GOST Flow Calculation Program

Transcription

1 Remote Automation Solutions GOST Flow Calculation Program (For the FloBoss 103) User Manual (QER 05Q039) D301834X012 Form A6195 March 2009

2 Revision Tracking Sheet March 2009 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 All pages All pages All pages Revision Mar-09 Oct-08 Jul-06 Sep-05 NOTICE Remote Automation Solutions ( RAS ), division of Emerson Process Management shall not be liable for technical or editorial errors in this manual or omissions from this manual. RAS MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO THIS MANUAL AND, IN NO EVENT SHALL RAS BE LIABLE FOR ANY INCIDENTAL, PUNITIVE, SPECIAL OR CONSEQUENTIAL DAMAGES INCLUDING, BUT NOT LIMITED TO, LOSS OF PRODUCTION, LOSS OF PROFITS, LOSS OF REVENUE OR USE AND COSTS INCURRED INCLUDING WITHOUT LIMITATION FOR CAPITAL, FUEL AND POWER, AND CLAIMS OF THIRD PARTIES. 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 Management. FloBoss, ROCLINK, Bristol, Bristol Babcock, ControlWave, TeleFlow and Helicoid are trademarks of RAS. AMS, PlantWeb and the PlantWeb logo are marks of Emerson Electric Co. The Emerson logo is a trademark and service mark of the Emerson Electric Co. All other trademarks are property of their respective owners. The contents of this publication are presented for informational purposes only. While every effort has been made to ensure informational accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. RAS reserves the right to modify or improve the designs or specifications of such products at any time without notice. All sales are governed by RAS terms and conditions which are available upon request. RAS does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any RAS product remains solely with the purchaser and end-user Remote Automation Solutions, division of Emerson Process Management. All rights reserved. ii Rev. Mar-09

3 Contents Page 1 INTRODUCTION Scope and Organization Product Overview Program Requirements INSTALLATION Downloading the GOST Flow Program CONFIGURATION Device Information Screen Meter Setup Screen Meter Setup Screen General Tab Meter Setup Screen Inputs Tab Meter Setup Screen Advanced Tab History Setup Screen GOST Flow Data Screen GOST Flow Data Screen Setup Tab GOST Flow Data Screen Calculated Results Tab GOST Flows and Accums Screen Saving the Configuration REFERENCE GOST Flow Task Alarm List GOST Flow Task Limits of Use Point Type 22: GOST Flow User Data Point Type 23: Mass Calculations Rev. Mar-09 iii

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5 1 INTRODUCTION 1.1 Scope and Organization This document serves as the user manual for the GOST Flow Calculation Program (QER 05Q039), which is intended for use in a FloBoss 103. This manual describes how to download and configure this program (referred to as the GOST Flow program or the program throughout the rest of this manual). You access and configure this program using ROCLINK 800 Configuration Software (version 1.83 or greater) loaded on an IBM -compatible personal computer (PC) running Windows 2000 (with Service Pack 2), Windows XP, or Windows 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 103, 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 FloBoss 103 and 104 Flow Managers Instruction Manual (Form A6114) or the ROCLINK 800 Configuration Software User Manual (Form A6121). 1.2 Product Overview The GOST Flow Calculation program allows a FloBoss 103 to calculate volumetric and mass flow rates, integrate volumes and masses, and create and store historical values using the GOST standard or GOST standard. This program replaces the AGA3 flow calculation. It uses AGA structures where possible and provides two program-specific screens for entering and viewing additional programspecific parameters. With the program installed, the FloBoss 103 reads flow inputs (differential pressure, temperature, and static pressure) once every second. It also performs a GOST or GOST instantaneous flow calculation each second, followed by flow integration. The GOST flow calculation provides an instantaneous volumetric flow rate (that is adjusted to contract pressure and temperature) and mass flow rate. (Flow calculations and equations are detailed in GOST , , and ) You configure and view the program using three ROCLINK 800 screens (Device Information, Meter Setup, and History Setup) and two program-specific screens (GOST Flow Data and GOST Flows & Accums). 1.3 Program Requirements You download the GOST Flow Calculation program to and then run it from the Flash and RAM memory on the FloBoss 103. The GOST Flow Calculations program is compatible only with firmware version 2.14 (or greater) of the FloBoss 103. Download and configure the program using the ROCLINK 800 Configuration software (version 1.83 or greater). Rev. Mar-09 1

