1. Manuals
  2. Brands
  3. Dresser Manuals
  4. Industrial Equipment
  5. IMCW2
  6. Hardware manual

Dresser Micro IMCW2 Hardware Manual

Volume corrector
Hide thumbs Also See for Micro IMCW2:
Table of Contents

Advertisement

Quick Links

Download this manual
Dresser Micro Series Volume Corrector
Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC – All Rights Reserved.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Micro IMCW2 and is the answer not in the manual?

Questions and answers

Related Manuals for Dresser Micro IMCW2

Summary of Contents for Dresser Micro IMCW2

  • Page 1 Dresser Micro Series Volume Corrector Model IMCW2 Hardware Manual © 2023 Natural Gas Solutions North America, LLC – All Rights Reserved.

  • Page 2: Table Of Contents

    Radiated electromagnetic emission and immunity to electromagnetic disturbances ..........11 4 Installation ............................12 Unpacking ..............................12 Installation of IMCW2 Integral Corrector to Dresser Meters ............... 13 Environment ..............................13 5 Firmware version and CRC number indication on display ..............14 6 Specification and Details ........................
  • Page 3 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.3.2.1 Uncorrected Flow Rate ..........................28 6.3.2.2 Peak Uncorrected Flow Rate ......................... 29 6.3.2.3 Overspeed Flow Rate Fault ........................... 30 6.3.2.4 High Flow and Low Flow Alarms........................31 Volume Correction ............................32 Supercompressibility .............................
  • Page 4 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.13 Internal Power Supply ............................. 58 7 Configuration Protection ........................59 7.1.1 USA Configuration ..............................59 7.1.2 Canadian/EU Configuration ........................... 59 7.1.3 Hybrid Protection ..............................60 7.1.4 Setting The Read/Write Hardware Protection Link ....................61 8 Volume Accuracy Measurement .......................

  • Page 5: Information

    The IMCW2 unit is designed and approved intrinsically safe (I.S.) for use in hazardous areas. A serial port allows communication with the unit. The IMCW2 is configured and calibrated from a laptop computer via the serial port using the Dresser™ Micro Corrector User Terminal (MCUT) software. This will allow: •...

  • Page 6: Hardware Versions

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 2.1 Hardware Versions There are three hardware versions of the IMCW2 that relate to the PCB (main circuit board) revision: Fully analog (up to firmware version 3.03): processes only signals from analog pressure transducers and analog temperature sensors.

  • Page 7: Models Available

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 2.2 Models Available The IMCW2 is factory-built to suit customer order requirements. Options include: • Pressure measurement (without the pressure option the unit is an IMCW2 T-Only). • Externally or internally mounted pressure transducer available in various ranges and in gauge or absolute.

  • Page 8: Accessories

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 2.2.1 Accessories The IMCW2 Communication Cable consists of a 2-meter serial link cable terminated in a 7-pin screw locking DIN plug and 9 way “D” connector. Other available accessories include: •...

  • Page 9: Safety

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Safety The IMCW2 installation must meet Intrinsic Safety requirements, as stated in section 4 (Safety), before beginning installation. It is essential to follow any National Codes of Practice dealing with Intrinsically Safe installations. All Intrinsically Safe circuits must be segregated from non-I.S.
  • Page 10 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual With optional Micro Generator (Y-Adapter 057617-000) With optional Micro Generator (Y-Adapter 060324-000) © 2023 Natural Gas Solutions North America, LLC Page 10 of 88...

  • Page 11: Radiated Electromagnetic Emission And Immunity To Electromagnetic Disturbances

    – Conversion devices and EN 16314 standard: Gas meter – Additional functionalities. If equipment which is not approved by the manufacturer (Dresser™) is connected to the IMCW2, it is the responsibility of the operator to verify that the requirements of the above-mentioned standards are met. Dresser™ cannot assure that the functionality and volumetric measurement accuracy of the of corrector is maintained.

  • Page 12: Installation

    Calibration certificate A Micro Corrector User Terminal manual is available upon request or via download from the Dresser Utility Solutions website. Make sure that IMCW2 nameplate has CSA marking and for UK market UKCA marking. If marking is not present, do not install device on the gas line.

