TechnipFMC Smith Meter MPU C Series Instruction manual

Gas Ultrasonic Flowmeters
Installation / Operation / Maintenance Manual
Smith Meter®MPU™Series C
Bulletin MNKS025 Issue/Rev 0.1 (11/18)
MANUAL

Page 2 • MNKS025 ║ Issue/Rev. 0.1 (11/18)
Important
All information and technical specications in this documentation have been carefully checked and compiled by
the author. However, we cannot completely exclude the possibility of errors. TechnipFMC is always grateful to be
informed of any errors.
Measurement Solutions
Smith Meter
Regentstrasse 1
D-25474 Ellerbek
Tel.: [phone] - 0 (Switchboard)
Fax: [phone] - 152 (Service)
Fax: [phone] - 133 (Sales)
Fax: [phone] - 255 (Order processing)
E-Mail: [email protected]
Web: www.technipfmc.com

Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 3
MPU Series C I/O/M Manual Table of Contents
Table of Contents
1 – General ......................................................................... 5
1.1. – Orientation Aids for the Manual ................................. 5
1.2. – Safety Instructions..................................................... 6
1.2.1. – Hints for Installation in Hazardous Area ................. 7
1.2.2. – Danger for High Pressure and Explosive Gas........ 7
1.2.3. – Temperature Drop and Depressurization................ 8
1.2.4. – Lifting Heavy Loads................................................ 8
1.2.5. – Disposal.................................................................. 8
1.2.5.1. – Disposal of a Functional Component or System... 8
1.2.6. – Proper Intended Use .............................................. 8
1.3. – Maintenance.............................................................. 9
1.3.1. – Maintenance Plan................................................... 9
2 – Product Overview...................................................... 11
2.1. – Purpose of Equipment............................................. 11
2.2. – Measurement Principle............................................ 11
2.2.1. – Transit Time Measurement................................... 12
2.2.2. – Travel Time Corrections........................................ 13
2.2.3. – Calculate Average Gas Flow Velocity................... 13
2.2.4. – Ultra Series Flowmeter Features.......................... 14
2.2.5. – Applications .......................................................... 14
3 – Operation of MPU ...................................................... 15
3.1. – Major Components of the Ultrasonic Flowmeter ..... 15
3.2. – Identification and Marking........................................ 15
3.3. – Receipt of Equipment .............................................. 16
3.4. – Pre-Installation Inspection ....................................... 16
3.4.1. – Mechanical Inspection.......................................... 17
3.4.2. – Installation of the Spool Piece .............................. 17
3.4.3. – Equipment and Tools Required ............................ 17
3.5. – Mechanical Installation ............................................ 18
3.6. – Handling of Flowmeter............................................. 18
3.7. – Flow Conditioning.................................................... 18
3.7.1. – MPU 800 Recommended Installation................... 18
3.7.2. – MPU 1600 Recommended Installation................. 19
3.8. – Electrical Installation................................................ 20
3.9. – For ATEX and IEC Ex Installations.......................... 21
3.9.1. – Installation of Cables ............................................ 22
3.9.1.1. – Equipment Required.......................................... 23
3.9.1.2. – Cable Installation Check List ............................. 23
3.10. – Transducer Wiring ................................................. 24
3.11. – Explosion-proof housing closure............................ 25
3.12. – Flame Path Inspection Criteria .............................. 25
4 – UMCB (Ultrasonic Meter Control Board .................. 27
4.1. – Wiring Examples/Information................................... 27
4.1.1. – Power Supply ....................................................... 27
4.1.2. – Input/Output Wiring............................................... 27
4.1.3 – Digital I/O............................................................... 28
4.1.4. – Digital/Pulse Output.............................................. 28
4.1.5. – Digital Inputs......................................................... 29
4.1.6. – Weights & Measures Lock.................................... 30
4.1.7. – Analog Inputs........................................................ 30
4.1.8. – Analog Outputs..................................................... 31
4.2. – Communications...................................................... 32
4.2.1. – Ethernet................................................................ 32
4.2.2. – Alarm Output......................................................... 32
4.2.3. – RS-485 ................................................................. 33
4.2.4. – USB ...................................................................... 33
5 – Meter Start-Up............................................................ 35
5.1. – LEDs Overview........................................................ 35
5.1.1. – LED Behavior ....................................................... 36
5.1.2. – Start-Up ................................................................ 36
5.1.3. – Normal Operation ................................................. 36
5.1.4. – Setting the Meter IP Address................................ 36
6 – Web User Interface.................................................... 39
6.1. – Main Menu............................................................... 39
6.2. – Language Selection................................................. 39
6.3. – Overview Menu........................................................ 39
6.3.1. – Path Flow.............................................................. 40
6.3.2. – Path Signals ......................................................... 40
6.3.3. – Accumulators........................................................ 41
6.3.4. – History Chart......................................................... 41
6.4. – Setting Menu ........................................................... 42
6.4.1. – Login Screen ........................................................ 42
6.4.2. – Settings................................................................. 42
6.4.2.1. – General.............................................................. 43
6.4.2.1.1. – Account Administrative ................................... 43
6.4.2.1.2. – Date/Time ....................................................... 44
6.4.2.1.3. – Units of Measurement .................................... 44
6.4.2.2. – Network Settings ............................................... 45
6.4.2.3. – Flow Calibration................................................. 45
6.4.2.4. – Communications................................................ 47
6.4.2.4.1. – Serial Port Function........................................ 47
6.4.2.4.2. – Baud Rate Selection....................................... 48
6.4.2.4.3. – Parity Selection............................................... 48
6.4.2.4.4. – Word Length Selection ................................... 49
6.4.2.4.5. – Stop Bit Selection ........................................... 49
6.4.2.4.6. – Modbus Unit ID............................................... 50
6.4.2.4.7. – Modbus Endian............................................... 50
6.4.2.4.8. – Meter Tag........................................................ 51
6.4.2.4.9. – Modbus NaN Substitution Mode..................... 51
6.4.2.4.10. – Modbus NaN Subtitution Value..................... 52
6.4.2.5. – Diagnostic.......................................................... 52
6.4.2.5.1. – Datalog Interval .............................................. 52
6.4.2.5.2. – Signal Logging Interval................................... 53
6.4.2.6. – Factory Settings................................................. 54
6.4.2.7. – Meter Body ........................................................ 54
6.4.2.8. – Inputs and Outputs ............................................ 54
6.4.2.9. – Limits ................................................................. 54
6.4.2.9.1. – Min and Max Velocity of Sound ...................... 54
6.4.2.9.2. – Max RX Gain Difference................................. 54
6.4.2.9.3. – Max VOS Deviation ........................................ 55
6.4.2.9.4. – Min Signal to Noise Ratio ............................... 55
6.4.2.9.5. – Max Turbulance Level .................................... 55
6.4.2.9.6. – Max Swirl/Crossflow Deviation ....................... 55