6 The downloadable program is: File Name Unit Task Code Data UDP Gostflow_v2.20.bin FloBoss 103 User C000 22, 23 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). 2 Rev. Mar-09

7 2 INSTALLATION This section provides instructions for installing the GOST Flow Calculation program into FloBoss memory. Read Section 1.3 of this manual for program requirements. 2.1 Downloading the GOST Flow Program This section provides instructions for installing the user program into FloBoss memory. To download the user program 1. Connect the FloBoss to your computer using the LOI port. 2. Start and logon to ROCLINK 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 1): Figure 1. User Program Administrator 5. Click Browse in the Download User Program File frame. The Select User Program File screen displays (see Figure 2). 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 2 shows, the screen lists all valid user program files with the.bin extension: Rev. Mar-09 3

8 Figure 2. Select User Program File 7. 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 4 Rev. Mar-09

9 8. Click Download & Start to begin loading the selected programs. The following message displays: Figure 4. 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 5. ROCLINK 800 Download Confirmation 10. 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 in that frame shows the device status as ON (indicating a successful Warm Start). The Memory Usage frame indicates the memory the program uses. Rev. Mar-09 5

10 Figure 6. User Program Administrator 11. Click Close. The ROCLINK 800 screen displays and the download is complete. 6 Rev. Mar-09

11 3 CONFIGURATION GOST Flow Calculation Program User Manual After you have loaded the GOST Flow program, you configure it and view the results of the calculations using the ROCLINK 800 software. To do this, you use three ROCLINK 800 screens (Device Information, Meter Setup, and History Points) and two program-specific screens (GOST Flow Data and GOST Flows and Accums): Use the Device Information screen to check the units and define the contract hour. Use the Meter Setup screen to define meter values. Use the History Points screen to review pre-configured history points. Use the GOST Flow Data screen to set the program-specific parameters. Use the GOST Flows & Accums screen to view the flow rates and accumulations. Figure 7. ROCLINK 800 Rev. Mar-09 7

12 3.1 Device Information Screen Use this screen to set the engineering units and the contract hour used by the program. To access this screen: 1. From the ROCLINK 800 screen, select ROC > Information. The Device Information screen displays. Figure 8. Device Information 2. Review and change as necessary the values in the following fields: Field Contract Hour Description Indicates the hour at which the system totals values for a single day of production, clears accumulators, and logs data to the Daily History database. 0 represents midnight on a 24-hour clock. Note: Ensure that this value is correct for your organization. Units Sets the engineering units the program uses. Metric is the required value for this program. 3. Click Apply if you changed the values in these fields. 4. Click OK to return to the ROCLINK 800 screen. 5. Proceed to Section 3.2 to configure the Meter Setup screen. 8 Rev. Mar-09

13 3.2 Meter Setup Screen Use the Meter Setup screen to define meter-specific parameters used by the GOST Flow program. To access this screen: 1. From the ROCLINK 800 screen, select Meter > Setup. The Meter Setup screen displays. Figure 9. Meter Setup General Tab Note: The Meter Setup screen has a tab format. Sections through discuss the requirements for each tab on the Meter Setup screen. Rev. Mar-09 9

14 3.2.1 Meter Setup Screen General Tab Use this tab (which displays when you access the Meter Setup screen) to select the meter type and enter the pipe and orifice diameters. To access this screen: 1. From the ROCLINK 800 screen, select Meter > Setup. The Meter Setup screen displays. Figure 10. Meter Setup General Tab 2. Review and change as necessary the content of the following fields: Field Meter Type Description Indicates the type of meter. Orifice is the required selection for this program. Pipe Diameter Orifice Diameter Sets, in millimeters, the diameter of the pipe. Sets, in millimeters, the diameter of the orifice. 3. Click Apply to save the changes. 4. Proceed to Section to configure the Inputs tab. 10 Rev. Mar-09

