to close this screen. Proceed to Section 3.3 to save your configuration.
Revised Aug-15 37
Linear Meter 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:
38
2.
Figure 19. Flags
Click Save Configuration. A verification message displays:
Figure 20. Save Verification
Revised Aug-15
Linear Meter 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 minutes. When the process ends, the
Status field on the Flags screen displays Completed.
Revised Aug-15
Figure 22. Flags, Status - 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 flash drive) using the File > Save Configuration option on the
ROCLINK 800 menu bar.
39
Linear Meter Flow Calculation Program User Manual
Chapter 4 – Reference
This section provides calculation details and tables of information on the user defined points used by the Linear Meter Flow Calculation program.
Calculation Details
Point Type 31: Linear Meter Setup
Point Type 32: Linear Meter Values
4.1 Calculation Details
The Linear Meter flow calculations are based on equations presented in the following flow calculation standards.
Measurement of Gas by Turbine Meters, Transmission
Measurement Committee Report No. 7, American Gas Association
(AGA), Second Revision, April, 1996.
Measurement of Natural Gas by Coriolis Meter, AGA Report No.
11, API MPMS 14.9, Transmission Measurement Committee,,
American Gas Association (AGA), 2003.
Each of these flow calculation standards can be implemented using the
Linear Meter program. However, AGA7 is already available with the
FB107 Application Firmware, so it is recommended to use that implementation for meter runs requiring AGA7.
If you specify Volume as meter type, the flow calculations are:
Q b
= Q f
* ρ f
/ ρ b q m
= Q b
* ρ b where:
Q
Q
Units are MCF or kM3. q
ρ b
ρ f f b
= Volumetric flow at base conditions. Units are MCF or kM3.
= Volumetric flow at flowing conditions (uncorrected flow). m
= Mass flow. Units are Mlb or Tonnes.
= Density at base conditions. Units are Lb/CF or Kg/M 3 .
= Density at flowing conditions. Units are Lb/CF or Kg/M 3 .
40 Revised Aug-15
Linear Meter Flow Calculation Program User Manual
If you specify Mass (Coriolis) as meter type, the flow calculations are: q m
= q m,u
* F
P
Q b
= q m
/ ρ b where:
F
Q q
P b m
= Correction for pressure effect on the mass flow accuracy.
= Volumetric flow at base conditions. Units are MCF or kM3. q
= Mass flow. Units are Mlb or Tonnes. m,u
= Mass flow before correction for pressure effect. Units are
Mlb or Tonnes.
ρ b
= Density at base conditions. Units are Lb/CF or Kg/M 3 . where:
If correction for pressure effect is enabled:
F
P
= 1.0 / (1.0 + (K
P
/ 100.0) * (P f
– P c
))
K
P
P f c
P
= Pressure effect coefficient. Units are %/PSIG or %/kPa(g).
= Calibration pressure. Units are PSIG or kPa(g)
= Flowing pressure. Units are PSIG or kPa(g)
If correction for pressure effect is disabled:
F
P
= 1.0
With both volume and mass meters, the program updates flow inputs once a second and calculates approximations of the flow rates and totals. The program revises approximated flow totals at the specified base multiplier period (BMP) using the total of flow input, base density, and average flowing density (recalculated using the average pressure and temperature during the BMP).
Revised Aug-15 41
Linear Meter Flow Calculation Program User Manual
4.2 Point Type 31: Linear Meter Setup
Point type 31 contains the parameters for configuring the Linear Meter program. There are four logicals of this point type (one logical for each meter run).
Point Type 31: Linear Meter Setup
Parm
#
Name
0 Point Tag ID
1 Enable Linear Meter
Access Data Type Length
R/O
R/W
AC
UINT8
10
1
Range
0x20 -> 0x7E for
Each ASCII character
0 -> 1
“ “
Default Description of functionality and meaning of values
Point tag identification. This value is copied from point type 46, parameter 0.
0
2
3
Meter Type
Press Effect Enable
R/W
R/W
UINT8
UINT8
1
1
0 -> 1
0 -> 1
0
0
Enable/disable status of the linear meter flow calculation for the meter run. Valid values are:
0 = Disable
1 = Enable
Type of meter. Valid values are:
0 = Volume – The flow input is proportional to the uncorrected volumetric flow.
1 = Mass (Coriolis) – The flow input is proportional to the mass flow.
If the meter type is volume:
Not used.
If the meter type is mass (Coriolis):
Enable/disable the correction for the pressure effect on the mass flow accuracy. Valid values are:
0 = Disable
1 = Enable
Revised Aug-15 42
Point Type 31: Linear Meter Setup
Parm
#
Name
4 Calibration Pressure
5
6
Press Effect Coeff
Accumulator TLP
Access Data Type Length
R/W FL 4
R/W
R/W
FL
TLP
4
3
Range
Any floating point number
Any floating point number
Any valid TLP
Linear Meter Flow Calculation Program User Manual
Default Description of functionality and meaning of values
0.0 If the meter type is volume:
Not used.
If the meter type is mass:
Calibration pressure of the mass meter from which the correction for the pressure effect on the mass flow accuracy is determined. Units are PSIG or kPa(g).
0.0
0,0,0
If the meter type is volume:
Not used.
If the meter type is mass:
Pressure effect coefficient for the mass meter. Units are %/PSIG or %/kPa(g).
The correction for pressure effect on mass flow accuracy requires the pressure effect coefficient to be a negative number as indicated in the sensor product data sheet.
Accumulator Input for this program.
Configuring this parameter triggers the
Linear Meter program to read the parameter specified by Accumulator TLP and use its value, along with the specified rate, to calculate accumulated totals.
NOTE: The Linear Meter Program assumes that the accumulator is in the correct units for the meter run in which it is used.
Revised Aug-15 43
Linear Meter Flow Calculation Program User Manual
4.3 Point Type 32: Linear Meter Values
Point type 32 contains the calculated parameters for the Linear Meter program. There are four logicals of this point type (one logical for each meter run).
Point Type 31: Linear Meter Setup
Parm
#
Name
0 Point Tag ID
1 Press Effect Factor
Access Data Type
R/O
R/O
AC
FL
Length
10
4
Range
0x20 -> 0x7E for
Each ASCII character
Any floating point number
Default
“ “
1.0
Description of functionality and meaning of values
Point tag identification. This value is copied from point type 46, parameter 0.
2
3
4
Current Accumulator Value
Previous Accumulator Value
Value From Accumulator
R/O
R/O
R/O
FL
FL
FL
4
4
4
Any floating point number
Any floating point number
Any floating point number
0.0
0.0
0.0
If the meter type is volume:
Not used.
If the meter type is mass (Coriolis):
Pressure effect correction factor, which is calculated from the pressure effect coefficient and the difference between the flowing and calibration pressures.
The value of the accumulator read during the current second.
The value of the accumulator read during the previous second.
The current value of the accumulator.
NOTE: This parameter is not part of the
Linear Meter Program’s calculations, and is only used to display the current value of the accumulator on the Meter Inputs Tab. When used with the Micro Motion Coriolis
Interface Module, the units will be automatically converted as required
44 Revised Aug-15
Linear Meter Flow Calculation Program User Manual
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