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Niagara FC Installation & Operation Manual

Mass flow computer
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Model FC - Mass Flow Computer
990272 Rev. A 05/04/12
Model FC
Mass Flow Computer
Installation, Operation
Manual

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  • Page 1 Model FC - Mass Flow Computer 990272 Rev. A 05/04/12 Model FC Mass Flow Computer Installation, Operation Manual...

  • Page 3: Table Of Contents

    FC Flow Computer CONTENTS SAFETY INSTRUCTIONS ......................1 1. INTRODUCTION 1.1 Unit Description ......................2 1.2 Specifications ....................... 3 2. INSTALLATION 2.1 General Mounting Hints ....................8 2.2 Mounting Diagrams ...................... 8 3. APPLICATIONS 3.1 Steam Mass ........................ 13 3.2 Steam Heat ......................... 11 3.3 Steam Net Heat ......................13 3.4 Steam Delta Heat ....................... 14 3.5 Corrected Gas Volume ....................15 3.6 Gas Mass ........................16 3.7 Gas Combustion Heat ....................
  • Page 4 7.4 Computation of the D.P. Factor ................100 8. RS-232 SERIAL PORT 8.1 RS-232 Serial Port Description ................. 101 8.2 Instrument Setup by PC Over Serial Port ..............101 8.3 Operation of Serial Communication Port with Printers ..........101 8.4 FC RS-232 Port Pinout ..................... 101 9. RS-485 SERIAL PORT 9.1 RS-485 Serial Port Description ................. 102 9.2 General ........................102 9.3 Operation of Serial Communication Port with PC ............ 102 9.4 FC RS-485 Port Pinout ..................... 102 10.

  • Page 5: Safety Instructions

    FC Flow Computer SAFETY INSTRUCTIONS The following instructions must be observed. • This instrument was designed and is checked in accordance with regulations in force EN 60950 (“Safety of information technology equipment, including electrical business equipment”). A hazardous situation may occur if this instrument is not used for its intended purpose or is used incorrectly. Please note operating instructions provided in this manual. • The instrument must be installed, operated and maintained by personnel who have been properly trained. Personnel must read and understand this manual prior to installation and operation of the instrument. • The manufacturer assumes no liability for damage caused by incorrect use of the instrument or for modifications or changes made to the instrument. Technical Improvements • The manufacturer reserves the right to modify technical data without prior notice.

  • Page 6: Introduction

    FC Flow Computer 1. Introduction 1.1 Unit Description: Peak Demand Option There are applications where customer charges are determined The FC Flow Computer satisfies the instrument requirements in part by the highest hourly averaged flowrate observed during for a variety of flowmeter types in liquid, gas, steam and heat a billing period. applications. Multiple flow equations are available in a single The peak demand option for the FC is intended for applica- instrument with many advanced features.

  • Page 7: Specifications

    FC Flow Computer 1.2 Specifications: Analog Input: Ranges Environmental Voltage: 0-10 VDC, 0-5 VDC, 1-5 VDC Operating Temperature: 0 to +50 C Current: 4-20 mA, 0-20 mA Storage Temperature: -40 to +85 C Basic Measurement Resolution: 16 bit Humidity : 0-95% Non-condensing Update Rate: 2 updates/sec minimum Materials: UL, CSA, VDE approved Accuracy: 0.02% FS Automatic Fault detection: Signal over/under-range, Approvals: CE Approved Light Industrial, UL/CSA Pending Current Loop Broken Calibration: Operator assisted learn mode. Learns Zero Display and Full Scale of each range Type: 2 lines of 20 characters Fault Protection: Types: Backlit LCD and VFD ordering options Fast Transient: 1000 V Protection (capacitive clamp) Character Size: 0.3" nominal Reverse Polarity: No ill effects User selectable label descriptors and units of measure...
  • Page 8 FC Flow Computer Datalogger (optional) Analog Outputs Type: Battery Backed RAM The analog output usage is menu assignable to correspond Size: 64k to the Heat Rate, Uncompensated Volume Rate, Corrected Initiate: Key, Interval or Time of Day Volume Rate, Mass Rate, Temperature, Density, or Items Included: Selectable List Pressure. Data Format: Printer or CSV Access via RS-232 command (Peak demand and demand last hour optional) Stored Information (ROM) Number of Outputs: 2 Steam Tables (saturated & superheated), General Fluid...
  • Page 9 FC Flow Computer In the setup menu, the flow computer activates the correct Step 3 : Compute the Volumetric Flow- setup variables based on the instrument configuration, the Volumetric flow is the term given to the flow in volume units. flow equation, and the hardware selections made for the The value is computed based on the flowmeter input type...
  • Page 10 In normal operation a steam trap is warm and periodically opens in a form suitable to dump to a printer. DATABASE format will and closes in response to the accumulation of condensate. A output the values in a CSV, or Comma Separated Variable with cold trap is indication that it is not purging the condensate, a Carriage return delimiting of each record. trap that is constantly blowing is an indication that it is stuck open. To avoid a false alarm, the FC permits the user to A number of serial commands are also included to access and program a delay, or time period, which should be considered manipulate information stored with in the datalogger. Among normal for the trap to be either cold, or open. An alarm will these RS232 command capabilities are the following actions: only be activated if the trap is detected as continuously being Clear Data Logger in the abnormal states for a time period greater than this TRAP Send all Data in Datalogger ERROR DELAY time.
  • Page 11 For transaction printing, the user defines the items to be information from the remote MASTER PC. The MASTER included in the printed document. The user can also select PC will end the exchange by handing up. what initiates the transaction print generated as part of the setup of the instrument. The transaction document may be However, it is more common that the FC will be used to initiated via a front panel key depression. control the modem. In these applications the following communication menu settings would be used: In data logging, the user defines the items to be included in RS232 USAGE = MODEM each data log as a print list. The user can also select when...

  • Page 12: Installation

    FC Flow Computer 2. Installation 2.1 General Mounting Hints: General Mounting Hints The FC Flow Computer should be located in an area with a clean, dry atmosphere which is relatively free of shock and vibration. The unit is installed in a 5.43" (138mm) wide by 2.68" (68mm) high panel cutout. (see Mounting Dimensions) To mount the Flow Computer, proceed as follows: a. Prepare the panel opening. Mounting Procedure b. Slide the unit through the panel cutout until the it touches the panel. c. Install the screws (provided) in the mounting bracket and slip the bracket over the rear of the case until it snaps in place. d. Tighten the screws firmly to attach the bezel to the panel. 3 in. lb. of torque must be applied and the bezel must be parallel to the panel. NOTE: To seal to NEMA4X / IP65 specifications, supplied bezel kit must be used NEMA4X / IP65 Specifications and panel cannot flex more than .010". When the optional bezel kit is used, the bezel adaptor must be sealed to the case using an RTV type sealer to maintain NEMA4X / IP65 rating. 2.2 Mounting Diagrams: Bezel Kit Mounting Standard Mounting...
  • Page 13 FC Flow Computer 2.2 Mounting Diagrams: Wall Mount (mounting option W) (continued) 9.4 (238) 4.13 (105) Security Tag Provisions 0.385 2.33 (59) (9.8) 8.4 (213.4) 0.59 (15) 0.625”ø 0.75”ø 5 places 0.75” Conduit Knockouts (5 places) 1.10 1.10 1.10 1.10 1.06 (27)
  • Page 14 FC Flow Computer 2.2 Mounting Diagrams: Explosion Proof Mount (mounting option X) (continued) 12.06 (306.3) 9.31 (236.5) (129.5) 3.81 6.56 (96.8) (166.6) 1/4" - 20UNC-2B TAP x 5/16" DEEP (6) HOLES CENTERED (88.9) ON THREE SIDES FOR MOUNTING .28 ±.02 (76.2) (7.1 ±.5) 1.31...

  • Page 15: Applications

    FC Flow Computer 3. Applications STEAM MASS 3.1 Steam Mass Measurements: A flowmeter measures the actual volume flow in a steam line. A temperature and/or pressure sensor is installed to measure temperature and/or pressure. Calculations: • Density and mass flow are calculated using the steam tables stored in the flow computer.

  • Page 16: Steam Heat

    FC Flow Computer STEAM HEAT 3.2 Steam Heat Measurements: A flowmeter measures the actual volume flow in a steam line. A temperature and/or pressure sensor is installed to measure temperature and/or pressure. Calculations: • Density, mass flow and heat flow are calculated using the steam tables stored in the flow computer. The heat is defined as the enthalpy of steam under actual conditions with reference to the enthalpy of water at T=0°C. • With square law device measurement the actual volume is calculated from the differential pressure, taking into account temperature and pressure compensation.

  • Page 17: Steam Mass

    FC Flow Computer STEAM NET HEAT 3.3 Steam Net Heat Measurements: A flowmeter measures the actual volume flow in a steam line. A temperature and a pressure sensor are installed to measure temperature and/or pressure. All measurement are made on the steam side of a heat exchanger. Calculations: • Density, mass flow and net heat flow are calculated using the steam tables stored in the flow computer. The net heat is defined as the difference between the heat of the steam and the heat of the condensate. For simplification it is assumed that the condensate (water) has a temperature which corresponds to the temperature of saturated steam at the pressure measured upstream of the heat exchanger. • With square law device measurement the actual volume is calculated from the differential pressure, taking into account temperature and pressure compensation.

  • Page 18: Steam Delta Heat

    FC Flow Computer STEAM DELTA HEAT 3.4 Steam Delta Heat Measurements: Measures actual volume flow and pressure of the saturated steam in the supply piping as well as the temperature of the condensate in the downstream piping of a heat exchanger. Calculations: • Calculates density, mass flow as well as the delta heat between the saturated steam (supply) and condensation (return) using physical characteristic tables of steam and water stored in the flow computer. • With square law device measurement the actual volume is calculated from the differential pressure, taking into account temperature and pressure compensation.

  • Page 19: Corrected Gas Volume

    FC Flow Computer CORRECTED 3.5 Corrected Gas Volume GAS VOLUME Measurements: A flowmeter measures the actual volume flow in a gas line. Temperature and pressure sensors are installed to correct for gas expansion effects. Calculations: • Corrected Volume is calculated using the flow, temperature and pressure inputs as well as the gas characteristics stored in the flow computer (see "FLUID DATA" submenu). Use the "OTHER INPUT" submenu to define reference temperature and reference pressure values for standard conditions. Output Results: • Display Results Corrected Volume or Actual Volume Flow Rate, Resettable Total, Non-Resettable Total, Temperature, Pressure, Density (optional: peak demand, demand last hour, time/date stamp) • Analog Output Corrected Volume or Actual Volume Flow Rate, Temperature, Pressure, Density, Peak Demand, Demand Last Hour • Pulse Output...

  • Page 20: Gas Mass

    FC Flow Computer GAS MASS 3.6 Gas Mass Measurements: A flowmeter measures the actual volume flow in a gas line. Temperature and pressure sensors are installed to measure temperature and pressure. Calculations: • Density and mass flow are calculated using gas characteristics stored in the flow computer. • With square law device measurement the actual volume is calculated from the differential pressure, taking into account temperature and pressure compensation.