15 3.2.2 Meter Setup Screen Inputs Tab Use this tab to indicate differential pressure, static pressure, and flowing temperature. To access this screen: 1. Select the Inputs tab from the Meter Setup screen. Figure 11. Meter Setup Inputs Tab 2. Review and change as necessary the content of the following fields: Field Description Differential Pressure Sets the parameter for the differential pressure. Click to display the Select TLP dialog box you use to assign the parameter. The units for the differential pressure are kpa. Static Pressure 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 kpa(g) or kpa(a). Temperature 3. Click Apply to save the changes. 4. Proceed to Section to configure the Advanced tab. 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 C. Rev. Mar-09 11

16 3.2.3 Meter Setup Screen Advanced Tab Use this tab to identify the pressure tap characteristics and pressure value the program uses to calculate absolute pressure. Note: In order to provide program-specific options, the GOST Flow program overrides several parameters on the Advanced tab. Changing the value in the Orifice Material, Pipe Material, Base Temperature, Base Pressure, or Latitude field has no effect on flow calculations. To access this screen: 1. Select the Advanced tab from the Meter Setup screen. Figure 12. Meter Setup Advanced Tab 2. Review and change as necessary the content of the following fields: Field Atmospheric Pressure Pressure Tap 3. Click Apply to save the changes. Description Sets how the system determines atmospheric pressure. Valid selections are Calculate and Enter. If you select Calculate, you must also complete the Elevation field. If you select Enter, you must also complete the kpa value field. Sets the reference and location of the pressure tap. Valid selections for the pressure reference are Gauge and Absolute. Valid selections for the location are, Upstream and Downstream. The tap type is fixed as Flange on this screen, but can be specified on the GOST Flow Data screen, Section Note: If you select Absolute, you do not need to enter a value for the atmospheric pressure. If you select Gauge, you must either enter a value for atmospheric pressure or allow the system to calculate this value. 4. Click OK to exit the screen. Proceed to Section 3.3 to configure the History Setup screen. 12 Rev. Mar-09

17 3.3 History Setup Screen Use the History Setup screen to review the pre-configured history points for this program, as well as define any additional history points your existing applications may require. To access this screen: 1. From the ROCLINK 800 screen, select Configure > History Points. The History Setup screen displays: Figure 13. History Setup 2. Review the pre-configured history points. Hist Point Point Type Parameter Archive Type 1 ERN (Extra Run Params) Minutes Today Totalize 2 FLW (Flow Calcs) Current DP Average 3 FLW (Flow Calcs) Current PF Average 4 FLW (Flow Calcs) Current TF Average 5 FLW (Flow Calcs) IMV Average 6 FLW (Flow Calcs) Hwpf Average 7 FLW (Flow Calcs) Instant Flow Flow Accumulation 8 FLW (Flow Calcs) Instant Energy Flow Accumulation Rev. Mar-09 13

18 3. Configure any additional history points your existing applications may require. If you desire to have hourly and daily mass totals maintained in history, configure a history point as one of the following: Point Type Parameter Archive Type UPD23 Mass Rate per Day (MASSDY) Accumulate/Day or UPD23 Mass Accumulated (MASACC) Totalize 4. Click Apply to save any changes you have made. 5. Click OK to exit the screen. Proceed to Section 3.4 to configure the GOST Flow Data screen. 14 Rev. Mar-09

19 3.4 GOST Flow Data Screen The GOST Flow Data screen enables you to enter program-specific calculation parameters. It also displays calculated values for GOST flows. To access this screen: 1. Click User Program > GOST Flow Calc > from the ROCLINK configuration tree: 2. Double-click Display #23, GOST Flow Data. The GOST Flow Data screen displays showing the Setup tab (see Figure 14): Figure 14. GOST Flow Data Note: The GOST Data screen has a tab format. Sections through discuss the requirements for each tab on the GOST Data screen. Rev. Mar-09 15

