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Dresser IMCW2 Manual

Measurement micro corrector user terminal software
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Dresser™ Measurement
Micro Corrector Model IMCW2
User Terminal Software (MCUT) Manual
© 2022 Natural Gas Solutions North America, LLC – All Rights Reserved.

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Summary of Contents for Dresser IMCW2

  • Page 1 Dresser™ Measurement Micro Corrector Model IMCW2 User Terminal Software (MCUT) Manual © 2022 Natural Gas Solutions North America, LLC – All Rights Reserved.

  • Page 2: Table Of Contents

    Dresser Measurement IMCW2 User Terminal Software Manual Contents 1 Information ..........................5 2 General Overview ........................6 3 Safety ............................7 4 Installation and Getting Started ....................8 System Requirements ........................... 8 Required Equipment ..........................8 Installation ............................9 Operating MCUT ..........................11 Starting MCUT .............................
  • Page 3 Dresser Measurement IMCW2 User Terminal Software Manual Monitor Pressure Calibration ......................93 8 Live Data Tab .......................... 94 9 Faults & Alarms Tab ........................ 96 Faults Functionality ..........................96 Clear Occurred Faults.......................... 98 Clear Uncorrected Volume Under Fault ................... 100 Fault Dialout Settings ........................
  • Page 4 13.5.6 Corrector functionality if new digital transducer is NOT commissioned 14 Battery Replacement ......................161 14.1 Installed battery pack Information ....................162 14.2 IMCW2 is configured with Alkaline Battery Pack ................163 14.3 IMCW2 is configured with Lithium Battery Pack ................164 15 Meter Health Diagnostics ...................... 167 15.1 DP Daily Logging..........................

  • Page 5: Information

    In addition, the term telemetry output pulse should be read as meaning pulse output. In the case of the IMCW2 T-Only and when a fixed line pressure is applied, the corrected and uncorrected volumes should be read as meaning compensated and uncompensated.

  • Page 6: General Overview

    The IMCW2 is designed to install directly on to all Dresser rotary meters as well as rotary meters of other manufacturers (contact your Dresser Representative for further details). Volume is sensed from the rotation of the impellers via a magnetic pickup, therefore the input signal to the electronic counter and volume corrector is of high resolution.

  • Page 7: Safety

    The serial port may only be connected to an intrinsically safe modem as shown by the safety system approval drawing (062308-000 in the Dresser IMCW2 Hardware Manual). For commissioning and reading data the serial port may also be connected to a laptop computer under the following conditions: 1.

  • Page 8: Installation And Getting Started

    Dresser Measurement IMCW2 User Terminal Software Manual Installation and Getting Started 4.1 System Requirements The MCUT is designed to run on Microsoft Windows® based PCs. 4.2 Required Equipment The following equipment is needed to connect your computer to the Micro Corrector.

  • Page 9: Installation

    Dresser Measurement IMCW2 User Terminal Software Manual 4.3 Installation The MCUT software is supplied by your Dresser Representative either as a downloadable link or through physical media. Insert/download the MCUT software installation onto your PC or laptop. If the auto run facility is enabled on the PC, the set-up program will start automatically.
  • Page 10 Dresser Measurement IMCW2 User Terminal Software Manual © 2022 Natural Gas Solutions North America, LLC Page 10 of 179...

  • Page 11: Operating Mcut

    Communications to the IMCW2 can be carried out either directly or remotely. An intrinsically safe barrier must be installed between a PC in a non-hazardous area and the IMCW2 in the hazardous area. The procedures contained in this manual are identical regardless of whether communications to the IMCW2 are carried out directly or remotely via the modem, however the operator will be prompted to enter some additional details if remote communications are to be established.

  • Page 12: Starting Mcut

    Dresser Measurement IMCW2 User Terminal Software Manual 4.5 Starting MCUT (Micro Corrector User Terminal) To start the MCUT:  Note: Completion of the installation process will have placed an icon onto your Windows® desktop. 1. Locate and double-click the icon created on the desktop. Alternatively select the MC UT icon from the Micro Series User Terminal folder in the Start, Programs menu.

  • Page 13: Welcome Tab

    Dresser Measurement IMCW2 User Terminal Software Manual Welcome Tab The software version and release date of the user terminal is displayed on the Welcome tab. Welcome Screen  Note: The Software Revision is required if customer support is requested. © 2022 Natural Gas Solutions North America, LLC...
  • Page 14 The View Release Notes button will bring up a window which states a summary of changes in the current revision. To connect to the IMCW2 it is necessary to select the Configuration tab to display the Configuration Screen. © 2022 Natural Gas Solutions North America, LLC...

  • Page 15: Configuration Tab

    Upon initial call up of this screen (which must be done every time the MCUT is run) it is necessary to establish communication with the IMCW2 so that the current settings stored within the IMCW2 are displayed in the MCUT.

  • Page 16: Connect To The Micro Corrector

    PC; connect the round connector to the serial port connector located in the right-hand corner on the bottom of the IMCW2. If COM port 1 is not available, it is possible to specify which COM port is to be used within the MCUT for direct communication (COM 1 to COM 255).
  • Page 17 Dresser Measurement IMCW2 User Terminal Software Manual Once the download is complete a dialog will be displayed stating that Configuration Downloaded OK, select OK. A status bar will display the connection progress. The “Connect with MC” button will change to “Cancel Connection” during the connection time and you can abort the operation by pressing this button.

  • Page 18: Ut Comms Settings

    Communications to the IMCW2 may be conducted directly or remotely, via modem.  Note: For details on setting-up and communicating via a modem contact your Dresser representative. 1. Select the UT Comms Settings option. The UT Comms Settings dialog will be displayed.
  • Page 19 Additionally, the user may select a fixed baud rate for direct communications.  Note: For details on setting-up and communicating via a modem contact your Dresser representative. UT communication settings Screen To specify the communications port for in the MCUT: •...
  • Page 20 Dresser Measurement IMCW2 User Terminal Software Manual To specify the communications port for use in the MCUT: 2. In the Direct section select the Com Port drop down selection box. Select the appropriate COM port (that which the communications cable is connected to), default is COM 1.
  • Page 21 Dresser Measurement IMCW2 User Terminal Software Manual Follow the following procedure to find out Com Port assignation. • Open Control Panel • Select System • Select Hardware • Select Device Manager • Check Ports (COM & LPT) to find out Com Port assignation for USB serial port adaptor.
  • Page 22 Dresser Measurement IMCW2 User Terminal Software Manual © 2022 Natural Gas Solutions North America, LLC Page 22 of 179...

