Armstrong AVF User manual

Armstrong AVF and AVI Vortex Meter
Installation and Operation Manual
359-EN V1.0
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these instructions.

2Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
Customer Notice for Oxygen Service
2
Notice to Users
Warning based on Electric Appliances Safety Control Act of Korea. This product should be handled as electromagnetic
radiation emitting equipment, and is intended for use by industrial dealers and end-users. It is not for residential use.
NIST Standard Reference Database 23, NIST Reference Fluid Thermodynamic and Transport Properties: REFPROP
Version 9.x. Standard Reference Databases are copyrighted by the U.S. Secretary of Commerce on behalf of the United
States of America. All rights reserved. No part of the database may be reproduced, stored in a retrieval system or
transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without prior
permission.
Unless you have specifically ordered Armstrong’s optional O2cleaning, this flow meter may not be fit for oxygen
service. Some models can only be properly cleaned during the manufacturing process. Armstrong International is not
liable for any damage or personal injury, whatsoever, resulting from the use of Armstrong’s standard vortex meters for
oxygen gas.
Specic Conditions of Use
(ATEX/IECEx)
Contact Manufacturer regarding Flame path information.
Clean with a damp cloth to avoid any build-up of electrostatic charge.
The Armstrong AVF and AVI Vortex Flowmeters standard temperature option (ST) process temperature range is -40°C
to 260°C. The high temperature option (HT) process temperature range is -40°C up to +400°C.
AVF Vortex Flowmeters Process Temperatures
Tmax
(Process)
Temperature Class Value (Gas)
ST Version HT Version
80°C T6 85°C
95°C T5 100°C
130°C T4 135°C
195°C T3 200°C
260°C T2 300°C
400°C N/A 405°C

Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information. 3
Table of Contents
Chapter 1 Introduction
AVF and AVI Vortex Mass Flow Meters.......................... 7
Using this Manual.......................................................... 7
Note and Safety Information ......................................... 8
Receipt of System Components ................................... 8
Technical Assistance ..................................................... 8
How the Pro-V Vortex Meter Operates .......................... 9
Velocity Measurement .................................................. 9
Vortex Shedding Frequency .......................................... 9
Vortex Frequency Sensing ............................................ 10
Flow Velocity Range ...................................................... 10
Pressure Drop ............................................................... 11
Minimum Back Pressure ............................................... 12
Temperature Measurement ........................................... 12
Pressure Measurement ................................................. 12
Flow Meter Configurations ............................................ 12
Multivariable Options .................................................... 13
Line Size / Process Conditions / Materials .................... 13
Flow Meter Electronics ................................................. 13
Chapter 2 Installation
Installation Overview ..................................................... 14
Flow Meter Installation Requirements .......................... 14
Unobstructed Flow Requirements ................................. 15
Series AVF In-Line Flow Meter Installation ................... 16
Wafer-Style Flow Meter Installation .............................. 17
Flange-Style Flow Meter Installation ............................. 18
Series AVI Insertion Flow Meter Installation ................. 19
Cold Tap Guidelines ....................................................... 20
Hot Tap Guidelines ........................................................ 21
Flow Meter Insertion ..................................................... 22
Installing Meters with a Compression Connection ........ 23
Installing Meters with a Packing Gland Connection ...... 25
Installing Meters (Packing Gland), No Insertion Tool ... 28
Adjusting Meter Orientation .......................................... 30
Display/Keypad Adjustment .......................................... 30
Enclosure Adjustment ................................................... 31
Loop Power Flow Meter Wiring Connections ................ 32
Input Power Connections ............................................. 32
4-20 mA Output Connections ....................................... 33
Pulse Output Connections ............................................ 34
Frequency Output Connections ..................................... 35
Optional Backlight Connections .................................... 35
Remote Electronics Wiring ........................................... 36
High Power Flow Meter Wiring Connections ................ 38
Input Power Connections ............................................. 38
4-20 mA Output Connections ....................................... 40
Frequency Output Connections ..................................... 41
Pulse Output Connections ............................................ 42
Alarm Output Connections ............................................ 44
Remote Electronics Wiring ........................................... 45
Optional Input Electronics Wiring ................................. 46
Optional Energy EMS RTD Input Wiring ....................... 46
Optional External 4-20 mA Input Wiring ....................... 47
Optional Contact Closure Input Wiring ......................... 48

4Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
Table of Contents
Chapter 3 Operating Instructions
Flow Meter Display/Keypad ........................................................................ 49
Start Up ..................................................................................................... 50
Run Mode Screens .................................................................................... 50
Using the Setup Menus ............................................................................. 51
Programming the Flow Meter .................................................................. 52
Output Menu ............................................................................................ 53
Display Menu ........................................................................................... 55
Alarms Menu ........................................................................................... 56
Totalizer #1 Menu .................................................................................... 57
Totalizer #2 Menu .................................................................................... 58
Energy Menu ........................................................................................... 59
Fluid Menu ............................................................................................... 60
Units Menu .............................................................................................. 61
Time and Date Menu ............................................................................... 62
Diagnostics Menu .................................................................................... 63
Calibration Menu ..................................................................................... 64
Password Menu ....................................................................................... 65
Chapter 4 Serial Communications
HART™ Communications ........................................................................... 66
Wiring ...................................................................................................... 66
HART Commands with the DD Menu ...................................................... 68
HART Commands with Generic DD Menu ............................................... 73
MODBUS Communications ........................................................................ 76
Wiring ...................................................................................................... 76
Menu Items ............................................................................................. 77
Register Definitions ................................................................................. 79
BACNET™ MSTP Communications ............................................................ 86
BACNET MSTP Description ..................................................................... 86
Baud Rates on the MS/TP Bus ................................................................ 86
Supported BACnet Objects ...................................................................... 87
ANNEX - BACnet Protocol Implementation Conformance Statement ...... 93
Acronyms and Definitions ....................................................................... 99
Chapter 5 Troubleshooting and Repair
Hidden Diagnostics Menus ........................................................................ 100
Level One Hidden Diagnostics Values ........................................................ 102
Level Two Hidden Diagnostics Values ........................................................ 104
Analog Output Calibration .......................................................................... 105
Troubleshooting the Flow Meter ................................................................ 106
First Check Items ....................................................................................... 106
Record Values ............................................................................................ 106
Determine the Fault .................................................................................... 108
Symptom: Output at no Flow ..................................................................... 108
Symptom: Erratic Output ........................................................................... 108
Symptom: No Output ................................................................................. 109
Symptom: Meter Displays Temperature Fault ............................................ 110
Symptom: Meter Displays Pressure Fault................................................... 110
Electronics Assembly Replacement ........................................................... 111
Pressure Sensor Replacement (Series AVF Only) ...................................... 112
Returning Equipment to the Factory .......................................................... 112

Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information. 5
Table of Contents
Figures continued
2-42 High Power Flow Meter Junction Box ................................. 45
2-43. Optional Energy EMS RTD Input Wiring ............................. 46
2-44. External 4-20 mA Input Wiring – External Power Supply ... 47
2-45. External 4-20 mA Input Wiring – DC Powered Meter ......... 47
2-46. External 4-20 mA Input Wiring – AC Powered Meter ......... 48
2-47. Optional External Contact Closure Input Wiring ................. 48
3-1. Flow Meter Display/Keypad .................................................. 49
4-1. Loop Powered Meter Wiring (HART) .................................... 66
4-2. DC Powered Meter Wiring (HART) ....................................... 67
4-3. AC Powered Meter Wiring (HART) ....................................... 67
4-4. RS-485 Wiring (MODBUS) ................................................... 76
5-1. Electronics Stack Sensor Connections ................................. 109
5-2. Remote Feed Through Board Sensor Connections ............... 109
5-3. Vortex Sensor Connector ..................................................... 109
5-4. Temperature Sensor Connector ............................................ 110
5-5. Pressure Sensor Connector ................................................. 110
Tables
4-1. Byte Order (MODBUS) ........................................................ 77
4-2. Register Definitions (MODBUS) .......................................... 80
Appendix A Product Specifications
Appendix B Approvals
Appendix C Flow Meter Calculations
Appendix D Glossary
Figures
1-1. In-Line Vortex Multi-Parameter Mass Flow Meter .................... 9
1-2. Measurement Principle of Vortex Flow Meters.......................... 9
1-3. Reynolds Number Range of the Pro-V ..................................... 11
2-1. Recommended Pipe Length Required for Installation .............. 15
2-2. Flange Bolt Torquing Sequence ................................................ 16
2-3. Wafer-Style Flow Meter Installation .......................................... 17
2-4. Flange-Style Flow Meter Installation ......................................... 18
2-5. Hot Tap Sequence .................................................................... 21
2-6. Insertion Calculation (Compression Type) ................................ 23
2-7. Flow Meter with Compression Type Fitting .............................. 24
2-8. Insertion Calculation (Meters with Insertion Tool) ................... 25
2-9. Flow Meter with Permanent Insertion Tool ............................... 26
2-10. Flow Meter with Removable Insertion Tool ............................ 27
2-11. Insertion Calculation (Meters without Insertion Tool) ............ 28
2-12. Display/Keypad Viewing Adjustment ...................................... 30
2-13. Enclosure Viewing Adjustment ............................................... 31
2-14. Loop Power Wiring Terminals ................................................ 32
2-15. DC Power Connections ........................................................... 32
2-16. Load Resistance Versus Input Voltage ................................... 33
2-17. Isolated Pulse Output Using External Power Supply .............. 34
2-18. Non-Isolated Pulse Output Using External Power Supply ...... 34
2-19. Isolated Frequency Output Using External Power Supply ...... 35
2-20. Non-Isolated Freq. Out. Using External Power Supply ........... 35
2-21. Backlight Using External Power Supply .................................. 35
2-22. Loop Power Volumetric Flowmeter Junction Box .................. 36
2-23. Loop Power Volumetric Flowmeter Junction Box Prior .......... 37
2-24. Loop Power Mass Flowmeter Junction Box ........................... 37
2-25. AC Wiring Terminals ............................................................... 38
2-26. AC Power Connections ........................................................... 38
2-27. DC Wiring Terminals .............................................................. 39
2-28. DC Power Connections ........................................................... 39
2-29. Load Resistance Versus Input Voltage ................................... 40
2-30. Isolated 4-20 Output Using External Power Supply ............... 40
2-31. Non-Isolated 4-20 Output Using Input Power Supply ............ 41
2-32. Isolated 4-20 Output Using Meter Power Supply (AC only).... 41
2-33. Isolated Frequency Output Using External Power Supply ...... 41
2-34. Non-Isolated Frequency Output Using Input Power Supply .... 42
2-35. Isolated Freq. Out. Using Meter Power Sup. (AC only) .......... 42
2-36. Isolated Pulse Output Using External Power Supply .............. 43
2-37. Non-Isolated Pulse Output Using Input Power Supply ........... 43
2-38. Isolated Pulse Output Using Meter Power Sup. (AC only) ..... 43
2-39. Isolated Alarm Output Using External Power Supply ............. 44
2-40 Non-Isolated Alarm Output Using Meter Power Supply .......... 44
2-41 Isolated Alarm Output Using Meter Power Sup. (AC only) ...... 45

6Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
Warnings and Cautions
Warning!
Consult the flow meter nameplate for specific flow meter approvals before any hazardous location installation.
Hot tapping must be performed by a trained professional. U.S. regulations often require a hot tap permit. The
manufacturer of the hot tap equipment and/or the contractor performing the hot tap is responsible for providing proof
of such a permit.
All flow meter connections, isolation valves and fittings for cold/hot tapping must have the same or higher pressure
rating as the main pipeline.
For Series AVI insertion flow meter installations, an insertion tool must be used for any installation where a flow meter
is inserted under pressure greater than 50 psig.
To avoid serious injury, DO NOT loosen a compression fitting under pressure.
To avoid potential electric shock, follow National Electric Code or your local code when wiring this unit to a power
source. Failure to do so could result in injury or death. All AC power connections must be in accordance with published
CE directives. All wiring procedures must be performed with the power Off.
Before attempting any flow meter repair, verify that the line is not pressurized. Always remove main power before
disassembling any part of the mass flow meter.
Caution!
Calibration must be performed by qualified personnel. Armstrong International strongly recommends that you return
your flow meter to the factory for calibration.
In order to achieve accurate and repeatable performance, the flow meter must be installed with the specified minimum
length of straight pipe upstream and downstream of the flow meter’s sensor head.
When using toxic or corrosive gases, purge the line with inert gas for a minimum of four hours at full gas flow before
installing the flow meter.
For Series AVI insertion flow meter installations, the sensor alignment pointer must point downstream in the direction
of flow.
The AC wire insulation temperature rating must meet or exceed 85°C (185°F)

Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information. 7
Chapter 1 Introduction
AVF and AVI Multi-Parameter Vortex Mass Flow Meters
Armstrong International’s AVF In-Line and AVI Insertion Vortex Flow Meters provide a reliable solution for process flow
measurement. From a single entry point in the pipeline, vortex meters offer precise measurements of mass or volumetric
flow rates.
Multi-Parameter Mass Flow Meters
Mass flow meters utilize three primary sensing elements: a vortex shedding velocity sensor, an RTD temperature sensor,
and a solid state pressure sensor to measure the mass flow rate of gases, liquids, and steam.
Meters are available as loop powered devices or with up to three 4-20 mA analog output signals for monitoring your
choice of the five process variables (mass flow, volumetric flow, temperature, pressure and fluid density). The Energy
Monitoring option permits real-time calculation of energy consumption for a facility or process.
Volumetric Flow Meters
The primary sensing element of a volumetric flow meter is a vortex shedding velocity sensor. Meters are loop powered.
The analog 4-20 mA output signal offers your choice of volumetric or mass flow rate. Mass flow rate is based on a
constant value for fluid density stored in the instrument’s memory.
Both the mass and volumetric flow meters are supplied with a local keypad/display which provides instantaneous flow
rate, total, and process parameters in engineering units. A pulse output signal for remote totalization and MODBUS
or HART communications are also available. Pro-V digital electronics allows for easy reconfiguration for most gases,
liquids and steam. The Armstrong AVF and AVI meters’ simple installation combines with an easy-to-use interface that
provides quick set up, long term reliability and accurate mass flow measurement over a wide range of flows, pressures
and temperatures.
Using This Manual
This manual provides information needed to install and operate both the AVF In-Line and AVI Insertion Flow Meters.
• Chapter 1 includes the introduction and product description
• Chapter 2 provides information needed for installation
• Chapter 3 describes system operation and programming
• Chapter 4 provides information on HART and MODBUS protocols
• Chapter 5 covers troubleshooting and repair
Appendix A - Product Specifications, Appendix B – Approvals,
Appendix C – Flow Meter Calculations, Appendix D – Glossary of Terms

8Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
Installation
Note and Safety Information
We use note, caution and warning statements throughout this book to draw your attention to important information.
Warning!
This statement appears with information that is important to protect people and equipment from damage.
Pay very close attention to all warnings that apply to your application.
Caution!
This statement appears with information that is important for protecting your equipment and performance.
Read and follow all cautions that apply.
Note
This statement appears with a short message to alert you to an important detail.
Receipt of System Components
When receiving an Armstrong mass flow meter, carefully check the outside packing carton for damage incurred in
shipment. If the carton is damaged, notify the local carrier and submit a report to the factory or distributor. Remove
the packing slip and check that all ordered components are present. Make sure any spare parts or accessories are not
discarded with the packing material. Do not return any equipment to the factory without first contacting Armstrong
Customer Service.
Technical Assistance
If you encounter a problem with your flow meter, review the configuration information for each step of the
installation, operation and set up procedures. Verify that your settings and adjustments are consistent with factory
recommendations. Refer to Chapter 5, Troubleshooting, for specific information and recommendations.
If the problem persists after following the troubleshooting procedures outlined in Chapter 5, contact Armstrong
International, VERIS Flow Measurement Group at [phone]. When calling Technical Support, have the following
information on hand:
• the serial number (marked on the meter nameplate)
• the problem you are encountering and any corrective action taken
• application information (fluid, pressure, temperature and piping configuration)

Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information. 9
How the Vortex Mass Flow Meter Operates
Velocity Measurement
The vortex velocity sensor is a patented mechanical design that minimizes the effects of pipeline vibration and pump
noise, both of which are common error sources in flow measurement with vortex flow meters.
The velocity measurement is based on the well-known Von Karman vortex shedding phenomenon. Vortices are shed
from a shedder bar, and the vortex velocity sensor located downstream of the shedder bar senses the passage of
these vortices. This method of velocity measurement has many advantages including inherent linearity, high turndown,
reliability and simplicity.
Vortex Shedding Frequency
Von Karman vortices form downstream of a shedder bar into two distinct wakes. The vortices of one wake rotate
clockwise while those of the other wake rotate counterclockwise. Vortices generate one at a time, alternating from the
left side to the right side of the shedder bar. Vortices interact with their surrounding space by over-powering every other
nearby swirl on the verge of development. Close to the shedder bar, the distance (or wave length) between vortices
is always constant and measurable. Therefore, the volume encompassed by each vortex remains constant, as shown
below. By sensing the number of vortices passing by the velocity sensor, the AVF or AVI flow meter computes the total
fluid volume.
Figure 1-2. Measurement Principle of Vortex Flow Meters
Figure 1-1. In-Line Vortex Multi-Parameter Mass Flow Meter
Armstrong AVF and AVI
Multi-Parameter Vortex Mass Flow Meters use a unique
sensor head to monitor mass flow rate by directly
measuring three variables–fluid velocity, temperature
and pressure.
The built-in flow computer calculates the mass flow
rate and volumetric flow rate based on these three
direct measurements. The velocity, temperature and
pressure sensing head is built into the vortex meter’s
flow body. To measure fluid velocity, the flow meter
incorporates a bluff body (shedder bar) in the flow
stream and measures the frequency of vortices created
by the shedder bar. Temperature is measured using
a platinum resistance temperature detector (PRTD).
Pressure measurement is achieved using a solid-state
pressure transducer. All three elements are combined
into an integrated sensor head assembly located
downstream of the shedder bar within the flow body.

10 Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
How the Vortex Mass Flow Meter Operates
Vortex Frequency Sensing
The velocity sensor incorporates a piezoelectric element that senses the vortex frequency. This element detects
the alternating lift forces produced by the Von Karman vortices flowing downstream of the vortex shedder bar. The
alternating electric charge generated by the piezoelectric element is processed by the transmitter’s electronic circuit to
obtain the vortex shedding frequency. The piezoelectric element is highly sensitive and operates over a wide range of
flows, pressures and temperatures.
Flow Velocity Range
To ensure trouble-free operation, vortex flow meters must be correctly sized so that the flow velocity range through the
meter lies within the measurable velocity range (with acceptable pressure drop) and the linear range.
The measurable range is defined by the minimum and maximum velocity using the following table.
Gas Liquid
Vmin
Vmax
0.5 in
0.75 in
1 in
1.5 in and greater
5
√density (Lb/ft3)
175 ft/s
250 ft/s
250 ft/s
300 ft/s
1 ft/s
30 ft/s
30 ft/s
30 ft/s
30 ft/s
English p(lb/ft3)
Vmin
Vmax
DN15
DN20
DN25
DN40 and greater
6.1
√density (kg/m3)
53 m/s
76 m/s
76 m/s
91 m/s
0.3 m/s
91 m/s
91 m/s
91 m/s
91 m/s
Metric p(kg/m3)
The linear range is defined by the Reynolds number. The Reynolds number is the ratio of the inertial forces to the viscous
forces in a flowing fluid and is defined as:
Where:
Re = Reynolds Number
p = mass density of the fluid being measured
V = velocity of the fluid being measured
D = internal diameter of the flow channel
µ = viscosity of the fluid being measured
p V D
µ
RE =
ft/s
m/s