Page 4 • MNKS025 ║ Issue/Rev. 0.1 (11/18)
MPU Series C I/O/M Manual Table of Contents
6.4.2.9.7. – Min and Max Flow Rate.................................. 55
6.4.2.9.8. – Max Profile Flatness Deviation....................... 55
6.4.2.9.9. – Maximum Profile Symmetry Deviation............ 55
6.4.2.9.10. – Low Flow Cutoff............................................ 55
6.4.2.9.11. – Low Flow Cutoff Selector.............................. 55
6.4.2.9.12. – Enable Confidence Alarms ........................... 56
6.4.2.10. – Modes.............................................................. 56
6.4.2.10.1. – Disable Paths ............................................... 56
6.4.2.10.2. – Manual Values.............................................. 56
6.4.2.10.3. – Line Temperature Input Mode....................... 57
6.4.2.10.4. – Line Pressure Input Mode ............................ 58
6.4.2.10.5. – Line Temperature Fallback Value ................. 58
6.4.2.10.6. – Line Pressure Fallback Value....................... 59
6.4.2.10.7. – Electronic Sealing Mode............................... 59
6.4.2.10.8. – Electronic Seal State .................................... 59
6.4.2.10.9. – Diagnostic Mode........................................... 60
6.4.2.10.10. – Loopback Flow Velocity.............................. 61
6.4.2.10.11. – Loopback Velocity of Sound ....................... 61
6.4.2.10.12. – Loopback Flow Profile ................................ 62
6.4.2.11. – Signal............................................................... 62
6.4.2.12. – Transducer....................................................... 62
6.5. – Alarms Menu............................................................ 63
6.6. – Run Data Menu ....................................................... 63
6.6.1. – Run Data Screens ................................................ 63
6.6.1.1. – Path Data........................................................... 64
6.6.1.2. – System Data...................................................... 65
6.6.1.3. – Computation Data.............................................. 65
6.7. – Diagnostics Menu.................................................... 65
6.7.1. – Monitoring............................................................. 66
6.7.1.1. – Inputs and Outputs ............................................ 66
6.7.1.2. – Logs................................................................... 67
6.7.1.2.1. – Weights & Measures Log ............................... 67
6.7.1.2.2. – Alarm Log ....................................................... 68
6.7.1.2.3. – Event Log ....................................................... 68
6.7.1.2.4. – Download Logs............................................... 69
6.7.1.2.5. – Historical Data Logs ....................................... 69
6.7.2. – Commissioning..................................................... 70
6.7.2.1. – Analog Calibration ............................................. 71
6.7.2.1.1. – Example Non-RTD Calibration ....................... 71
6.7.2.1.2. – Example RTD Calibration............................... 72
6.7.2.2. – Simulate Flow.................................................... 72
6.7.2.3. – Simulate Analog Output..................................... 73
6.7.2.4. – Simulate Pulse Output....................................... 73
6.7.2.5. – Force Values...................................................... 74
6.7.3. – Meter Restart........................................................ 74
6.7.4. – Download Parameters as PDF............................. 74
6.7.5. – Download Program Parameters ........................... 76
6.7.6. – Upload Program Parameters................................ 76
6.7.7. – Update Software................................................... 77
6.7.8. – Reset Passwords.................................................. 78
6.8. – Weights & Measures: Sealing ................................. 78
6.8.1. – Hardware Sealing................................................. 78
6.8.2. – Software Sealing .................................................. 79
6.9. – Meter Information .................................................... 80
7 – Integrated Touch Screen Display............................. 81
7.1. – Features .................................................................. 81
7.2. – HMI Display Unit...................................................... 81
7.2.1. – Electrical Installation............................................. 81
7.2.1.1. – Power Supply .................................................... 81
7.2.1.2. – Connection to Ultrasonic Meter Control Board.. 82
7.2.1.3. – Display Start-Up ................................................ 82
7.3. – Integrated Display Operation................................... 82
7.3.1. – Display Main Menu............................................... 82
7.3.1.1. – Display Configuration ........................................ 83
7.3.1.2. – Display Configuration – General........................ 84
7.3.1.3. – Display Network Settings................................... 84
7.3.1.4. – Display Connections.......................................... 85
7.3.1.5. – Display Modes................................................... 86
7.3.2. – Display Maintenance Settings .............................. 87
7.3.2.1. – Touch Screen Calibration .................................. 87
7.3.2.2. – Password Reset ................................................ 87
7.3.3. – Display Information............................................... 87
7.3.4. – Display Reconnect................................................ 88
7.3.5. – Weights & Measures Sealing Procedures............ 88
7.3.6. – Display Network Configuration ............................. 97
8 – Fluid Correction Configuration ................................ 99
8.1. – GOST (Gas Meter Only)........................................ 100
9 – Language Selection................................................. 105
10 – Maintenance........................................................... 107
10.1. – External Inspection every 2 years ....................... 107
10.2. – Replacement of O-Ring and Back-up Ring ......... 107
10.3. – Replacement of Transducers............................... 108
10.4. – Replacement of Electronic Boards ...................... 108
10.4.1. – Recommended clock battery replacement interval
– 5 years when meter is in service .................................. 109
10.5. – Storage and Preservation of the MPU and Spare
Parts ................................................................................ 107
11 – Address and Contact Information........................ 113
12 – Appendix – Description of Legally Relevant
Parameters..................................................................... 114
13 – Related Publications ............................................. 120

Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 5
MPU Series C I/O/M Manual General
1 – General
1.1. Orientation Aids for the Manual
We have provided some orientation aids so that you can easily find the necessary
information in this manual.
The information in this manual ranges from imperative safety procedures and standard-
ized guidelines through to concrete handling procedures and advice. To differentiate
these more easily, the information is marked with corresponding pictograms in front of
the relevant text.
These are intended not just to draw particular attention to these passages, but also to
make it easier to find the information you want. Therefore, the pictograms are symbolic
of the underlying textual content.
The following pictograms are used in this manual:
Danger sign
Danger of explosions caused by easily ignited gases and liquids
here.
Risk of operating fault
Actions that may damage the equipment.
Legal notice
Actions that may have legal consequences.
Input necessary
e.g. via numeric or function keys.
Background information
Short-tip, e.g. See more information in Chapter 3.
Option
Special case.
Function
Functional description.
NOTE:
Indicates a special situation.
ATTENTION:
Particular attention is to be paid.
Lifting heavy loads

Page 6 • MNKS025 ║ Issue/Rev. 0.1 (11/18)
1.2. Safety Instructions
The MPU series of ultrasonic flowmeters are non-intrusive and transducers are flush
mounted to the internal meter body to provide for undisturbed and accurate measure-
ment of gas flow. They are suitable for a wide range of applications in fiscal metering
of dry, high pressure, and non-condensing gases.
Caution:
This information must be carefully read and observed before operating the unit.
The operator must ensure that the MPU and its equipment are operated and monitored
by expert and qualified personnel in such a way that there are no risks to employees
or third parties. Protection zones must be provided. The operator must draw up the
corresponding operating instructions so that the operating and maintenance personnel
have all of the necessary instructions for operation of the meter or the system.
The compatibility between media and meter or sealing material is the responsibility of
the operator.
The relevant national regulations in the country of installation for the operation of the
pressure equipment must be observed.
Abbreviation Description
AGA American Gas Association
ANSI American National Standards Institute
AI Analog Input
AO Analog Output
DDiameters (inside)
DI Digital Input
EN European Standard
DO Digital Output
HART Highway Addressable Remote Transducer Protocol
I/O Input/Output
Kb Kilo byte
Mb Mega byte
MPU Multi-Path Ultrasonic
PC Personal Computer
PE Protective Earth
SW Software
TRT Transducer Retraction Tool
UMCB Ultrasonic Meter Control Board
VOS Velocity of Sound
MPU Series C I/O/M Manual General

Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 7
MPU Series C I/O/M Manual General
1.2.1. Hints for Installation in Hazardous Area
All the components marked with the sign of are explosion-proof electrical equipment
and safety-tested and certified. See section 3.8 for electrical installation.
Caution:
Any interference, mechanical or electrical, is not permitted.
EX-protection regulations must be observed!
In case of a malfunction of the electronic board fitted in the flameproof housing only the
complete board has to be replaced. Test and repair of the board is only possible in the
factory. The installation and replacement of the board is the task of skilled personnel.
General hints:
• The electrical installation has to be compliant with EN 60079-14 and the ordinary
electric installation rules.
• To prevent ignition of hazardous atmospheres and to prevent electrical shock,
disconnect from supply circuits before opening. Protect the device against
unintended power on. Before bringing the device into operation make sure that it
is tightly closed.
• The flameproof housing contains one or more of the following threaded entries:
½” NPT. All cable entries, stopping boxes or plugs shall be certified according to
the requirements in EN / IEC 60079-1.
• The flameproof housing contains an internal battery-powered circuit. Do not open
the housing unless an area is known to be non-hazardous. To reduce the risk of
ignition of hazardous atmospheres, conduit runs must have a sealing fitting
connected within 45 cm of the enclosure.
• Before the first power up after installation check that the connected voltage is
conform to power rating on the name plate. Not used cable entries have to be closed
with certified plugs.
• The wiring has to be made according to the wiring diagrams which are part of this
manual.
• Modification of the internal construction of the flameproof and adding additional
parts to the electronic are not allowed
• Special precaution must be made when bringing the supplied Laptop / PC into
hazardous area. Provide for work permit before bringing the Laptop / PC into
restricted area, according the site regulations. A gas detector must be in operation
continuously while the Laptop / PC is present in the restricted area. This applies
also while it is switched off.
1.2.2. Danger from High Pressure and Explosive Gas
The MPU is directly integrated into gas-carrying pipelines. The operating company shall
be responsible for safe operation and for complying with additional national regulations.

Page 8 • MNKS025 ║ Issue/Rev. 0.1 (11/18)
Caution:
In plants with toxic and explosive gases, high pressure or high temperatures, the MPU
shall only be mounted and dismounted, if the pipelines are vented or if the plant is not
working.
The same applies to repair and service work which involves opening measuring channel
or the explosion-proof signal processing unit.
1.2.3. Temperature Drop and Depressurization
Please be aware that rapid temperature changes may damage the ultrasonic trans-
ducers and should be avoided. If the meters are subjected to a temperature change of
more than 5 degrees Celsius or 9 degrees Fahrenheit per 5 minutes transducers may
be damaged and may have to be replaced. This can also occur under rapid pressure
changes like emergency depressurization; therefore, the maximum rate of depressur-
ization is 10 bars per 5 minutes.
1.2.4. Lifting Heavy Loads
If using a crane when lifting the MPU, the certified lifting slings must be wrapped around
the meter, or use lifting lugs if available. Lifting and handling must always be performed
in accordance with MNKS020.
At offshore installations, it is very important to secure the meter during crane handling
due to motion on the platform or vessel resulting in pendulum motion of the load.
Do not fasten any lifting slings in the electronic connection box or its bracket.
1.2.5. Disposal
It is the operator’s responsibility to obtain the necessary information about all relevant
regulations and requirements from your local authorities. Ensure that the relevant ma-
terials are disposed of in an environmentally safe fashion.
The operator is responsible for ensuring compliance with all general and local regula-
tions which are in force at the time of disposal.
1.2.5.1. Disposal of a Functional Component or System
• When a functional component or system is taken out of service, we recommend that
it should be sorted into its different types of waste and then disposed of or recycled
as appropriate. Sort and separate iron, nonferrous metals, plastics, electronic waste,
etc.
• Fuels, grease, oil and objects or lines contaminated with them must be disposed
of separately.
1.2.6. Proper Intended Use
If the system is used exclusively for quality control in collaboration with measuring sys-
tems on tank trucks, the corresponding applicable safety regulations (e.g. protection)
must be complied with.
Any form of use which exceeds the scope described above is deemed to be improper
use; Smith Meter is not liable for damages resulting from such improper use.
MPU Series C I/O/M Manual General

Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 9
MPU Series C I/O/M Manual General
Proper use also includes compliance with the conditions set out by Smith Meter with
regard to operation, installation and maintenance.
The system must only be operated, serviced and repaired by personnel who are familiar
with the equipment and who have been trained regarding the dangers involved.
If you discover any signs of damage or breakage on any parts of the system or if the
system’s safe operation cannot be guaranteed for any other reason, do not start the
system or, if already in operation, shut down the system immediately. Notify your main-
tenance department.
Smith Meter cannot be held liable for any damages arising as a result of unauthorized
changes to the system.
1.3. Maintenance
The devices must not be modified mechanically or electronically in any way.
During cleaning with a steam cleaner or with pressurized water, the devices should be
protected from the water jet. Never aim the steam jet directly onto the devices!
We cannot accept responsibility for any damage caused by moisture in the equipment
as a result of improper cleaning procedures.
For all devices, a regular safety check in accordance with industrial safety regulations
must be carried out. Equipment and protective systems which fall under the scope of
Directive 2014/34/EU and are operated in hazardous areas are also classified installa-
tions. It is the international standard EN60079-17 observed and there are other, country-
specific policies, such as in Germany (Ordinance on Industrial Safety and Health) apply.
1.3.1. Recommended Maintenance Plan Check List
2 Years 5 Years 5-10 Years
Cleaning of the outside device required according to the degree of
contamination
X
Visual examination for damage and wear:
1. Check that there is no mechanical damage to the spool piece,
transducer cover or electronics enclosure
2. Check that there is no damage to transducer cables or the external
cables with cable glands.
X
Examination of the case mounting X
Check the cable X
O-Rings and Sealings X
Ex related tests according EN/IEC 60079-17 X
Change RTC battery X
For environmental conditions such as strong vibrations, strong temperature differences dur-
ing operation, unusually high degrees of contamination, which deviate from environmental
conditions typical for such measuring devices, the maintenance intervals must be shortened
in order to meet the increased environmental conditions.

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Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 11
MPU Series C I/O/M Manual Product Overview
2 – Product Overview
The Smith Meter MPUs are multi-path ultrasonic meters with Signal Processing Unit
(SPU) for custody transfer or custody transfer accuracy measurement of petroleum
products. The following ultrasonic meters are covered under this manual:
• MPU 200c – Single path flowmeter
• MPU 600c – Three path flowmeter
• MPU 800c – Four path flowmeter
• MPU 1600c – Eight path flowmeter
The difference between these models is the number of paths. All other parts are
identical. The MPU 1600c has 8 paths (16 transducers), MPU 800c has 4 paths (8
transducers), and MPU 600c has 3 paths (6 transducers) and the MPU 200c has 1 path
(2 transducers). All version use identical electronics with the appropriate number of
transducers connected. The MPU 800c and 600c are lower cost versions of the MPU
1600c with slightly lower measurement performance. The MPU 200c is made for
applications with non-fiscal accuracy requirements.
2.1. Purpose of Equipment
The MPU series of ultrasonic flowmeters are non-intrusive and transducers are flush
mounted to the internal meter body to provide for undisturbed and accurate measure-
ment of gas flow. They are suitable for a wide range of applications in fiscal metering
of dry, high pressure, and non-condensing gases, such as:
• Custody transfer of gas onshore and offshore
• Pipeline node bi-directional measurements
• Gas terminals
• Gas mixing stations
• Gas power plants
• Pipeline junctions
• Compressor stations
The MPU 1600c has fiscal accuracy with 5D straight upstream pipe and the MPU 800c
has fiscal accuracy with 10D straight upstream pipe and 5D downstream straight pipe.
The MPU 600c has fiscal accuracy with a well-developed flow profile, hence long (>20D)
upstream straight pipe or in combination with a flow conditioner.
The MPU 200c cannot be guaranteed for fiscal accuracy.
2.2. Measurement Principle
The Smith Meter MPU Ultrasonic Gas Flowmeters operate using the acoustic transit time
measurement principle. The meter transmits ultrasonic signals between two transduc-
ers that are located on opposite sides of the meter body. These two transducers form a
measurement path through the fluid with one transducer in the upstream position and the
other downstream. The Ultra Series meters can have three, four or eight measurement
paths depending on the model.
An ultrasonic signal that is transmitted from one transducer will travel through the fluid
medium and be received by the transducer on the opposite side of the path. Each trans-
ducer can either send or receive a signal and the meter alternates between sending
and receiving across the measurement path. [An ultrasonic pulse will travel through the
meter at the velocity of sound of the fluid in the meter plus or minus the velocity that fluid
medium itself.].