20 3.4.1 GOST Flow Data Screen Setup Tab Use this tab (which displays when you access the GOST Flow Data screen) to define basic program parameters. Figure 15. GOST Flow Data Setup Tab 1. Complete the screen fields based on your organization s requirements. Field Limit Check Description Enables the GOST Flow program to use limits of use checks on the process data as defined by the flow calculations. If enabled, an alarm status is set and the flow rate is set to 0.0 if the limit checks are not satisfied. Note: For more information, refer to Section 4.2 GOST Flow Task Limits of Use. SoftPt Enable Enables 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). The GOST Flow program provides the following softpoints: 1 DP (kpa) 2 Tf ( C) 3 Pf (kpa) 4 Base Density (kg/m 3 ) 5 Corrected Orifice Diameter (mm) 6 Corrected Pipe Diameter (mm) 7 Beta Ratio 8 ReD Correction (Kre) 16 Rev. Mar-09

21 Field SoftPt Enable (continued) Error Code Meter Selection Description GOST Flow Calculation Program User Manual 9 Roughness Coefficient (Ksh) 10 Orifice Dulling Coefficient 11 Velocity of Approach (Ev) 12 Expansion Factor (Y1) 13 Discharge Coefficient (CdFT) 14 Mass Flow Rate (kg/h) 15 Qc (m 3 /h) without the roughness (Ksh) and Reynolds number (Kre) correction factors. 16 Qc (m 3 /h) with all factors included. 17 Flowing Density (kg/m 3 ) 18 Specific Heat Ratio 19 Viscosity (cp) 20 Pressure Tap (0=Flange, 1=Corner, 2=Pipe) This read-only field shows any errors the program has encountered during calculations. Most errors occur as a result of failed input data when limit checking is enabled. The program raises an alarm to indicate an error condition. Possible error codes are: 0 OK No calc error or limit encountered 3 Invalid pipe or orifice inputs (d<12.5; D<50; D>1000) 4 Invalid pressure input (p2/p1<0.75; p1<=0; d>=d; dp<0) 5 Invalid specific heat or viscosity (sp ht<0.5; visc<=0) 6 Invalid base density inputs (base density<0) 7 Invalid beta ratio (beta<0.2; beta>0.75) 9 Out of range Reynolds number (Flange: Re>1260*beta 2 *D* Corner/Pipe: Re<=5000 for beta<0.45 else Re<10000) Sets the location of the meter taps. Valid selections are: Orifice Flange Orifice Corner Orifice Pipe Select Orifice Flange if the meter s tap location is flange. Select Orifice Corner if the meter s tap location is corner. Select Orifice Pipe if the meter s tap location is pipe. Flow Calculation Select the flow calculation standard (GOST or GOST ). Fluid Type This read-only field shows the type of fluid passing through the meter. Valid options are: Gas Steam The fluid type is set to Gas if the Steam and Water Thermodynamics Properties User C Program (QER04Q018) is not enabled. The fluid type is set to Steam if the Steam and Water Thermodynamics Properties User C Program (QER04Q018) is enabled and the IAPWS-IF97 region is 2, 4, or 5. Rev. Mar-09 17

22 Field Fluid Type (continued) Properties Calculation Pipe Diameter Pipe Material (A through C) Description Water The fluid type is set to Water if the Steam and Water Thermodynamics Properties User C Program (QER04Q018) is enabled and the IAPWS-IF97 region is 1. This read-only field shows the fluid properties calculation in use. Enter the uncorrected pipe diameter in mm. Identifies the three coefficients for calculating the coefficient of linear expansion for the pipe material. Refer to Table C.1 of GOST for specific values. The calculation used is: where: γ t A B C -6 = 10 A 10-3 Bt Ct = Coefficient of Linear Expansion = Operating Temperature ( C) = Material Temperature Coefficient = Material Temperature Coefficient = Material Temperature Coefficient Pipe Expan Fctr This read-only field shows the calculated value of γ. Orifice Diameter Orifice Material (A through C) Enter the uncorrected orifice diameter in millimeters. Identifies the three coefficients for calculating the coefficient of linear expansion for the orifice material. Refer to Table C.1 of GOST for specific values. Orifice Expan Fctr This read-only field shows the calculated value of γ. Pipe Roughness Inlet Edge Radius Inspection Period Sets, in millimeters, the pipe roughness. Note: The program uses this value as part of the pipe roughness coefficient (Ksh) calculation. Sets, in millimeters, the radius of the inlet edge. Note: The program uses this value as part of the orifice dulling correction (Kp) calculation. Indicates, in years, the inspection period (or calibration span) for the inlet edge radius used in the calculation of the orifice dulling correction (Kp) coefficient. Note: You must enter a whole number. The field does not permit fractions. 2. Click Apply to save any changes you have made to this screen. 3. Proceed to Section to review calculated GOST results Rev. Mar-09

