Page is loading ...
Flow Computer Division
Pure Gas and Air Properties with Split Accumulations
Calculation Program
(For FB100-Series Flow Managers)
User Manual
(QER 05Q042)
D301836X012
Form A6202
June 2006
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 ii
Revision Tracking Sheet
June 2006
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
Initial release Jun-06
FloBoss and ROCLINK are trademarks of one of the Emerson Process Management companies. The Emerson logo is a trademark and
service mark of Emerson Electric Co. All other marks are the property of their respective owners.
Fisher Controls International, LLC. 2006. All rights reserved. Printed in the U.S.A.
www.EmersonProcess.com/flow
While this information is presented in good faith and believed to be accurate, Fisher Controls does not guarantee satisfactory results from
reliance upon such information. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding the
performance, merchantability, fitness or any other matter with respect to the products, nor as a recommendation to use any product or process
in conflict with any patent. Fisher Controls reserves the right, without notice, to alter or improve the designs or specifications of the products
described herein.
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 iii
Table of Contents
Page
1 INTRODUCTION ................................................................................................................................. 1
1.1 Scope and Organization ........................................................................................................... 1
1.2 Product Overview .................................................................................................................... 1
1.2.1 Pure Gas Properties Calculations .............................................................................. 1
1.2.2 Air Properties Calculations ....................................................................................... 2
1.2.3 Split Accumulations .................................................................................................. 2
1.3 Program Requirements ............................................................................................................. 2
2 INSTALLATION ................................................................................................................................... 3
2.1 Downloading the Program ....................................................................................................... 3
3 CONFIGURATION ............................................................................................................................... 7
3.1 Device Information Screen ...................................................................................................... 7
3.2 Pure Gas Properties Screen ...................................................................................................... 8
3.3 Saving the Configuration ....................................................................................................... 15
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 1
1 INTRODUCTION
1.1 Scope and Organization
This document serves as the user manual for the Pure Gas and Air Properties with Split Accumulations
Calculation user program (QER 05Q042), which is intended for use in a FloBoss™ 100-Series unit. This
manual describes how to download and configure this program (referred to as the “Pure Gas/Air
Properties 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
98, ME, NT 4.0 (with Service Pack 6), 2000 (with Service Pack 2), or XP.
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 100, the manual becomes a
reference tool.
This manual has the following major sections:
Section 1 – Introduction
Section 2 – Installation
Section 3 – Configuration
This manual assumes that you are familiar with the FloBoss 100-Series units and their configuration. For
more information, refer to the following manuals:
FloBoss 103 and 104 Flow Managers Instruction Manual (Form A6114).
ROCLINK 800 Configuration Software User Manual (Form A6121).
1.2 Product Overview
The Pure Air/Gas Properties program enables a FloBoss 100 to calculate density and related properties
for a range of pure gases and moist air. The program approximates values for a gas mixture by summing
the mole fractions for each gas component. It calculates the density of pure gas at flowing conditions
using a Third Order Virial equation. It calculates the density of air using the BIPM Equation for the
Determination of the Density of Moist Air (1981/91), by R. S. Davis.
With the program installed, the FloBoss 100 reads flow inputs (differential pressure, temperature, and
static pressure) and calculates flowing gas properties once every second. It also—at a scan period you
define—performs the pure gas properties calculations (including compressibility values, gas constants,
and base density values), accumulates volumes, and integrates those volumes into the historical archive.
The program performs the instantaneous flow calculation once a second. In addition, the program
performs split accumulations for up to five separate categories. You configure the program using the
standard FloBoss meter run screen and a program-specific Pure Gas Properties screen (see Figure 11).
1.2.1 Pure Gas Properties Calculations
The program calculates pure gas compressibility and density at flowing conditions using a Third Order
Virial Equation with derived constants to calculate the virial coefficients. The compressibility and
density at reference conditions are calculated either to the ISO6976 Standard, 1996 edition, or by using
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 2
the Virial Equation. Calculations for relative density and heating values are performed to the ISO6976
Standard, 1996 edition. Viscosity is corrected to flowing conditions from NIST values at 15°C and
101.325 kPa using the VDI/VDE 2040 Part 2 1987 equations. Isentropic exponent values are calculated
from NIST Cp/Cv, at 15°C and 101.325 kPa.