  • Page 13: Installation Of Imcw2 Integral Corrector To Dresser Meters

    The IMCW2 is mounted directly to the end cover of the rotary meter. For complete IMCW2 Assembly #400 Installation Instructions to Dresser™ Series A and Series B meters, refer to BLLN 056684-000 - Field Installation IMCW2 to meter. 4.3 Environment...

  • Page 14: Firmware Version And Crc Number Indication On Display

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Firmware version and CRC number indication on display  Note: Some metrological authorities require that electronic devices display the installed version of firmware. This is used to verify if the installed firmware version has been approved.

  • Page 15: Specification And Details

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Specification and Details 6.1 Pressure Measurement The IMCW2 is fitted with a pressure transducer, mounted according to requirements. The pressure port is a 1/8” NPT male fitting. The various pressure transducers and associated percentage of accuracy are listed in the below table.

  • Page 16: Pressure Related Display Parameters

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual  Note: firmware version 3.0.0 and higher, a digital pressure transducer can be used. Fully digital versions of IMCW2 with firmware 6.0.0 and higher use only digital pressure transducers. Digital Pressure Transducer Accuracy Reference Table Accuracy 25°C...

  • Page 17: Line Pressure

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.1.1.1 Line Pressure Line pressure indication on the display must be selected using the MCUT software. The pressure value is updated every 30 seconds. A chevron accompanies the pressure value shown on the display. This chevron points to the “Pressure” description on the front label.

  • Page 18: Pressure Fault

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.1.1.2 Pressure Fault A Line Pressure fault is set if: • The pressure value cannot be read from the transducer • The pressure value indicated is outside the range of the transducer Because this is a fault condition set by the IMCW2 automatically, no setup is required and this event is recorded in the Audit Log with date/time of occurrence.

  • Page 19: High Pressure And Low Pressure Alarms

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.1.1.3 High Pressure and Low-Pressure alarms The operator can set minimum and maximum Pressure values using the MCUT software. A pressure alarm will be set by the IMCW2 if the pressure value is outside of these limits. If a High or a Low Pressure Alarm is set, this event is recorded in the Audit log.

  • Page 20: Pressure Serial Number Alarm

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.1.1.4 Line Pressure Transducer Serial Number Alarm This alarm is available only if a digital line pressure transducer is used in the system. This alarm is set if line pressure transducer was replaced, but it was not commissioned by an authorized person to work in the system. Refer to the...

  • Page 21: Temperature Measurement

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.2 Temperature Measurement For IMCW2 units with Firmware Revision up to V3.0.3. Temperature measurement is performed by a 4-wire Class A 100-ohm platinum resistance thermometer (temperature probe) supplied as an option with the IMCW2. External temperature probes are available with either a 5 or 10-foot armored cable.

  • Page 22: Temperature

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.2.1.1 Temperature • Displaying the temperature indication must be selected using the MCUT software. The temperature value is updated every 30 seconds. A chevron accompanies the temperature value shown on display. This chevron points to the “Temperature”...

  • Page 23: High Temperature And Low Temperature Alarms

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual  Note: It is not possible to clear a “Present” fault. 6.2.1.3 High and Low Temperature Alarms The operator can set minimum and maximum temperature values. If the temperature value sensed is outside these parameters, a temperature alarm will be set, and this event recorded in the Audit Log.

  • Page 24: Temperature Sensor Serial Number Alarm

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.2.1.4 Temperature Sensor Serial Number Alarm This alarm is available only if the IMCW2 is fitted with a digital temperature sensor. This alarm is set if the temperature probe was replaced but not commissioned by an authorized person. Refer to section 16.5...

  • Page 25: Volume Input

    Forward Only The value of the input pulses depends on the meter size. Dresser™ meters can be either Series A (LMMA), Series B, Series G or Series B High P ressure. There are several meter models for both Series A and Series B, and this is operator-configurable using the MCUT software.
  • Page 26 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Corrected volume distinguished with letter “C”, if cuft C 8888888 selected X1000 Uncorrected volume distinguished with letter “U”, if cuft U 8888888 selected X1000 Corrected volume residual shown as “Cr” 0.15 Cr Uncorrected volume residual shown as “Ur”...

  • Page 27: Volume Fault

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.3.1.1 Volume fault Volume sensor consists of two Wiegand sensors. If any of them does not generate volume pulses, then a “Volume fault” is displayed. VoL FLt Volume Fault indicated on display Because this is a fault condition, this is set by IMCW2 automatically, no setup is required.

