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Intra Automation digiflow 515 Installation And Operating Manual

Gas- and steam- flow computer
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Installation Instruction / Operating Manual
INTRA-AUTOMATION GmbH
Meß- und Regelinstrumente
Otto-Hahn-Straße 20
41515 Grevenbroich
Tel.:
(49) 21 81/6 87 61
Fax:
(49) 21 81/6 44 92
eMail: INTRA-Automation@T-Online.de
Dok.: df15_bae.doc\ Rev. 2.2 \ 26.11.97\had
DigiFlow 515
Softwareversion: 2.0 and up

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  • Page 1 Installation Instruction / Operating Manual DigiFlow 515 Softwareversion: 2.0 and up INTRA-AUTOMATION GmbH Meß- und Regelinstrumente Otto-Hahn-Straße 20 41515 Grevenbroich Tel.: (49) 21 81/6 87 61 Fax: (49) 21 81/6 44 92 eMail: INTRA-Automation@T-Online.de Dok.: df15_bae.doc\ Rev. 2.2 \ 26.11.97\had...

  • Page 3: Table Of Contents

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual Directory 1 INTRODUCTION....................................5 2 ORDERING DETAILS ..................................6 3 TECHNICAL DATA ..................................6 4 ALGORITHMS....................................8 5 OPERATION.......................................9 5.1 F ......................................9 RONT VIEW 5.2 G ......................................9 ENERAL 6 APPLICATION....................................10 6.1 T ........................10 AS GAS COMPENSATION CALCULATOR 6.1.1 Parameter setting of the flow calculator: ..........................12...

  • Page 4: Gas- And Steam Flowcomputer Digiflow

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual Note. The information in this document can be changed without previous announcement. These instructions do not claim to cover all details or variations in equipment, nor to provide for every possible contin- gency that may arise during installation, operation or maintenance.

  • Page 5: Introduction

    Operating Manual 1 Introduction The DigiFlow 515 combines compensation for gas and vapors to the following equations: 1. Ideal Gas: Temperature and pressure correction, compressibility correction not required. 2. General Gas: Temperature and pressure correction with compressibility correction calculated using the Redlich-Kwong state equation.

  • Page 6: Ordering Details

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 2 Ordering details Option or Feature Code Gas- and Steam Flow Computer, Type: DigiFlow 515 Code Housing Panel mounting IP54 (Standard) Panel mounting with lockable transparent door IP55 Code Power Supply 230 V AC mains (Standard)
  • Page 7 Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual Analog Input 4 – 20 mA: Inputs: 2 for flow (split range), 1 for pressure, and 1 for temperature, for flow correction, or 2 for flow (split range) and 2 for pressure for energy–balance.

  • Page 8: Algorithms

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual Options Analog Outputs: Function: Selectable: Output current proportional to standard display or of other Parameter See Table on Page 35. Setpoints at 4 mA and 20 mA, linear interpolation between. Output Span: 0 –...

  • Page 9: Operation

    CURSOR ENTER 5.2 General The DigiFlow 515 work with a CMOS microprocessor that processes all measurements and takes all control- ling functions. All operation parameters and rake constant are programmable and get in a nonvolatile memory filed which keeps the information after energy loss for at least 40 years.

  • Page 10: Application

    This chapter is only of meaning for flow measurings at gases. If the flow medium is steam, you can change for chapter 5.2 on page 16 at once. The flow calculator DigiFlow 515 process the input signals of a wide range of flowmeters by the equations defined below.
  • Page 11 Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual Volumetric Flowmeters with 4–20mA Output. (e.g. VORTEX, turbine or PDF with Analog output) ⋅ ⋅ ⋅ ⋅ ρ ⋅ Differential Pressure Flowmeters With 4–20mA Output And a Square Law Relationship. (e.g. Orifice Plates, ITABAR-Probes, Pitot Tubes, etc.) ⋅...

  • Page 12: Parameter Setting Of The Flow Calculator

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual Example No. 1: With an orifice plate the flow shall be measured in the range of 0-2,000 m /h, what to a Measuring range rela- tionship of 10:1 corresponds. The two transmitters are spanned as follows:...

  • Page 13: Application For Ideals Gases

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual Example No. 2: A flowmeter produced a mass flow of 1,000kg/h. Temperature of 30°C, pressure of 220kPa and specific Gravity of 1.52. Using equation [2] gets: ⋅ ⋅ 3 4834 152 220 ρ...