The supported gases are:
Hydrogen
Helium
Nitrogen
Oxygen
Argon
Carbon Monoxide
Carbon Dioxide
Methane
The gases may not be 100% pure and can be entered as a mixture. The density of the mixture is
calculated by calculating the individual densities for each gas and summing the mol% proportion of
each.
1.2.2 Air Properties Calculations
The air density calculations are based on the BIPM Equation for the Determination of the Density of
Moist Air (1981/91) by R. S. Davis. The program calculates all other properties as for pure gases.
1.2.3 Split Accumulations
A Split Accumulator, with configured category limits, allows differential billing to be performed on a
flow or volume proportional basis.
1.3 Program Requirements
You download the Pure Air/Gas Properties program to—and then run it from—the Flash and RAM
memory on the FloBoss 100. The Pure Air/Gas Properties program is compatible with firmware version
2.12 (or greater) of the FloBoss 100. Download and configure the program using the ROCLINK 800
Configuration software (version 1.50 or greater).
The downloadable program is:
File Name Unit Task Code Space Data Space UDP
FB103_PureGasSplitAccum.BIN FloBoss 100 User 2 7B0000–7BFFFF 470000–470FFF 30
Note: You must connect a PC to the FloBoss unit’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 (Form A6121).
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 3
2 INSTALLATION
This section provides instructions for installing the Pure Gas/Air Properties program into FloBoss
memory. 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.
To download the user program using ROCLINK 800 software:
1. Connect the FloBoss to your computer using the Local Operator Interface (LOI) port.
2. Start and logon to ROCLINK 800.
3. Select ROC > Direct Connect to connect to the FloBoss unit.
4. Select Utilities > User Program Administrator from the ROCLINK menu bar. The User
Program Administrator screen displays (see Figure 2):
Figure 2. User Program Administrator Screen
5. Click Browse in the Download User Program File frame. The Select User Program File screen
displays (see Figure 3).
6. 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 3 shows, the screen
lists all valid user program files with the .BIN extension:
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 4
Figure 3. Select User Program File
7. Click Open to select the program file. The User Program Administrator screen displays. As
shown in Figure 4, note that the Download User Program File frame identifies the selected
program and that the Download & Start button is active:
Figure 4. User Program Administrator Screen
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 5
8. Click Download & Start to begin loading the selected programs. The following message
displays:
Figure 5. Confirm Download
9. 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 6. ROCLINK 800 Download Confirmation
10. Click OK. The User Program Administrator screen displays (see Figure 7). Note that:
The User Programs Installed in Device frame identifies the loaded program.
The Status field in that frame shows the device status as “On” (indicating a successful Warm
Start).
The Memory Usage frame indicates the memory the program uses.
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 6
Figure 7. User Program Administrator Screen
11. Click Close. The ROCLINK 800 screen displays and the download is complete.
Figure 8. ROCLINK 800 Screen
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 7
3 CONFIGURATION
After you have loaded the Pure Gas/Air Properties program, you configure it using the ROCLINK 800
software. To do this, you use two standard ROCLINK 800 meter setup screens (History Setup and
Device Information) and one program-specific screen (Pure Gas Properties):
Use the Device Information screen to verify that the units value is set to your organization’s
standard.
Use the Pure Gas Properties screen to set the program-specific parameters and display calculated
values.
3.1 Device Information Screen
Use this screen to check the default units.
1. From the ROCLINK 800 screen, select ROC > Information. The Device Information screen
displays.
Figure 9. Device Information
2. Review—and change as necessary—the value in the following field:
Field Description
Units
Sets the units the program uses. Valid values are US or Metric.
Note: Changing this value may not automatically refresh other displayed
values. Verify that what you enter is appropriate for the engineering units you
select.
3. Click Apply if you changed the value in this field.
4. Click OK to return to the ROCLINK 800 screen.
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 8
3.2 Pure Gas Properties Screen
The Pure Gas screen enables you to enter program-specific calculation parameters and displays
calculated values.
To access this screen:
1. Click User Program > Pure Gas Split Accum > Display #31, PureGas Split Accumulation
from the ROCLINK configuration tree:
Figure 10. ROCLINK 800
2. Double-click #1. The Pure Gas / Split Accumulations screen displays (see Figure 11), with the
Pure Gas Properties tab (fields shown) and Split Accumulations tab:
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 9
Figure 11. Pure Gas Properties
3. Select a Point Number of the EFM flow in this device for which you want to configure
properties. Since the FloBoss 100-Series device permits only one meter run, “1” is the only valid
value.