Page 12 • MNKS025 ║ Issue/Rev. 0.1 (11/18)
MPU Series C I/O/M Manual Product Overview
2.2.1. Transit Time Measurement
To measure gas flow and velocity of sound (VOS), the MPU employs the fact that sound
travels faster with the gas flow than against it. The figure below shows a top view of a
pipe with gas flow. The gas flow velocity is V, ϴ is the angle the sound beams make with
the pipe wall, A and B are the positions of the transducers and L is the distance between
transducer A and B. Tu and Td are the times of flight up- and downstream respectively.
These travel times, together with the geometry of the system, i.e. transducer mount-
ing and pipe diameter, are all that is needed to calculate the gas flow velocity and the
velocity of sound for each path.
V
A
B
θ
L Td
Tu
Top View of Path; Travel Times
The sound will travel slower upstream and faster downstream because of the velocity
component of the gas flow in the direction of the sound path. This yield
and
where c is the velocity of sound in the gas and v is the gas flow velocity.
)cos(
θ
vc
L
Td+
=
)cos(
θ
vc
L
T
u
−
=
du
du
TT
TT
L
v− ⋅= )cos(2
θ
du
du
TT
TT
L
c+ ⋅= 2
)cos(
θ
vc
L
Td+ =
)cos(
θ
vc
L
T
u
−
=
du
du
TT
TT
L
v− ⋅= )cos(2
θ
du
du
TT
TT
L
c+ ⋅= 2

Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 13
From these equations one can isolate the gas flow velocity and VOS. Thus:
and
2.2.2. Travel Time Corrections
The signal pulse in the transducers is converted from an electrical signal to an acous-
tic signal, and back to an electrical signal on the receiver side. The signal is delayed
during these conversions, and these transducer delays are measured for each trans-
ducer during internal testing. Typical magnitude of the transducer delays is 8-10µs.
2.2.3. Calculate Average Gas Flow Velocity
To calculate the average gas flow velocity over the pipe area, information from all sound
paths, including transducer delays, are put into an integration formula.
Figure 9 shows a front view of the pipe, with the placement of the 8 sound paths in the
4 planes for the MPU 1600. The average velocity is given by:
∑
=
⋅=
8
1i
ii vwv
where wi is the weighting factors and vi is the average gas flow velocity for each path.
Similar equations are used for the MPU 800, MPU 600 and the MPU 200. Front view
of pipe, showing internal positions of the paths:
Va
Vt
0
1
α1
α0
By checking the direction and magnitude of the transverse flow components in the two
upper planes, the flow regime can be determined, as shown in picture on next page.
MPU Series C I/O/M Manual Product Overview
)cos(
θ
vc
L
Td+ =
)cos(
θ
vc
L
T
u
−
=
du
du
TT
TT
L
v
−
⋅= )cos(2
θ
du
du
TT
TT
L
c+ ⋅= 2
)cos(
θ
vc
L
Td+ =
)cos(
θ
vc
L
T
u
−
=
du
du
TT
TT
L
v− ⋅= )cos(2
θ
du
du
TT
TT
L
c
+
⋅= 2

Page 14 • MNKS025 ║ Issue/Rev. 0.1 (11/18)
2.2.4. MPU Series Flowmeter Features
• Custody Transfer Accuracy – The MPUs combine the latest in ultrasonic design,
sensitivity analysis, integration methods and signal processing optimization to deliver
accurate custody transfer measurement.
• Measurement Stability – The path configuration and integration algorithms give
superior flow profile correction and compensation for swirl and crossflow over a wide
range of operating conditions.
• Field Proven Electronics – The MPU Series meter designs use the proven know- how
in ultrasonic measurement and microprocessor-based instrumentation for harsh
outdoor petroleum applications from Smith Meter.
• Excellent Noise Immunity – The software and transducers are designed to operate in
difficult applications with attenuation and noise for excellent performance in
challenging applications.
• Automatic Compensation for Path Loss – In the unlikely event that a transducer
should fail, the software will automatically compensate for the loss in path information,
with reduced accuracy, in addition to advising the operator that an alarm is present.
• Reciprocity – Optimum transducer and electronics design ensures full reciprocity and
zero influences on linearity, independent of pressure, temperature and transducer
aging.
2.2.5. Applications
Measurement of hydrocarbon liquids for:
• Custody Transfer
• Allocation
• Leak Detection
• Inventory Control
• Off-loading and On-loading
MPU Series C I/O/M Manual Product Overview

Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 15
MPU Series C I/O/M Manual Operation of MPU
3 – Operation of MPU
3.1. Major Components of the Ultrasonic Flowmeter
MPU gas flowmeters consist of the following components:
• Meter Body
• Measurement Paths
• MPU800 consists of 4 measurement paths in four chordal planes
• MPU1600 consists of 8 measurement paths in eight chordal planes
• Transducer Assemblies, two per measurement path
• Cables
• Electronics Assembly consisting of:
• Electronics Enclosure
• UMCB (Ultrasonic Meter Control Board)
3.2. Identification and Marking
In order to perform correct installation, it is important that the correct ultrasonic meter
and its ultrasonic signal paths are identified.
Item Markings
Spool Piece Serial number of the MPU.
Adapter / Spool Piece Transducer position number.
Electronics Enclosure Name plates with:
Serial number of the MPU.
Tag. number according to customer requirements.
Electrical classication.
Operational conditions.
Spool piece data.
Transducer Serial number of the transducer (not visible while mounted).
Transducer Cable Marked with Number 1 and 2 on the strands
Transducer Adapter Electronic
1A Position 1A 1A
1B Position 1B 1B
2A Position 2A 2A
2B Position 2B 2B
3A Position 3A 3A
3B Position 3B 3B
4A Position 4A 4A
4B Position 4B 4B
5A Position 5A 5A
5B Position 5B 5B
6A Position 6A 6A
6B Position 6B 6B
7A Position 7A 7A
7B Position 7B 7B
8A Position 8A 8A
8B Position 8B 8B