23 3.4.2 GOST Flow Data Screen Calculated Results Tab Use this tab to view calculated GOST values. To access this screen: 1. Select the Calculated Results tab from the GOST Flow Data screen. One of the following four screens displays: Figure 16(a). GOST Flow Data, Calculated Results Tab (Flow Calculation is GOST and Fluid Type is Gas) Figure 16(b). GOST Flow Data, Calculated Results Tab (Flow Calculation is GOST and Fluid Type is Gas) Figure 16(c). GOST Flow Data, Calculated Results Tab (Flow Calculation is GOST and Fluid Type is Steam or Water) Figure 16(d). GOST Flow Data, Calculated Results Tab (Flow Calculation is GOST and Fluid Type is Steam or Water) 2. Review the screen s contents. Field Description Diff Pressure This read-only field shows, in kpa, the differential pressure reading. Flow Pressure This read-only field shows, in kpa, the pressure at which the program calculates flowing compressibility. Rev. Mar-09 19

24 Field Flow Temp Base Density Flowing Density Isentropic Exp Viscosity Base Compressibility Flow Compressibility Compress Coeff (K) Beta Ratio Exp Factor Vel of App Disch Coeff Reynolds No. Kp Ksh Kre Volume Flowrate Mass Flowrate Energy Flowrate Description This read-only field shows, in Deg C, the temperature at which the program calculates the flowing compressibility. This read-only field shows, in kg/m 3, the density at base (standard) conditions. This read-only field shows, in kg/m 3, the density at flowing conditions. This read-only field shows the calculated isentropic exponent (specific heat ratio) of the fluid at flowing conditions. This read-only field shows, in cp, the viscosity of the fluid at flowing conditions. This read-only field shows the gas compressibility at base conditions (Zb). Note: This field only appears if the Fluid Type defined on the Setup tab is Gas. This read-only field shows the gas compressibility at flowing conditions (Zf). Note: This field only appears if the Fluid Type defined on the Setup tab is Gas. This read-only field shows the gas compressibility coefficient (K = Zf/Zb). Note: This field only appears if the Fluid Type defined on the Setup tab is Gas. This read-only field shows the calculated meter beta ratio. This read-only field shows the calculated gas expansion factor. This read-only field shows the calculated velocity of approach factor. This read-only field shows the discharge coefficient for the flowing fluid. This read-only field shows the Reynolds number for the flowing fluid. This read-only field shows the calculated orifice dulling factor. This read-only field shows the calculated pipe roughness correction factor. This read-only field shows the calculated Reynolds no. correction factor it is not used for GOST This read-only field shows, in cubic meters/hour, the current instantaneous volume flow rate at base conditions (20 C, bara). This read-only field shows, in kg/hr, the current instantaneous mass flow rate. This read-only field shows, in MJ/hr, the current instantaneous energy flow rate. 3. Click Close to close this screen. 4. Proceed to Section 3.5 to review the GOST flows and accumulations. 20 Rev. Mar-09

