Armstrong AMF User manual

Armstrong Electromagnetic Flowmeter
Installation & Operations Manual
476-EN V1.1
Please read and save
these instructions
Remote Type
Integral Type

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2
WARNING!
Read the declaration carefully before starting any other action!
Local safety regulations must be applied!
CAUTION!
Attention! Damage could occur to the device if handled inappropriately.
The following conventions are used through this manual:

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2
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Dimensions and Pressure Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 Flow Measurement Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.5 Typical Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6 Product Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.7 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.0 Installation and Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.4 Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.5 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.6 Quick Start Menu Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.0 Menu Windows & Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2 Table of Parameter Setting Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2 Table of Parameter Setting Menu - continued . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.3 Parameter Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.0 Warranty and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3 Software Upgrade Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Appendices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Appendix A - MODBUS COMMUNICATION PROTOCOL . . . . . . . . . . . . . . . . . . . . 30
Appendix B - HART COMMUNICATION PROTOCOL . . . . . . . . . . . . . . . . . . . . . . . . . 33
Appendix C - PROFIBUS COMMUNICATION PROTOCOL . . . . . . . . . . . . . . . . . . . 34
Appendix D - EARTH GROUNDING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
LIGHTNING PROTECTION NOTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Appendix E - FLOW SENSOR INSTALLATION RECOMMENDATIONS . . . 37
Limited Warranty and Remedy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table of Contents

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4 3
1.0 Introduction
1.1 Preface
The Armstrong Electromagnetic Flowmeter (AMF) is designed to be installed in a fixed location for long-term, high accuracy
flow measurement.
Operation of the AMF is based on the electromagnetic induction law of Faraday. The AMF is used to measure the volume
flow of conductive fluids in a closed pipeline. Examples of applicable liquids are: water, salt water, sewage, pulps, slurry,
acid, alkali, or any mixture of liquids and solids which have a specific minimum of electric conductivity. The AMF is widely
used in municipal and industrial liquid processes which include wastewater treatment, irrigation, pharmaceutical, chemical,
metallurgical mining, and food and beverage.
Manufactured under strict standards, the AMF is produced to cover a broad range of crucial applications. The AMF’s
construction from high grade steel and weatherproof design, ensure the unit will remain both reliable and robust. With a
microprocessor and exclusive integrated circuit, Armstrong’s Electromagnetic Flowmeter has the advantages of reliable
performance, high accuracy, easy to use, and more. The Pulse, RS-232, RS-485, PROFIBUS, HART, BACnet or LonWorks
communication interfaces together with MODBUS support and power surge protection makes the AMF an ideal device for
reliable flowmeter networking.

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4
1.2 Features
*Structure Type:
Integral type or remote type
* Accuracy:
Standard version: ±0.5% of reading
High-accuracy version: ±0.25% of reading
Accuracy not affected by variation of flow density,
viscosity, temperature, pressure and conductivity
* Flow measuring range:
0.1m/s to 15m/s (0.3ft/s to 49ft/s), bi-directional
* Display and Buttons:
Large LCD display backlight. Displays the instantaneous
flow, total flow, and alarm.
* Totalizer:
Three built-in totalizers: forward flow totalizer, reverse flow
totalizer and net totalizer
* Security:
Keypad can be locked with password
* No pressure drop, no disturbance to the flow
* Medium Temperature:
- Integral Type: -10 °C - +80°C (14°F - 176°F)
- Remote Type:
Neoprene & Polyurethane Liner: -10 °C -
+80°C (14°F - 176°F); PTFE Liner: -10 °C -
+150°C (14°F - 302°F)
* Ambient Temperature:
-10°C ~ +60°C * Ambient Humidity:
5 ~ 90% RH (relative humidity)
* Medium Electrical Conductivity: ≥ 5us/cm
* Protection Class:
- For Main Unit: IP65 (outdoor)
- For Sensor: IP65 (outdoor) or IP68
(submersible, only for remote type)
*Power Supply:
85VAC-250VAC; 20VDC-36VDC Dissipation
Power: < 20W
* Electrode Materials:
316L SS, Hastelloy B, Hastelloy C, Titanium or
Tantalum
* Sensor Material:
- Measuring tube: stainless steel
- Housing: carbon steel or stainless steel
- Flange type: ANSI #150 or DIN
- Flange Material: carbon steel or stainless steel
* Flow direction indication:
Measuring both forward and reverse flow and recognizing
its direction.
* Analog Output:
Isolated 0~10mA/4-20mA.
Load resistor: 0-1.5KΩ for 0-10mA, 0-750Ω for
4-20mA
* Frequency output:
Forward & reverse flow output with the frequency range
of 1~5000Hz. External voltage <35V, output current <
250mA when the transistor is turned on.
* Pulse Output:
OCT circuit, used for forward or reverse flowrate
Pulse frequency: < 5000cp/s. Pulse width: 10ms,
20ms, up to 400ms, or 50% occupancy. External voltage:
<35V. Maximum output current: <250mA
* Alarm Output:
Two isolated Open Collector Transistor (OCT) outputs for
alarm signals
Can be activated when the pipe is empty, the excitation
circuits are broken or the volume of flow rate exceeds the
value of designed limits
* Integrated 16-bit MCU (microcontroller):
Robust by nature, provides fully digital processing and
high noise resistance.
* Communication:
RS232, RS485/MODBUS, PROFIBUS, HART, BACnet or
LonWorks Communication selectable
* Wireless is available upon request