  • Page 21: Gas Combustion Heat

    FC Flow Computer GAS COMBUSTION 3.7 Gas Combustion Heat Measurements: HEAT A flowmeter measures the actual volume flow in a gas line. Temperature and pressure sensors are installed to measure temperature and pressure. Calculations: • Density, mass flow and combustion heat are calculated using gas characteristics stored in the flow computer. • With square law device measurement the actual volume is calculated from the differential pressure, taking into account temperature and pressure compensation. Output Results: • Display Results Heat, Mass or Volume Flow Rate, Resettable Total, Non-Resettable Total,...

  • Page 22: Corrected Liquid Volume

    FC Flow Computer Corrected 3.8 Corrected Liquid Volume Liquid Volume Measurements: A flowmeter measures the actual volume flow in a liquid line. A temperature sensor is installed to correct for liquid thermal expansion. A pressure sensor can be installed to monitor pressure. Pressure measurement does not affect the calculation. Calculations: • Corrected Volume is calculated using the flow and temperature inputs as well as the thermal expansion coefficient stored in the flow computer (see "FLUID DATA"...

  • Page 23: Liquid Mass

    FC Flow Computer Liquid Mass 3.9 Liquid Mass Measurements: Actual volume flow is measured by the flow element (DP transmitter, Flowmeter). Temperature is measured by the temperature transmitter. A pressure transmitter can be used to monitor pressure. Pressure measurement does not affect the calculation. A density transmitter may be used in place of a temperature transmitter for direct density measurement. Calculations: • The density and mass flow are calculated using the reference density and the thermal expansion coefficient of the liquid (see "FLUID DATA" submenu) Output Results: • Display Results...

  • Page 24: Liquid Combustion Heat

    FC Flow Computer LIQUID COMBUSTION 3.10 Liquid Combustion Heat HEAT Measurements: Actual volume flow is measured by the flow element (DP transmitter, Flowmeter). Temperature is measured by the temperature transmitter. A pressure transmitter can be used to monitor pressure. Pressure measurement does not affect the calculation. Calculations: • The density, mass flow and combustion heat are calculated using the fluid characteristics stored in the flow computer. (see "FLUID DATA" submenu) Output Results: • Display Results Combustion Heat, Mass or Volume Flow Rate, Resettable Total, Non-Resettable Total, Temperature, Pressure, Density (optional: peak demand, demand last hour, time/date stamp) • Analog Output Combustion Heat, Mass or Volume Flow Rate, Temperature, Pressure, Density, Peak Demand, Demand Last Hour • Pulse Output...

  • Page 25: Liquid Sensible Heat

    FC Flow Computer LIQUID SENSIBLE 3.11 Liquid Sensible Heat HEAT Measurements: Actual volume flow is measured by the flow element (DP transmitter, Flowmeter). Temperature is measured by the temperature transmitter. A pressure transmitter can be used to monitor pressure. Pressure measurement does not affect the calculation. Calculations: • The density, mass flow and sensible heat are calculated using the fluid characteristics stored in the flow computer. (see "FLUID DATA" submenu) Output Results: • Display Results Sensible Heat, Mass or Volume Flow Rate, Resettable Total, Non-Resettable...

  • Page 26: Liquid Delta Heat

    FC Flow Computer LIQUID DELTA HEAT 3.12 Liquid Delta Heat Measurements: Actual volume flow is measured by the flow element (DP transmitter, Flowmeter). Temperature of the supply and return lines are measured by the temperature transmitters. Calculations: • The density, mass flow and delta heat are calculated using values of the heat carrying liquid stored in the flow computer. (see "FLUID DATA" submenu) Output Results: • Display Results...

  • Page 27: Steam - Condensate Heat

    FC Flow Computer STEAM – 3.13 Steam – Condensate Heat CONDENSATE Measurements: ENERGY METER Actual condensate volume flow is measured by the flow element (DP transmitter, Flowmeter). Condensate temperature is measured by the temperature transmitter. A pressure transmitter is used to monitor steam pressure. Calculations: • The condensate density, volume flow, mass flow and saturated steam energy - condensate energy are calculated using the fluid characteristics stored in the flow computer. (see "FLUID DATA" submenu)

  • Page 28: Wiring

    FC Flow Computer 4. WIRING 4.1 Terminal Designations Two Relay Terminations Three Relay Option Terminations DC OUTPUT DC OUTPUT FLOW FLOW PULSE IN Vin (+) PULSE IN Vin (+) - - - - - - - - - - Iin (+)

  • Page 29: Typical Wiring Connections

    FC Flow Computer 4.2 Typical Wiring Connections: 4.2.1 Flow Input Analog 4-20 mA Transmitter (+) 24 V Out 4-20 (i.e. DP Transmitter) – 4-20 mA In Analog Voltage Transmitter (+) V In (i.e. Turbine Flowmeter with F/V Converter) – Common 10 mV or 100 mV Signal (i.e.

  • Page 30: Temperature Input

    FC Flow Computer 4.2.4 Temperature Input * Or optional steam trap monitoring input in some saturated steam applications. 4.2.5 Temperature 2 Input...

  • Page 31: Wiring In Hazardous Areas

    FC Flow Computer 4.3 Wiring In Hazardous Areas Examples using MTL787S+ Barrier (MTL4755ac for RTD) 4.3.1 Flow Input Hazardous Area Safe Area DP Transmitter 24V Out 4-20mA In Common 4.3.2 Pressure Input Hazardous Area Safe Area Common 24V Out 4-20mA Pressure Trans- 4-20mA In mitter 4.3.3 Temperature Input...

  • Page 32: Unit Operation

    FC Flow Computer 5. UNIT OPERATION 5.1 Front Panel Operation Concept for Operate Mode HELP How To Use On-Line Help On-line help is provided to assist the operator in using this product. The help is available during OPERATE and SETUP modes simply by pressing the HELP key. The HELP key is used to enter decimals when entering numeric values. How To View VIEWING PROCESS VALUES Process Values In the OPERATE mode, several keys have a special, direct access feature, to display an item of interest (i.e. RATE, TOTAL, ALARM SETPOINT, etc.). Press the key to view your choice. Press the ∆ ∇ keys to view other items in that group. How To Clear The CLEARING TOTALIZER Totalizer To clear the totalizers, you must press the TOTAL Function Key to select the totalizer group.

  • Page 33: General Operation

    FC Flow Computer 5.2 General Operation General Operation This instrument is used primarily to monitor flowrate and accumulated total. The inputs can be software configured for a variety of flowmeter, temperature and pressure sensors. The standard output types include: Pulse, Relay, Analog and RS-232 The unit can display the flowrate, total and process variables. RS-485 is an available option for a second communication channel. Password Protection 5.3 Password Protection After an Private and/or Service Code is entered in the "System Parameters" Submenu Group. (see section 6.3, Private Code and Service Code sub-menus), the unit will be locked. The unit will prompt the user for the password when trying to perform the following functions: Clear Totals Clear Grand Totals (service code required) Edit a Setup Menu Item Edit Alarm Setpoints (ALARM 1 & ALARM 2 Keys) The Service Code should be reserved for service technicians. The Service Code will allow access to restricted areas of the Service and Test menus. Changes in these areas...

  • Page 34: Serial Port Operation

    FC Flow Computer 5.8 RS-232 Serial Port Operation RS-232 Serial Port Operation The RS-232 serial port can be used for programming (using the Setup Disk) or for communicating to printers and computers in the Operating Mode (Run Mode). Enhanced uses include remote metering by modem. PC Communications 5.8.1 PC Communications: The Setup Disk also allows the user to query the unit for operating status such as Flow Rate, Flow Total, Temperature, Pressure, Alarm Setpoints, etc. In this mode of operation the RS232 port is assumed connected to a computer. The FC will act as a slave and answer requests from the PC. See the Universal Protocol Users Manual for a complete listing of the commands set supported. A DDE/OPC Server is also available for use in exchanging information with DDE Clients such as Spread Sheets, Database Programs, and HMI software.

  • Page 35: Programming

    FC Flow Computer 6. PROGRAMMING 6.1 Front Panel Operation Concept for Program Mode The FC is fully programmable through the front panel. The instrument setup menu structure is based on a number of topical submenu groups with one submenu group for each instrument function. Each submenu contains all of the individual settings associated with that function. During the instrument setup, setup topics are shown on the bottom line of the display while the detailed selection options are shown on the top line. A help menu is available for each menu item. Please review the following key usage summary before attempting to setup the instrument.

  • Page 36: Ez Setup

    FC Flow Computer EZ SETUP SETUP EZ SETUP The EZ Setup routine is a quick and easy way to configure the most commonly used instrument functions. We recommend first completing the EZ Setup routine for the flow equation and meter type for your initial application. The setup can then be customized using the complete submenu groups described later in this chapter. Caution: Entering the EZ Setup mode automatically sets many features to a default value (without prompting the user). This may cause any previously programmed information to be lost or reset. Selection: YES, NO Display: EZ SETUP? EZ Setup PAUSE COMPUTATIONS Example: Steam Mass Note: Vortex Flowmeter The "Pause Computations" warning message informs the user that all computations are halted while programming EZ Setup. UNITS Select the desired units of measure. Selection: METRIC, ENGLISH...
  • Page 37 FC Flow Computer EZ SETUP SETUP (Continued) Select the type of fluid appropriate for your application. Fluid Type Selection: SATURATED STEAM, SUPERHEATED STEAM Display: SATURATED STEAM FLUID TYPE Select the flowmeter type used in your application. FLOWMETER TYPE Selection: LINEAR, SQR LAW, SQR LAW-LIN., LINEAR 16 PT, SQR LAW 16 PT, SQR LAW-LIN. 16 PT, LINEAR UVC, GILFLO, GILFLO 16 PT, BYPASS, ILVA16PT, MASS FLOW Display: LINEAR FLOWMETER TYPE Select the appropriate input signal. INPUT SIGNAL Selection: 4-20 mA, 0-20 mA, 0-5 Vdc, 1-5 Vdc, 0-10 Vdc, DIGITAL: 10 mV LEVEL, DIGITAL: 100 mV LEVEL, DIGITAL: 2.5 V LEVEL, 4-20mA STACKED, 0-20mA STACKED, 4-20mA LINEAR MANIFOLD, 0-20mA LINEAR MANIFOLD Display: DIGITAL 2.5 V LEVEL INPUT SIGNAL Enter the K-Factor for the flowmeter.

  • Page 38: Detailed Menu Descriptions

    FC Flow Computer EZ SETUP SETUP (Continued) FULL SCALE VALUE Enter the full scale value for the pressure input signal. (PRESSURE) Input: Number with fixed decimal point: 000.000 ... 999.999 Display: 580.000 psia FULL SCALE VALUE DEFAULT VALUE Enter the default value for the pressure input signal. (PRESSURE) Input: Number with fixed decimal point: 000.000 ... 999.999 Display: 14.696 psia DEFAULT VALUE NOTE: After the last entry has been saved, the display automatically returns to the HOME position. The “EZ Setup” routine is completed and the flow computations are resumed. DETAILED MENU DESCRIPTION...