  • Page 28: Flow Related Parameters Available On Display

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.3.2 Flow Rate related parameters available on display Gas flow related values available on IMCW2 display: • Instantaneous actual (uncorrected) flow rate, • Peak uncorrected flow rate, • Overspeed fault, •...

  • Page 29: Peak Uncorrected Flow Rate

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 127.4 Uncorrected Flow rate indicated in [m3/h] on display 6.3.2.2 Peak Uncorrected Flow Rate Peak Uncorrected Flow Rate is used for proper meter sizing based on the total connected load of all the devices at that location.

  • Page 30: Overspeed Flow Rate Fault

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Indication that Peak Uncorrected Flow Rate value was PF CLr successfully reset 6.3.2.3 Overspeed Fault An overspeed fault is set if the uncorrected flow rate measured by the meter exceeds 125% of maximum allowable flow rate (Qmax) for that meter size.

  • Page 31: High Flow And Low Flow Alarms

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.3.2.4 High and Low Flow Alarms The operator can set minimum and maximum uncorrected flow values so that a high or low flow alarm will be set by the IMCW2 if the flow rate is outside of acceptable limits. If “High or Low Flow Alarm” is set, then this event is recorded in the Audit log.

  • Page 32: Volume Correction

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.4 Volume Correction The IMCW2 performs volume correction based on: • Uncorrected volume measurement • Line pressure measurement • Temperature measurement • Compressibility calculation - refer to section 6.4.3 in Software Manual.
  • Page 33 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 0.98875 Correction factor with chevron indicating position on the front label Pressure factor value with “PF” indication 0.99 PF Supercompressibility value with “Zb” 1.02 Zb indication Base pressure value with “Pb” indication 14.73 Pb...

  • Page 34: Introduction

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.5 Supercompressibility 6.5.1 Introduction Supercompressibility can be calculated by selecting a Supercompressibility method and using gas composition inputs selected by the operator and from the live pressure and temperature readings, or if a fixed “Z” value is to be used with the pressure and temperature.

  • Page 35: Aga 8 Gross Method 2

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 1000 U Indication of gas mixture Heating Value in [BTU/ft3] 37.000 J Indication of gas mixture Heating Value in [MJ/m3] 6.5.2.2 AGA 8 Gross Method 2 Parameter values for supercompressibility calculations using this method appear on the LCD as follows: •...

  • Page 36: Sgerg Method 1

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.5.2.3 SGERG Method 1 Parameter values for supercompressibility calculations using this method appear on the LCD as follows: • Chosen supercompressibility method • Carbon dioxide CO2 [%mol] • Hydrogen H2 [%mol] •...

  • Page 37: Sgerg Method 3

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.5.2.5 SGERG Method 3 Parameter values for supercompressibility calculations using this method appear on the LCD as follows: • Chosen supercompressibility method • Carbon dioxide CO2 [%mol] • Specific gravity •...

  • Page 38: Nx19 High Heating Value

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.5.2.8 NX19 High Heating Value Parameter values for supercompressibility calculations using this method appear on the LCD as follows: • Chosen supercompressibility method • Carbon dioxide CO2 [%mol] • Specific gravity •...
  • Page 39 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Indication of AGA 8 detailed method on display dEtAi i Indication of methane content in gas mixture 77.500 Indication of ethane content in gas mixture 0.100 2 Indication of propane content in gas mixture 0.200 3...
  • Page 40 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Indication of oxygen content in gas mixture 0.700 7 Indication of iButane content in gas mixture 0.800 8 Indication of nButane content in gas mixture 0.900 9 Indication of iPentane content in gas mixture 1.000 A...

  • Page 41: Supercompressibility Calculation Fault

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Indication of nOctane content in gas mixture 1.500 E Indication of nNonane content in gas mixture 1.600 F Indication of nDecane content in gas mixture 1.700 h Indication of Helium content in gas mixture 1.900 i...

  • Page 42: Gas Meter Health Diagnostics

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.6 Gas Meter Health Diagnostics Gas meter health diagnostics is based on differential pressure (DP) measurement, refer to section 17 in the Software Manual. The IMCW2 must be equipped with a differential pressure transducer that is piped to the inlet and outlet differential pressure taps on the gas meter.