25 3.5 GOST Flows and Accums Screen Use this tab to view calculated GOST volumetric and mass flow rates and accumulations. To access this screen: 1. Click User Program > GOST Flow Calc from the ROCLINK configuration tree: 2. Double-click Display #24, GOST Flows and Accums. The GOST Flows and Accums screen displays as follows (see Figure 17): Figure 17. GOST Flows & Accums 3. Review the screen s contents. Field Description Tag This read-only field shows the unique identifier for the meter. Description DP SP TP Current Values Volume Rate Current Values Energy Rate This read-only field shows the description of the meter. This read-only field shows, in kpa, the differential pressure reading. This read-only field shows, in kpa, the flowing static pressure. This read-only field shows, in Deg C, the flowing temperature. These read-only fields show, in M3/hr and km3/day, the current hourly and daily volumetric flow rates. These read-only fields show, in MJ/Hour and GJ/Day, the current hourly and daily energy rates. Rev. Mar-09 21

26 Field Current Values Mass Rate Accumulations km3 Accumulations GJoule Accumulations Tonnes Accumulations Minutes Description These read-only fields show, in Kg/Hour and Tonnes/Day, the current hourly and daily mass rates. These read-only fields show, in km3, the total volumetric flow for the current day, the previous day, the current month, the previous month, and the accumulated total since the accumulator last reset. These read-only fields show, in GJoules, the total energy for the current day, the previous day, the current month, the previous month, and the accumulated total since the accumulator last reset. These read-only fields show, in Tonnes, the total mass flow for the current day, the previous day, the current month, the previous month, and the accumulated total since the accumulator last reset. These read-only fields show, in Minutes, the flowing time for the current day, the previous day, the current month, the previous month, and the accumulated total since the accumulator last reset. 4. Click Close to close this screen. 5. Proceed to Section 3.6 to save the configuration 22 Rev. Mar-09

27 3.6 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 18. Flags 2. Click Save Configuration. A verification message displays: Figure 19. Save Verification Rev. Mar-09 23

28 3. Click Yes. When the save process completes, a confirmation message displays: Figure 20. 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. 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. 24 Rev. Mar-09

29 4 REFERENCE GOST Flow Calculation Program User Manual This section identifies possible GOST Flow Calculation alarms and provides tables of information on the user-defined point types the GOST Flow Calculation program uses. 4.1 GOST Flow Task Alarm List It is possible to enter data which is unsuitable for the calculations. The program performs checks and may produce one of the following alarms: Calc Error: occurs when a calculation is unable to produce an answer (for example, due to a divide by zero). Data Error: occurs when the input data is invalid. The program checks for differential pressure, pressure, density, pipe diameter, orifice diameter, specific heat ratio, and viscosity. Out of Limits: occurs when the limits of use checks are enabled and data is outside the ranges specified in the standard. 4.2 GOST Flow Task Limits of Use The calculations are valid for the following conditions. You enable checks by selecting the Limit Checks checkbox on the GOST Flow Calculations screen s Setup tab. All Tap Types p2/p Corner and Pipe (D-D/2) Taps d 12.5mm Orifice diam 50mm D 1000mm Pipe diam 0.2 B 0.75 Beta ratio Re > 5000 for 0.2 B 0.45 Reynolds number Re > for B > 0.45 Flange Taps d 12.5mm Orifice diam 50mm D 1000mm Pipe diam 0.2 B 0.75 Beta ratio Re 1260 B * B * D Reynolds number Rev. Mar-09 25