  • Page 39: System Parameters

    FC Flow Computer SYSTEM PARAMETERS SYSTEM PARAMETERS The EZ Setup routine is a quick and easy way to EZ SETUP configure the most commonly used instrument functions. Reference: Refer to Section 6.2 for EZ Setup Programming. Caution: Entering the EZ Setup mode automatically sets many features to default values without informing the user. This may cause any previously programmed information to be lost or reset Selection: YES, NO Display: EZ SETUP? PAUSE COMPUTATIONS Note: The "Pause Computations" warning message informs the user that all computations are halted while programming EZ Setup. This is the menu location where the operator can unlock ACCESS CODE the unit by entering the correct password (operator or supervisor code), or lock the unit by entering the incorrect password. Selection: 0 - 9999 Display: ACCESS CODE...
  • Page 40 FC Flow Computer SYSTEM PARAMETERS SYSTEM PARAMETERS (Continued) FLOW EQUATION The Flow Equation sets the basic functionality of the unit. Choose the Flow Equation for your particular application. Note: Various setup data is only available depending on the flow equation selected. The flow equation also determines the assignment of the inputs. Caution: Select the flow equation as the first step. We recommend using the EZ Setup to select the proper flow equation. The user can then enter the submenu groups and make additional changes as desired. Selection: GAS COMBUSTION HEAT, GAS MASS, GAS CORRECTED VOLUME, STEAM DELTA HEAT, STEAM NET HEAT, STEAM HEAT, STEAM MASS, LIQUID DELTA HEAT, LIQUID SENSIBLE HEAT, LIQ. COMBUSTION HEAT, LIQUID MASS, LIQ. CORRECTED VOLUME, STM – CONDENSATE HEAT Display: STEAM MASS FLOW EQUATIONS ENTER DATE Enter the date in this format: Day - Month - Year. Note: After prolonged breaks in the power supply (several days) or upon initial start-up of the unit, the date and time must be reset. This does not apply to units with the datalogger or language option.
  • Page 41 FC Flow Computer SYSTEM PARAMETERS SYSTEM PARAMETERS (Continued) ENTER TIME Enter the actual time in this format: Hours - Minutes Note: After prolonged breaks in the power supply (several days) or upon initial start-up of the unit, the date and time must be reset. Input: Flashing selections can be changed. Store and Confirm entries with the ENTER key Display: 13:24 ENTER TIME PRIVATE CODE A personal code may be defined. This code is used to enable program editing. Special Note: Note: After returning to the run mode, program editing • The private code is factory set to 1000 is automatically locked • Entering a private code of "0" will always enable program after 60 seconds as long editing (Turns automatic lock off) as no keys are pressed The program editing Input: can also be disabled by entering a number Maximum 4 digit number: 0...9999...
  • Page 42 FC Flow Computer SYSTEM PARAMETERS SYSTEM PARAMETERS (Continued) ENGINEERING CODE A personal enginerring code may be defined. This code is used to enable program menus that are normally reserved for engineering Note: personnel. The Engineering Code will (i.e.: Service & Analysis Submenu Group) allow access to the same information as the Private Note: Code with the following ad- • The engineering code is factory set to 3000 ditional functions: • The engineering code submenu will only appear if the engineering code was entered for the "Access Code". • Change the Service Code • Change the Order Code Input: • Change the Serial No. • Clear Grand Total • Clear Errors in Error Log Maximum 4 digit number: 0...9999 • View & Perform calibra- Store and Confirm entries with the ENTER key tion in Service & Analysis...
  • Page 43 FC Flow Computer SYSTEM PARAMETERS SYSTEM PARAMETERS (Continued) ORDER CODE The order code (part number) of the unit can be entered. This will help in identifying what options were ordered. Note: • The order number is set at the factory and should only be altered if options are added in the field by an authorized service technician. • Maximum of 10 characters. Input: Alphanumeric characters for each of 10 positions 1...9; A...Z; Flashing selections can be changed. Store and Confirm entries with the ENTER key Display: FCV10P ORDER CODE SERIAL NUMBER The serial number of the unit is assigned at the factory. Note: Maximum of 10 characters. Input: Alphanumeric characters for each of 10 positions 1...9; A...Z; Display: SN 12345 SERIAL NUMBER SERIAL-NO. SENS.

  • Page 44: Display

    FC Flow Computer DISPLAY DISPLAY SCROLL LIST Select the variable that are to be displayed in the "HOME position" during normal operation. Each variable can be assigned to line 1 (L1), line 2 (L2) or NO (removed from scroll list). Note: • To initiate the scroll list press the SCROLL key. The list will be displayed in groups of two, each group is displayed for approximately 3 to 4 seconds. • Any alarm messages will be displayed periodically, alternating throughout the scroll list. Selection (with Prompt): CHANGE? YES, NO ADD TO LIST? L1, L2, NO Variable Selection: HEAT FLOW, MASS FLOW, VOLUME FLOW, STD. VOLUME FLOW, TEMP.1, TEMP.2, DELTA T, PRESSURE, DENSITY, SPEC. ENTHALPY, TIME, DATE, HEAT TOTAL, HEAT GRAND TOTAL, MASS TOTAL, MASS GRAND TOTAL, STD VOLUME TOTAL, STD.V. GRAND TOTAL, VOLUME TOTAL, VOL. GRAND TOTAL, PEAK DEMAND, DEMAND LAST HOUR, PEAK DEMAND TIME, PEAK DEMAND DATE Note: Variable selection will vary depending on Flow Equation selected and options supplied. Display: ADD TO LIST? HEAT FLOW?
  • Page 45 FC Flow Computer DISPLAY DISPLAY (Continued) DISPLAY The "display damping" constant is used to stabilize fluctuating DAMPING displays. The higher the constant, the less fluctuation will be displayed. Note: Relay response time is affected by the value entered for display damping. The larger the display damping value, the slower the relay response time will be. This is intended to prevent false triggering of the relays. Enter a display damping factor of zero (0) for fastest response time. Note: • Factory setting: 1 Input: 2 digits max; 0...99 Display: CONSTANT? DISPLAY DAMPING Enter the number of decimal places for numerical values. MAX. DEC. POINT Note: • The number of decimal places applies to all displayed variables and totalizers. • The number of decimal places is automatically reduced if there is insufficient space available on the display for large numbers. • The number of decimal places set here does not affect the functions set in the programming setup. Selection: 0, 1, 2, 3 or 4 (decimal places) Display: MAX.

  • Page 46: System Units

    FC Flow Computer SYSTEM UNITS SYSTEM UNITS TIME BASE Select "one" unit of time to be used as a reference for all measured or derived and time-dependant process variables and functions such • flowrate (volume/time; mass/time) • heat flow (amount of energy/time) etc. Selection: /s (per second), /m (per minute), /h (per hour), /d (per day) Display: TIME BASE HEAT FLOW UNIT Select the unit for heat flow (amount of energy, combustion heat). Note: The unit selected here also applies to the following: • Zero and full scale value for current. • Relay setpoints Selection: kBtu/time base, kW, MJ/time base, kCal/time base, MW, tons, GJ/h, Mcal/h, Gcal/h, Mbtu/h, Gbtu/h Display: kBtu/h HEAT FLOW UNIT HEAT TOTAL UNIT Select the unit of heat for the particular totalizer. Note: The unit selected here also applies to the following: • Pulse value for pulse output...
  • Page 47 FC Flow Computer SYSTEM UNITS SYSTEM UNITS (Continued) MASS FLOW UNIT Select the unit of mass flowrate (mass/time base). Note: The unit selected here also applies to the following: • Zero and full scale value for current • Relay setpoints Selection: lbs/time base, kg/time base, g/time base, t/time base, tons(US)/time base, tons(long)/time base Display: lbs/h MASS FLOW UNIT MASS TOTAL UNIT Select the unit of mass for the particular totalizer. Note: The unit selected here also applies to the following: • Pulse value for pulse output • Relay setpoints Selection: lbs, kg, g, t, tons(US), tons(long), hlbs, Klbs, Mlbs Display: MASS TOTAL UNIT...
  • Page 48 FC Flow Computer SYSTEM UNITS SYSTEM UNITS (Continued) COR.VOL. Select the unit of corrected volumetric flowrate FLOW UNIT (corrected volume/time base). Note: The unit selected here also applies to the following: • Zero and full scale value for current • Relay setpoints Corrected Volume = volume measured under operating conditions converted to volume under reference conditions. Selection: The available selections will change depending on the flow equation selected. bbl/time base, gal/time base, l/time base, hl/time base, dm time base, ft /time base, m /time base, scf/time base, Nm time base, NI/time base, igal/time base, mcf/time base All units listed above apply to corrected volume. Display: scf/h COR.VOL. FLOW UNIT COR. VOLUME TOT. Select the unit of volume for the particular totalizer. UNIT...
  • Page 49 FC Flow Computer SYSTEM UNITS SYSTEM UNITS (Continued) VOLUME FLOW UNIT Select the unit for volumetric flowrate. Note: The unit selected here also applies to the following: • Zero and full scale value for current • Relay setpoints Selection: The available selections will change depending on the flow equation selected. bbl/time base, gal/time base, l/time base, hl/time base, dm time base, ft /time base, m /time base, acf/time base, igal/ time base All units listed above apply to the actual volume measured under operating conditions. Display: ft3/h VOLUME FLOW UNIT VOLUME TOTAL UNIT Select the unit for uncorrected volume totalizer. Note: The unit selected here also applies to the following: • Pulse value for pulse output • Relay setpoints Selection: The available selections will change depending on the flow equation selected.
  • Page 50 FC Flow Computer SYSTEM UNITS SYSTEM UNITS (Continued) DEFINITION bbl In certain countries the ratio of gallons (gal) per barrels (bbl) can vary according to the fluid used and the specific industry. Select one of the following definitions: • US or imperial gallons • Ratio gallons/barrel Selection:. US: 31.0 gal/bbl f or beer (brewing) US: 31.5 gal/bbl f or liquids (normal cases) US: 42.0 gal/bbl f or oil (petrochemicals) US: 55.0 gal/bbl f or filling tanks imp: 36.0 gal/bbl for beer (brewing) imp: 42.0 gal/bbl for oil (petrochemicals) Display: US: 31.0 gal/bbl DEFINITION bbl TEMPERATURE UNIT Select the unit for the fluid temperature.
  • Page 51 FC Flow Computer SYSTEM UNITS SYSTEM UNITS (Continued) PRESSURE UNIT Select the unit for process pressure. Note: The unit selected here also applies to the following: • Zero and full scale value for current • Relay setpoints • Reference conditions Differential pressure is in mbar for Metric selections Differential pressure is in "H O f or English selections Selection: bara, kpaa, kc2a, psia, barg, psig, kpag, kc2g Definitions: bara kpaa kpa Absolute pressure kc2a kg/cm ("a" for absolute) psia barg bar Gauge pressure compared to kpag kpa atmospheric pressure kc2g kg/cm ("g" for gauge) psig...
  • Page 52 FC Flow Computer SYSTEM UNITS SYSTEM UNITS (Continued) SPEC. ENTHALPY Select the unit for the combustion value (spec. enthalpy). UNIT Note: The unit selected here also applies to the following: • Specific thermal capacity (kWh/kg → kWh/kg - °C) Selection: btu/#, kWh/kg, MJ/kg, kCal/kg (# = lbs = 0.4536 kg) Display: Btu/# SPEC. ENTHALPY UNIT LENGTH UNIT Select the unit for measurements of length. Selection: in, mm Display: LENGTH UNIT...