  • Page 23: Volume Configuration

    • Meter Data – enables the operator to specify the type and size of meter that the IMCW2 is assembled to. Additionally, the operator is able to allocate a Meter/Site ID to each specific IMCW2. This field can be a combination of 16 alpha-numeric characters however, special characters not recognized in Microsoft™...
  • Page 24 Dresser Measurement IMCW2 User Terminal Software Manual Volume Configuration Screen © 2022 Natural Gas Solutions North America, LLC Page 24 of 179...

  • Page 25: Meter Data

    Type and Size are selected from the appropriate drop-down selection boxes, these details should reflect the meter type and size that the IMCW2 is fitted to. If the meter configuration required is not shown in the drop-down selection boxes, the Manual option from within the Size drop down selection box should be selected.
  • Page 26 Dresser Measurement IMCW2 User Terminal Software Manual To set the meter type: • In the Meter Data section select the Type drop down selection box and select the desired option. The new value will be highlighted yellow. • Select the OK option on the Volume Configuration screen.
  • Page 27 Dresser Measurement IMCW2 User Terminal Software Manual • The Configuration screen will be displayed, and any changed parameters will be highlighted in yellow in the parameters selection list. © 2022 Natural Gas Solutions North America, LLC Page 27 of 179...
  • Page 28 Dresser Measurement IMCW2 User Terminal Software Manual To set the meter size: • In the Meter Data section select the Size drop down selection box and select the desired option. The new value will be highlighted yellow. • Select the OK option on the Volume Configuration screen.
  • Page 29 Dresser Measurement IMCW2 User Terminal Software Manual To set the Meter/Site ID: • In the Meter Data section select the Meter/Site ID text box and enter the desired Meter/Site ID reference. • Maximum of 16 alphanumeric characters including spaces. •...

  • Page 30: Volumes

    6.0.0.0. A maximum of 11 digits can be entered for firmware version 6.0.0.0 and higher.  Note: The LCD of the IMCW2 can only display a maximum of 8 digits; the value that is to be displayed on the LCD is shown in the Display section of the Volume Configuration dialog •...

  • Page 31: Flow Sense

    6.3.3 Flow Sense The IMCW2 measures the flow from the meter via a magnetic pickup which is installed inside the mag well of the meter. The Flow section on the Volume Configuration screen contains a drop-down selection labeled Flow Sense. In this drop-down selection box, the user can specify which flow sense is identified as the positive and negative flow, along with how the flow should be calculated.
  • Page 32 Dresser Measurement IMCW2 User Terminal Software Manual Note: For units sealed for Measurement Canada custody transfer the flow sense must be set for “Forward” only. To set the required flow sense: • In the Flow section select the desired option from the drop-down selection box labelled Flow Sense. Details of the options are described in table above (Flow Sense Configuration Reference Table).
  • Page 33 Flow Alarm will be set if the actual flow rate is outside of the limits. Refer to the section entitled Faults and Alarms. The IMCW2 will set an Overspeed Fault if the measured uncorrected flow rate exceeds 125% of the meter Qmax. The operator is not required to set up this fault.

  • Page 34: Pulse Outputs

    Dresser Measurement IMCW2 User Terminal Software Manual 6.3.4 Pulse Outputs The pulse outputs can be configured as 0.1, 1, 10, 100 and 1000, and describe the volume per output pulse. These values can be either metric or Imperial. For example, if the corrected pulse output is set to 100 ft...
  • Page 35 Dresser Measurement IMCW2 User Terminal Software Manual To set the pulse outputs: • In the Pulse Outputs section select the appropriate (Corrected or Uncorrected) drop down selection box and select the desired option. The new value will be highlighted yellow.
  • Page 36 Dresser Measurement IMCW2 User Terminal Software Manual To set the pulse width: • In the Pulse Outputs section select the Pulse Width drop down selection box and select the desired option. The pulse width of the output pulses can be set to o 62.5 ms (not suggested for an Itron™...

  • Page 37: Pulse Output Allocation

    Uncorrected, o Corrected o Fault Note: refer to the Dresser IMCW2 Hardware Manual to match physical connection • The new value will be highlighted yellow. • Select the OK option on the Volume Configuration screen.

  • Page 38: Display

    Dresser Measurement IMCW2 User Terminal Software Manual 6.3.6 Display The Display section on the Volume Configuration screen contains 4 drop down selection boxes: • Corrected Volume Multiplier • Corrected Volume Digits • Uncorrected Volume Multiplier • Uncorrected Volume Digits The LCD can display up to 8 digits for the various volumes.
  • Page 39 Dresser Measurement IMCW2 User Terminal Software Manual For firmware versions 6.00 and higher: The maximum value stored in the volume register is 99,999,999,999 plus 0.99 [ft ] or [m ]. This means 11 volume digits plus 2 digits residual volume. The registered volume is shown on the Live Data screen. If the volume is increased by 0.01 in set volume units, then the volume stored in register becomes zero and the counting will continue.
  • Page 40 Dresser Measurement IMCW2 User Terminal Software Manual Number of volume digits to display on LCD can be selected To set the corrected and uncorrected volume digits: • In the Display section select the appropriate Digits drop down menu and select the desired option.
  • Page 41 Dresser Measurement IMCW2 User Terminal Software Manual Note: For units sealed for Measurement Canada custody transfer the number of digits must be 5-8 digits • The new value will be highlighted yellow. • Select the OK option on the Volume Configuration screen.
  • Page 42 Dresser Measurement IMCW2 User Terminal Software Manual Display Multiplier An increase to the Multiplier will effectively shift the appropriate volume value to the left on the LCD, revealing the most significant figure of the volumes value; if no further significant values are to be revealed a "0”...
  • Page 43 Dresser Measurement IMCW2 User Terminal Software Manual To set the corrected and uncorrected volume multiplier: • In the Display section, select the appropriate Multiplier drop down selection box and select the desired option. The new value will be highlighted in yellow.
  • Page 44 Dresser Measurement IMCW2 User Terminal Software Manual Display U/C on LCD © 2022 Natural Gas Solutions North America, LLC Page 44 of 179...

  • Page 45: Fault Pulse Output Configuration

    Dresser Measurement IMCW2 User Terminal Software Manual 6.3.7 Fault Pulse Output Configuration Refer to the Volume Configuration screen for Fault Pulse Output Configuration. Fault Output Pulse forms: • Continuous pulses • Single Latch pulse (level) o Normally off o Normally on ...

  • Page 46: Corrections Configuration

    Dresser Measurement IMCW2 User Terminal Software Manual 6.4 Corrections Configuration To access the Corrections Configuration screen, select the Corrections option in the Configuration screen. The Correction Configuration Parameter Reference Table is provided as a quick reference indicating the accepted ranges for the correction configuration parameters.
  • Page 47 Dresser Measurement IMCW2 User Terminal Software Manual The Corrections Configuration screen is divided 3 sections and the parameters that can be changed on this screen are those associated with volume correction: • Temperature – the operator can specify the temperature units, base temperature value, and whether to utilize either live temperature measurement via the temperature probe or a specified fixed temperature value.