4. For the Pure Gas Properties tab, complete the following screen fields based on your
organization’s requirements.
Field Description
Calc Enable
Enables the pure gas properties calculation for the meter run. Valid values are
1 (enable the pure gas properties calculations) or 0 (use standard AGA8
calculations for the meter run). 1 is the default value.
Force Recalc
Executes the periodic calculations (which is necessary after you change the
reference conditions or select a new gas composition). Valid values are 1
(immediately execute the calculation) or 0 (do not run the calculations). Default
value is 0.
Softpoint Enable
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 16
(enable the access and indicate the softpoint to use).
Note: If you enable softpoint access, the program uses the following data
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 10
Field Description
points for pure gas:
1
Base Pressure (kPa)
2
Base Temperature (°C)
3
Flowing Pressure (kPa)
4
Flowing Temperature (°C)
5
Base Density (kg/m
3
)
6
Universal Gas Constant - R
7
Gas Component Molar Mass
8
Virial Coefficient B x 1e05
9
Virial Coefficient C x 1e10
10
Virial Coefficient D x 1e14
11
Virial Coefficient E x 1e17
12
Pressure/R*Temperature (P/RT)
13
Density of last component (kg/m
3
)
14
Flowing Density (kg/m
3
)
15
Viscosity at Standard Conditions
16
Sutherland Constant
17
Numerator for viscosity mixture calculation
18
Denominator for viscosity mixture calculation
19
Calculated Viscosity
The program uses the following data points for air:
1
Base Pressure (kPa)
2
Base Temperature (°C)
3
Flowing Pressure (kPa)
4
Flowing Temperature (kPa)
5
Base Density
6
Enhancement Factor f
7
Saturation Vapor Pressure of Water
8
Relative Humidity of Air
9
Water Vapor Mole Fraction
10
Compressibility Factor of Moist Air
11
Flowing Density (kg/m
3
)
12
Not Used
13
Not Used
14
Not Used
15
Viscosity at Standard Conditions
16
Sutherland Constant
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 11
Field Description
17
Numerator for viscosity mixture calculation
18
Denominator for viscosity mixture calculation
19
Calculated Viscosity
ZbCalc(0=Virl,1=ISO)
Defines the calculation method for base compressibility and base density.
Valid values are 0 (use the values produced by the Virial equation for pure
gases or the BIPM equation for air) or 1 (use the values for the ISO6976
Standard). Default value is 0.
ISO Ref Cond 15/15
Sets the ISO6976 reference conditions for combustion and base metering
temperatures (15°C/15°C) at a base pressure of 101.325 kPa. Valid values are
1 (use this combustion/base metering combination for the calculation) or 0 (do
not use this combination).
Note: You can define only one (1) ISO Ref Cond field. You must also enter 1
in the Force Recalc field to activate this selection. This value updates the Base
Temperature shown on the Meter Setup Advanced screen.
ISO Ref Cond 00/00
Sets the ISO6976 reference conditions for combustion and base metering
temperatures (00°C/00°C) at a base pressure of 101.325 kPa. Valid values are
1 (use this combustion/base metering combination for the calculation) or 0 (do
not use this combination).
Note: You can define only one (1) ISO Ref Cond field. You must also enter 1
in the Force Recalc field to activate this selection. This value updates the Base
Temperature shown on the Meter Setup Advanced screen.
ISO Ref Cond 15/00
Sets the ISO6976 reference conditions for combustion and base metering
temperatures (15°C/00°C) at a base pressure of 101.325 kPa. Valid values are
1 (use this combustion/base metering combination for the calculation) or 0 (do
not use this combination).
Note: You can define only one (1) ISO Ref Cond field. You must also enter 1
in the Force Recalc field to activate this selection. This value updates the Base
Temperature shown on the Meter Setup Advanced screen.
ISO Ref Cond 25/00
Sets the ISO6976 reference conditions for combustion and base metering
temperatures (25°C/00°C) at a base pressure of 101.325 kPa. Valid values are
1 (use this combustion/base metering combination for the calculation) or 0 (do
not use this combination).