  • Page 53: Fluid Data

    FC Flow Computer FLUID DATA FLUID DATA FLUID TYPE Select the fluid. There are three types: 1. Steam / Water All information required for steam and water (such as saturated steam curve, density and thermal capacity) is permanently stored in the flow computer. 2. Fluid Displayed Preset information for other fluids (such as air and natural gas) is stored in the flow computer and can directly adopted by the user. If the preset values need to be changed to fit your specific process conditions, then proceed as follows: Select the fluid (air or natural gas) and press the ENTER key (this sets all of the preset values). Re-select the submenu group "FLUID TYPE", now choose "GENERIC" and ENTER. Now the preset values for the previously selected fluid can be altered. 3. Generic Fluid Select the setting "GENERIC" for the Fluid type submenu. The characteristics of any fluid can now be defined by the user. Selection: GENERIC, WATER, SATURATED STEAM, SUPERHEATED STEAM, DRY AIR, HUMID AIR, HUMID GAS, NATURAL GAS, NATURAL GAS (NX-19), HYDROGEN, ARGON, METHANE, NITROGEN, CARBON DIOXIDE, PROPANE, OXYGEN, ETHANE, HELIUM...
  • Page 54 FC Flow Computer FLUID DATA FLUID DATA (Continued) THERM. EXP. COEF. Enter the thermal expansion coefficient for a generic liquid. The coefficient is required for the temperature compensation of volume with various flow equations (i.e. Liquid Mass or Corrected Liquid Volume). Input: Number with floating decimal point: 0.000...100000 (e-6) The thermal expansion coefficient can be calculated as follows: ρ(T ρ(T Thermal expansion coefficient Temperatures at known points (see below) ρ (T ) Density of the liquid at temperature T or T For optimum accuracy, choose the reference temperatures as follows: : midrange temperature : choose a second point at or near the maximum process temperature The value entered is internally multiplied by a factor of 10 (display: e-6/temp. unit) since the value to be entered is very small. Display: 104.300 (e-6/oF) THERM.EXP.COEF. Enter the specific combustion heat for generic fuels.
  • Page 55 FC Flow Computer FLUID DATA FLUID DATA (Continued) FLOW. Z-FACTOR Enter a Z-factor for the gas at operating conditions. The Z-factor indicates how different a "real" gas behaves from an "ideal gas" which exactly obeys the "general gas law" (P x V/T = constant; Z=1). The further the real gas is from its condensation point, the closer the Z-factor approaches "1". Note: • The Z-factor is used for all gas equations. • Enter the Z-factor for the average process conditions (pressure and temperature). Input: Number with fixed decimal point: 0.1000...10.0000 Display: 1.000 FLOW. Z-FACTOR REF. Z-FACTOR Enter a Z-factor for the gas at reference conditions. Note: • The Z-factor is used for all gas equations. • Define the standard conditions in the submenu "STP REFERENCE" (OTHER INPUT submenu group). Input: Number with fixed decimal point: 0.1000...10.0000 Display: 1.000 REF. Z-FACTOR ISENTROPIC EXP.
  • Page 56 FC Flow Computer FLUID DATA FLUID DATA (Continued) MOLE % NITROGEN Enter the Mole % Nitrogen in the anticipated natural gas mixture. This information is needed by the NX-19 computation Note: Select "NATURAL GAS (NX-19)" in "FLUID TYPE" to activate this function. Input: Number with fixed decimal point: 0.00...15.00 Display: 0.00 MOLE % NITROGEN MOLE % CO Enter the Mole % CO in the anticipated natural gas mixture. This information is needed by the NX-19 computation Note: Select "NATURAL GAS (NX-19)" in "FLUID TYPE" to activate this function. Input: Number with fixed decimal point: 0.00...15.00 Display: 0.00 MOLE % CO2 VISCOSITY COEF. A Enter the Viscosity coefficient A for the anticipated fluid. This...
  • Page 57 FC Flow Computer FLUID DATA FLUID DATA (Continued) VISCOSITY COEF. B Enter the Viscosity coefficient B for the anticipated fluid. This information is needed by the viscosity computation for UVC and for Reynolds Number calculations. Note: Select "SQUARE LAW 16PT" or "LINEAR UVC" in "FLOWMETER TYPE" to activate this function. Input: Number with fixed decimal point: 0.000000...1000000 Display: 0.3850 VISCOSITY COEF. B Computation Computation of Viscosity Coef. A and B of Viscosity The flow computer solves an equation which computes the viscosity as a function of temperature. Two Coef. A and B parameters must be entered for this calculation to be performed. These are the setup parameters Viscosity Coef. A and Viscosity Coef. B. A table listing these values for common fluids is available from the factory.

  • Page 58: Flow Input

    FC Flow Computer FLOW INPUT FLOW INPUT FLOWMETER TYPE Select the flowmeter type. The flow equation (see SYSTEM PARAMETERS) and the flowmeter selected here determine the basic operation of the flow computer. Selection: LINEAR Volumetric flowmeter with linear pulse or analog output.
  • Page 59 FC Flow Computer FLOW INPUT FLOW INPUT (Continued) SQUARE LAW Select the type of square law flowmeter to be used with the FLOWMETER instrument. Note: This selection will only appear if one of the Square Law selections were made in "FLOWMETER TYPE".
  • Page 60 FC Flow Computer FLOW INPUT FLOW INPUT (Continued) Set the low scale value for the analog input signal. LOW SCALE The value entered here must be identical to the value set for the flowmeter. Note: • For flowmeters with analog/linear output, the flow computer uses the selected system units for volumetric flowrate. • The units for differential pressure flowmeters are dependent on the system units selected for pressure: - Imperial units [inches H2O] - Metric units: [mbar] Input: Number with floating decimal point: 0.000...999999 Display: .000 ft3/h LOW SCALE VALUE Set the full scale value for the analog input signal. FULL SCALE The value entered here must be identical to the value set for the flowmeter. Note: • For flowmeters with analog/linear output, Target, generic square law and Gilflo flowmeters, the flow computer uses the selected system units for volumetric flowrate. • The units for differential pressure flowmeters are...
  • Page 61 FC Flow Computer FLOW INPUT FLOW INPUT (Continued) FULL SCALE-HI ll scale value for the high range transmitter analog input signal. RANGE The value entered here must be identical to the value set for the flowmeter. Note: • The units for differential pressure flowmeters are dependent on the system units selected for pressure: - Imperial units [inches H2O] - Metric units: [mbar] Input: Number with floating decimal point: 0.000...999999 Display: 10000.00 ft3/h FULL SCALE VALUE Enter the value of delta P at which the unit will begin using the hi SWITCH UP DP range delta P pressure transmitter signal. Input: Number with floating decimal point: 0.000...999999 Display: 0.000 in H2O SWITCH UP DP...
  • Page 62 FC Flow Computer FLOW INPUT FLOW INPUT (Continued) K-FACTOR Enter the K-Factor of the flowmeter. Note: • The K-Factor is expressed in pulses per unit volume (as defined by "total units") Input: Number with floating decimal point: 0.001...999999 Display: .000 ft3/h LOW FLOW CUTOFF INLET PIPE BORE Enter the inlet pipe diameter or bore for the piping section upstream of the flow measurement device. Input: Number with floating decimal point: 0.001...1000.00 Display: 4.090 in INLET PIPE BORE ENTER BETA Enter the geometric ratio for the square law device being used. This value is given by the manufacturer of the orifice plate, or other square law device. Note: "Beta" is only required for measuring gas or steam with some...
  • Page 63 FC Flow Computer FLOW INPUT FLOW INPUT (Continued) METER EXP. COEF. The flowmeter pipe expands depending on the temperature of the fluid. This affects the calibration of the flowmeter. This submenu allows the user to enter an appropriate correction factor. This is given by the manufacturer of the flowmeter. This factor converts the changes in the measuring signal per degree variation from calibration temperature. The calibration temperature is entered into the flow computer to 70 F / 21 °C. Some manufacturers use a graph or a formula to show the influence of temperature on the calibration of the flowmeter. In this case use the following equation to calculate the meter expansion coefficient: Meter expansion coefficient Q(T) Volumetric flow at temperature T resp. T Average process temperature Calibration temperature Note: • This correction should be set in either the flowmeter or in the flow computer. • Entering the value "0.000" disables this function • Value can be calculated from Fa factor Input: Number with floating decimal point: 0.000...999.9 (e-6/°X) Display: 27.111 (E-6/oF) METER EXP. COEF.
  • Page 64 FC Flow Computer FLOW INPUT FLOW INPUT (Continued) DP FACTOR The DP-Factor describes the relationship between the flowrate and the measured differential pressure. The flowrate is computed according to one of the three following equations, depending on the selected flow equation: Steam (or gas) mass flow: √ ε • • 2 • ∆p • ρ 1 – K • (T – T Liquid volume flow: √ • (2 • ∆p) /ρ (1 – K •...
  • Page 65 FC Flow Computer FLOW INPUT FLOW INPUT (Continued) DP FACTOR The DP-Factor (K ) can be entered manually or the flow computer (Continued) can compute it for you. The information necessary for this calculation can be found on the sizing sheet from a flowmeter sizing program. Note: The following data must be entered before the flow computer can compute the DP-Factor. 1. Flow equation see "SYSTEM PARAMETER" 2. Fluid Data see "FLUID DATA" 3. Beta see "FLOW INPUT" 4. Meter expansion coef. ref see "FLOW INPUT" 5. STP Ref. temperature*, pressure see "OTHER INPUT" 7. Inlet Pipe Bore see "FLOW INPUT" 8. Calibration Temp. see "OTHER INPUT" * only for gas flow equations. Entries: CHANGE FACTOR? CHANGE FACTOR? If "YES" the flow computer will prompt you further: COMPUTE FACTOR? NO COMPUTE FACTOR? YES If "NO":...
  • Page 66 FC Flow Computer FLOW INPUT FLOW INPUT (Continued) DP FACTOR The flow computer will then compute the gas expansion factor (Continued) (ε ), (Y ) using one of the following equation: Orifice Case: ∆p = 1 – (0.41 + 0.35 β ) • ε κ • p • 27.7 V-Cone, Venturi, Flow Nozzle, Wedge Case: ∆p R = 1 – 27.7 • p κ...
  • Page 67 FC Flow Computer FLOW INPUT FLOW INPUT (Continued) DP FACTOR The DP-Factor (K ) is then computed using one of the following (Continued) equations: Steam: M • (1 – K • (T – T • √2 • ∆p • ρ ε Liquid: Q • (1 – K • (T – T 2 •...
  • Page 68 FC Flow Computer FLOW INPUT FLOW INPUT (Continued) With many flowmeters, the relationship between the flowrate and the LINEARIZATION output signal may deviate from an ideal curve (linear or squared). The flow computer is able to compensate for this documented deviation using a linearization table. The appearance of the linearization table will vary depending on particular flowmeter selected. Linear flowmeters with pulse output The linearization table enables up to 16 different frequency & K-factor pairs. The frequency and corresponding K-factor are prompted for each pair of values. Pairs are entered in ascending order by frequency. Linear Flowmeters with pulse outputs and a UVC Curve: The linearization table enables up to 16 different Hz/cstks and K-Factor points. The Hz/cstks and corresponding K-Factors are prompted for each pair of values. Pairs are entered in ascending order by Hz/cstks. Linear flowmeters with analog output (excluding Gilflo, ILVA) The linearization table enables up to 16 different flowrate &...
  • Page 69 FC Flow Computer FLOW INPUT FLOW INPUT (Continued) FLOWMETER Enter the Flowmeter Location LOCATION Selection: Hot, Cold: Display: COLD FLOWMETER LOCATION Enter the Bypass Calibration Factor. BYPASS CAL. FACTOR Input: Max. 6 digit number: 0.000001...999999 Display: 1.000000 BYPASS CAL. FACTOR BYPASS EAm Enter the Bypass EAm Factor. FACTOR Input: Max. 6 digit number: 0.000001...999999 Display: 1.000000 BYPASS EAM FACTOR Enter the Bypass DC Factor.