  • Page 48: Temperature Measurement

    Dresser Measurement IMCW2 User Terminal Software Manual 6.4.1 Temperature Measurement • Alternatively, if live temperature readings cannot be taken, the operator is able to specify a fixed temperature; this constant value is then used for calculating supercompressibility. It is possible to set the temperature units to enable the display of temperature readings in either °C or °F To set the temperature units: •...
  • Page 49 Dresser Measurement IMCW2 User Terminal Software Manual To set the base temperature: • In the Temperature section select the Base Temperature text box and enter the desired value. The new value will be highlighted yellow. Note: See Correction Configuration Parameter Reference Table for acceptable range.

  • Page 50: Pressure Measurement

    Dresser Measurement IMCW2 User Terminal Software Manual 6.4.2 Pressure Measurement Live pressure measurement is enabled via a factory installed pressure transducer (pressure transducer range is order specific). If a gauge transducer is fitted, an additional text box is enabled to allow the operator to specify the appropriate value for Atmospheric Pressure.
  • Page 51 Dresser Measurement IMCW2 User Terminal Software Manual To set the pressure units: • In the Pressure section select the desired Units option (bar, kgf/cm , kPa or PSI). The new option described as the Base Pressure value will be highlighted yellow, and the new pressure units will be displayed to the right of the Base Pressure text box.
  • Page 52 Dresser Measurement IMCW2 User Terminal Software Manual  Note: When a fixed pressure value is used the pressure alarm limits and settings (accessible through the Faults & Alarms screen) are disabled. To set a fixed pressure factor value: • The value entered for the Fixed Pressure Factor determines the value for the Fixed Line Pressure and vice versa;...

  • Page 53: Supercompressibility

    Dresser Measurement IMCW2 User Terminal Software Manual Supercompressibility 6.4.3 Volume correction is calculated based on live pressure and temperature measurement, fixed pressure and temperature measurement or any combination of fixed and/or live pressure and/or temperature measurement. The operator can specify whether supercompressibility is to be calculated by selecting the Supercompressibility method and using gas composition inputs selected by the operator and from the live pressure and temperature readings, or if a fixed “Z”...
  • Page 54 Dresser Measurement IMCW2 User Terminal Software Manual To set a fixed supercompressibility value • In the Configuration screen, select the Corrections option and the Corrections Configuration screen will be displayed. • In the Supercompressibility section, select the Fixed option. The new option described as the Supercompressibility (Fpv ) text boxed will be enabled.
  • Page 55 Dresser Measurement IMCW2 User Terminal Software Manual To select a Method of Calculation for Live Supercompressibility Measurement: • From within the Supercompressibility section select the Live Measurement option. The new option will be implied various compressibility calculation methods and radio button options will be enabled.
  • Page 56 Dresser Measurement IMCW2 User Terminal Software Manual • In the Corrections Configuration screen select the radio button to view the available methods • Select one of the following methods: 1. AGA8 Gross Method 1 2. AGA8 Gross Method 2 3. SGERG88 Method 1 4.
  • Page 57 Dresser Measurement IMCW2 User Terminal Software Manual • See the Supercompressibility Configuration Parameter Reference Table for appropriate input ranges and input your values into the white fields Method Parameter Minimum Maximum Heating Value 18.7 MJ/m 45.1 MJ/m Specific Gravity 0.554 0.87...
  • Page 58 Dresser Measurement IMCW2 User Terminal Software Manual If the Detailed Method is selected, an additional window will appear: Gas Composition selection screen • Input your values for the Detailed Method. • There are additional buttons for adjusting methane and other regional default values.
  • Page 59 Dresser Measurement IMCW2 User Terminal Software Manual If a value entered by user total greater than 100%, a warning message pops up seen below: • Once all the required parameter values are entered select the OK option on the Conversions Configuration screen ...
  • Page 60 Dresser Measurement IMCW2 User Terminal Software Manual Abbreviations for gas compositions and gas parameters available on LCD display Name of Component Abbreviation Methane Nitrogen Carbon Dioxide Ethane Propane Water Hydrogen Sulfide Hydrogen Carbon Monoxide Oxygen iButane nButane iPentane nPentane nHexane...

  • Page 61: Differential Pressure Monitoring

    (REF: ANSI B109.3 Appendix A). The differential pressure value is measured every 30 seconds and can be viewed on the IMCW2-dp LCD. This value is accessible through the MCUT Logging function and is also recorded on the Live Data screen.

  • Page 62: Set Date & Time

    6.6 Set Date & Time It is possible to set the date and time stored in the IMCW2 using the MCUT software. This may be required if the unit has been left in storage for a period of time without the battery connected. It is also possible to set the Date Format.
  • Page 63 To set the date and time: • The date and time stored in the IMCW2 is displayed and is identified as Time in MC at Last Snapshot. • Select the Update Now option; the Time in MC at Last Snapshot value, New Date (mm/dd/yy)* and New Time (hh:mm:ss) selection boxes will all be updated.

  • Page 64: Customize Lcd

    Dresser Measurement IMCW2 User Terminal Software Manual 6.7 Customize LCD Depending on the IMCW2 model, the front panel selector button of the IMCW2 will enable the following parameters to be displayed on the LCD: • Corrected Volume • Uncorrected Volume •...
  • Page 65 The Configuration screen will be displayed, and any changed parameters will be highlighted yellow in the parameters selection list. • Select Upload to MC. The new details will be uploaded to the IMCW2. A dialog box will be displayed stating Sent OK. Select OK. © 2022 Natural Gas Solutions North America, LLC...
  • Page 66 Select the parameter(s) that are-required/not-required to be displayed on the LCD, ensure that the appropriate check box is checked/unchecked. If a parameter is disabled, it may be because it is not available on the model of IMCW2 that you have chosen. •...

  • Page 67: Mc Comms Settings

    Dresser Measurement IMCW2 User Terminal Software Manual 6.8 MC Comms Settings (only for units equipped with an external modem)  Note: For details on setting-up and communicating via a modem contact your Dresser representative. © 2022 Natural Gas Solutions North America, LLC Page 67 of 179...

  • Page 68: Upload To Mc

    6.9 Upload to MC After configuration data has been changed in the MCUT, you can upload the new parameter details to the IMCW2. Prior to the upload, any parameters that have been changed are highlighted yellow in the parameters selection list;...