Note: You can define only one (1) ISO Ref Cond field. You must also enter 1
in the Force Recalc field to activate this selection. This value updates the Base
Temperature shown on the Meter Setup Advanced screen.
ISO Ref Cond 20/20
Sets the ISO6976 reference conditions for combustion and base metering
temperatures (20°C/20°C) at a base pressure of 101.325 kPa. Valid values are
1 (use this combustion/base metering combination for the calculation) or 0 (do
not use this combination).
Note: You can define only one (1) ISO Ref Cond field. You must also enter 1
in the Force Recalc field to activate this selection. This value updates the Base
Temperature shown on the Meter Setup Advanced screen.
ISO Ref Cond 25/20
Identifies the ISO6976 reference conditions for combustion and base metering
temperatures (25°C/20°C) at a base pressure of 101.325 kPa. Valid values are
1 (use this combustion/base metering combination for the calculation) or 0 (do
not use this combination).
Note: You can define only one (1) ISO Ref Cond field. You must also enter 1
in the Force Recalc field to activate this selection. This value updates the Base
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 12
Field Description
Temperature shown on the Meter Setup Advanced screen.
Flowing Press kPa
This read-only field shows the flowing pressure in kPa.
Flowing Temp ‘C
This read-only field shows the flowing temperature in Degrees Centigrade.
GasCalcAir(1=Air)
Sets the properties calculations. Valid values are 0 (select pure gas
calculations) or 1 (select air calculations).
Note: You must also enter 1 in the Force Recalc field to activate this selection.
Rel Humidity Air%
Sets the percentage relative humidity of air, which the program uses to
calculate the density of moist air.
CO2 Content Air%
Sets the mole percentage of carbon dioxide in air, which the program uses to
calculate the density of moist air. The default value is 0.04%, the value
assumed by BIPM.
Base Viscosity
Sets the value for the viscosity of pure gas at base conditions, which the
program uses to calculate viscosity at flowing conditions. If you set this value
to zero (0), the viscosity calculation uses an internal value (NIST) set at 15°C,
101.325 kPa.
Note: The value you enter should correspond to the temperature and pressure
you selected for the ISO Ref Cond field.
Sutherland Constant
Sets a value the program uses to calculate viscosity at flowing conditions. If
you set this value to zero (0), the viscosity calculation uses an internal value
from VDI/VDE 2040 Part 2 Table 4.
Gas Components
Identifies (for each indicated gas) the mole % components of the gas mixture
the pure gas calculation uses.
Note: The Pure Gas/Air Properties program does not use or update the values
shown on the Gas Quality tab on the Meter Setup screen (Meter > Setup).
ISO6976 Zb
This read-only field shows the compressibility of the pure gas calculated to the
ISO6976 Standard at the selected ISO reference conditions.
ISO Real Density
This read-only field shows the real density calculated to the ISO6976
Standard at the selected ISO reference conditions.
ISO Real Rel Dens
This read-only field shows the real relative density calculated to the ISO6976
Standard.
ISO Superior CV
This read-only field shows the real heating value calculated to the ISO6976
Standard.
ISO Molar Mass
This read-only field shows the molar mass of the pure gas calculated to the
ISO6976 Standard.
In Use Zb
This read-only field shows the gas compressibility at the base temperature
and base pressure, calculated from the base density.
In Use Zf
This read-only field shows the gas compressibility at the flowing temperature
and flowing pressure, calculated from the flowing density.
Base Density
This read-only field shows the gas density at base conditions calculated
according to the option set in the ZbCalc field.
Flowing Density
This read-only field shows the gas density at flowing conditions calculated
either using the virial equation for pure gas or the BIPM equation for moist air.
Relative Density
This read-only field shows the relative density calculated from the base
density and density of air from the ISO6976 Standard.
Isentropic Exponent
This read-only field shows the specific heat ratio (which is the isentropic
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 13
Field Description
exponent) calculated from internal NIST values (Cp/Cv) at 15°C and 101.325
kPa.
Flowing Viscosity
This read-only field shows the dynamic viscosity calculated either using the
VDI/VDE 2040 Part 2 equation based on internal NIST values 15°C and
101.325 kPa or on the value entered in the Base Viscosity field.