  • Page 70: Other Input

    FC Flow Computer OTHER INPUT OTHER INPUT SELECT INPUT In addition to the flow input, the flow computer provides two other inputs for temperature, density and/or pressure signals. In this submenu, select the particular input which is to be configured in the following submenus. Input 1 may also be used in conjunction with a steam trap monitor. Selection: 1 (input 1: Temperature or Steam Trap Monitor) 2 (input 2: Pressure, Temperature 2, Density) Display: SELECT INPUT INPUT SIGNAL Determine the type of measuring signal produced by the temperature, pressure or density sensor. Note: When saturated steam is measured with only a pressure sensor, "INPUT 1 NOT USED" must be selected. If only a temperature sensor is used, "INPUT 2 NOT USED" must be selected. Selection: Input 1 (Temperature): INPUT 1 NOT USED, RTD TEMPERATURE, 4-20 TEMPERATURE, 0-20 TEMPERATURE, MANUAL TEMPERATURE*, 4-20 mA TRAP STATUS Input 2 (Process pressure, Temperature 2, Density): INPUT 2 NOT USED, 4-20 PRESSURE (G), 0-20 PRESSURE (G), MANUAL PRESSURE*, 4-20 PRESSURE (ABS.), 0-20 PRESSURE (ABS.), RTD TEMPERATURE 2, 4-20 TEMPERATURE 2, 0-20 TEMPERATURE 2, MANUAL TEMPERAT. 2*, 4-20 DENSITY, 0-20 DENSITY, MANUAL DENSITY* * Select this setting if a user defined fixed value for the corresponding measuring value is required.
  • Page 71 FC Flow Computer OTHER INPUT OTHER INPUT (Continued) LOW SCALE VALUE Set the low scale value for the analog current input signal (value for 0 or 4 mA input current). The value entered here must be identical to the value set in the pressure, temperature or density transmitter. Input: Number with fixed decimal point: -9999.99...+9999.99 Display: 32.00 of LOW SCALE VALUE FULL SCALE VALUE Set the full scale value for the analog current input signal (value for 20 mA input current). The value entered here must be identical to the value set in the pressure, temperature or density transmitter. Input: Number with fixed decimal point: -9999.99...+9999.99 Display: 752.00 of FULL SCALE VALUE DEFAULT VALUE A fixed value can be defined for the assigned variable (pressure, temperature, density). The flow computer will use this value in the following cases: • In case of error (i.e. defective sensors). The flow computer...
  • Page 72 FC Flow Computer OTHER INPUT OTHER INPUT (Continued) BAROMETRIC PRESS. Enter the actual atmospheric pressure. When using gauge pressure transmitters for determining gas pressure, the reduced atmospheric pressure above sea level is then taken into account. Input: Number with floating decimal point: 0.0000...10000.0 Display: 1.013 bara BAROMETRIC PRESS. CALIBRATION TEMP. Enter the temperature at which the flowmeter was calibrated. This information is used in the correction of temperature induced effects on the flowmeter body dimensions. Input: Number with fixed decimal point: -9999.99...+9999.99 Display: 68.00 of CALIBRATION TEMP. VIEW INPUT SIGNAL This feature is used to see the present value of the compensation input signal. The type of electrical signal is determined by the compensation input signal type selection.

  • Page 73: Pulse Output

    FC Flow Computer 6.10 PULSE OUTPUT PULSE OUTPUT Assign the pulse output to a measured or calculated totalizer value. ASSIGN PULSE OUT- Selection: HEAT TOTAL, MASS TOTAL, CORRECTED VOL. TOTAL, ACTUAL VOLUME TOTAL Display: ACTUAL VOLUME TOTAL ASSIGN PULSE OUTPUT...
  • Page 74 FC Flow Computer 6.10 PULSE OUTPUT PULSE OUTPUT (Continued) PULSE TYPE The pulse output can be configured as required for an external device (i.e. remote totalizer, etc.). ACTIVE: Internal power supply used (+24V). PASSIVE: External power supply required. POSITIVE: Rest value at 0V (active high). NEGATIVE: Rest value at 24V (active low) or external power supply. Active: – Internal Push-Pull Power 12345678 Supply Passive: 12345678 Open Collector External Power Supply – Positive Pulse: Negative Pulse:...
  • Page 75 FC Flow Computer 6.10 PULSE OUTPUT PULSE OUTPUT (Continued) PULSE VALUE Define the flow quantity per output pulse. This is expressed in units per pulse (i.e. ft / pulse). Note: Ensure that the max. flowrate (full scale value) and the pulse value entered here agree with one another. The max. possible output frequency is 50Hz. The appropriate pulse value can be determined as follows: Pulse value > estimated max. flowrate (full scale)/sec required max. output frequency Input: Number with floating decimal point: 0.001...10000.0 Display: 1.000 ft3/P PULSE VALUE PULSE WIDTH Set the pulse width required for external devices. The pulse width limits the max. possible output frequency of the pulse output. For a certain output frequency, the max permissible pulse width can be calculated as follows: Pulse width < 1 . 2 • max. output frequency (Hz) Input: Number with floating decimal point: 0.01...9.999 s (seconds)

  • Page 76: Current Output

    FC Flow Computer 6.11 CURRENT OUTPUT CURRENT OUTPUT SELECT OUTPUT Select the current output to be configured. The flow computer offers two current outputs. Selection: 1 (Current output 1) 2 (Current output 2) Display: SELECT OUTPUT ASSIGN CURRENT Assign a variable to the current output. Selection: HEAT FLOW, MASS FLOW, COR. VOLUME FLOW, VOLUME FLOW, TEMPERATURE, TEMPERATURE 2, DELTA TEMPERATURE, PRESSURE, DENSITY, PEAK DEMAND, DEMAND LAST HOUR Display: VOLUME FLOW ASSIGN CURRENT OUT. CURRENT RANGE Define the 0 or 4 mA low scale current value. The current for the scaled full scale value is always 20 mA. Selection: 0-20 mA, 4-20 mA, NOT USED Display:...
  • Page 77 FC Flow Computer 6.11 CURRENT OUTPUT CURRENT OUTPUT (Continued) TIME CONSTANT Select the time constant to determine whether the current output signal reacts quickly (small time constant) or slowly (large time constant) to rapidly changing values (i.e. flowrate). The time constant does not affect the behavior of the display. Input: Max. 2 digit number: 0...99 Display: TIME CONSTANT CURRENT OUT VALUE Display the actual value of the current output. Display: 0.000 mA CURRENT OUT VALUE SIMULATION Various output currents can be simulated in order to check any CURRENT instruments which are connected. Note: • The simulation mode selected affects only the selected current output. The flow computer is fully operational during simulation. • Simulation mode is ended immediately after exiting this submenu.

  • Page 78: Relays

    FC Flow Computer 6.12 RELAYS RELAYS SELECT RELAY Set relay output to be configured. Two or three relay outputs are available. Selection: 1 (Relay 1) 2 (Relay 2) 3 (Relay 3, optional) Display: SELECT RELAY Both relays (1 and 2, and optional 3rd relay) can be assigned to RELAY FUNCTION various functions as required: Alarm functions Relays activate upon exceeding limit setpoints. Freely assignable to measured or calculated variables or totalizers. Malfunction Indication of instrument failure, power loss, etc. Pulse output The relays can be defined as additional pulse outputs for totalizer values such as heat, mass, volume or corrected volume. Wet steam alarm The flow computer can monitor pressure and temperature in superheated steam applications continuously and compare them to the saturated steam curve. When the degree of superheat (distance to the saturated steam curve) drops below 5 °C, the relay switches and the message "WET STEAM ALARM" is displayed. NOTE: Relay response time is affected by the value entered for display damping.
  • Page 79 FC Flow Computer 6.12 RELAYS RELAYS (Continued) RELAY MODE Set when and how the relays are switched "ON" and "OFF". This defines both the alarm conditions and the time response of the alarm status. Selection: HI ALARM, FOLLOW LO ALARM, FOLLOW HI ALARM LATCH LO ALARM LATCH RELAY PULSE OUTPUT Note: • For relay functions "MALFUNCTION" and "WET STEAM ALARM". There is no difference between the modes "HI.." and "LO..": (i.e. HI ALARM FOLLOW = LO ALARM FOLLOW, HI ALARM LATCH = LOW ALARM LATCH) • Relay mode "RELAY PULSE OUTPUT" defines the relay as an additional pulse output. Display: HI ALARM, FOLLOW RELAY MODE LIMIT SETPOINT After configuring a relay for "Alarm indication" (limit value), the required setpoint can be set in this submenu. If the variable reaches the set value, the relay switches and the corresponding message is displayed. Continuous switching near the setpoint can be prevented with the "HYSTERESIS" setting.
  • Page 80 FC Flow Computer 6.12 RELAYS RELAYS (Continued) PULSE VALUE Define the flow quantity per output pulse if the relay is configured for "RELAY PULSE OUTPUT".. This is expressed in units per pulse (i.e. ft / pulse). Note: Ensure that the max. flowrate (full scale value) and the pulse value entered here agree with one another. The max. possible output frequency is 5Hz. The appropriate pulse value can be determined as follows: Pulse value > estimated max. flowrate (full scale)/sec required max. output frequency Input: Number with floating decimal point: 0.001...1000.0 Display: 1.000 ft3/P PULSE VALUE PULSE WIDTH Enter the pulse width. Two cases are possible: Case A: Relay set for "MALFUNCTION" or limit value The response of the relay during alarm status is determined by selecting the pulse width.
  • Page 81 FC Flow Computer 6.12 RELAYS RELAYS (Continued) HYSTERESIS Enter a hysteresis value to ensure that the "ON" and "OFF" switchpoints have different values and therefore prevent continual and undesired switching near the limit value. Input: Number with floating decimal point: 0.000...999999 Display: 0.000 psia HYSTERESIS RESET ALARM The alarm status for the particular relay can be cancelled here if (for safety reasons) the setting ".., LATCH" has been selected in the submenu "RELAY MODE". This ensures that the user is actively aware of the alarm message. Note: • When in the HOME position, press the ENTER key to acknowledge and clear alarms. • The alarm status can only be permanently cancelled if the cause of the alarm is removed. Selection: RESET ALARM? NO RESET ALARM? YES Display: RESET? RESET ALARM SIMULATE RELAY As an aid during start-up, the relay output may be manually controlled independent of it's normal function.