  • Page 69: Protection Of Metrological Parameters

    Audit Log.  Note: If the IMCW2 is configured with password protection, it may be necessary to enter a password to upload the changes; the default password is the numerical value 0. © 2022 Natural Gas Solutions North America, LLC...
  • Page 70 Dresser Measurement IMCW2 User Terminal Software Manual Password Protected Parameters Reference Table Password Protected Parameter Meter Type Meter Size Flow Sense Corrected Multiplier Uncorrected Multiplier Volume Configuration Pulse Output Allocation Corrected Pulse Output Uncorrected Pulse Output Corrected Volume Uncorrected Volume...

  • Page 71: Hardware Protection

    Note: Canadian Micro Correctors are protected by hardware protection and a physical read/write jumper which must be in the Read/Write position on the PCB to upload any changes. Refer to the Dresser Measurement IMCW2 Hardware Manual. There are two positions for the hardware link on the main PCB board as follows: •...
  • Page 72 Dresser Measurement IMCW2 User Terminal Software Manual Hardware Link Protected Parameters Reference Table Password Protected Parameter Meter Type Meter Size Flow Sense Corrected Multiplier Uncorrected Multiplier Volume Configuration Corrected Pulse Output Uncorrected Pulse Output Corrected Volume Uncorrected Volume Clear Uncorrected Volume under Fault Register...

  • Page 73: Hardware And Software Protection

    Dresser Measurement IMCW2 User Terminal Software Manual 6.9.4 Hardware and Software Protection The IMCW2 can be configured so that the majority of the metrological parameters are hardware protected, but some selected metrological parameters are protected by a software password. Firmware version 3.00 and higher allows the user to change the following supercompressibility parameters: a.
  • Page 74 Dresser Measurement IMCW2 User Terminal Software Manual  Note: Parameter values entered during the initial factory programming are not counted as a parameter change event. 3. Information related to reverification events: Auto-generated successive event number Date Time Event Description: e.g. “Self-contained log was reverified”...
  • Page 75 Dresser Measurement IMCW2 User Terminal Software Manual The following screen which allows downloading both the Audit Log and the Self-Contained Event Log will appear: Audit Log download screen  Note: The “Reverification” button is grayed out. This button only becomes available when the Self- Contained Event Log reaches more than 185 recorded entries.
  • Page 76 Dresser Measurement IMCW2 User Terminal Software Manual If the hard link protection switch is set to the “Read Only” position, and the operator attempts to change parameters other than selected supercompressibility parameters, the following message will appear: Indicates failed attempt to change a parameter not available for software password protection when the hardware link is set in Read-only position The operator must enter the password and his/her name (max seven characters).

  • Page 77: Reverification Process

    Dresser Measurement IMCW2 User Terminal Software Manual 6.9.5 Reverification process If the number of events registered in the Self-Contained Event Log reaches more than 185 events, the following message appears. This indicates the log is full and reverification is now required:...
  • Page 78 Dresser Measurement IMCW2 User Terminal Software Manual Select the “Reverification” button. The following message will appear:  Note: To perform the reverification, the operator must break the hardware metrological seal by changing the position of the hardware link to the “Read/Write” position.

  • Page 79: Battery Type

    Dresser Measurement IMCW2 User Terminal Software Manual 6.10 Battery Type Once you select the Battery Type from the Configuration Tab a window will pop up allowing you to choose between Alkaline or Lithium Selecting Lithium will activate the New Lithium battery installed button which is explained in the section entitled Battery Replacement.

  • Page 80: Save Configuration File

    The MCUT provides the facility to save configuration files. This is beneficial when it is necessary to configure several IMCW2’s with the same configuration data, as the file can be opened by the MCUT, and then uploaded to the IMCW2.

  • Page 81: Open Configuration File

    OK, otherwise select Cancel). • The new details will be uploaded to the IMCW2. A dialog will be displayed stating Sent OK. Select OK, and the uploaded parameters will be displayed with the default white background.

  • Page 82: Report

    The MCUT provides a Create Report facility. A read only report is generated which details the configuration of the IMCW2. The operator can enter a report heading via the keyboard; this could reflect the configuration type (e.g. B Series 3M meter) or meter location reference (e.g. south 1). The report can include a data snapshot of the data stored in the corrector.
  • Page 83 Dresser Measurement IMCW2 User Terminal Software Manual File format can be saved as either .HTML or .CSV The information provided in the report includes (dependent on model and configuration of the IMCW2): • Volume configuration screen parameters. • Corrections configuration screen parameters.
  • Page 84 Dresser Measurement IMCW2 User Terminal Software Manual • To include a data snapshot, select the Include Data Snapshot In Report check box (ensure that a check is displayed in the appropriate check box). • Select Create Report. • A report viewer will be displayed, containing all the required data. If the data snapshot is included the details can be found in the second half of the report and will be entitled Data Snapshot along with the date and time that the data was retrieved.

  • Page 85: Report Viewer

    Dresser Measurement IMCW2 User Terminal Software Manual 6.13.1 Report Viewer / View Release Notes The report viewer contains 6 options; these will enable the operator to Save Report, Open Report and Print reports. Selection of the Save Report, Open Report, and Print options will display the Save As, Open and Print dialogs common to the PC.

  • Page 86: Calibration Tab

    Upon selection of the Calibration tab the Calibration screen will be displayed. This screen is divided into 2 sections: Temperature and Pressure. Assuming connection with the IMCW2 has already been established, then it is possible to calibrate both the temperature and pressure.
  • Page 87 • Note: Pressure calibration of an IMCW2 T-Only unit is not possible as no pressure transducer is fitted. If the IMCW2 is configured to read a fixed pressure or temperature the associated calibration options will not be available. If a fixed temperature or pressure is used, the measurement modes must be set to live measurement within the MCUT for the appropriate parameter to calibrate the desired transducer.

  • Page 88: Temperature Single Point Calibration

    From within the Calibration screen select the temperature Single Point Calibration option. The Temperature Calibration dialog will be displayed. • Select the Update Live Temperature option. The IMCW2 temperature reading will be updated, displayed as read only text and labeled on the screen as Live Temperature. •...

  • Page 89: Temperature Zero And Span Calibration

    On the Calibration screen select the temperature Zero and Span Calibration option. The Temperature Calibration screen will be displayed. • Select the Update Live Temperature option. The IMCW2 temperature reading will be updated, displayed as read only text, and labeled as Live Temperature. •...
  • Page 90 Dresser Measurement IMCW2 User Terminal Software Manual To restore temperature zero and span calibration factory defaults: • From within the Calibration screen select the temperature Zero and Span Calibration option. The Temperature Calibration dialog will be displayed. • Select the Restore Factory Defaults option. Enter the password if appropriate and select OK, otherwise select Cancel.