  • Page 43: Dp Transducer Related Faults And Alarms

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual -0.015 nn DP value indicated in [mbar] 6.6.2 Differential Pressure Transducer related faults and alarms • DP transducer fault • Meter DP Zero fault • Digital DP/Mon SN alarm 6.6.2.1 DP Transducer Fault A DP transducer fault is set if the corrector cannot receive this value from the DP transducer which is primarily caused by either wire disconnection or if a measured value is out of range.

  • Page 44: Meter Dp Zero Fault

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual  Note: It is not possible to clear a “Present” alarm. If the DP transducer is digital and communication with transducer fails, then the following indication appears on the LCD. d2 FLt Communication with DP transducer failed 6.6.2.2 Meter DP Zero Fault...

  • Page 45: Gas Meter Health Related Faults And Alarms

    17.2 of the Software Manual. 6.6.3.1 Meter DP Fault A Meter DP fault is set by the IMCW2 if the Differential Pressure results value exceeds the value recommended by Dresser™. The DP value depends on the following: • Gas flow •...

  • Page 46: Meter Lockup

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Dresser™ recommends a site visit to diagnose the reason for the increased differential pressure and that action be taken to remedy the situation. If a “Meter DP fault” fault is set the event is recorded in Audit Log with date/time of occurrence.

  • Page 47: Meter Dp Alarm

    Note: It is not possible to clear a “Present” alarm. 6.6.3.3 Meter DP Alarm A Meter DP alarm is set by the IMCW2 if the value of the DP test exceeds the value recommended by Dresser™. DP value depends upon: •...
  • Page 48 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual If the alarm condition disappears: • Bell icon remains blinking on display • Alarm pulses are stopped If the alarm is acknowledged by operator and is cleared: • No bell is present on display The event of clearing alarm is recorded in the Audit log with a date/time stamp.

  • Page 49: Daily Logging Parameters Related To Gas Meter Health

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.6.4 Daily logging parameters related to gas meter health Section 17.1 of the Software Manual describes in detail this functionality. Note that valid samples of DP require a flow rate higher than 30% of maximum flow rate for the meter. There might be days when this condition is not met.

  • Page 50: Pulse Output

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.7 Pulse Outputs There are 3 user configurable and isolated Form-A pulse outputs (uncorrected, corrected and fault), and 2 ground terminals. These ground terminals are isolated from the other ground terminals of the IMCW2. Each output is an open drain connection capable of sinking 10mA and withstanding up to 15 Volts (5 Volts max.
  • Page 51 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual The options for pulse output connection types on the IMCW2 are shown below: Example of a Cable Gland and Military Style Circular Connector © 2023 Natural Gas Solutions North America, LLC...
  • Page 52 GND 2 (black) - Pin E • Pulse Output 3 (blue) - Pin F  Note: Dresser™ also provides “custom” wiring so your wiring may differ from the “standard” diagram shown above. © 2023 Natural Gas Solutions North America, LLC Page 52 of 88...

  • Page 53: Meter Dimensions

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.8 Meter Dimensions (IMCW2 and Meter Dimension Considerations) © 2023 Natural Gas Solutions North America, LLC Page 53 of 88...

  • Page 54: Serial Port

    12V into the IMCW2 with a 5V nominal output from the IMCW2 (RS232 / RS232C levels). Serial communication cable – Dresser™ Part Number 057135-001 and USB to Serial Port Adapter Kit – Dresser™ Part Number 060506-000 can be used to communicate via a PC to the IMCW2.

  • Page 55: Clearing Occurred Faults And Alarms

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Older front button New side button 6.10.1 Clearing occurred faults and alarms Occurred faults and alarms can be cleared with both the User Terminal software and with the scroll button. Faults and/or alarms can be cleared if the bell icon on the display is blinking.

  • Page 56: Display

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Display 6.11 The display is permanently active and operational over the temperature range -40°C to 60°C (-40°F to 140°F). Depending on the model option chosen and the operator’s configuration of the unit, the front panel selector button enables the IMCW2 to display the following parameters: •...

  • Page 57: Memory

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.12 Memory The IMCW2 has non-volatile memory and upon battery failure, will retain all the totals obtained within the last hour of operation and all set up data. These will be available and ready for use as soon as power is restored.