  • Page 82: Communication

    FC Flow Computer 6.13 COMMUNICATION COMMUNICATION (Continued) RS-232 USAGE The flow computer can be connected via RS-232 interface to a personal computer or printer. Selection: COMPUTER, PRINTER, MODEM Display: COMPUTER RS-232 USAGE DEVICE ID Enter the unique unit I.D. tag number for the flow computer if a number of flow computers are connected to the same interface. Selection: Max. 2 digit number: 0...99 Display: DEVICE ID BAUD RATE Enter the baud rate for serial communication between the flow computer and a personal computer, modem, or printer. Selection: 9600, 2400, 1200, 300 Display: 9600 BAUD RATE PARITY Select the desired parity. The setting selected here must agree with the parity setting for the computer, modem, or printer. Selection:...
  • Page 83 FC Flow Computer 6.13 COMMUNICATION COMMUNICATION (Continued) PRINT LIST Select the variables or parameters which are to be logged or printed via the RS-232 interface. Selection (Procedure): CHANGE? NO CHANGE? YES If YES selected, the available variables are displayed one after another. Only some of the following options are available depending on the flow equation selected: Store option Print? advance to next PRINT HEADER? NO(YES) INSTRUMENT TAG? NO(YES) FLUID TYPE? NO(YES) TIME? NO(YES) DATE? NO(YES) TRANSACTION NO.? NO(YES) HEAT FLOW? NO(YES) HEAT TOTAL? NO(YES) HEAT GRAND TOTAL? NO(YES) MASS FLOW?
  • Page 84 FC Flow Computer 6.13 COMMUNICATION COMMUNICATION (Continued) PRINT INITIATE Datalogger and/or printing variables and parameters over the serial RS-232 interface can be initiated at regular intervals (INTERVAL) or daily at a fixed time (TIME OF DAY) or by front key depression. Note: Printing can always be initiated by pressing the PRINT key. Selection: NONE, TIME OF DAY, INTERVAL, ENABLE PRINT KEY Display: TIME OF DAY PRINT INITIATE DATALOG ONLY Select YES or NO for Datalog Only prompt. Selection: YES - Data is logged but no information is sent on print event. NO - Data is logged and immediately transmitted. Display: DATALOG ONLY PRINT INTERVAL Define a time interval. Variables and parameters will be periodically logged at regular intervals of this value of time. The setting "00:00" deactivates this feature. Input: Time value in hours & minutes (HH:MM). Display: 00:00...
  • Page 85 FC Flow Computer 6.13 COMMUNICATION COMMUNICATION (Continued) SEND INC. TOT. ONLY Select YES or NO for Send Inc. Tot. Only Selection: YES - Unit will send Inc. Tot. Only NO - Unit will not send Inc. Tot. Only Display: SEND INC. TOT. ONLY Enter multiplying factor for Inc Only Scaler INC ONLY SCALER Selection: X1, X10, X100, X1000 Display: INC ONLY SCALER Select YES or NO for Clear Datalog CLEAR DATALOG Selection: YES - Unit wil clear datalog contents NO - Unit will not clear datalog contents...
  • Page 86 FC Flow Computer 6.13 COMMUNICATION COMMUNICATION (Continued) MODEM AUTO Select YES or NO for Modem Auto Answer ANSWER (Modem) Selection: YES - Modem will answer incoming calls. NO - Modem will not answer incoming calls. Display: MODEM AUTO ANSWER CALL OUT NO Define a Call Out Number. Enter the telephone number, or email (Modem) address to be called. Input: max. 16 digit phone number Display: ### ### ### ### #### CALL OUT NO CALL OUT TIME Define the Call Out Time. Enter scheduled call out time (24 hr format),...
  • Page 87 FC Flow Computer 6.13 COMMUNICATION COMMUNICATION (Continued) HANG UP IF INACTIVE Select YES or NO for Hang Up If Inactive (Modem) Selection: YES - Unit will hang up if remote PC fails to respond within several minutes after connection is established. NO - Unit will not hang up if remote PC fails to respond after connection is established. Display: HANG UP IF INACTIVE...
  • Page 88 FC Flow Computer 6.13 COMMUNICATION COMMUNICATION (Continued) ERROR MASK Select YES or NO for Change Error Mask? prompt (Modem) Selection: YES, NO Display: 00:00 CALL OUT TIME If YES selected, define the conditions that you wish to call out on. The possible conditions are displayed one after another. Store option Change? advance to next POWER FAILURE NO(YES) WATCHDOG TIMEOUT NO(YES) COMMUNICATION ERROR NO(YES) CALIBRATION ERROR NO(YES) PRINT BUFFER FULL NO(YES) TOTALIZER ERROR NO(YES) WET STEAM ALARM NO(YES) OFF FLUID TABLE NO(YES) FLOW IN OVERRANGE...

  • Page 89: Network Card

    FC Flow Computer 6.14 NETWORK CARD NETWORK CARD PROTOCOL The flow computer can be connected via RS-485 interface to a personal computer and communicate via Modbus RTU protocol. Selection: MODBUS RTU Display: MODBUS RTU PROTOCOL DEVICE ID Enter the unique unit I.D. tag number for the flow computer if a number of flow computers are connected to the same interface. Selection: 3 digit number: 1...247 Display: DEVICE ID BAUD RATE Enter the baud rate for serial communication between the flow computer and a personal computer. Selection: 19200, 9600, 4800, 2400, 1200, 600, 300 Display: 9600 BAUD RATE PARITY Select the desired parity. The setting selected here must agree with the parity setting for the computer. Selection:...

  • Page 90: Service & Analysis

    FC Flow Computer 6.15 SERVICE & ANALYSIS SERVICE & ANALYSIS EXAMINE AUDIT Two counters contain the number of times the calibration and/or TRAIL configuration parameters have been changed. Changes in important calibration and configuration data are registered and displayed ("electronic stamping"). These counters advance automatically. These counters cannot be reset so that unauthorized changes can be identified. Example: CAL 015 CFG 076 Display: CAL 015 CFG 076 EXAMINE AUDIT TRAIL ERROR LOG A list of errors that have occurred can be viewed and cleared. Selection: VIEW? NO VIEW? YES If "YES" is selected the error log can be viewed and errors individually cleared (if editing enabled with Service Code). Display: CLEAR? POWER FAILURE SOFTWARE Display the software version of the flow computer. (Contact local...
  • Page 91 FC Flow Computer 6.15 SERVICE & ANALYSIS SERVICE & ANALYSIS (Continued) PERFORM This feature allows the calibration of the units inputs and outputs. CALIBRATION CAUTION: NOTE: The calibration should only be performed by qualified technicians. This menu item will only The calibration procedure requires the use of precision Voltage & appear if editing is en- Current sources, a frequency generator, a 100Ω resistor (± 0.1%), abled with Service Code. an ammeter, an ohmmeter and a frequency counter. If calibration fails, use the "Restore Factory Calibration" feature. Selection: NO, YES Display: PERFORM? CALIBRATION VOLTAGE INPUT Connect your voltage source to (+) Pin 2 and (-) Pin 4. CALIBRATION LEARN Apply 0.0 Volts. Press enter to learn 0.0 Volts. 0.0 V (Pin 2) Display: RESULT: 0.000 V...
  • Page 92 FC Flow Computer 6.15 SERVICE & ANALYSIS SERVICE & ANALYSIS (Continued) CURRENT INPUT Connect your current source to (+) Pin 7 and (-) Pin 4. CALIBRATION (continued) LEARN Apply 0.0 mA. Press enter to learn 0.0 mA. 0.0 mA (Pin 7) Display: RESULT: 0.000 mA LEARN 0.0 mA PIN 7 LEARN Apply 20.0 mA. Press enter to learn 20.0 mA. 20.0 mA (Pin 7) Display: RESULT: 20.000 mA LEARN 20.0 mA PIN 7...
  • Page 93 FC Flow Computer 6.15 SERVICE & ANALYSIS SERVICE & ANALYSIS (Continued) ANALOG OUTPUT 1 Connect your Ammeter (current meter) to (+) Pin 14 and (-) Pin 16. CALIBRATION (Pins 14 & 16) Observe the reading on the ammeter. Using the numeric keys, enter 4 mA the actual reading (in mA) and press enter. (Pins 14 & 16) Display: ACTUAL? 4.025 mA ADJ 4mA PIN 14-16 Observe the reading on the ammeter. Using the numeric keys, enter 20 mA the actual reading (in mA) and press enter.
  • Page 94 FC Flow Computer 6.15 SERVICE & ANALYSIS SERVICE & ANALYSIS (Continued) RELAY TEST Using the ohmmeter, check continuity between pins (17 & 18) and 18 & 19 while turning ON & OFF Relay 1 using the up/down arrow keys. RELAY 1 Press enter when test is completed. TEST (Pins 17, 18 & 19) Display: RELAY 1: TEST RELAY 1 RELAY 2 Using the ohmmeter, check continuity between pins 20 & 21 and TEST (21 & 22) while turning ON & OFF Relay 2 using the up/down arrow (Pins 20, 21 & 22) keys. Press enter when test is completed.
  • Page 95 FC Flow Computer 6.15 SERVICE & ANALYSIS SERVICE & ANALYSIS (Continued) PRINT SYSTEM SETUP This feature allows the units setup parameters to be printed to a connected printer. Display: PRINT SYSTEM SETUP SELF CHECK This feature starts the self-test of the flow computer. A test is internally conducted on the EEPROM, A/D Converter, Time/Date clock, Display and several other hardware circuits. Display: RUN? SELF CHECK SERVICE TEST The Service Test requires a special calibration apparatus that (Not available with 3 connects to the rear terminals of the unit. This is used to determine Relay option) whether the flow computer or the field wiring is faulty. The calibration apparatus may be purchased from your local distributor. NOTE: Display: This will only appear if...