  • Page 14: Application For General Gases

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual Scaling Factor (k- 9,500 Pulses/m Factor): Specific Gravity d: 1.105 Base Temperature: 15°C Base Pressure: 101.325 kPa Time Base: hours Other parameters can be programmed as required. The instrument will now display the corrected volume and mass flowrates of the gas.

  • Page 15: Natural Gas

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 6.1.4 Natural Gas For natural gas of low caloric value the compressibility factor is calculated using the AGA-NX-19-mod equa- tion. These factors are used with equations 4 to 8. To calculate this compressibility factor following paramerters are to be entered in consideration of their limita- tions.

  • Page 16: The Digiflow 515 For The Steaming Quantity Measuring

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 6.2 The DigiFlow 515 for the steaming quantity measuring The DigiFlow 515 incorporates equations to calculate flows of water , satirized steam and superheated steam over the following range: Pressure: 0kPa bis 100,000kPa (0 psia to 14,513.8 psia)

  • Page 17: The Digiflow 515 As Heat Consumption Calculator

    6.3 The DigiFlow 515 as heat consumption calculator If the DigiFlow 515 is uded as heat consumption calculator, it will be presumed a mass continuity in a closed loop, that means the quantity of the pouring out medium is the same as streaming in. Therefore ,in this case, the factor ‘h’...

  • Page 18: Programming The Flow Computer

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 6.3.1 Programming The Flow Computer So that the flow calculating machine can determine the exact flow according to equations 11 to 18, a number of parameters have to be entered: k-Factor (Flow Meters with Frequency Output) Span (for Analog Outputs) υ...

  • Page 19: Filtering Of The Flow Input

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 6.4 Filtering of The Flow Input Reading the instantaneous measurand correctly often is impossible because of the frequency fluctuations or output current fluctuations of the flow measuring instrument created by the pulsating flow.

  • Page 20: Correction Of The Nonlinearity

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 6.5 Correction of The Nonlinearity 6.5.1 Correction for the frequency input Known nonlinearities of a flow measuring instrument can be corrected. 12 frequencies and scale factors are available to this. Data on the flowmeter non-linearity can usually be sup- plied by the flowmeter manufacturer in the form of a Calibration Certificate, and is the result of individual tests on flowmeter over a range of flowrates.

  • Page 21: Programming And Parameter Setting

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 7 Programming and parameter setting 7.1 Key description The keys on the front panel of the set have the following functions: Pict. Name Function at normal operation Function at parameter setting TOTAL Change between sums and instant Presets at digit input the actual digit to '0'.

  • Page 22: Menu Tables

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 8 Menu tables Main Menu Main Menu Base Setup Mediumparams Flowparams Signal Check Options [Factory setting] Leave =protected by special password Base Setup Base Setup Adjust Displaycontrast Set Clock Adjust Uext Pulse Resolution (1.0 - 0.000001 * Unit)

  • Page 23: Medium Parameters

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual Medium Parameters Medium Parameters Gastype Steam Real Gas Ideal Gas Natural Gas Saturized Superheated Crit. Press. Specific Gravity Input Crit. Temp. mol% N (Press. Temp.) Specific Gravity mol% CO Meas. Unit Energy Flow...

  • Page 24: Flow Parameters

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual Flow Parameters Flow Parameters Flow Inputsignal Analog Frequency Differential Volumetric Linear Non Linear Flow Correction k-Factor Inp. Supp. P. Non Linear Linear Square Root Inp. Sup. P. Number of Sensors 1 Sensor 2 Sensor Function 2.

  • Page 25: Options

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual Options Options Language (German, English, French) Unit (SI, US) Front_Reset Enable Disable Reset now? (Yes, No) Cntr. Pulse Dur. (10 .. 90 ms) Total Units (*1, *1000) Output Span (0 - 20mA, 4 - 20mA) Communic.

  • Page 26: Input Circuits

    Operating Manual 9 Input circuits The DigiFlow 515 have an adjustable supply voltage for transmitters. This voltage can be adjusted in a range of approx. 17.5 -- 19.5V during configuration. A maximum output current of 100mA is allowed. Of the rear side is a DIP switch accessibly. If the flow signal is a frequency signal, the signal type must here be defined.
  • Page 27 Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual PDM * ) with reed switch e.g..: Fig. 3: Input signal Type 'B' (reed switch) e.g.: mV signal of turbine flow meter use shielded cable! Fig. 4: Input signal Type 'C' coil or tacho generator e.g.:...