  • Page 91: Pressure Single Point Calibration

    • Ensure the pressure transducer of the IMCW2 is connected to the pressure calibrator. • Set a reference pressure point on the reference calibrator that is within the range of the IMCW2 pressure transducer. • On the Calibration screen, select the pressure Single Point Calibration option. The Pressure Calibration screen will be displayed.

  • Page 92: Pressure Zero And Span Calibration

    On the Calibration screen select the pressure Zero and Span Calibration option. The Pressure Calibration screen will be displayed. • Select the Update Live Pressure option. The IMCW2 pressure will be updated, displayed as read only text and labeled as Live Pressure. •...

  • Page 93: Monitor Pressure Calibration

    7.5 Monitor Pressure Calibration If IMCW2 is equipped with a secondary line-pressure transducer (Monitor) the Monitor Pressure Calibration is the same as the primary line-pressure transducer (section 7.3 and 7.4) © 2022 Natural Gas Solutions North America, LLC...

  • Page 94: Live Data Tab

    Dresser Measurement IMCW2 User Terminal Software Manual Live Data Tab Select the Live Data screen. This read only function provides the operator with a read only screen from which it is possible to view a data snapshot (which may be updated as often as required). The information provided by the data snapshot includes (dependent on model selected): •...
  • Page 95 • In the MCUT, select the Live Data tab. The Live Data screen will be displayed. • The options available on this screen depend on the model and configuration of the IMCW2. To update values: • On the Live Data screen, select the Update Values option.

  • Page 96: Faults & Alarms Tab

    Dresser Measurement IMCW2 User Terminal Software Manual Faults & Alarms Tab A Fault in the IMCW2 occurs if metrology functionality is obstructed. Fault conditions are defined by design; no setup is required. An Alarm in the IMCW2 occurs if conditions defined by user are not met.
  • Page 97 Dresser Measurement IMCW2 User Terminal Software Manual Normally on Configuration of Fault Pulse Output form © 2022 Natural Gas Solutions North America, LLC Page 97 of 179...

  • Page 98: Clear Occurred Faults

    Faults), or locally by scrolling through the LCD parameters until the test screen is displayed (scrolling 8’s). Remain on the test screen until CLr FLt is displayed. Press the IMCW2 selector button and this will clear the occurred faults register. Following the selection of the Update Values options on the Live Data screen, the icon on the Occurred Faults section will return to green with a “0”.
  • Page 99 Dresser Measurement IMCW2 User Terminal Software Manual FAULT DESCRIPTION/REASON LIVE DATA Volume NOTES Accumulation Fault Names Volume Fault Caused by open wire(s) in volume Vol FLt and Volume fault Volume counting Internal MC2 sensor. When there are one or more alarm bell problem.

  • Page 100: Clear Uncorrected Volume Under Fault

    Dresser Measurement IMCW2 User Terminal Software Manual  Note: When P Fault occurs outside of calibration range or T Fault occurs outside of operating range, accuracy of volume is not guaranteed even if you set extreme alarm limits for P and T.

  • Page 101: Fault Dialout Settings

    Dresser Measurement IMCW2 User Terminal Software Manual 9.4 Fault Dial out Settings  Note: For details on setting-up and communicating via a modem contact your Dresser representative. © 2022 Natural Gas Solutions North America, LLC Page 101 of 179...

  • Page 102: Configuration Of Alarm Functionality

    Dresser Measurement IMCW2 User Terminal Software Manual 9.5 Configuration of Alarm functionality Select the Faults and Alarms Screen. On this screen it is possible to set the alarm limits, specify the information to be displayed on the LCD in an alarm condition, specify whether a pulse output is to be generated in alarm conditions, clear the uncorrected volume under fault, and clear occurred alarms and faults.
  • Page 103 Select the appropriate text box and enter the desired alarm limit; if an invalid value is entered the operator will be advised of the acceptable range (The new parameters will need to be uploaded to the IMCW2 via the Configuration screen).
  • Page 104 From the Display section, select the parameter(s) that is / are required to be displayed on the LCD; ensure that a check is displayed in the appropriate check box (The new parameters will need to be uploaded to the IMCW2 via the Configuration screen).

  • Page 105: Alarm Dialout Settings And Monitor Calls

    (The new parameters will need to be uploaded to the IMCW2 via the Configuration screen). If a parameter is disabled, it may be because it is not available on the IMCW2 that you have.

  • Page 106: Clear Occurred Alarms

    Dresser Measurement IMCW2 User Terminal Software Manual 9.8 Clear Occurred Alarms An alarm can be described as a measurement reading exceeding operator configurable limits. This is not a fault on the unit. It may be used as a means of monitoring the system remotely. When an alarm condition occurs, an appropriate alarm code is displayed on the LCD (see Alarm Code Reference Table).
  • Page 107 Note: The user can select which Alarms to display on the LCD. Telemetry Fault pulse outputs can be set  to continuous or single-latched pulse as per the AMR connected to the IMCW2. ALL THESE ALARMS HAVE SOLID BELL ICON ON THE LCD. When the present alarm goes away, the blinking bell icon is seen on LCD.

  • Page 108: Advanced Tab

    To display the advanced screen: • Note: The options available on this screen depend on the model and configuration of the IMCW2. If a required option is not available, please contact your Dresser Representative for further details. © 2022 Natural Gas Solutions North America, LLC...

  • Page 109: Digital Input/Output

    Alarm or Digital Output / Volume Consumption Alarm or Meter Lockup Output Note: Refer to the Dresser IMCW2 Hardware Manual. Note: For the fully digital IMCW2, the second connector is marked “Multipurpose.” 10.1.1 External Power Two connectors in Terminal Block TB1 i.e. Not marked (Multipurpose) and GND, are configured by default for external power input.

  • Page 110: Digital Input

    Dresser Measurement IMCW2 User Terminal Software Manual 10.1.2 Digital Input Select Digital Input on the Advanced tab and then click Digital Input/Output Settings, this window appears: Digital Input Screen There are four selections: • Voltage level for input alarm state, i.e. LOW or HIGH •...

  • Page 111: Consumption Alarm Output

    Dresser Measurement IMCW2 User Terminal Software Manual 10.1.3 Consumption Alarm Output The Consumption Alarm Output facility provides digital signal (i.e., HIGH or LOW signal level) on the digital output terminal. If Maximum Daily Consumption of gas is reached, then an Alarm State is set for the digital output. The operator can set a value of Maximum Daily Consumption, the Start Time for Daily Billing, and the signal level in Alarm State.
  • Page 112 Dresser Measurement IMCW2 User Terminal Software Manual • Fault Pulse is generated on Output Pulse if selected. Daily Consumption Register is always reset for Start Time for Daily Billing. Depending on the user selection in the Customize LCD screen, the following parameters can be displayed with an abbreviated description on the LCD: •...