  • Page 96: Principle Of Operation

    FC Flow Computer 7. Principle Of Operation General 7.1 General: Operation The FC Flow Computer uses several internal calculations to compute the compensated flow based on specific data input. Several computations are performed to arrive at the uncompensated flow, temperature, pressure, density and viscosity. This information is then used to compute the Corrected Volume Flow, Mass Flow or Heat Flow. Square Law 7.2 Square Law Flowmeter Considerations: Flowmeter Considerations Head class flowmeters are supplied by the manufacturers with a 4-20 mA output span which is already in flow units. The FC permits the user to enter this flowmeter infor- mation directly. However, closely associated with this information is the density that was assumed during flowmeter calibration. This information must also be input if the user is to obtain maximum accuracy. It is assumed that the user has the printout from a standardized sizing program for the particular device he will be using. Such standardized printouts list all the necessary information which the user will then be prompted for. Several specialized flow equations are listed that are not intended for the standard unit but to be offered to appropriate OEMs or as special order items. These are desig- nated by a “†”. Note concerning Fluid Information The user will be prompted for Fluid Information during the setup of the instrument.

  • Page 97: Pressure Computation

    FC Flow Computer 7.3.2 Pressure Input: Pressure Computation General Case Pf = [% input span • (Pres full scale - Pres low scale ] + Pres low scale Gauge Case Pf = Pf + Barometric Manual Case or In Event of Fault Pf = Pressure Default Value 7.3.3 Temperature Computation: Temperature Computation General Case Tf = [% input span • (Temp full scale - Temp low scale ] + Temp low scale RTD Case Tf = f ( measured input resistance) Manual Case or In Event of Fault...

  • Page 98: Corrected Volume Flow Computation

    FC Flow Computer 7.3.4 Viscosity (cP) Computation: Density/Viscosity Computation Liquid Case NOTE: (continued) viscosity (in cP) Viscosity cS = cP viscosity = A • exp flowing density ( Tf + 459.67) density of water @ 4°C Gas Case cP viscosity = A • ( Tf + 459.67) Steam Case cP viscosity = f(Tf, Pf) 7.3.5 Corrected Volume Flow Computation: Corrected Liquid Case Volume Flow std. volume flow = volume flow • ( 1 - Therm.Exp.Coef. •( Tf - T Computation Gas Case std.volume flow = volume flow • Pf . • (T + 273.15) • Z...

  • Page 99: Mass Flow Computation

    FC Flow Computer 7.3.5 After calculating the adjusted pressure and temperature, the mixture’s pressure and tempera- ture correlations parameters are calculated by Corrected P = P + 14.7 T = Volume Flow 1000 Computation The compressibility factor is then calculated by first determining (continued) m = 0.0330378T – 0.0221323T + 0.0161353T n = (0.265827T + 0.0457697T – 0.133185T B = 3 – mn b = 9n – 2mn – 54mp D = [b + (b + B Where E is a function of the pressure p and temperature T correlation parameters. The equations for is deter- E are given in the following table for the designated regions. The following compressibility mined by B / D – D + n / 3p...

  • Page 100: Heat Flow Computation

    FC Flow Computer 7.3.8 Heat Flow Computation: Heat Flow Computation Steam Heat heat flow = mass flow • total heat steam(Tf, Pf) Steam Net Heat heat flow = mass flow • [total heat steam(Tf, Pf) - heat saturated water(Pf)] Steam Delta Heat heat flow = mass flow • [total heat saturated steam (Pf) - heat water (Tf)] 7.3.9 Sensible Heat Flow: Sensible Heat Flow Special Case for Water Computation heat flow = mass flow (Tf) • enthalpy ( Tf ) 7.3.10 Liquid Delta Heat: Liquid Delta Heat...
  • Page 101 FC Flow Computer Verabar Case 7.3.11 Expansion Factor − − β ⋅ 18093 4191 Computation for ⋅ Γ ⋅ Square Law Flowmeters (Continued) Where: ⋅ β = The sensor blockage = π ⋅ π = 3.14159 = Internal pipe diameter in inches.

  • Page 102: Uncompensated Flow Computation

    FC Flow Computer 7.3.12 Uncompensated Flow Computation: Uncompensated Flow Computation Pulse, Linear Case input frequency • Time Scaling Factor volume flow = K-Factor • [1 - Meter Exp.Coeff. • ( Tf - T Analog, Linear Case Measured Input Flow volume flow = [1 - Meter Exp.Coeff. • ( Tf - T Square Law Case DP Factor 2•delta P volume flow = • Y • [1 - Meter Exp.Coeff. • ( Tf - T density Square Law , Target Flowmeter Case √ density cal. volume flow = input flow • √ density flowing Pulse, Linearization Case input frequency • Time Scaling Factor...

  • Page 103: Ilva Flow Meter Equations

    FC Flow Computer 7.3.13 ILVA Flow Meter ILVA Flowmeter - This meter type requires an initial linearization using the lineariza- Equations tion table. In addition, the following specialized corrections are required. Y = 1 – (115.814 • (dp / p) • 0.0001) For Gas/Steam Expansion (imperial) Where: Y = gas expansion correction (NOTE: Y=1 for liquid) dp = differential pressure - inches water gauge p = upstream pressure - psia For Reynolds Number (volumetric calculations for Gas/Steam) Cre = (1 – (n / Qn) to a maximum value of m...

  • Page 104: Computation Of The Dp Factor

    FC Flow Computer 7.4 Computation of the DP Factor It is assumed that the user has the printout from a standardized sizing program for the particular device he will be using. Such standardized printouts list all the necessary information which the user will then be prompted for by the instrument or diskette. It is also important that the user select the flow equation to be used and either select or enter the following items: Flowmeter Type The fluid type or the fluid properties applicable to the fluid to be measured Beta, Meter Exp. Coeff., Inlet Pipe Bore Reference Conditions of temperature, pressure, Z and calibration temperature The user is prompted for the following: mass flow or volume flow or corrected volume flow as indicated by the flow equation Differential Pressure Inlet Pressure Temperature Density Isentropic Exponent The unit then computes the following results corresponding to the user entry conditions and appropriate methods: Finally the DP Factor is computed as follows: Steam Case mass flow • [1 - Meter Exp.Coeff. • ( Tf - T DP Factor = Y • [ 2 • delta P • density] Liquid Case volume • [1 - Meter Exp.Coeff. • ( Tf - T DP Factor = 2 • delta P density Gas Case Std.Vol.Flow • ref density • [1 - Meter Exp.Coeff. • ( Tf - T...

  • Page 105: Serial Port

    8.3 Operation of Serial Communication Port with Printers FC’s RS-232 channel supports a number of operating modes. One of these modes is intended to support operation with a printer in metering applications requiring transaction printing, data logging and/or printing of calibration and maintenance reports. For transaction printing, the user defines the items to be included in the printed document. The user can also select what initiates the transaction print generated as part of the setup of the instrument. The transaction document may be initiated via a front panel key depression. In data logging, the user defines the items to be included in each data log as a print list. The user can also select when or how often he wishes a data log to be made. This is done during the setup of the instrument as either a time of day or as a time interval between logging. The system setup and maintenance report list all the instrument setup parameters and usage for the current instrument configuration. In addition, the Audit trail information is presented as well as a status report listing any observed malfunctions which have not been corrected. The user initiates the printing of this report at a designated point in the menu by pressing the print key on the front panel. 8.4 FC RS-232 Port Pinout 1 Handshake Line (cd in) 2 Transmit (tx) 3 Receive (rx) 4 Do Not Use 5 Ground 6 Do Not Use 7 RTS out 8 Do Not Use 9 DC Power Out* * 8 VDC Power supplied on Pin 9 to power modem...

  • Page 106: Serial Port

    The optional RS-485 card utilizes Modbus RTU protocol to access a variety of process parameters and totalizers. In addition, action routines can be executed. For further information, contact factory and request RS-485 Protocol manual. 9.3 Operation of Serial Communication Port with PC The flow computer's RS-485 channel supports a number of Modbus RTU commands. Refer to port pinout (below) for wiring details. Modbus RTU drivers are available from third party sources for a variety of Man Machine Interface software for IBM compatible PC's. The user reads and writes information from/to the RS-485 using the Modbus RTU commands. The FC then responds to these information and command requests. Process variables and totalizers are read in register pairs in floating point format. Time and date are read as a series of integer register values. Alarms are individually read as coils. Action routines are initiated by writing to coils. 9.4 FC RS-485 Port Pinout 1 Ground 2 Ground 3 Ground 4 TX/RX (+) 5 TX/RX (-) NOTES: 4 is internally connected to 8 6 Do Not Use 5 is internally connected to 9 7 Terminating Resistor (180 Ω) To terminate end of cable, connect 8 TX/RX (+) pin 7 to either 4 or 8.

  • Page 107: Flow Computer Setup Software

    FC Flow Computer 10. Flow Computer Setup Software The FC setup program provides for configuring, monitoring and controlling a FC unit. Sample applications are stored in disk files. The setup program calls these Templates. You can store the setup from the program’s memory to either the FC (Downloading the file) or to a disk file (Saving the file) for later usage. Similarly you can load the setup in program memory from either a disk file (Opening a file) or from the FC unit (Uploading a file). The program can monitor outputs from the unit while it is running. The program can reset alarms and totalizers. The peak demand may be reset when the option is supplied. For assistance there are mini-helps at the bottom of each screen in the program. There is also context sensitive help available for each screen accessible by pressing the F1 key. 10.1 System Requirements: IBM PC or compatible with 386 or higher class microprocessor 4 MB RAM 3 MB free disk space VGA or higher color monitor at 640 x 480 Microsoft Windows™ 3.1 or 3.11 or Windows 95/98™ or higher ® Communication Port - RS-232 RS-232 Cable (customer supplied) 10.2 Cable and Wiring Requirements: The serial communication port on your PC is either a 25 pin or 9 pin connector. No cabling is supplied with the setup software. A cable must be purchased separately or made by the user. It is recommended to purchase a serial cable which matches the available communication port on you PC and a 9 pin male connection for the FC serial port.

  • Page 108: File Tab

    The Template Section provides for opening and saving templates. The Save and Save As buttons provide the standard Windows functionality for dealing with files. The Open button is used to open existing templates. The Open option allows for creating custom templates using the existing template in memory as the starting point. Assign a new name for this template. The template will be saved under this new name. A typical scenario using the setup program would be the following: • Open up a predefined template from the supplied list • Choose ‘Save As’ to save this to a new file name • Proceed to customize the template by making any changes that are needed • Save the template to disk (if you want to reuse this template) • Download the template to an attached unit. The Communications with FC Section allows the user to upload the setup from the unit or download the program’s current template to the unit. The Print (report) Section allows the user to: 1. Configure the current Windows printer through the Select Printer option. 2. Print a Maintenance Report through the PC's printer using the Print Maintenance option. 3. Print the current setup through the PC's printer using Print Setup option. 10.6 Setup Tab The Setup tab is where the majority of the FC instrument setup modifications are done. The Setup tab is divided into five sections. System Section: Parameters, Display, Units Input Section: Flow, Fluid, Compensation Inputs...