  • Page 28: Analog Inputs

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 9.2 Analog inputs The flow calculator DigiFlow 515 can be operated with temperature input of Pt100 RTD or with 4-20mA tem- perature analog current input. 9.2.1 Input of Pt100 RTD A possibility to measure temperature very exactly offers the four wire Pt100 RTD measurement. (use shielded wire).
  • Page 29 Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual DigiFlow 515 18 V transmitter supply ∆ ∆ Ω Ω Ω Ω Fig. 8: Internal tranmitter supply 12 - 24 V DC DigiFlow 515 ∆ ∆ Ω Ω Ω Ω Fig. 9: External transmitter supply Two transmitters for differential pressure as well as respectively one transmitter for pressure and for tempera- ture are connected as displayed in Fig.

  • Page 30: Remote Switched Functions

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 9.3 Remote switched functions The DigiFlow 515 has the ability to reset the sums and to switch the display, by remote keys. The connection of that keys are displayed in Fig. 10. RESET DISPLAY-switch 16...30V DC...

  • Page 31: Output Circuits

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 10 Output circuits 10.1 Digital output An output pulse can be taken from the terminal strip at the rear side to operate of external counters. At every increase of a selectable decade of the sum counter a pulse count corresponding to this increase gets gener- ated.

  • Page 32: Relay Output

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 10.2 Relay output The calculator is equipped with two relays (SPST) per default. These are preset during configuration to ener- gisw when the default flowrate exceeds (Alarm ) or drops below (Alarm ) the preset value.

  • Page 33: Communication Protocol

    Operating Manual 10.3.2 Communication Protocol The DigiFlow 515 has a build in real time clock. This enables the time and date to be set and printed on tick- ets. Make sure you that the clock keeps its setting at loss of the energy only for about 5 days. After then the clock may need to be set.

  • Page 34: Network Communications

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 10.3.5 Network communications During the network communications several sets are connected about a twisted pair cable and mentioned about addresses. Up to 32 instruments can be connected to a common bus using the RS485 interface. Every set gets its own address about which it can be mentioned by the control computers, e.g.

  • Page 35: Options

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 11 Options 11.1 Analog output The 0/4-20mA output option provides an scaled analog output to one of the listed parameters below: Computer function: Selectable parameter: Gas flow correction Volume flow, mass flow, temperature, pressure, (Kompressibilitly factor z...

  • Page 36: Control Of A Sensor-Purge-Unit

    11.2 Control of a Sensor–Purge–Unit The DigiFlow 515 takes about this option the time control of the solenoid valves of a Sensor–Purge–Unit. This serves the freeing of the drillings of the ITABAR-open flow probes, which slowly lean on themselves in a polluted medium, by means of compressed air.

  • Page 37: Installation

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 12 Installation 12.1 General The standard version of the calculating machine is supplied as panel mounting set (144 X 77 mm 5.7" X 3.03"). The cutoff in this panel must be 137mm wide (5.4") and 67 mm (2.6") high. The depth is 130 mm (5.1").The set ist fastened with the supplied mounting clamps.
  • Page 38 Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual clamp Function Pt100 no. 2 negative pole Frequency input no. 1 positive pole Frequency input no. 2 positive pole External sums reset, positive pole External display switchover, positive pole GND for clamps 13 - 16...

  • Page 39: Block Diagram

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 13 Block Diagram display and keyboard 18V ext/int. int. max. 75mA INPUTS buzzer max. 30VDC INPUTS 0...20mA or 4...20mA and digital Pt100 input comm AMUX OUTPUTS EEPROM max. 30VDC/50mA ADC 13bit max. 250VAC/5A...

  • Page 40: Appendix A Error Descriptions

    Operating Manual 14 Appendix A Error descriptions In case of errors the display of the DigiFlow 515 toggles between normal display and error display in Fre- quency of 1 s. The beeper sounds alternately. The beeper can be stopped by pressing the ENTER-key during on change to error display. The beeper is then quiet until a new error condition occures.

  • Page 41: Appendix B Properties Of Some Gases

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 15 Appendix B Properties of Some Gases: Crit. Press. [ [ [ [ Formular Specific Crit. Temp. Crit. Temp. Crit. Press. °C] ] ] ] °F] ] ] ] [ [ [ [ kPa] ] ] ]...

  • Page 42: Appendix C Applications (Examples)

    Gas- and Steam Flowcomputer DigiFlow 515 Operating Manual 16 Appendix C Applications (Examples)
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