  • Page 113: Meter Lockup Output

    Dresser Measurement IMCW2 User Terminal Software Manual 10.1.4 Meter Lockup Output One of the most severe problems in rotary gas meter functionality is meter lockup. Lockup means that the gas meter impellers will stop rotating or rotate with high resistance. This condition usually happens if debris in the natural gas stream enters the meter and blocks impellers’...

  • Page 114: Trim Table

    Select the Send option. Enter the advanced password and select OK, otherwise select Cancel. • The new details will be uploaded to the IMCW2. A dialog box will be displayed stating that Trim Table Enabled and Sent, select OK. The Advanced screen will be displayed.
  • Page 115 Enter the advanced password and select OK, otherwise select Cancel. • The new details will be uploaded to the IMCW2. A dialog box will be displayed stating that Trim Table Enabled and Sent, select OK. The Advanced screen will be displayed.
  • Page 116 Dresser Measurement IMCW2 User Terminal Software Manual Trim Table Setup Screen © 2022 Natural Gas Solutions North America, LLC Page 116 of 179...

  • Page 117: Prover Mode

    Testing the accuracy of the output signals and verifying the volume accumulation by using Smart Prove is described in two Dresser Documents: IOM Smart Prove Manual (for the Dresser Model 5 Prover) and in the Dresser Model 6 Prover Operation and Maintenance Manual for the Dresser Model 6 Prover.
  • Page 118 From the Advanced screen select the Prover Mode option. The Prover Mode screen will be displayed.  Note: The duration that the IMCW2 is set into Prover Mode is 60 minutes and this value is not editable. However, it is possible to switch the IMCW2 out of Prover Mode at any time.
  • Page 119 OK. The Prover Mode screen will be displayed. • Normal operation will resume, ProvE will no longer be displayed on the LCD on the IMCW2. • From the Prover Mode screen, select OK and the Advanced screen will be displayed.

  • Page 120: Test Pulse Outputs

    Enter the advanced password and select OK, otherwise select Cancel. A dialog will be displayed stating Test pulse mode entered successfully. Select OK. • The LCD on the IMCW2 will display PULSES. The Advanced screen will be displayed. • The output pulses will be generated. On completion of the test pulse outputs facility normal operation will resume.

  • Page 121: Change Basic Or Advanced Password

    Dresser Measurement IMCW2 User Terminal Software Manual 10.5 Change Basic or Advanced Password All password protected parameters are those that, when changed, will affect the customer’s bill. The default password is the number “0”. Any new password must be numerical and between 1 and 8 digits long.

  • Page 122: Gas Meter Health Diagnostics

    Dresser Measurement IMCW2 User Terminal Software Manual 10.6 Gas Meter Health Diagnostics ‘DP Measurement’ units and settings are only active for IMCW2-dp version correctors. These settings will only affect differential pressure testing and results, and meter health diagnostics. © 2022 Natural Gas Solutions North America, LLC...

  • Page 123: Dp Transducer Units

    Dresser Measurement IMCW2 User Terminal Software Manual 10.6.1 DP Transducer Units Select ‘DP Transducer Units’ and the following screen appears. Use the drop-down menu to select between imperial (in WC) and metric (mbar) units. When finished press ‘OK’. DP Transducer Units Screen ©...

  • Page 124: Gas Meter Health Diagnostic Setup

    Dresser Measurement IMCW2 User Terminal Software Manual 10.6.2 Gas meter Health diagnostic setup Select Diagnostics setup and the following screen appears: © 2022 Natural Gas Solutions North America, LLC Page 124 of 179...

  • Page 125: Imcw2 With Line-Pressure Transducer

    Then the following Meter Diagnostic setup and values screen will appear: • Select among the three models for gas meter health diagnostics: Dresser’s Differential Test Acceptance Calculator (DTAC) software, Learn method 1, or Learn method 2. Both learn methods achieve more accurate DP data by ©...
  • Page 126 The value of pressure correction does not influence billing and is used only for gas meter health diagnostics, refer to Appendix A - The IMCW2 LCD Displayed Messages for details.

  • Page 127: Imcw2 With Temperature-Only (No Line-Pressure Transducer)

    Dresser Measurement IMCW2 User Terminal Software Manual 10.6.4 IMCW2 with Temperature-only (no Line-Pressure transducer) If the configuration screen has Fixed (t Only) selected for pressure: Then the following Meter Diagnostic setup and values screen will appear: © 2022 Natural Gas Solutions North America, LLC...
  • Page 128 The fixed Line-pressure value (at the pressure regulator) is entered by the operator into the correction screen. Then in this scenario the pressure correction is performed by the IMCW2. This value (example 20 psi below) is used for the Meter-Health diagnostics.

  • Page 129: Logging Tab

    From the MCUT select the Logging tab. The Logging screen will be displayed. • Note: The options available on this screen depend on the model and configuration of the IMCW2. If a required option is not available, please contact your Dresser Representative for further details.

  • Page 130: Download Audit Log

    Dresser Measurement IMCW2 User Terminal Software Manual 11.1 Download Data Log When downloading the data log it is possible to select the specific data that is to be retrieved; which log to be downloaded, the range of data for that log, and the manner in which the logged data should be displayed within the log file.

  • Page 131: Download Log1, Log2 And Log3

    Dresser Measurement IMCW2 User Terminal Software Manual 11.1.1 Download Data Log1, Log2 and Log3 The method for downloading the data logs is the same for Log1, Log2 and Log3; therefore, the methods described below apply to all 3 logging frequencies (Note: to download Log1 the download options must be changed within the Log1 section, Log2, the Log2 section and Log3, the Log 3 section).

  • Page 132: Options

    If the IMCW2 is configured as Imperial, then volume is logged in ft3 (CF) and can also be presented in m3. If the IMCW2 is configured as metric, then volume is logged in m3 and can also be presented in either MCF (ft3/1000) or in MMCF (ft3/1000000).

  • Page 133: Download Dp Log

    Dresser Measurement IMCW2 User Terminal Software Manual 11.2 Download Audit Log An audit log facility is provided to ensure that all changes to parameters that may affect the customer’s billing are recorded. All audit log files saved in the MCUT are of the type .CSV. A Refresh Data option is provided to ensure that the latest log entry details available for download are included.
  • Page 134 Dresser Measurement IMCW2 User Terminal Software Manual Audit Log Parameter Meter Type Meter Size Flow Sense Corrected Multiplier Uncorrected Multiplier Corrected Pulse Output Volume Configuration Uncorrected Pulse Output Pulse Output Allocation Pulse Width Corrected Volume Uncorrected Volume Uncorrected Volume under Fault...
  • Page 135 Dresser Measurement IMCW2 User Terminal Software Manual Trim Table Settings Prover Mode Advanced Options Test Pulses Output Password Change Advanced Password Change Note: In addition to these configurable parameters, the audit log will also display faults and alarms that ...
  • Page 136 Dresser Measurement IMCW2 User Terminal Software Manual To view a downloaded audit log: • Once downloaded from the MCUT select the View Last Log option. The default spreadsheet program used to open CSV files will be launched and the audit log file will open. The data can then be manipulated as required.
  • Page 137 Dresser Measurement IMCW2 User Terminal Software Manual 11.3 Download DP log Example of DP Test log © 2022 Natural Gas Solutions North America, LLC Page 137 of 179...

