Dresser IMCW2 User manual

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

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 2 of 88
Contents
1Information .......................................................................................................................................5
2General Overview..............................................................................................................................5
2.1 Hardware Versions.......................................................................................................................................... 6
2.2 Models Available............................................................................................................................................. 7
2.2.1 Accessories ................................................................................................................................................8
2.2.2 Replaceable Components............................................................................................................................8
3Safety ................................................................................................................................................9
3.1.1 CSA Intrinsic Safety Diagram........................................................................................................................8
3.2 Radiated electromagnetic emission and immunity to electromagnetic disturbances ................................................ 11
4Installation ......................................................................................................................................12
4.1 Unpacking ..................................................................................................................................................... 12
4.2 Installation of IMCW2 Integral Corrector to Dresser Meters ....................................................................... 13
4.3 Environment ................................................................................................................................................. 13
5Firmware version and CRC number indication on display..................................................................14
6Specification and Details..................................................................................................................15
6.1 Pressure Measurement .................................................................................................................................. 15
6.1.1 Pressure related display parameters ....................................................................................................................16
6.1.1.1 Line Pressure.................................................................................................................................................17
6.1.1.2 Pressure Fault................................................................................................................................................18
6.1.1.3 High Pressure and Low Pressure alarms .......................................................................................................19
6.1.1.4 Pressure Serial Number alarm ......................................................................................................................20
6.2 Temperature Measurement ............................................................................................................................ 21
6.2.1 Temperature related parameters available on display ........................................................................................21
6.2.1.1 Temperature .................................................................................................................................................22
6.2.1.2 Temperature fault.........................................................................................................................................22
6.2.1.3 High Temperature and Low Temperature alarms.........................................................................................23
6.2.1.4 Temperature Sensor Serial Number alarm....................................................................................................24
6.3 Volume Input ................................................................................................................................................ 25
6.3.1 Volume and volume related parameters available on display .............................................................................25
6.3.1.1 Volume fault..................................................................................................................................................27
6.3.2 Flow related parameters available on display ............................................................................................ 28

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 3 of 88
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
6.4 Volume Correction ......................................................................................................................................... 32
6.5 Supercompressibility..................................................................................................................................... 32
6.5.1 Introduction ..........................................................................................................................................................34
6.5.2 Gas Composition Parameters available on display ...............................................................................................34
6.5.2.1 AGA 8 Gross Method 1..................................................................................................................................34
6.5.2.2 AGA 8 Gross Method 2..................................................................................................................................35
6.5.2.3 SGERG Method 1...........................................................................................................................................36
6.5.2.4 SGERG Method 2...........................................................................................................................................36
6.5.2.5 SGERG Method 3...........................................................................................................................................37
6.5.2.6 SGERG Method 4...........................................................................................................................................37
6.5.2.7 NX19 Low Heating Value...............................................................................................................................37
6.5.2.8 NX19 High Heating Value ..............................................................................................................................38
6.5.2.9 AGA 8 Detailed Method ................................................................................................................................38
6.5.3 Supercompressibility Calculation Fault ................................................................................................................41
6.6 Gas Meter Health Diagnostics ...................................................................................................................... 41
6.6.1 Differential Pressure transducer ...........................................................................................................................42
6.6.2 DP transducer related faults and alarms...............................................................................................................43
6.6.2.1 DP Transducer Fault .....................................................................................................................................43
6.6.2.2 Meter DP Zero Fault......................................................................................................................................44
6.6.2.3 DP/Mon Serial Number alarm.......................................................................................................................44
6.6.3 Gas Meter Health related faults and alarms .........................................................................................................45
6.6.3.1 Meter DP Fault..............................................................................................................................................45
6.6.3.2 Meter lockup.................................................................................................................................................46
6.6.3.3 Meter DP alarm.............................................................................................................................................47
6.6.4 Daily logging parameters related to gas meter health..........................................................................................49
6.7 Pulse Output.................................................................................................................................................. 50
6.8 Meter Dimensions ......................................................................................................................................... 53
6.9 Serial Port ...................................................................................................................................................... 54
6.10 Display Scroll Button..................................................................................................................................... 54
6.10.1 Clearing occurred faults and alarms....................................................................................................................55
6.11 Display........................................................................................................................................................... 56
6.12 Memory......................................................................................................................................................... 57

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 4 of 88
6.13 Internal Power Supply..................................................................................................................................... 58
7Configuration 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
8Volume Accuracy Measurement.......................................................................................................64
8.1 Volume Accuracy Measurement using Telemetry Pulse Output.................................................................. 64
8.2 Volume Accuracy Measurement using Serial Port........................................................................................ 64
9 M ain t enanc e ...................................................................................................................................65
9.1 Replacing the Battery Pack ........................................................................................................................... 65
9.2 Internal Operation Fault ................................................................................................................................. 70
9.3Pressure Transducer Calibration................................................................................................................... 70
9.4Temperature Calibration............................................................................................................................... 71
9.5Restoring Factory Defaults............................................................................................................................ 71
9.6Service........................................................................................................................................................... 71
9.7Replacing Sensors and Components Service ................................................................................................ 71
9.7.1 Location of the Connection Terminals.......................................................................................................................72
9.7.1.1 Volume Input (TB1).........................................................................................................................................73
9.7.1.2 Temperature Measurement (TB2) ................................................................................................................74
9.7.1.3 Pulse Output (TB3) ........................................................................................................................................76
9.7.1.4 Line Pressure Measurement .........................................................................................................................76
9.7.1.5 Differential/ Monitor Pressure Measurement ..............................................................................................78
9.7.2 Replacing of Digital Temperature and Pressure Transducers ..........................................................................................80
9.7.2.1 Digital transducers faults indicated on display..............................................................................................80
Appendix A - List of Fault/Alarms on IMCW2 Screen ....................................................................................81
Appendix B - Table of main LCD Display screens ..........................................................................................81

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 5 of 88
1Information
All printed material contained within this handbook is for information only and is subject to change without notice.
This manual uses the words corrector, corrected and uncorrected throughout. The words corrector, corrected and
uncorrected should be read as meaning convertor, converted and unconverted as defined by the most recent standards
on volume conversion.
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 non-compensated.
2General Overview
The Dresser™Integral Micro Series Volume Corrector Model IMCW2 can be installed directly onto all Dresser™meters and
meters from certain other manufacturers. Volume is sensed from the rotation of the impellers via a volume sensor, therefore
the input signal to the electronic counter and volume corrector is of high resolution. This translates into extremely high
accuracy volume measurement and correction. The lack of a mechanical counter increases the rangeability of the gas meter
and decreases the starting flow rate of the meter.
The IMCW2 is designed to measure live pressure (optional) and live temperature (optional) to calculate corrected volume.
The IMCW2 can be equipped with differential pressure transducer (DP) performs mechanical gas meter health diagnostics.

Note: A temperature-only version of the IMCW2, the IMCW2 T-Only is also available. The IMCW2 T-Only
measures live temperature, and the operator can configure a fixed line pressure value. All functionality, with
exception of the live pressure measurement is identical to that of the IMCW2, and the details contained within
this handbook should be read as being applicable to both.
The IMCW2 utilizes E2PROM memory which eliminates the need for back up batteries as all configuration information,
logged data and audit log entries will be stored during periods of no power. The data logging facility provides the operator
with 3 independent operator configurable logging periods. The audit logging facility provides a means of tracking up to the
latest 32 changes to the configuration parameters. Both the data and audit logs are saved as CSV (comma-delimited) files to
allow easy import into spreadsheets such as Microsoft® Excel. For further details regarding the data and audit logging facility
consult the IMCW2 User Terminal Manual.
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:
•Configuration
•Calibration
•Data extraction
•Alarm monitoring

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 6 of 88
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. Transducer calibration is stored on a memory chip installed on the main PCB; therefore, replacement of transducers
cannot be performed by the user.
Hybrid analog & digital (firmware version 4.0x): allows for the use of either digital or analog pressure transducers; however
only analog temperature sensors can be used. If digital pressure transducers are used, then they can be replaced by the user
as the transducer calibration is stored on a memory chip inside the transducer.
Fully digital (firmware version 6.0.0 and higher): allows using only digital pressure transducers and digital temperature
sensors and both are able to be replaced by the end user.
In all three hardware versions, the general functionality of the IMCW2 remains the same. Depending on the hardware
revision, analog or digital line pressure, monitor pressure, and differential pressure (DP) transducers and temperature
sensors are used to build the measurement system.
Input signals into the microprocessor include:
•Volume from the dual sensor magnetic pickup
• Temperature - analog or digital signal
•Line Pressure - analog or digital signal
•Differential Pressure (DP) - analog or digital signal. Alternatively, this pressure input could be a monitor pressure signal.
• Push button for display scrolling
•User Terminal software (MCUT) for configuration and calibration
Output signals from the microprocessor include:
•Information parameters on the display
• Serial communication data available locally via the MCUT software, or remotely via a modem
•Volume output pulses available for AMR or Provers
•Fault/Alarm pulses
The Micro Corrector User Terminal software that has been updated to accommodate the fully digital IMCW2 is backward
compatible with other IMCW2 versions.

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 7 of 88
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.
•Pulse output via Circular or Cable Gland pulse output connector for IMCW2 T-Only options.
• Analog platinum resistance temperature probe –internally or externally mounted
• Digital temperature probe –internally or externally mounted
•3 Configuration Protection methods - Canadian (read/write jumper) configuration protection or USA (password)
configuration protection and hybrid configuration protection - see sections 7.0
Temperature Probe
Only
Temperature Probe and
Pressure Transducer

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 8 of 88
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:
•Thermowells - used for external temperature only:
2 inches x ¼” NPT
056091-013
2 inches x 1”NPT
050784-002
4 inches x 1”NPT
050784-001
6 inches x 1”NPT
050784-000
•Pressure/Valve Piping Kits for Line Pressure and Differential Pressure Piping:
2.2.2 Replaceable Components
• Replacement temperature probe
• Replacement line pressure transducer (for fully digital version only)
• Replacement differential pressure transducer (for fully digital version only)
•Replacement magnetic pickup (Micro Generator is no longer available and can replaced with a standard magnetic
pickup)
•Replacement battery pack - either alkaline or lithium

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 9 of 88
3Safety
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. circuits, refer to CSA approval 1224451 drawing 061293-000 below.
The IMCW2 is intrinsically safe for installation in Class 1, Div. 1,Group A, B, C, and D locations. Canadian Standards Association
(CSA) approval number 1224451.
3.1.1 CSA Intrinsic Safety Diagram
The drawings attached below refer to CSA intrinsic safety diagram (061293-000).
Standard Magnetic Pickup

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 10 of 88
With optional Micro Generator (Y-Adapter 057617-000)
With optional Micro Generator (Y-Adapter 060324-000)

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 11 of 88
WARNING
1. Do not try to open battery pack in hazardous areas.
2. The connection of any non-intrinsically safe equipment must be properly assessed by the user. The manufacturer (Dresser™)
will not take responsibility for the overall safety of the system.
3. For commissioning and reading data the serial port may also be connected to a lap top computer under the following
conditions:
•Laptop computers, generally, are not intrinsically safe. Therefore, before using an uncertified laptop in the hazardous area,
a gas test should be performed to prove that no potentially hazardous gas mixture exists in the area. If this is not possible
the laptop must not be used in a hazardous area.
•The laptop computer must be powered by batteries alone and these must be incapable of supplying more than 25 Volts. No
connection is to be made to an external supply (e.g., charger) even if it is non-operational. (The presence of the connection
can itself create a hazardous condition.
4. The temperature probe is only suitable for use at atmospheric pressure and therefore must be used in conjunction with a
thermowell which can withstand the line pressure.
5. Line pressure transducers, temperature sensor and DP/monitor transducers replacement and connection of wires to IMCW2
terminal blocks can be performed only in no hazardous environment.
6. All individual wires connected to the circuit board must have at least 0.25mm (1/100 ins) of insulation.
CAUTION
Battery pack is static hazard. Clean only with damp cloth.
3.2 Radiated Electromagnetic Emission - Immunity to Electromagnetic Disturbances
The IMCW2 meets the required limit for radiated electromagnetic emission defined by FCC 47 CFR Part 15, Subpart B.
The IMCW2 meets requirements for immunity to electromagnetic disturbances defined in EN 12405-1 standard: Gas meters
–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.
If for any reason the enclosure of IMCW2 is opened (e.g., to replace a battery pack), precautions should be made to avoid
static discharge which can damage electronic components.

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 12 of 88
4Installation
4.1 Unpacking
The following items are supplied with the IMCW2:
Quantity
IMCW2 Handbook
1
3mm hexagon wrench (Allen key)
1
Spacer
4
M4 x 20 cup fixing screw
3
Calibration certificate
1
A Micro Corrector UserTerminal 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.
Example of IMCW2 front label with CSA and UKCA marking

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 13 of 88
4.2 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
The IMCW2 may be operated over the following ranges:
Temperature
-40°C to 60°C (-40°F to 140°F).
Humidity
0 –95% (condensing).
EMC
Meets FCC class B requirements, EN12405
Ingress
IP66 and NEMA 4X for dust and water penetration, i.e. fully weatherproof.

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 14 of 88
5Firmware 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.
An additional verification is given if a CRC number is calculated live when the metrological authority inspector requests it.
The CRC number indicated at that time is compared with the reference CRC number recorded during the firmware version
approval process. Matching the live CRC number and the reference CRC number also indicates that the installed firmware is
not corrupted. If the firmware is corrupted for any reason, it cannot be used for billing purposes and the requirement is that
a fault indication be set.
The firmware revision in the IMCW2 is located on the display if it was selected by using the MCUT software - refer to chapter
6.7 in the Software manual entitled Customize LCD. Note: Certain metrological authorities require that the firmware version
always present on the display.
Firmware version shown on display
The Live CRC number is automatically calculated in the IMCW2 every 11 minutes, or upon request when scrolling the display
to “Firmware version”.
Live CRC number shown on display

Note: The hexagonal number is accompanied with “CrC” indication.
The purpose of the automatic calculation of a Live CRC number every 11 minutes is to confirm that the firmware is not
corrupted. If mismatch exists between the Live CRC number and the Reference CRC number, then an “Internal Fault” is set.
“Int Flt” is indicated on the display. If this mismatch exists, the IMCW2 should be removed from service.
In addition, the Live CRC number is shown with indication “crc” – lower case letters.
6.00 Fr
Ab18 CrC

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 15 of 88
6Specification 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.
Pressure Transducer Accuracy Reference Table
Pressure Transducer Range
Details
2 Bar (30 psi) A
IMCW2 maximum error of 0.4% of reading fr om 0.8 Bar A to 2.0 Bar A over operating temperature
r ange of -40°F to +140°F (-40°C to +60°C )
2 Bar (30 psi) G
IMCW2 maximum error of 0.4% of reading fr om 0.8 Bar G to 2.0 Bar G over operating temperature
r ange of -40°F to +140°F (-40°C to +60°C )
12 Bar (180 psi) A
IMCW2 maximum error of 0.4% of reading fr om 1 Bar A to 12 Bar A over operating temperature
range of -40°F to +140°F (-40°C to +60°C )
12 Bar (180 psi) G
IMCW2 maximum error of 0.4% of reading fr om 1 Bar G to 12 Bar G over operating temperature
range of -40°F to +140°F (-40°C to +60°C )
100 Bar (1480 psi) A
IMCW2 maximum errorof 0.4% of reading fr om 5 Bar A to 100 Bar A over operating temperature
range of -40°F to +140°F (-40°C to +60°C )
100 Bar (1480psi) G
IMCW2 maximum errorof 0.4% of reading fr om 5 Bar G to 100 Bar G over operating temperature
range of -40°F to +140°F (-40°C to +60°C )
The transducer burst pressure will exceed transducer range +20% for all the transducers provided.
A=Absolute Pressure, G=Gauge Pressure