Page 16 • MNKS025 ║ Issue/Rev. 0.1 (11/18)
MPU Series C I/O/M Manual Operation of MPU
3.3. Receipt of Equipment
When the equipment is received, the outside packing case should be checked immediately
for any shipping damage. If the packing case has been damaged, the local carrier should
be notified at once regarding their liability. Carefully remove the unit from its packing case
and inspect for damaged or missing parts.
If damage has occurred during shipment or parts are missing, a written report should be
submitted to the Customer Service department by using the contact information at the
beginning of this manual.
Prior to installation, the unit should be stored in its original packing case and protected
from adverse weather conditions and abuse. Throughout the installation process, the
electronics should be protected from adverse weather conditions.
3.4. Pre-Installation Inspection
Visually inspect the meter and meter nameplate to ensure the proper size, model number,
flange rating and flow range. Note the direction of forward flow (described by an arrow)
to determine the installation orientation.
Ultrasonic flowmeters are precise measuring instruments and should be treated as such.
Install the unit carefully. When transporting the meter, make certain it is not subjected to
any severe shock as electronic components may be damaged. Cover flange openings
to protect the internal diameter of the meter body. Lift the meter only by the lifting eyes
located on each flange. DO NOT lift or move the meter by way of the cabling or conduit
system. DO NOT lift or move the meter by inserting a forklift tine into the internal diameter
of the meter.
• If the MPU TRT transducer retraction tool is to be used, at least 2 meters of space
on both sides of the MPU is required. 2 meters of space is also required on both sides
of the piping 1 meter upstream and 1 meter downstream of the MPU.
• For one upstream bend configuration, a flow straightener is usually not required.
Please contact supplier for advice.
• For multiple upstream bend configurations, a flow straightener may be required.
Please contact supplier for advice.
• According to customer requirements, insulation to maintain a stable gas temperature
may be done.

Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 17
3.4.1. Mechanical Inspection
Preferably, the original protection covers should still be intact. These may now be removed.
Before the spool piece is mounted in the pipeline the following must be controlled:
• The inside surface must be clean and dry. Use rags or similar to remove preservative.
Make sure no preservative is left in the transducer ports, as this may affect the
measurements.
• Check the flanges for damage. There must not be any damage to the gasket surfaces.
• Make sure that there is no damage to the meter, check the electronics enclosure,
cable glands, transducer cables, transducer end covers etc.
• Check that the positive flow direction indicated on the name plate is in the same
direction as the defined positive flow direction of the site.
• Use the correct type of flange gaskets, and make sure there is no damage to the
gaskets.
The support legs are threaded and may be removed after installation. They should be
stored and remounted before possible removal of the meter.
3.4.2. Installation of the Spool Piece
In most cases the spool piece is to be installed at a predetermined location in the piping
system. The size, material and flange type of the spool piece is manufactured to comply
with the existing piping. The size and type of bolts and gaskets must comply with the pip-
ing specifications. It is a condition for the installation that general knowledge about how
to install pipe work is held by the dedicated professionals.
Lifting lugs should be removed after installation in order not to be used if the MPU is to
be removed after years in operation.
3.4.3. Equipment and Tools Required
The following tools and equipment are necessary to perform a safe and correct installa-
tion of the spool piece:
• Crane or forklift
• Certified lifting slings
• Hydraulic tools for correct torque of the bolts
• Rags for cleaning of inside surface
• Necessary gasket lubricant
• Bolt lubricant
The size of some of the tools will depend on the flange type and size. Check weight and
pressure rating on the spool piece to get suitable equipment.
1. Use a forklift or a crane to place the meter in its position in the pipeline.
2. While a few bolts are fastened on both sides, check that the gaskets have entered
correctly.
3. Enter the remaining bolts.
4. Use the hydraulic tools and set the torque according to the pressure rating of the
flanges.
5. Pressurize the pipeline and check for leakage.
MPU Series C I/O/M Manual Operation of MPU