  • Page 138: Logging Setup

    Dresser Measurement IMCW2 User Terminal Software Manual 11.4 Logging Setup The Logging Setup dialog is divided into 4 sections; the Logged Parameters, Log1, Log2, and Log3; from within these sections the operator can configure what data is logged and the frequency of these logs.

  • Page 139: Logged Parameters

    Dresser Measurement IMCW2 User Terminal Software Manual • Peak Uncorrected Flow Rate • Supercompressibility • Minimum Pressure • Maximum Pressure • Average Pressure • Ending Pressure • Minimum Temperature • Maximum Temperature • Average Temperature • Ending Temperature • Battery Voltage The logging frequency is distributed over a maximum of 3 different logging intervals;...

  • Page 140: Download Data Log

    Dresser Measurement IMCW2 User Terminal Software Manual • Select the Upload Logging Setup option. Note: By changing the configuration of the logged parameters, any existing log entries will be cleared from  the data log. Therefore, it is recommended that any existing data log is downloaded prior to any changes to the data log configuration.
  • Page 141 Dresser Measurement IMCW2 User Terminal Software Manual  Note: If any parameters or logging frequencies are changed, the user will be prompted with the following warning screen. Warning Screen If “Upload Logging Setup” is chosen, the user will again be prompted with the following 2nd warning screen.

  • Page 142: Monitor Pressure

    Dresser Measurement IMCW2 User Terminal Software Manual 12 Monitor Pressure IMCW2’s with firmware version 1.91 or higher, can be equipped with a second pressure transducer, a Monitor Pressure transducer, in addition to a Line Pressure transducer. This transducer can be absolute or gauge type. Pressure units selected on the Configuration screen must be the same for both the line and monitor transducers.

  • Page 143: System Tab

    Dresser Measurement IMCW2 User Terminal Software Manual 13 System tab System Tab has been added starting from version 3.00 and MCUT version 5.0.0.0. The system screen contains information about hardware configuration, metrological protection, and integrity of the system. This screen has the following four sections: •...

  • Page 144: Internal Hardware Section

    Dresser Measurement IMCW2 User Terminal Software Manual 13.1 Internal Hardware section: The Internal hardware section is divided into sub-sections that display the following details of the system: • Unit Serial Number – Serial number allocated during factory configuration, which the operators cannot modify •...

  • Page 145: Temperature

    Dresser Measurement IMCW2 User Terminal Software Manual • Commissioned Pressure S/N – displays the serial number of digital pressure transducer that is commissioned to work in the system • Commissioned Monitor/DP S/N – displays the serial number of digital monitor pressure transducer or DP transducer that is commissioned to work in the system •...

  • Page 146: Digital Ports

    13.3 Digital Ports There are two digital ports in the IMCW2 that connect digital line pressure, digital monitor pressure, and digital DP transducers. There is information about what type is connected to a particular digital port. Each digital transducer has the following information: •...

  • Page 147: Digital Sensors Crc

    Dresser Measurement IMCW2 User Terminal Software Manual 13.4 Digital Sensors CRC There may be up to three digital transducers connected into the system. Comparing the reference CRC number with live CRC number allows for detection of firmware corruption of the digital transducer. If corruption occurs, then a fault is set.

  • Page 148: Pressure And Temperature Transducer Replacement Functionality

    R/W (Read/Write) RO (Read-only) During the manufacturing process, Dresser configures the method of protection and assigns a serial number (S/N) to the digital transducers. The operator cannot change either the method of protection or the serial number of the transducer. The digital pressure and temperature transducers are commissioned to work in the Micro Corrector during the factory configuration.
  • Page 149 Dresser Measurement IMCW2 User Terminal Software Manual Select alarm indication on the LCD display for connection of Digital Temperature Sensor, Line and/or DP Pressure Transducers © 2022 Natural Gas Solutions North America, LLC Page 149 of 179...
  • Page 150 An example of the display indication for the line pressure transducer Alarm indication on LCD when a new line pressure transducer is connected to the IMCW2 During the configuration process, under the “Alarm Setting” tab, the operator can select checkboxes so that the...

  • Page 151: Replacing Digital Transducer - Logging

    96 (Digital Temp SN Digital Press SN ) Example of an Audit Log entry when a new digital line-pressure transducer is connected to the IMCW2. The Audit Log can be downloaded from a Micro Corrector by using the Micro Corrector User Terminal (MCUT).
  • Page 152 Read/Write and again communicate with the Micro Corrector. Then the following message appears on the screen: Message in MCUT when a new temperature or pressure sensor is connected to the IMCW2 with the metrological protection switch set in Read Only position The operator should follow this process to commission a new digital transducer: •...
  • Page 153 Dresser Measurement IMCW2 User Terminal Software Manual System Tab showing replaced and commissioned Pressure Transducers and Temperature Sensor © 2022 Natural Gas Solutions North America, LLC Page 153 of 179...

  • Page 154: Commissioning A New Digital Transducer - Logging

    Dresser Measurement IMCW2 User Terminal Software Manual 13.5.5 Commissioning a new digital transducer – Logging The replacement of a digital transducer, after commissioning, is recorded in the Audit Log with a Time/Date stamp. The following information is included in the log: •...
  • Page 155 Dresser Measurement IMCW2 User Terminal Software Manual Live Data screen with fully commissioned Pressure Transducers and Temperature Sensor © 2022 Natural Gas Solutions North America, LLC Page 155 of 179...
  • Page 156 Dresser Measurement IMCW2 User Terminal Software Manual The commissioning of a new digital pressure transducer ensures correct alarm settings. Under the Alarm Settings tab, the operator must change the transducer type and set the low and high-pressure alarms limits. Live Data screen after the replaced Pressure Transducers and Temperature Sensor are commissioned When connecting a different type of line-pressure transducer (Absolute or Gauge pressure), the operator should verify the correction parameters on the “Corrections Configuration”...
  • Page 157 Dresser Measurement IMCW2 User Terminal Software Manual Correction Configurations screen with an absolute pressure transducer © 2022 Natural Gas Solutions North America, LLC Page 157 of 179...