30 4.3 Point Type 22: GOST Flow User Data Point type 22 holds local data the GOST Flow Calculation program uses. The program maintains one logical of this point type, and saves point type 22 to internal configuration memory. Parm # Name Access Data Type Range Default Version Description 0 Orifice Flange R/W UINT Not used (replaced by parameter 19). 1 Orifice Corner R/W UINT Not used (replaced by parameter 19). 2 Orifice Pipe R/W UINT Not used (replaced by parameter 19). 3 Pipe Material A R/W Float Entered pipe material coefficient A. 4 Pipe Material B R/W Float Entered pipe material coefficient B. 5 Pipe Material C R/W Float Entered pipe material coefficient C. 6 Orifice Material A R/W Float Entered orifice material coefficient A. 7 Orifice Material B R/W Float Entered orifice material coefficient B. 8 Orifice Material C R/W Float Entered orifice material coefficient C. 9 Inl Edge Radius (mm) R/W Float Entered inlet edge radius in mm. 10 Pipe Roughness (mm) R/W Float Entered pipe roughness coefficient in mm. 11 Inspectn Period (yr) R/W UINT Entered orifice inspection period in years. 12 Vol Flowrate (Nm3/h) R/O Float Calculated standard volume flow rate in Nm3/h. 13 Mass Flowrate (kg/h) R/O Float Calculated mass flow rate in kg/h. 14 Force Recalc R/W UINT Force recalculations status. 0 = Recalculations are not initiated. 1 = Recalculations are initiated. 15 Softpoint Enable R/W UINT Enter soft point no. to show internal calc values. 16 LimCheck (0=No,1=Yes) R/W UINT Enable/Disable the input data checking. 17 Error Code R/O UINT Indication of why the calculation is failing. 18 Properties Calc R/O AC20 All ASCII Char 'AGA8' 1.00 Text string identifying the gas properties calc in use. 26 Rev. Mar-09

31 Parm # Name Access Data Type Range Default Version Description 19 Pressure Tap R/W UINT Type of differential pressure taps. 0 = Flange 1 = Corner 2 = Pipe 20 Diff Pressure (kpa) R/O Float Input value used by calculation. 21 Flow Pressure (kpa) R/O Float Input value used by calculation. 22 Flow Temperature('C) R/O Float Input value used by calculation. 23 Compress Factor K R/O Float Calculated value = Zf / Zb. 24 Pipe Expan Fctr (mm) R/O Float Calculated from the entered coefficients. 25 Orif Expan Fctr (mm) R/O Float Calculated from the entered coefficients. 26 Pipe Roughness R/O Float Not used; see parameter Orifice Dulling R/O Float Calculated dulling correction coefficient. 28 Rk R/O Float Average of the orifice inlet edge rounded radius in millimeters. 29 Ksh R/O Float Correction coefficient for metering pipeline inside the surface roughness (dimensionless). 30 Kre R/O Float Correction coefficient for the Reynolds number (dimensionless). 31 Qcb R/O Float Calculated standard volume without the Ksh and Kre coefficients, in Nm3/h. 32 Qc R/O Float Calculated standard volume, in Nm3/h. 33 Calc Version R/W UINT GOST calculation standard. 0 = = Rev. Mar-09 27

32 Parm # Name Access Data Type Range Default Version Description 34 Fluid Type R/W UINT The type of fluid passing through the meter. The fluid type is set to Gas if the Steam and Water Thermodynamics Properties User C Program (QER04Q018) is not enabled. The fluid type is set to Steam if the Steam and Water Thermodynamics Properties User C Program (QER04Q018) is enabled and the IAPWS-IF97 region is 2, 4, or 5. The fluid type is set to Water if the Steam and Water Thermodynamics Properties User C Program (QER04Q018) is enabled and the IAPWS-IF97 region is 1. 0 = Gas 1 = Steam 2 = Water 28 Rev. Mar-09

33 4.4 Point Type 23: Mass Calculations Point type 23 holds mass flow rate and accumulations that the GOST Flow Calculation program determines. The program maintains one logical of this point type. Parm # Name Access Data Type Range Default Version Description 0 Point Tag ID R/O AC10 All ASCII Char Meter # Meter run s point tag identification. Every 10 seconds it is set to the value of the point tag ID of point type 46, parameter 0. 1 Mass Rate per Day R/O Float Daily mass flow rate, in Tonnes/Day. 2 Mass Today R/O Float Mass flow accumulation so far today, in Tonnes. 3 Mass Yesterday R/O Float Mass flow accumulation yesterday, in Tonnes. 4 Mass Month R/O Float Mass flow accumulation so far this month, in Tonnes. 5 Mass Previous Month R/O Float Mass flow accumulation the previous month, in Tonnes. 6 Mass Accumulated R/O Float Mass flow on-going accumulator, in Tonnes. This value rolls over when the value exceeds 1,000,000. Rev. Mar-09 29

34 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 USA Houston, TX USA Pickering, North Yorkshire UK Y018 7JA Website: