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Flowmetrics 922-MFC Installation And Operating Instructions Manual

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922-MFC
Installation and Operating Instructions
99651 02/02/06

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  • Page 1 922-MFC Installation and Operating Instructions 99651 02/02/06...
  • Page 2 WARNING ! This instrument contains electronic components that are susceptible to damage by static electricity. Please observe the following handling procedures during the removal, in- stallation, or handling of internal circuit boards or de- vices. Handling Procedures 1. Power to unit must be removed. 2.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS CHAPTERS PAGE NUMBER 1.0 Introduction 1.1 Description of the Flow Computer ..... 1-1 1.2 Flow Computer Features........1-2 1.3 Flow Computer Application ....... 1-3 2.0 Installation of the Flow Computer 2.1 Mounting the Flow Computer ......2-1 2.2 Connecting Inputs and Outputs ......
  • Page 4 TABLE OF CONTENTS CHAPTERS PAGE NUMBER 3.19 Examining Hardware ........3-36 3.20 Examining Computations ......... 3-37 3.21 Examining Variables .........3-37 4.0 16 Point Programming 4.1 General Information ........... 4-1 4.2 16 Point Digital Setup ........4-2 4.3 16 Point Analog Setup ........4-4 4.4 16 Point Calculations .........4-6 5.0 General Specifications 5.1 Input Specifications ..........5-1...
  • Page 5 TABLE OF CONTENTS CHAPTERS PAGE NUMBER 8.0 RS232 Serial Communications Table of Chapter Contents ......8-1 Appendix i ..... Operating Parameters Appendix ii ....Conversion Factors Appendix iii ....Programming Error Messages Appendix iv ....Alarm Messages...

  • Page 6: Chapters

    Chapter 1 1.0 Introduction 1.1 Description of the Flow Computer The Flow Computer is a microprocessor based instrument designed to measure and compensate flow in an industrial environment. Three inputs, temperature, pressure and flow, are provided for calculating the flow at standard conditions.

  • Page 7: Flow Computer Features

    Scaled digital and 4-20 mA analog current outputs, that represent compensated flow, are standard for use in re- mote monitoring of flow. Two form C relays provide iso- lated compensated flow and temperature/pressure alarm outputs. There is a single precision voltage reference in the unit used for all analog measurements.

  • Page 8: Flow Computer Application

    1.3 Flow Computer Application § Pressure transducer sends 0-5V signal to Flow Computer. § 100Ω RTD direct hook-up to Flow Computer. § Turbine flowmeter sends digital signal to Flow Computer. § Flow Computer calculates flow and sends out signals. § 5 V pulse out to remote totalizer in supervisory area. §...

  • Page 9: Connecting Inputs And Outputs

    Chapter 2 2.0 Installation of the Instrument 2.1 Mounting the Instrument The Flow Computer can be mounted in a user panel greater than 0.047" (1.2mm) and less than 0.187" (4.7mm) thick. Figure 2-1 shows the cutout dimensions, bezel size, and depth needed for the instru- ment.

  • Page 10: Dimensional Layout

    7.349 (186.7) 7.055 (179.2) 3.305 (83.9) 8.170 (207.5) 7.365 ± .010 (187.0 ± .25) PANEL 2.496 ± .010 (187.0 ± .25) CUTOUT 2.480 (62.9) .525 (13.3) 6.000 (152.4) Figure 2-1 Dimensional Layout...

  • Page 11: Wiring Label

    Figure 2-2 Wiring Label...

  • Page 12: Rtd Wiring Diagrams

    RTD EXCITATION + RTD SENSE + RTD SENSE - RTD EXCITATION - GROUND (SHIELD) 2 WIRE CONNECTION RTD EXCITATION + RTD SENSE + RTD SENSE - RTD EXCITATION - GROUND (SHIELD) 3 WIRE CONNECTION RTD EXCITATION + RTD SENSE + RTD SENSE - RTD EXCITATION - GROUND (SHIELD)

  • Page 13: Analog Input Wiring Diagrams

    4-20 mA FLOW COMPUTER Temperature Transmitter I in + GROUND (SHIELD) V in + + 24 V 24 V Return GROUND (SHIELD) 4-20 mA CONNECTION 5 Volt FLOW COMPUTER Pressure Transmitter I in + GROUND (SHIELD) V in + + 24 V 24 V Return GROUND (SHIELD) 0-5 VOLT CONNECTION...

  • Page 14: Analog Output Wiring Diagram

    GROUND (SHIELD) Figure 2-5 Analog Output Wiring Diagram...

  • Page 15: Pulse Input And Output Wiring Diagrams

    GROUND (SHIELD) Figure 2-6 Pulse Input and Output Wiring Diagrams...

  • Page 16: Programming Considerations

    Chapter 3 3.0 Programming Considerations 3.1 Programming Programming the Flow Computer for your desired opera- tion is essentially simple. The variables required by the unit are displayed as the operator progresses through the setup menu. The unit will automatically determine its setup parameter requirements depending on the computa- tion and hardware setup selections.

  • Page 17: Programming The Flow Computer

    3.2 Front Panel Operation (continued) 0 - 9 - Keys used to enter in numbers. Numerical values appear from left to right as keys are pressed. Just as if you were typing. The 0 key is used to enter a negative (-) sign.
  • Page 18 Top Level Menu Items Standby Mode Operation Mode Run? Show Data? Go to standby? Set Computations? Setup data display? Engineering Units? Setup print list? Set Hardware? Print system setup? Set Variables Clear Totalizer? Clear Totalizer? Examine Hardware? Check Alarm? Examine Comps? Lock / Unlock? Examine Variables? Real time clock?

  • Page 19: Top Level Setup Menu

    3.4 Top Level Setup Menu On initial power up, the instrument will display the Top Level Setup prompts. Before entering the Run mode, you must set up the operating parameters for proper opera- tion of the instrument. The Top Level Setup Menu is shown in Figure 3-1.
  • Page 20 Graphical representation of the Computation menu Set Computations? Flow computation: Prompt Selections Ideal gas - Volume? Ideal gas - Mass? Steam tables - Mass? Liquids - Mass? Liquids - Volume? Heat - Gas? Heat - Steam? Heat - Liquid? Del Heat - Liquids? Use the following review to select the proper computation for your application.

  • Page 21: Setting The Engineering Units

    Heat - Gas: Uses volume, pressure and temperature to yield a compensated Mass flow as well as Heat flow. The resulting Heat flow is displayed in Btu/h (kW, kcal/h, MJ/h) and totalled in Btu (kWh, kcal, MJ). Heat - Steam: Uses volume and pressure and/or temperature to yield a compensated Mass flow as well as Heat flow.

  • Page 22: Setting The Hardware

    Graphical representation of the Engineering units menu Engineering Units? Prompt Engineering units: Selections English? kPa (Metric)? kg/cm2 (Metric)? bar (Metric)? Use the following review to select the desired units for your application. Temperature °F; Pressure PSI; Other data as English (Imperial): described in Appendix i.
  • Page 23 To get to the Hardware menu . . . Display shows Press Run? Set Computations? until . . . Set Hardware? Pressure? A, B, C, or ENT Graphical representation of the Hardware menu Set Hardware? Prompt Input Configuration: Input Configuration: Input Configuration: Selections Temperature?

  • Page 24: Setting The Variables

    Notes on setting the Hardware. The pressure input is always the gage pressure of the line. Differential pressure is selected under the flow in- put type. Input Type " 5 Volts? " is a 0 to 5 volt signal. 1 to 5 Volt signals cannot be handled properly due to software con- straints.
  • Page 25 Refer to Appendix i for a complete listing of parameters used in this section and the units required for various flow equations and units of measure. To get to the Variables menu . . . Display shows Press Run? Set Computations? until .
  • Page 26 3.8.1 Setting the Pressure Variables The Pressure variables determine how the input signals from Channel 2 are interpreted. The pressure transmit- ter should be upstream from the flow measuring device. The Pressure sub-menu is the same no matter which computation or hardware selection you have previously selected.
  • Page 27 Lo press: Pressure value for the lowest analog input. (i.e. input at 4 mA = 10 PSIG) Hi press: Pressure value for the highest analog input. (i.e. input at 20 mA = 500 PSIG) Atmospheric pressure - Barometric: Value added to the input pressure to calculate the absolute pressure value.
  • Page 28 Graphical representation of the Temperature sub-menu Temperature input? At input = minimum Lo Temp? At input = maximum Hi Temp? Base reference Temperature? Temp alarm setpoint Lo alarm? Temp alarm setpoint Hi alarm? * These prompts do not appear if RTD (100 Ohm) is se- lected in hardware.
  • Page 29 Lo Temp: Temperature value for the lowest analog input. (i.e. input at 4 mA = 32 °F) Hi Temp: Temperature value for the highest analog input. (i.e. input at 20 mA = 1000 °F) Base reference Temperature: Temperature value at which the specific gravity reference value is measured.
  • Page 30 3.8.3a Digital Linear Input Settings Graphical representation of the Digital Linear sub-menu Flow input? Notes Pulses per unit vol. K factor? Gas compressibility. Z factor? Specific gravity Gravity? Thermal Expansion C (x 10E-6)? Mean Spec Heat? Cutoff: 0 to 40000 Hz Input filter? Flow alarm setpoint Lo alarm?
  • Page 31 3.8.3b Digital 16 Point Input Settings Graphical representation of the Digital 16 Point sub-menu Flow input? Notes Linearize 16 Point? Gas compressibility. Z factor? Specific gravity Gravity? Thermal Expansion C (x 10E-6)? Mean Spec Heat? Cutoff: 0 to 40000 Hz Input filter? Flow alarm setpoint Lo alarm?
  • Page 32 3.8.3c Analog Linear Input Settings Graphical representation of the Analog Linear sub-menu Flow input? Notes Gas compressibility. Z factor? Specific gravity Gravity? At input = minimum Lo flow? At input = maximum Hi flow? Low flow Cutoff? Thermal Expansion C (x 10E-6)? Mean Spec Heat? Flow alarm setpoint...
  • Page 33 3.8.3d Analog Orifice/Pitot Input Settings Graphical representation of the Analog Orifice/Pitot sub- menu Flow input? Notes Gas compressibility. Z factor? Specific gravity Gravity? Meter compensation factor (K1)? At input = minimum Delta P lo? At input = maximum Delta P hi? Low flow Cutoff? Thermal Expansion...
  • Page 34 3.8.3d Analog 16 Point Input Settings Graphical representation of the Analog 16 Point sub- menu Flow input? Notes Linearize 16 Point? Gas compressibility. Z factor? Specific gravity Gravity? At input = minimum Lo flow? At input = maximum Hi flow? Low flow Cutoff? Thermal Expansion...
  • Page 35 3.8.4 Definitions of Flow Parameters. K factor: Pulse per unit volume divider. For example if 100 pulses are input for 1 unit volume (i.e. cu.ft. or gal) a K factor of 100 will be used. Number of Pulses Display Value = K Factor Z factor: Compressibility factor of a gas.
  • Page 36 3.8.5 Setting the Flow Output Variables The Flow Output variables determine how the output sig- nals reflect the compensated flow. The Flow Output sub- menu is the same no matter which computation or hard- ware selection you have previously selected. Notes: It is not necessary to setup the Flow Output if it is not required.

  • Page 37: Clearing The Totalizer

    3.9 Clearing the Totalizer totalizer On the RUNNING side of cleared on either side of the menu, you have an- the menu, (Stand by or other opportunity to clear Running). The totalizer the totalizer: only accumulates while in the Running side of the DISPLAY PRESS menu.

  • Page 38: Checking The Alarm

    3.10 Checking the Alarm On the RUNNING side of If the alarm should go off the menu, you have another anytime during the Stand opportunity to check an by or Running modes of the alarm condition: Flow Computer, you can easily check which point has DISPLAY PRESS...

  • Page 39: Locking And Unlocking The Flow Computer

    3.11 Locking and Unlocking the Flow Computer Lock / Unlock is used to prevent unwanted changes in programming. Changes through the front panel or RS232 port cannot be made when the unit is locked. DISPLAY PRESS Run? Set Computations? Engineering Units? Continue Pressing A until Check Alarm? Lock/Unlock?
  • Page 40 After the lock has been established in the Flow Computer, and the operator tries to change one of the operating parameters, he will get the following message: **** Locked!! **** Push ENT to continue To UNLOCK the machine, repeat the process described above.

  • Page 41: Setting The Real Time Clock

    3.12 Setting the Real Time Clock The instrument has a real time clock/calendar that can be set from the front keypad. The time and date are saved upon power down. However, there is no battery back up in the Flow Computer to up- date the time and date during loss of power.
  • Page 42 After you have set the time, you should repeat the menu shown above, and set the date in the instrument. DISPLAY PRESS Run? Set Computations? Continue Pressing A until Check Alarm? Real time clock? Select item: Set Time? Select item: Set Date? Enter date: mo.da.yr ?

  • Page 43: Setting The Serial Interface

    3.13 Setting the Serial Interface Setting up the Serial Interface is only important if you have an RS-232 communication card option installed in the in- strument. The first thing that you are asked for is the unit identifica- tion number. You have a choice of identifying the unit with a unique whole number between 1 and 99.
  • Page 44 The next menu item is the Baud Rate. Graphical representation of the Baud Rate sub-menu Serial Interface: Baud Rate? Select Baud Rate 9600? Select Baud Rate 1200? Select Baud Rate 300? You have a choice of three Baud Rates. Note: The unit cannot be accessed through the front key- pad or via the Serial Port while data is being transmitted out from the unit.
  • Page 45 The option to activate the serial port is chosen next. This menu directly follows the Print Interval selection. DISPLAY PRESS Serial Interface: Print Interval? Serial Interface: On/Off Line? Graphical representation of the On/Off Line sub-menu Serial Interface: On/Off Line? On/Off Line Off? On/Off Line The option to print out alarm conditions automatically...

  • Page 46: Crossing Over From Setup To Running Mode

    3.14 Crossing Over From Setup to Running Mode Figure 3-4 shows the structure of the Running menu. Cross over from the Setup mode to the Running mode of the instrument, and review the top level menu. Running Activates live display of process Show Data? Running Used to enter the Standby mode for setting the variables...

  • Page 47: Setting Up The Data Display

    3.15 Show Data? This menu item will start the data list scrolling on the front of the LCD display. DISPLAY PRESS Run? Show Data? Set up list first! Push ENT to continue If you get the following, you have not set the display list of data, and should refer to Section 3.16.
  • Page 48 10. Uncompensated Volumetric flow rate Flow per minute 11. Raw Flow Raw flow input (Channel 3) (Value of Full Scale) 12. Raw Temperature Raw temperature input (Channel 1 or 2) (Value of Full Scale) 13. Raw Pressure Raw pressure input (Channel 2) (Value of Full Scale) 14.
  • Page 49 DISPLAY PRESS Run? Running . . . Show Data? Running . . . Go to Standby? Running . . . Setup data display? Select Item # 1 Time & Date? Each time the A key is pressed the variables change. These variables are listed above.

  • Page 50: Setting Up The Print List

    3.17 Setting up the Print List During normal operation, the instrument may be set up to periodically print out, through the RS232 port, the impor- tant operating data such as flow rate, temperature, or pressure. The same data that was available for display can be scanned and printed out the serial port of the in- strument.

  • Page 51: Print System Setup

    3.18 Print System Setup This feature is for use in documentation. When this menu item is selected, an entire print out of all the user defined parameters is sent out the RS232 port. DISPLAY PRESS Running . . . Show Data? Running .
  • Page 52 3.20 Examine Computations This feature is used to examine which computation has been selected. DISPLAY PRESS Running . . . Show Data? Continue Pressing A until Running . . . Examine Hardware? Running . . . Examine Comps? Once selected, use ENT key to return to Show Data? 3.21 Examine Variables This feature is used to examine the various parameters and constants that have been entered.

  • Page 53: Point Programming

    Chapter 4 4.0 16 Point Programming 4.1 General Information The 16 Point menu selection is used when the flow input device gives a non-linear input signal. The unit uses up to 16 different points, as entered by the operator, to form a curve for linearizing the input signal.

  • Page 54: Point Digital Setup

    4.2 16 Point Digital Setup Digital programming is quite simple if values of frequency and flow are known. The Flow Computer asks for 16 different frequencies and 16 corresponding K factors. It then uses this data to determine what the actual flow is for any given input frequency.
  • Page 55 Usually the necessary data is provided with the flowme- ter. If not, your flowmeter must be calibrated for use. This can be done by selecting Digital Linear in hardware and setting your K factor to 1 in variables. By making various system runs with calibrated measurements, the actual flow verses the frequency input can be determined and K factors derived.

  • Page 56: Point Analog Setup

    Freq03? 20.0000 K Factor03? 1.11111 Enter Point Freq04? Freq04? 30.0000 K Factor04? 1.017 Enter Point Freq05? Freq05? 100.0000 K Factor05? 1.000 Enter Point Freq06? 1000 Freq06? 1000.0000 K Factor06? 1.000 Note: Since the K factors for the last two points are one, any frequency higher than 1000 Hz will be modified by a K factor of 1.
  • Page 57 Programming begins as follows To get to the Variables menu . . . Display shows Press Run? Set Computations? Continually press A until . . . Set Variables? Pressure input? Temperature input? Flow input? Linearize 16 Point? The data would be entered as follows Enter Point Actual01? Actual01? 0.0000...

  • Page 58: Point Calculations

    4.4 16 Point Calculations The 16 Point routine uses the entered data to determine the K factor for any given input frequency or input flow signal. This is done by taking the closest data points above and below the input signal, then using those points to extrapolate the K factor, then calculating the uncom- pensated flow from the data.

  • Page 59: General Specifications

    Chapter 5 5.0 General Specifications 5.01 Environmental Operating Temperature: 32 to 122 F (0 to 50 C) Storage Temperature: -10 to 160 F (-23 to 71 C) Humidity: 0 to 90% Non-condensing Front Bezel: NEMA 4X Case: ABS Plastic Dimensions: See page 5-7 5.02 Input Power Voltage: 115 or 230 VAC ±15% (Switch Selectable)
  • Page 60 Typical Current Input Schematic Voltage Input Input Impedance: 100KΩ Range: 0-5V, 0-10V ±0.024% FS Resolution: Typical Voltage Input Schematic 5.12 RTD Temperature Inputs Compatible RTD type: 100Ω Platinum (a = 0.00385: DIN 43-760 Calibration) Suitable for use with: 2, 3 or 4 wire RTD's Excitation Current: 2mA typical Max Fault Current:...
  • Page 61 Typical RTD Input Schematic 2 mA Excitation Current Output 20 KΩ 1.5 uF ˜˜ A/D 20 KΩ 1.5 uF 100 KΩ 5.13 Digital Flow Input: Number: 1 (Flow only) Range: 3-30 VDC Pulse Sensor Types: Dry contact, opto-isolated or voltage source Max Input Frequency: 40kHz max Min pulse width:...

  • Page 62: Output Specifications

    5.2 Output Specifications 5.21 Analog Outputs Number: Range: 4-20mA DC, sink only Compliance Voltage Range: 3.0-24 VDC Load Type: Non Inductive Accuracy: +/- 0.5% FS Update Rate: Analog Output Schematic ˜A/D 100Ω 5.22 Digital Flow Pulse Output This output is intended to drive a counter with a minimum input impedance of 1000Ω.
  • Page 63 Output Frequency Range: 0 to 50KHz Max Output Slew Rate: 27 Volts/µsec Sustained Fault Voltage for no permanent damage: 7 Volts Transient Protection: 1500V 50µsec Pulse Output Schematic 5.23 Relay Outputs One relay is provided as a combination hi/lo flow alarm output and a second is provided for alarm conditions.

  • Page 64: Rs232 Communications Port

    5.24 Auxiliary Power Output Voltage: 24VDC regulated and filtered Isolation: 230VAC max Current: 0 to 100mA Protection: Short Circuit Proof 5.3 RS232 Communications Port (See Section 8 for more information on RS232 Option.) Connector: 25 Pin Female (DB25S) Input Impedance: 3000Ω...
  • Page 65 3.10 Checking the Alarm On the RUNNING side of If the alarm should go off the menu, you have another anytime during the Stand opportunity to check an by or Running modes of the alarm condition: Flow Computer, you can easily check which point has DISPLAY PRESS...

  • Page 66: Principles Of Operation

    Chapter 6.0 6.0 Principles of Operation 6.1 General: This chapter explains in detail how the instrument calcu- lates mass flow based on specific data input. Each parameter is updated at a 2Hz rate. Therefore, all references to the machine’s “interval” in the following de- scriptions indicate a period of 0.5 seconds.
  • Page 67 3.8.5 Setting the Flow Output Variables The Flow Output variables determine how the output sig- nals reflect the compensated flow. The Flow Output sub- menu is the same no matter which computation or hard- ware selection you have previously selected. Notes: It is not necessary to setup the Flow Output if it is not required.

  • Page 68: Flow Calculations

    Input Calculations Temperature: temp lo + [(temp hi - temp lo) x (%)] = Tf Pressure: press lo + [(press hi - press lo) x (%)] = Pf Analog-Orifice/Pitot: Delta P lo + [(Delta P hi - Delta P lo) x (%)] = DP DENSITY CALCULATIONS Density-Liquid (liquid volume eq): SG x DENSITY H...

  • Page 69: K1 Factor Calculation

    CORRECTED VOLUME FLOW CALCULATIONS Gas English: (PSIA/14.696) x (519.67/TEMP+459.67) x (1/Z) x UCFLOW = VOL Where reference conditions = 60°F, 14.696 PSIA Gas Metric: (KPa/101.329) x (273.15/TEMP+273.15) x (1/Z) x UCFLOW = VOL Where reference conditions = 0°C, 101.325 KPA Liquid: UCFLOW x [1-C x (Tf - Tref)]= VOL MASS FLOW CALCULATIONS...
  • Page 70 FORMULAS: GAS: English K1 = ACFM x sqrt[ (SG x PSIA) / (Z x T x inH O) ] K1 = SCFM x 0.028279 x sqrt[SG x (459.67 + °F) x Z / (PSIA x inH K1 = PPM x 0.370532 x sqrt[(459.67 + °F) x Z / SG x PSIA x inH Metric K1 = (NM /h) x (0.3123483) x sqrt[(SG x Z x T) / (Kpa x mmH...
  • Page 71 CALCULATING THE C FACTOR: (Coefficient of Expansion) The liquid density is a function of the flowing temperature for many fluids. This unit solves an equation which represents this physical property of the fluid. The information which the unit uses to describe the fluid is entered by the user in the following variables: Reference Temperature, Reference Specific Gravity, Expansion Coefficient This information is available for many fluids in one or more of the following...

  • Page 72: Trouble Shooting Guide

    Chapter 7.0 Trouble Shooting Guide 7.1 Operator Forgets Security Lockout Code If the authorized programmer of the instrument forgets the security code for the instrument and is locked out, follow this procedure: A. Scroll through the menu to the Lock/Unlock menu. Press the ENT key.
  • Page 73 7.2 Pulse Inputs are not Counting on the Instru- ment A. Check the voltage of the pulses. They must be between 3-30V, and not less than 3 V or negative. B. Check pulse width. Pulse width of the signal must be consistent with the filter that you have selected.
  • Page 74 CHAPTER 8 RS-232 OPERATING INSTRUCTIONS CHAPTER CONTENTS PAGE NUMBER: GENERAL ............. 8-2 Setting Up the RS-232 Link ......8-2 Line Oriented Data Input ....... 8-3 Parser ............... 8-3 Line Editing ............. 8-4 Protocol ............8-4 Getting Started ..........8-4 COMMAND CATEGORIES ......... 8-5 SET Command ..........

  • Page 75: General

    RS-232 OPERATING INSTRUCTIONS GENERAL This chapter summarizes operation of the MASS FLOW COMPUTER (922-MFC) with a remote terminal. It is recommended that you read the preceding chapters of the Operating Instructions. You should be familiar with the format and methods used in setting up the basic instru- ment before using the RS-232 communication option.

  • Page 76: Line Oriented Data Input

    Printer Usage with the Flow Computer The Flow Computer may be connected to a printer in or- der to provide data logging reports and equipment setup reports. It is required to use a printer with a RS-232 connection. In addition, the printer must have a 2KB buffer (min.). The printer must be compatible with the flow computers available baud rates of 300, 1200, or 9600 baud.

  • Page 77: Parser

    Parser Because so much information must be typed to communi- cate with the instrument, a sophisticated parser has been included to facilitate this data entry. You will find that it is very forgiving of typing mistakes. This is because when you type in a command, the parser finds the closest match between what you have typed and the keywords stored in its memory.

  • Page 78: Command Categories

    be transferring data between your terminal and the in- strument. You have a choice of 300, 1200, or 9600 baud. The second thing is to select the instrument identification (All of these are outlined in section 4.12). On initial power up, the instrument default conditions are 9600 baud and Device No.

  • Page 79: Set Command

    SET COMMAND: SET COMMANDS allow functions to be set remotely. SET COMMANDS: SET COMPUTATIONS - Sets the computations that will be used for Volume, Mass or Heat Flow. SET UNITS - Sets engineering units of the instrument to English or Metric. SET HARDWARE - Sets specific hardware parameters of the instrument.
  • Page 80 SET COMPUTATIONS: Reference: See Section 3.5 Format: SET COMPUTATIONS [text] (CR) Function: Computation units set depending on text string: REQUIRED TEXT VOLUME (Ideal Gas - Volume) MASS (Ideal Gas - Mass) STEAM (Steam Tables - Mass) LIQMASS (Liquids - Mass) LIQVOL (Liquids - Volume) HEATGAS...
  • Page 81 SET HARDWARE: Reference: See Section 3.7 Format: SET HARDWARE [TEXT] (CR) Function: The SET HARDWARE command parallels the Hardware Setup menu. The user may configure the input hardware using this command. The command consists of the word SET HARDWARE, fol- lowed by the word FLOW, TEMPERATURE or PRES- SURE, and then by the input characteristics desired.

  • Page 82: Specific Parameter Set Commands

    SPECIFIC PARAMETER SET COMMANDS Function: The SET command can also be used to set miscellaneous parameters in the instrument. With a SET command, a numerical argument must follow. USING THE SET COMMAND: If you are trying to set one of the instrument's preset variables, the instrument will parse the phrase following the word SET to find the specific preset variable you wish to access.
  • Page 83 After each successfully parsed phrase, the instrument will immediately show the variable that has been changed and the new value it has been set to. If a phrase cannot be understood or is ambiguous, the instrument will give you an error message. For example: SET flow temperature to 12 (CR) The instrument will not understand this command, and will give you a “Syntax Error”...
  • Page 84 REQUIRED WORDS: OPTIONAL WORDS: SET pressure low scale input SET pressure high scale input SET barometric pressure SET pressure low alarm SET pressure high alarm SET k factor SET k1 factor SET z factor SET gravity specific SET c factor SET specific heat SET point This command is followed by three numbers.
  • Page 85 SET TIME: Reference: See Section 4-11 in Operator Manual. Format: SET TIME [hh:mm] (CR) Function: Sets the Real time clock in the instrument to time (hh:mm) where: hh indicates hours (00-23) mm indicates minutes (00-59) NOTE: 24 hour format must be used. Example: SET TIME 12:42 (CR)
  • Page 86 SET ID: Reference: See Section 4-12 in Operator Manual. Format: SET ID (nn) (CR) Where nn is a number from 1-99. Function: Sets the device ID of the instrument to the number nn specified. If different from the current ID, the instrument is immediately deselected.
  • Page 87 SET BAUD: Reference: See Section 3.13 Format: SET BAUD [nnnn] (CR) Function: Sets the baud rate to the value specified in nnnn. nnnn may be 300, 1200, or 9600. The baud rate is immediately set to the value specified. Remember: 300 Baud may cause undesirable delays in communication.
  • Page 88 SET LIST: Reference: See Section 3.16 Format: SET LIST n n n n (CR) Where n is the number of an item on the display list. Function: The SET LIST command is used to set up a display list which can be periodically printed at a remote terminal or printer.

  • Page 89: Examine Command

    Then when the instrument is running and the PRINT INTER- VAL is greater than 0.24999 minutes, the instrument will show: 11:55:52 Monday January 11, 1988 Flow rate 10.000 SCFM Totalizer 1245.000 cu-ft Pressure 12.000 PSIG EXAMINE COMMAND Reference: See Section 3.19 to 3.21 Function: The EXAMINE commands are used to exam- ine setup information about the instrument.
  • Page 90 REQUIRED WORDS: OPTIONAL WORDS: EXAMINE temperature low scale input EXAMINE temperature high scale input EXAMINE reference temperature EXAMINE temperature low alarm EXAMINE temperature high alarm EXAMINE temperature two low scale input EXAMINE temperature two high scale input EXAMINE temperature two low alarm EXAMINE temperature two high alarm EXAMINE pressure low scale input...

  • Page 91: Run Command

    EXAMINE ALARM EXAMINEs current Alarm condition. EXAMINE TIME EXAMINEs real time clocks time and date. EXAMINE DATE EXAMINEs real time clocks time and date. EXAMINE SERIAL EXAMINEs the setting of the instrument for ID number, Baud Rate, and Print Interval. EXAMINE EXCEPTION EXAMINEs if Exception Reporting is turned ON or OFF EXAMINE RESULTS...

  • Page 92: Stop Command

    STOP COMMAND Reference: See Section 3.14 Function: Stops the instrument from running. Display reads: Run? Optionally "STANDBY" may be used in the same capacity. Example: STOP (CR) CLEAR COMMAND Reference: See Sections 3.9 and 3.10 Function: Clears Alarms or Clears Totalizers. This command consists of two words, the first being CLEAR and the second being either TOTALIZER or ALARM.

  • Page 93: Sysdump Command

    continued from previous page . . . The instrument is unlocked by supplying the same 5 digit lock code used to lock the instrument. If the 5 digit code is unknown, use UNLOCK 00000 and the instrument will give a call in code which the factory can decode into an appropriate, one time usable, unlock code (See Section 7.1 of Operator Manual.).
  • Page 94 Appendix i Operating Parameters Pressure Input Parameters Parameter Default English Metric (KPa) Metric (Kg/cm Metric (bars) Notes Low Pressure PSIG Kg/cm High Pressure PSIG Kg/cm Bar. Pressure 14.696 PSIA Kg/cm Low alarm PSIG Kg/cm Hi alarm 25000 PSIG Kg/cm Temperature Input Parameters Parameter Default English...
  • Page 95 Flow Input Parameters - Steam Mass Parameter Default English Metric (KPa) Metric (Kg/cm2) Metric (bars) Notes K factor null Pulses/ft Pulses/M Pulses/M Pulses/M digital Input filter 40000.0 Hertz Hertz Hertz Hertz digital K1 Factor null As Needed As Needed As Needed As Needed orifice/pitot Delta P Lo...
  • Page 96 Appendix i (continued) Operating Parameters Flow Input Parameters - Heat-Gas Parameter Default English Metric (KPa) Metric (Kg/cm2) Metric (bars) Notes K factor null Pulses/ft Pulses/M Pulses/M Pulses/M digital Input filter 40000.0 Hertz Hertz Hertz Hertz digital K1 Factor null As Needed As Needed As Needed As Needed...
  • Page 97 Flow Input Parameters - Heat-Liquid Parameter Default English Metric (KPa) Metric (Kg/cm2) Metric (bars) Notes K factor null Pulses/gal. Pulses/liter Pulses/liter Pulses/liter digital Input filter 40000.0 Hertz Hertz Hertz Hertz digital K1 Factor null As Needed As Needed As Needed As Needed orifice/pitot Delta P Lo...
  • Page 98 Appendix ii CONVERSION TABLE: Convert From: ENGLISH x (CONVERSION FACTOR) = METRIC /min x 1.69902 x 0.063085 = liters/sec lbm/h x 0.45359 = kg/h Btu/h x 0.0002928 = kW Btu/h x 0.252 = kcal/h Btu/h x 0.001055056 = MJ/h x 0.028317 gals x 3.785109 = liters...
  • Page 99 Appendix iii Programming Error Messages Note: All Error messages are followed by the phrase: "Push ENT to continue". These messages occur when attempting to go to the run- ning mode without entering necessary information or entering a value that is not allowed. Messages Temp hi-lo lim err: Temperature input parameters have not...
  • Page 100 Appendix iv Alarm Messages Note: All Alarm messages are followed by the phrase: "Press ENT to quiet". This will clear the alarm relay. It does not correct alarm conditions. If the alarm condition is still present, the alarm relay will pull in again. Messages PRESS TOO LOW: Gauge pressure has gone below the Lo...
  • Page 101 Ordering Information Example: 922-MFC A Series: 922-MFC Operating Voltage: A: 115 VAC ± 15% at 50/60Hz B: 230 VAC ± 15% at 50/60Hz C: 24 VDC ± 20% D: 12 VDC -10, +20% Options: 1: RS-232 Serial Interface Display: BL: Backlit Display (standard)
  • Page 102 Buyer. The Warranty is limited to repair or replacement of the defec- tive unit at the option of Flowmetrics, Inc. This Warranty is void if the product has been altered, misused, dismantled, or otherwise abused.

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