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 16 of 88

Note: In 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
Accuracy (-25 to 55°C)
Accuracy (-40 to 70°C)
2.8 Bar A
+/- 0.2 % RDG
+/- 0.5 % RDG
12 Bar A
+/- 0.2 % RDG
+/- 0.5 % RDG
100 Bar A
+/- 0.2 % RDG
+/- 0.5 % RDG
2.8 Bar G
+/- 0.04 % FS
+/- 0.1 % FS
12 Bar G
+/- 0.04 % FS
+/- 0.1 % FS
100 Bar G
+/- 0.04 % FS
+/- 0.1 % FS
A=Absolute Pressure, G=Gauge Pressure
6.1.1 Pressure Related Display Parameters
Line pressure related parameters available on display:
• Line Pressure value with abbreviated units
• Line Pressure fault
• High Pressure alarm
•Low Pressure alarm
•Line Pressure Serial Number alarm (digital transducer only)

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 17 of 88
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.
Pressure can be shown on the display in the following units of measure: [psi], [bar], [kPa] and [kg/cm2].
Pressure indicated in [psi]
Pressure indicated in [bar]
Pressure indicated in [kPa]
Pressure indicated in [kg/cm2]
14.7 P
1.014 b
101.3 ˫PA
1.03˫9f

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 18 of 88
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.
If a pressure fault is present:
• Bell icon is solid on the LCD
•Description of the pressure fault is shown on LCD
• Live data screen shows Present and Occurred Flow fault in “Fault section” of Live Data screen,
• If the option is chosen to pulse out fault pulses, then fault pulses are sent to the receiving device at this point.
Indication of Pressure fault on display
If the fault condition disappears then:
• Bell is blinking on display
• Fault pulses are no longer sent
If occurrence of the fault is acknowledged by the operator and the fault is cleared, then:
• No bell is present on display,
The event of clearing the fault is recorded in Audit log with a date/time stamp. Clearing the fault can be performed with or
without the Micro Corrector User Terminal software.

Note: It is not possible to clear a “Present” fault.
P FLt

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 19 of 88
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.
If an alarm is present then a solid bell is shown on display, refer to figures below.
• Description of alarm is shown on display
• Fault pulses are sent out via the output pulse connector
High Pressure alarm indicated on display.
Low Pressure alarm indicated on display.
If the alarm condition disappears then:
• Bell is blinking on LCD,
•Fault pulses are stopped.
If occurrence of alarm is acknowledged by operator and the alarm is cleared, then:
• No bell is present on LCD.
The event of clearing alarm is recorded in the Audit log with a date/time stamp. Clearing the alarm can be performed with
or without the User Terminal software.

Note: It is not possible to clear a “Present” alarm.
HP AL
LP AL

Dresser™Micro Series Volume Corrector Model IMCW2 Hardware Manual
© 2023 Natural Gas Solutions North America, LLC Page 20 of 88
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
appropriate section in the IMCW2 User Terminal Software Manual.
If the “Pressure Serial Number” alarm is set, this event is recorded in Audit log.
If an alarm is present, a solid bell is shown on display.
If this is selected in UT “Alarm Setting” then:
• Description of the alarm is shown on the display
• Fault pulses are sent via the output pulse connector

Note: Functionality of line pressure transducer continues as designed despite the alarm being set
Alarm indication for line pressure transducer not
commissioned to work in the system
If the line pressure transducer is then properly commissioned using the MCUT software, then:
•Bell stops blinking on LCD
•Fault pulses are stopped
•Alarm record is deleted from Audit log

Note: It is not possible to clear a “Present” alarm.
P Sn AL