  • Page 109: View Tab

    FC Flow Computer 10.7 View Tab The View Tab screen allows for viewing selected group items on the PC in a similar format to that shown on the unit display. Data from the following groups can be viewed in the List of Values section: Process Parameters (i.e. rate, temperature) Totalizers (i.e. total, grand total) Input Signals Analog Output Error Status FC Software Version Information The setup software assumes the current setup has been uploaded from the flow computer into the PC. It is important that the setup program and the FC unit are using the same setup information at all times or the data will be inconsistent. It is best to upload or download the setup before using this feature to synchronize the setups. Error Log Data from the error logger is viewed in a separate Error Log section on the screen. To start the viewer, first check the boxes of items to view and then click the start button. The data will appear in the appropriate sections and will be continuously updated. The refresh rate is dependent on the number of items that are being viewed and the baud rate of the connection. Data in the List of Values section can be collapsed by clicking on the ‘minus’ sign in front of the group title. The data can be expanded by clicking on the ‘plus’ sign in front of the group title. If a group is collapsed and data in the group changes on refresh, the group will automatically expand. Data in the Error Log section does not expand or collapse. Changing the view items requires stopping the current viewing, checking the new selections and then restarting the viewer. If communication errors occur while reading data from the FC device, the word ‘Error’ will appear in place of the actual value. If the connection to the FC is lost, the viewer will time out with a message saying the device is not responding. The viewer will attempt to communicate with the FC device matching the device ID set in the communications screen. If you are having trouble establishing communication, compare settings for the PC and the flow computer. Also verify the connections between the PC and flow computer. 10.8 Misc. Tab This tab has three sections: Tools, Actions and Options.

  • Page 110: Glossary Of Terms

    FC Flow Computer 11. Glossary of Terms Access Code A numeric password which is entered by a user attempting to gain entry to change setup parameters. AGA-3 A empirical flow equation applicable to orifice and several other square law flowmeters. AGA-5 A gas flow equation for computing the combustion heat flow from measured volume flow, temperature and pressure as well as stored gas properties. AGA-7 A gas flow equation for pulse producing, volumetric flowmeters which computes the equivalent flow at reference conditions from the measurements made at flowing line conditions. Assign Usage A menu selection during the setup of the instrument which selects the intended usage for the input/output. Barometric Pressure An entry of the average, local atmospheric pressure at the altitude or elevation of the installation. (typically 14.696 psia) Beta A important geometric ratio for a square law flowmeters. Calibration An order sequence of adjustments which must be performed in order for the equipment to operate properly. Calibration Temperature The temperature at which a flow sensor was calibrated on a test fluid. Combustion Heat The energy released by a fluid fuel during combustion . Default A value to be assumed for manual inputs or in the event of a failure in a input sensor. Display Damping An averaging filter constant used to smooth out display bounce. DP Factor A scaling constant for a square law flowmeter.
  • Page 111 FC Flow Computer 11. Glossary of Terms (Continued) Full Scale The value of the process variable at the full scale or maximum input signal. Inlet Pipe Bore The internal pipe diameter upstream of the flow measurement element. Isentropic Exponent A property of a gas or vapor utilized in orifice meter calculations. K-Factor The calibration constant for a pulse producing flowmeter expressed in pulses per unit volume Linear A flow measurement device where the output signal is proportional to flow. Linear 16 Pt. A mathematical approximation to a nonlinear device where by a correction factor or K-Factor table as a function of input signal is utilized to eliminate flowmeter nonlinearity. Low Flow Cutoff The value of input signal below which flow rate may be assumed to be 0 and at which totalization will cease. Low Scale The value of the process variable at the zero input signal. Manual An entry value to be used as a fixed condition in a equation Meter Exp. Coef.
  • Page 112 FC Flow Computer 11. Glossary of Terms (Continued) Scroll List The user’s desired display list which can be presented on the two list display on Line 1 and/or L2 when the SCROLL key is depressed. Self Check A diagnostic sequence of steps a unit performs to verify it’s operational readiness to perform it’s intended function. Service Test A diagnostic sequence requiring specialized test apparatus to function to verify system readiness. Setpoint An alarm trip point. Simulation A special operating mode for an output feature which enables a service personnel to manually exercise the output during installation or trouble shooting operations. Square Law Flowmeters Types of measurement devices which measure differential pressure across a known geometry to make a flow measurement. SQR LAW (Square Law w/o SQRT) A square law flow measurement device equipped with a pressure transmitter with out a integral square root extractor. SQR LAW-LIN (Square Law w/ SQRT) A square law flow measurement device equipped with a pressure transmitter with integral square root extraction.

  • Page 113: Diagnosis And Troubleshooting

    FC Flow Computer 12. Diagnosis and Troubleshooting 12.1 Response of FC on Error or Alarm: Error indications which occur during operation are indicated alternately with the measured values. The FC Flow Computer has four types of error: TYPE OF ERROR DESCRIPTION System Alarms Errors detected due to system failure Sensor/Process Alarms Errors detected due to sensor failure or process alarm conditions Service Test Errors Errors detected due to problems found during service test. (Service test can only...

  • Page 114: Error Messages

    FC Flow Computer 12.3 Error Messages: Error Message Cause Remedy NOTE: The 24 VDC output has POWER FAILURE Power has been interrupted Acknowledge Error a self resetting fuse. Remedy not required WATCHDOG TIMEOUT Possible transient Acknowledge Error Remedy not required COMMUNICATION Possible Improper wiring or Check wiring and ERROR usage Message Transmission communication settings failure. / protocol CALIBRATION ERROR Operator Error Repeat Calibration PRINT BUFFER FULL Print buffer full, Data may be Check paper and...
  • Page 115 FC Flow Computer 12.3 Error Messages: (Continued) Error Message Cause Remedy RTD 2 OPEN Open circuit detected on RTD Check wiring and RTD 2 input RTD 2 SHORT Short circuit detected on RTD 2 Check wiring and RTD input PULSE OUT OVERRUN Pulse output has exceeded the Adjust pulse value or internal buffer pulse width Iout 1 OUT OF RANGE Current output 1 is below or Adjust the "0"/ "Full above specified range Scale" values or increase/ lower flowrate...
  • Page 116 FC Flow Computer Error Message Cause Remedy PULSE OUT ERROR Pulse output error detected By Factory Service during service test run Iout 1 ERROR Current output 1 error detected By Factory Service during service test run Iout 2 ERROR Current output 2 error detected By Factory Service during service test run RELAY 1 ERROR Relay 1 error detected during By Factory Service service test run RELAY 2 ERROR Relay 2 error detected during...

  • Page 117: Fluid Properties Table

    FC Flow Computer Appendix A - Fluid Properties Table Fluid Properties Table LIQUID FLUID REF. REF. COEFF. OF COMBUSTION SPECIFIC LIQ.VISC. VISCOSITY BY DENSITY TEMP. (ºF) EXPANSION HEAT (Btu/lb) HEAT ANDREDE’s ANDREDE’s (lb./ft LIQUID H (Btu/lb °F) EQUATION EQUATION and CO COEFF.

  • Page 118: Appendix B - Setup Menus

    FC Flow Computer Appendix B - Setup Menus...

  • Page 119: Setup Menus With Supervisor Code Access

    FC Flow Computer Appendix B- Setup Menus (continued)

  • Page 120: Appendix C- Rs-485 Modbus Protocol

    FC Flow Computer Appendix C- RS-485 Modbus Protocol RS-485 & Modbus RTU Protocol When the Flow Computer is equipped with the RS-485 communication option, the protocol it uses is the Modbus RTU protocol. This protocol defines a message structure that hosts and clients will recognize and use on the RS-485 network over which they communicate. It describes the process a master device (PC compatible) uses to request access to another device (Flow Computer), how it will respond to requests from the other devices, and how errors will be detected and reported. It establishes a common format for the layout and contents of message fields. During communications on a Modbus RTU network, the protocol determines how each Flow Computer will know its device address, recognize a message addressed to it, determine the kind of action to be taken, and extract any data or other information contained in the message. If a reply is required, the Flow Com- puter will construct the reply message and send it using Modbus RTU protocol. RTU Mode The Flow Computer with RS-485 communications option supports the Modbus RTU (Remote Terminal Unit) mode only. The Modbus ASCII mode is not supported. The main advantage of the RTU mode is that its greater character density allows better data throughput than ASCII for the same baud rate. The Modbus RTU uses a Master-Slave Query-Response Cycle in which the Flow Computer is the slave device. Control Functions The Flow Computer with RS-485 communications option supports the following function codes: CODE NAME DESCRIPTION Read Coil Status Read a single coil Read Holding Register Read a range of holding registers Force Single Coil...

  • Page 121: Wiring Pinout And Installation

    FC Flow Computer Appendix C- RS-485 Modbus Protocol (continued) Flow Computer RS-485 Port Pinout (recommended mating connector: DB-9M) 1 Ground 2 Ground Phone Line for Internal Modem Option 3 Ground RS-232 RS-485 4 TX/RX (+) 5 TX/RX (-) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 6 Do Not Use 7 Terminating Resistor (180 Ω)
  • Page 122 FC Flow Computer Appendix C- RS-485 Modbus Protocol (continued) Terminal Layout for Wall Mount Option: NEMA 12, 13 Terminal Designations NEMA 12, 13 Terminal Layout NEMA 12. 13 Terminal Diagram: NEMA 12. 13 Terminal Layout RS-232 Phone RS-485 RATE 147.43 TOTAL 267395.749...

  • Page 123: Register And Coil Usage

    FC Flow Computer Appendix C- RS-485 Modbus Protocol (continued) Register & Coil Usage Register Usage (each register is 2 bytes) NOTE: The Float data type follows the IEEE format for a 32 bit float. FC Data Register Data Type Heat Flow Reg 40001 & 40002 Float Mass Flow Reg 40003 & 40004 Float STD Volume Flow Reg 40005 & 40006 Float Volume Flow Reg 40007 & 40008 Float Temperature 1 Reg 40009 & 40010 Float Temperature 2 Reg 40011 & 40012 Float Delta Temperature Reg 40013 & 40014...
  • Page 124 FC Flow Computer Appendix C- RS-485 Modbus Protocol (continued) Register & Coil Usage (continued) Register Usage (each register is 2 bytes) FC Data Register Data Type STD Total Units Reg 40087 Integer Vol. Total Units Reg 40088 Integer Definition of Barrel Reg 40089 Integer Specific Enthalpy Units Reg 40090 Integer Length Units Reg 40091 Integer Calibration trail Reg 40092 Integer Configuration trail Reg 40093...
  • Page 125 FC Flow Computer Appendix C- RS-485 Modbus Protocol (continued) COIL USAGE (each coil is 1 bit) FC Data Coil Data Type Sensor/Process Alarm Relay 1 Lo Alarm Coil 00023 Sensor/Process Alarm Relay 2 Hi Alarm Coil 00024 Sensor/Process Alarm Relay 2 Lo Alarm Coil 00025 Sensor/Process Alarm Relay 3 Hi Alarm Coil 00026 Sensor/Process Alarm Relay 3 Lo Alarm Coil 00027 Service Test 24Vdc Out Error Coil 00028 Service Test Pulse In Error Coil 00029 Service Test Input 1 Vin Error Coil 00030 Service Test Input 1 Iin Error Coil 00031 Service Test Input 2 Iin Error Coil 00032 Service Test Input 2 RTD Error Coil 00033 Service Test Input 3 Iin Error Coil 00034...

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