  • Page 58: Internal Power Supply

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6.13 Internal Power Supply The IMCW2 is powered by an internal alkaline (nominal life of 5 years) or optional lithium (nominal life of 12 years) battery pack. The actual length of the battery life will depend on the conditions of use. The state of the battery is monitored, and a low battery alarm is given at least 2 months before the batteries are exhausted.

  • Page 59: Configuration Protection

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Configuration Protection 7.1.1 USA Configuration All measurement parameters can be configurated using the serial communications cable and the MCUT software. Password protection is applied to these parameters. Such protection is called software protection.

  • Page 60: Hybrid Protection

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 7.1.3 Hybrid Configuration Protection Note: To comply with Canadian/EU regulations the IMCW2 can be configured so selected metrological parameters are protected with software password protected with the hardware link. IMCW2 Model Options Reference Table...

  • Page 61: Setting The Read/Write Hardware Protection Link

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Hardware Protection with physical Jumper Links on the main IMCW2 board allow for specific functionality. They are usually installed during factory configuration. If the IMCW2 is factory configured for hardware protection of metrological parameters, then three positions LK2 control functionality.
  • Page 62 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 2. Remove the 4 screws securing the IMCW2 front using the supplied 3mm hexagon wrench (Allen key). 3. Lift the front panel forward to expose the Board Protection Plate that covers the main circuit board.
  • Page 63 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 5. Identify the Read/Write protection link; remove it from the Read-Only position and replace it in the Read/Write position. R/W = Read Write 6. The necessary parameter changes can now be carried out via the User Terminal software (for further information consult the IMCW2 User Terminal Software Manual).

  • Page 64: Volume Accuracy Measurement

    IMCW2 installed. This is the combined uncorrected volume accuracy of both the gas meter and IMCW2. Some provers – such as the Dresser™ Model 5 and Model 6 Transfer Provers - can test the combined corrected volume accuracy of the gas meter and IMCW2.

  • Page 65: Maintenance

    20% of full true scale). If this value is exceeded, please contact Dresser™ for further information so that the cause of the inaccuracy may be investigated. For further details, refer to section 9.2 (Pressure Transducer Recalibration). The temperature calibration may also be performed by immersing the temperature probe into a container of liquid of a known temperature.
  • Page 66 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Sealed Alkaline Pack Sealed Lithium Pack Replaceable Alkaline-Cell Pack Before replacing the battery pack press the front panel selector button on the IMCW2. This operation ensures that the latest corrected and uncorrected totals are stored in the permanent memory of the IMCW2. Super capacitors will maintain normal operation of the unit during battery replacement.
  • Page 67 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual The battery pack affects the intrinsic safety approval of the IMCW2 and must be replaced with the correct Dresser™ battery pack. To replace the battery pack: 1. Press the front panel selector button on the front of the IMCW2.
  • Page 68 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 6. Place the new battery pack in to position and replace the 4 screws and 4 washers. 7. Plug the new battery pack into the main circuit board, such that the battery plug engages correctly with the connector locking ramp on the circuit board.
  • Page 69 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual  Note: If the battery is changed then be sure to change the battery type (alkaline or lithium) by connecting with serial cable and MCUT application. Battery Type Selection in MCUT Software 9.2.1 New Lithium Battery installation –...

  • Page 70: Internal Operation Fault

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Note: If the battery pack is disconnected and the IMCW2 is powered only from the super-cap, the voltage  constantly drops. Eventually the voltage will be below 5 [V] and two icons will start to blink on the display. The IMCW2 has now reached “Critical voltage threshold”.

  • Page 71: Temperature Calibration

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 9.4 Temperature Calibration Temperature recalibration should not be required. However, the IMCW2 may be temperature calibrated by the operator, using the serial port of the IMCW2 and the User Terminal software.

  • Page 72: Replacing Sensors And Components Service

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 9.7 Replacing Sensors and Components Service should only be performed by a person competent and knowledgeable about installation of intrinsically safe equipment and totally conversant with the National Code of Practice.

  • Page 73: Volume Input (Tb1)

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 9.7.1.1 Volume Input (TB1) The magnetic volume pickup should be connected to the W1, W2/REED and GND Volume Input terminals of TB1, as shown below: Volume Input Connections (TB1) Series B –...