5. Click on the Split Accumulations tab to view the screen shown in Figure 12. For this tab,
complete the screen fields based on your organization’s requirements. Following the figure is a
description of each field on this tab.
Figure 12. Split Accumulations Tab
NOTE: If you manually edit the fields (such as Current Volume and EOM Volume field values) in
this display, the program uses the new values in calculations.
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 14
Category 1:
High Limit I/O Definition – Select the source (point type, logical, parameter) of the Category limit
value. Undefined indicates a manually entered value (see the Limit Value field). The limit value
should be in flowing units per hour.
Limit Value – This field shows the Category limit value in units per hour. Category 1 Low Limit is
normally 0 (the default).
Flow Minutes – Flow minutes during which the instantaneous flow rate was in this Category. The
Flow Minute value rolls over at the rollover limit of 1,000,000 (not editable). The Flow Minute
value for the scan period is assigned to the highest category reached by the flow during the scan
period.
Current Volume – Accumulated volume at contract pressure and temperature in this Category in
flowing units. The volume value rolls over at the specified Rollover Limit.
Rollover Counter – Increments by 1 each time a rollover in the Current Volume occurs.
EOM Volume – Value of Current Volume for a given Category at the end of the previous month in
flowing units.
EOM Rollover Counter – Indicates the value of the Rollover Counter at the end of the previous
month.
Category 2 – same as Category 1 above with the following notes:
Limit value – The Category 2 low limit is the Category 1 High Limit.
Category 3 – same as Category 1 above with the following notes:
Limit value – Category 3 low limit is Category 2 High Limit.
Category 4 – same as Category 1 above with the following notes:
Limit value – Category 4 low limit is Category 3 High Limit.
Category 5 – same as Category 1 above with the following notes:
High Limit I/O Definition – Not available, since there is no accumulator upper limit for Category 5.
Limit Value – Not available, since there is no accumulator upper limit for Category 5. Category 5
low limit is Category 4 High Limit.
Rollover Limit – The Value at which the Current Volume for a Category rolls over (default =
1,000,000).
Totals
Flow Minutes – Total of the Flow Minutes for categories 1 through 5.
Current Volume – Total of the Current Volumes for categories 1 through 5.
Rollover Counter – Total of the Rollover Counter values for categories 1 through 5.
EOM Volume – Total of End of Month Volumes for categories 1 through 5.
EOM Rollover Counter – Total of End-of-month Rollover Counter values for categories 1
through 5.
Instantaneous Hourly Flow Rate – Instantaneous Flow Rate at contract (base) conditions as
controlled/calculated by the following:
Input Rate – Select the source (point type, logical, parameter) of the instantaneous hourly flow rate.
“Undefined” means that the manually entered value in the Value field will be used. Specify the units
(per hour) for the value being used.
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 15
Multiplier – This field allows the user to define the source (point type, logical, parameter) of
Instantaneous Flow Multiplier value. “Undefined” means that the manually entered value in the
Value field will be used as the multiplier. This value is taken times the Input Rate specified for
instantaneous flow and can be used to change the engineering units value of the accumulated
volumes.
Corrected Hourly Flow Rate – This field shows value of the corrected rate, which is the Input Rate
times the Multiplier specified above. This is the value used to accumulate the Current Volumes
shown in the top part of the Split Accumulation screen.
6. Click Apply to save any changes you have made to this screen.
7. Click the Close button to close this screen.
8. This completes the process of configuring the Pure Gas/Air Properties with Split Accumulations
program. Proceed to Section 3.3 to save your configuration.
3.3 Saving the Configuration
Whenever you modify or change the configuration, save the final configuration to memory. To save the
configuration:
1. Select ROC > Flags. The Flags screen displays:
Figure 13. Flags
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 16
2. Click Save Configuration. A verification message displays:
Figure 14. Save Verification
3. Click Yes. When the save process completes, a confirmation message displays:
Figure 15. 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.
4. Click Update on the Flags screen. This completes the process of saving your new configuration.
Pure Gas Properties with Split Accumulations Program User Manual
Issued Jun-06 17
If you have comments or questions regarding this manual, please direct them to your local sales representative or
contact:
Emerson Process Management
Flow Computer Division
Marshalltown, Iowa 50158 USA
Houston, TX 77065 USA
Pickering, North Yorkshire UK Y018 7JA
Website: www.EmersonProcess.com/flow
/