  • Page 158: Corrector Functionality If New Digital Transducer Is Not Commissioned

    Dresser Measurement IMCW2 User Terminal Software Manual 13.5.6 Corrector functionality if a new digital transducer is NOT commissioned to work with the corrector After a new digital transducer is connected to the corrector, a solid bell icon appears on the display and a S/N Alarm description is displayed (if configured).
  • Page 159 • Commissioned DP/Monitor Pressure transducer range System Tab shown when new sensors are connected but not commissioned to the IMCW2 Note: If a new digital transducer is commissioned to work in the Micro Corrector and, the serial number of the connected transducers does not match the serial number of those commissioned, the original transducer serial number is shown.
  • Page 160 Dresser Measurement IMCW2 User Terminal Software Manual The following shows the “System” tab for the Micro Corrector in this situation: • Commissioned (original) line pressure transducer serial number – 620190108 • Commissioned (original) line pressure transducer range – 3 bar •...

  • Page 161: Battery Replacement

    14 Battery Replacement The Type of battery pack installed in IMCW2 is configured during factory configuration. The IMCW2 can be powered by either an alkaline or lithium battery pack. Proper procedure for replacement of the battery pack is described in the Dresser Measurement IMCW2 Hardware Manual.

  • Page 162: Installed Battery Pack Information

    Dresser Measurement IMCW2 User Terminal Software Manual 14.1 Installed battery pack information The MCUT screen displays information on the type of battery pack installed in the corrector. To access the MCUT screen, follow these instructions: Under Configuration tab, select Battery Type to open the Battery type window.

  • Page 163: Imcw2 Is Configured With Alkaline Battery Pack

    Dresser Measurement IMCW2 User Terminal Software Manual 14.2 IMCW2 configured with Alkaline Battery Pack If the IMCW2 is configured with an Alkaline Battery Pack, then the following window appears: Battery Type Screen  Note: Options related to lithium battery pack are disabled if alkaline pack is installed.

  • Page 164: Imcw2 Is Configured With Lithium Battery Pack

    • Using the Scroll Button Instructions on using the Scroll button to reset battery life are also contained in the Dresser Measurement IMCW2 Hardware Manual. Option 1 - Procedure to reset remaining battery life using MCUT when a new lithium pack is installed: •...
  • Page 165 Dresser Measurement IMCW2 User Terminal Software Manual • A dialog box will be displayed stating Battery New Dates Send Successful. Select OK. Battery Date Change Screen Option 2 - New Lithium Battery installation – procedure to reset remaining battery life with Scroll Button Requirement: Indication of “Battery Voltage”...
  • Page 166 Dresser Measurement IMCW2 User Terminal Software Manual Process: • Replace lithium battery pack • Scroll on the display to “Battery Voltage” • Check to determine if the battery voltage is above 5.55 Volts • Hold the scroll button down for 10 seconds •...

  • Page 167: Meter Health Diagnostics

    15 Meter Health Diagnostics Rotary gas meter health diagnostics is provided for meters equipped with an IMCW2 that is fitted with a differential pressure (DP) transducer. The diagnostic is based on the differential pressure value measured between inlet and outlet differential pressure test connections that are installed in the rotary gas meter as cited in ANSI B109.3 Appendix A.

  • Page 168: Dp Daily Logging

    State Public Utility Commissions (PUC’s) regulate the monitoring and reporting of differential pressure test results. The IMCW2 gathers DP related parameters in a designated log that is accessible from the “Logging” tab after the “Download DP Log” button is selected:...
  • Page 169 73.29 The IMCW2 display shows values from the latest daily log if this option is selected. Five values are shown twice on display, each for 6 seconds. Chevrons blink to notify the user that DP test results are available. Refer to the Dresser Measurement IMCW2 Hardware Manual for further information.
  • Page 170 DP daily logs with the 25 DP daily logs acquired as the baseline. If the IMCW2 is removed from one meter and installed on different gas meter, it is advisable to restart the Daily DP Logging function for the new meter, which can be done by pressing “Restart DP Logging”...

  • Page 171: Gas Meter Health Diagnostics

    Line pressure, • Gas composition, • Temperature There are two mathematical models used in IMCW2 that calculate the value of DP in function of mentioned above parameters: • Dresser Differential Pressure Test Acceptance Calculator (DTAC) Software • IMCW2 mathematical model with learned coefficient Note: The DP value depends also on gas composition.
  • Page 172 The latest revisions to this legacy software have resulted in important changes to the mathematical model. The mathematical model used in the DTAC software is used in the IMCW2. This model requires values of line pressure, flow rate, specific gravity, and meter size/type. Not all Dresser meter types are included in this software.

  • Page 173: Fixed Line Pressure For T-Only Imcw2

    1. The Fixed Factor value for pressure correction does not represent live pressure and cannot be used for gas meter diagnostics. IMCW2 has separate functionality that allows for setting the fixed line pressure for gas meter diagnostics only. This value will not be used for billing purposes. The operator must make the selection “Enable Fixed Line Pressure”...

  • Page 174: Gas Meter Health Diagnostics - Indicators

    Meter Fault • Meter Lockup Information regarding gas meter health is available on the Live Data screen and on the IMCW2 display. In addition, fault output pulses are generated. The Dresser DTAC software is used for meter health diagnostics as follows: •...

  • Page 175: Meter Dp Fault

    Dresser Measurement IMCW2 User Terminal Software Manual Alarm is shown on the Live Data screen and on the IMCW2 display as Meter AL. Fault output pulses are generated and the event is registered in the Audit Log, Date/Time stamped. 15.3.2 Meter DP Fault...

  • Page 176: Meter Lockup

    DP samples is reset. DP LOC is displayed on the Live Data screen and on the IMCW2 display. Fault Pulse output is generated, and the event is registered in the Audit Log, Date/Time stamped.

  • Page 177: Appendix A - Lcd Displayed Messages

    Appendix A - LCD Displayed Messages The parameters displayed on the LCD of the IMCW2 can be accessed via the scroll button on the either the front panel or on the side of the IMCW2 enclosure. In addition to the parameters listed in Customize LCD screen, further messages are displayed for informational purposes.
  • Page 178 Tamper Alarm vol AL Volume Consumption Alarm ProvE XX IMCW2 is in Prover mode; remaining minutes will also be displayed ProvE? Pressing the Scroll Button will put the IMCW2 into Prover mode dIAL Out IMCW2 has entered modem dial out mode.
  • Page 179 12/2022 © 2022 Natural Gas Solutions North America, LLC – All rights reserved. Dresser Utility Solutions reserves the right to make changes in specifications and features shown herein, or discontinue the product described at any time without notice or obligation. Contact your Dresser Utility Solutions representative for the most current information.

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