  • Page 74: Temperature Measurement (Tb2)

    “I” terminals and the other wire from the same pair to the corresponding “V” terminal. Analog Temperature Probe Connections (TB2) Analog Temperature Probes for Dresser™ Series A (top) and Series B Meters (bottom) © 2023 Natural Gas Solutions North America, LLC...
  • Page 75 The wires should be connected to the TB2 terminal, as shown below (Digital Temperature Probe Connections). Digital Temperature Probe Connections (TB2) Digital Temperature Probe for Dresser™ Series A and Series B Meters © 2023 Natural Gas Solutions North America, LLC...

  • Page 76: Pulse Output (Tb3)

    Any equipment connected to the pulse output must be individually assessed to ensure that the system is safe. The Dresser™ will not take responsibility for the overall safety of the system. Pulse Output Connections (TB3) ...
  • Page 77 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 9.7.1.4.2 Digital line pressure transducer in board revision 21 The digital line pressure transducer is connected to (TB6), refer to the diagram below. Digital line pressure transducer connection in IMCW2 board revision 21 ...

  • Page 78: Differential/ Monitor Pressure Measurement

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual  Note: Some digital transducers have additional black wire. It shall be connected to GND (or left unconnected). 9.7.1.5 Differential/ Monitor Pressure Measurement The differential pressure transducer is used for gas meter health diagnostics and the monitor pressure transducer is used for sensing line pressure –...
  • Page 79 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual 9.7.1.5.2 Differential/Monitor Pressure Measurement with Digital Pressure Transducer IMCW2 board revision 21 has a terminal block (TB7) designated for the connection of digital DP/Monitor Pressure transducers. Refer to below for connection reference.

  • Page 80: Replacing Of Digital Temperature And Pressure Transducers

    Some metrological authorities place hardware seals on that plate. Replacing the digital transducer will require metrological re-verification. Refer to Dresser™ manual IMCW2 Digital Transducer Replacement for more information on transducer replacement. 9.7.2.1 Digital transducer faults indicated on display Digital transducers used in the IMCW2 have a reference CRC number calculated by the firmware during manufacturing - refer to section 16.4 in the MCUT Software Manual.

  • Page 81: Appendix A - List Of Fault/Alarms On Imcw2 Screen

    Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Appendix A - List of Faults/Alarms on IMCW2 Display The table below details the summary of faults and alarms that can be indicated on the IMCW2 display along with necessary actions that should be taken by the operator.
  • Page 82 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Digital Port 1 Fault When the digital sensor d1 Flt and Digital Port 1 Volume ─ communication fails on port 1 of Alarm Bell accumulation stops. board. Icon Digital port 2 fault...
  • Page 83 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Table 3. Fault/Alarm parameter and limit list (extreme) DP Alarms/Faults - only on units fitted with a Differential Pressure Transducer – Reference Section 6.6 LCD with solid DP ALARM/FAULTS DESCRIPTION/ REASON...
  • Page 84 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Appendix B - Table of main LCD Display screens Name Picture on LCD Display Corrected Volume Uncorrected Volume Flow Rate Correction Factor Meter Size Line Pressure © 2023 Natural Gas Solutions North America, LLC...
  • Page 85 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Temperature Uncorrected Volume Under Fault Corrected Residual Uncorrected Residual Firmware Version Base Pressure Pressure Factor © 2023 Natural Gas Solutions North America, LLC Page 85 of 88...
  • Page 86 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Supercompressibility Battery Voltage Current Date Current Time Accumulated Corrected Volume previous day Accumulated Corrected Volume current day Accumulated Corrected Volume previous month © 2023 Natural Gas Solutions North America, LLC Page 86 of 88...
  • Page 87 Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual Accumulated Corrected Volume current month Highest daily volume in the previous month Highest daily volume in the current month Date of last consumption alarm Maximum peak flow Differential pressure result © 2023 Natural Gas Solutions North America, LLC...
  • Page 88 Contact your Dresser Utility Solutions www.dresserutility.com representative for the most current information. The Dresser Logo and all Trademarks containing the term “Dresser” are the property of Dresser, LLC, a subsidiary of Baker Hughes. Dresser™ Micro Series Volume Corrector Model IMCW2 Hardware Manual NGS.MI.0044a...

Table of Contents

Save PDF