Page 18 • MNKS025 ║ Issue/Rev. 0.1 (11/18)
MPU Series C I/O/M Manual Operation of MPU
3.5. Mechanical Installation
Installation of the MPU flowmeter should follow good piping practices, such as alignment
of the pipe center lines before installing the meter in order to minimize compressive,
tensile or torsional stresses placed on the meter. A temporary, straight pipe spool can
be used to align the process piping prior to meter installation if required. Do not use the
meter to align the piping.
It is important that no portion of the gasket intrude into the ID of the pipe. This could
cause a distorted flow profile in the meter that will affect the performance and stability of
the measurement.
Gasket, bolt and nut materials selected must be compatible with the application environ-
ment and specifications. Pipe supports should be installed upstream and downstream
of the meter to provide sufficient support of the process piping, in accordance with good
piping practices.
It is recommended that the meter be installed in the section of piping where the pressure
is highest, downstream from pumps and upstream from flow control valves. When it is
expected that flow will be intermittent, the meter should not be mounted at or near a low
point or high point in the piping. Solids or water will settle in a low point in the piping; gas
will accumulate in a high point in the piping. Both of these conditions may impede proper
meter operation.
The installation instructions described herein are intended to be general recommendations
and, therefore, may require modification to fit your specific application.
Warning: Care must be taken in the installation of the meter. The installer must comply
with all national, regional, and local codes.
3.6. Handling of Flowmeter
Do not lift the flowmeter by the electronics box. Use the lifting lugs that are attached to
the flanges. Reference Bulletin MNKS020.
3.7. Flow Conditioning
3.7.1. MPU 800 Recommended Installation
The recommended installation for the MPU 800c is 10D upstream straight run. For optimum
performance it is recommended to keep partial restrictions or variable flow diversions such
as control valves away from the upstream area. Consult factory for an evaluation in the
case of a complex upstream piping geometry. When using flow conditioning the meter
should be installed a minimum of 5D from the flow conditioner outlet.
The meter run must be the same pipe diameter as the meter inlet and concentrically cen-
tered so that neither the pipe edge nor gasket protrude into the flow stream. For correct
centering it is recommended to use the centering dowel pin provided on the meter flange.

Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 19
MPU Series C I/O/M Manual Operation of MPU
3.7.2. MPU 1600 Recommended Installation
The recommended installation for the MPU 1600C is 5D upstream straight run. For opti-
mum performance it is recommended to keep partial restrictions or variable flow diversions
such as control valves away from the upstream area. Consult factory for an evaluation in
the case of a complex upstream piping geometry. When using flow conditioning the meter
should be installed a minimum of 5D from the flow conditioner outlet.
The meter run must be the same pipe diameter as the meter inlet and concentrically cen-
tered so that neither the pipe edge nor gasket protrude into the flow stream. For correct
centering it is recommended to use the centering dowel pin provided on the meter flange.

Page 20 • MNKS025 ║ Issue/Rev. 0.1 (11/18)
MPU Series C I/O/M Manual Operation of MPU
3.8. Electrical Installation
Electrical Installation General Requirements
(a) It is imperative that the electrical installation be performed by a competent individual
that is familiar with associated risks involved with the installation, operation, and main-
tenance, of electrical equipment in hazardous (classified) locations. This individual must
possess knowledge of local, national electrical codes, and/or ordinances concerned with
hazardous location safety requirements. It is recommended (may be required in some
jurisdictions) that the final installation should be verified / inspected by the authority having
jurisdiction before placing the equipment into service.
Electrical installations in hazardous areas have features specifically designed to make
them suitable for use in such locations and it is the operator’s responsibility to maintain
the integrity of those special features.
The operator must ensure that electrical equipment is:
• Installed and operated correctly
• Monitored on a regular basis
• Maintained with due regard to safety
(b) Be sure all connections on the terminal blocks are tight.
(c) All shields must be properly terminated on one end only to prevent ground loops.
All exposed shields must be properly insulated to prevent short circuits to other terminals
or to the chassis. The shield at the device (e.g., temperature device, transmitter, etc.) must
be cut back to the insulation and taped off. All shields should be continuous. If splices are
required, they must be soldered and properly insulated. If other communicating devices
are used with the MPU, refer to the manual for that unit for shielding information. Shields
for other communicating equipment should not be terminated in the MPU.
Special conditions for safe use:
• Select wiring and cable glands suitable for 90°C operation.
• Contact manufacturer at address listed for information on the dimensions of the
flameproof joints.
Germany Operations
Smith Meter GmbH
Regentstrasse 1
25474 Ellerbek, Germany
Or
FMC Technologies Measurement Solutions Inc.
1602 Wagner Avenue Erie, Pennsylvania 16510 USA
• When Housing Model UMC - E - (A or S) - (P or H) - ... is used, the pedestal mount
base shall provide a maximum 0.9246 in. (23.485 mm) O.D. for interface with an
enclosure covered by ATEX Certificate DEMKO 09 ATEX 0907098X and IECEx
Certificate IECEx UL 09.0023X with the required dimensions listed below. This joint
will be factory made and the two ATEX / IECEx certified products will always be
shipped together.
Required Dimensions:
Maximum Diametrical Clearance= 0.003 in. (.076 mm.) Minimum Length= 0.5 in. (12.7
mm.)
• The joints described above are held in place by use of two Allen head cap screws,
DIN 912-A4-70 or DIN 912-A2-70, inserted through the Retaining Flange and threaded
into the pedestal mount base.