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6
1.3 Dimensions and Pressure Ratings
Note: For different pressure rating,
the dimension may be different.
Please contact veris-sales@
armstronginternational.com for
more information.
Integral Type
Remote Type
(Sensor only)
Inches Nominal
Pressure
Dimension (in) Weight
L D H1 H2 H3 Compact Remote
15
4.0
200 95 155 285 215 7.5 8.5
20 200 105 160 290 220 8.5 9.5
25 200 115 165 295 225 9 10
32 200 140 180 310 240 10.5 11.5
40 200 150 190 320 250 11 12
50 200 165 200 330 260 13 14
65 2.5 250 185 220 350 280 15 16
80 250 200 240 370 300 17 18
100
1.6
250 235 250 380 310 19 20
125 250 270 280 410 340 23 24
150 300 300 320 450 380 28 29
200
1.0
350 340 380 510 440 36 37
250 450 395 430 560 490 51 52
300 500 445 490 620 550 71 72
350 500 505 550 680 610 82 83
400 500 565 600 730 660 99 100
450 550 615 640 770 700 114 115
500 550 670 700 830 760 134 135
600 600 780 800 930 860 164 165
700
0.6
700 860 895 1025 955 439 440
800 800 975 1015 1145 1075 549 550
900 900 1075 1115 1245 1175 659 660
1000 1000 1175 1230 1360 1290 814 815
1200 1200 1405 1450 1580 1510 879 880
1400 1400 1630 1630 1760 1690 1239 1240
1600 1600 1830 1830 1960 1890 1559 1560
1800 1800 2045 2045 2175 2105 2089 2090
2000 2000 2265 2265 2395 2325 2614 2615

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The Armstrong Electromagnetic Flowmeter is designed to measure the velocity of a conductive liquid within a closed
conduit. It uses Faraday’s law of induction which states that a conductor moving in a magnetic field induces an electrical
voltage. The sensor is mainly composed of a measuring tube with an isolating liner, a pair of electrodes, a pair of coils
and an iron core to produce a working magnetic field. With the flowing fluid as the moving conductor and measuring-
electrodes inside the flow-cell wall, the AMF detects an induced voltage which is proportional to the flow velocity. These
velocity measurements are virtually independent of pressure, density, temperature and viscosity. Because of these
operating principles, accurate measurements can be made of fluids containing solids such as ore slurry, and cellulose
pulp.
In accordance with Faraday’s law of induction, a voltage Ɛ is generated in the magnetic field ßdue to a conductive liquid
moving at velocity vis thus given by:
where ℓ is the distance between electrodes in the magnetic flow meter. This law can be applied to flowmeter systems
because many fluids are conductive to a certain degree. The voltage quantity generated by ions is transmitted as a
4-20mA signal that can measure various flow characteristics. The signal is handled by a high speed CPU and advanced
signal processing technology to ensure a wide measuring range.
Figure 1.3 Principle of Electromagnetic Flowmeter
Ɛ = - ß ℓv,
1.4 Flow Measurement Principle

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1.5 Typical Applications
The AMF can be applied to a wide range of pipe flow measurements. Applicable liquids include pure liquids as well as
mixtures of liquids and solids which have a minimum of electric conductivity. Examples are:
• Water (hot water, chilled water, city water, sea water, waste water, etc.);
• Sewage with particle content;
• Chemicals (glycol, alcohol, acids, etc.);
• Plant effluent;
• Beverage, liquid food;
• Ultra-pure liquids;
• Solvents and other liquids
Applications sorted by industry / process are:
• Water and waste water management;
• Water and waste water treatment plants;
• Power plants, such as nuclear power plants and hydraulic power plants;
• Mining and metallurgy plants;
• Chemical process monitoring and control;
• Pulp and paper process monitoring and control;
• Food and beverage processing;
• Marine maintenance and operation;
• Energy supply and production systems, such as geothermal system, HVAC, BMS, etc
• Flow measurement networking.
1.6 Product Identification
The AMF comes with two variations: Integral Type and Remote Type. The Integral Type has the electronic transmitter and
the flow sensor integrated in one package. On the other hand, the Remote Type has the electronic transmitter and the flow
sensor separated.
Each AMF has a unique product identification number or ESN (electronic serial number) written into the software that can
only be modified with a special tool by the manufacturer. In case of any hardware failure, please provide this number which
is also located on the PCB below the wiring terminals.

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1.7 Specifications
Flow Velocity 0.1m/s to 15m/s (0.3ft/s to 49ft/s), bi-directional
Accuracy
Standard version: ±0.5% of reading
High-accuracy version: ±0.25% of reading
Accuracy not affected by variation of flow density, viscosity, temperature, pressure and conductivity
Display and Buttons Large LCD display with backlight. Display the instantaneous flow, total flow, and alarm
Totalizers
Three built-in totalizers: forward flow totalizer, reverse flow totalizer and net totalizer
Security Keypad can be locked with password
Output Signals
Analog Output Bi-directional, isolated 0 ~ 10mA / 4-20mA. Load resistor: 0-1.5KΩ for 0-10mA, 0-750Ω for 4-20mA
Frequency Output Forward and reverse flow output with the frequency range of 1 – 5000Hz. The external voltage must be lower than 35V and the max output current must be
250mA when the transistor is turned on.
Alarm Output
Alarm output: Two isolated Open Collector Transistor (OCT) outputs for alarm signals. The external voltage must be lower than 35V and the max output
current must be 250mA when the transistor is turned on. Alarm will be activated when the pipe is empty, the excitation circuits are broken or the volume of
flow rate exceeds the value of designated limits.
Pulse Output
The OCT circuit is used for forward or reverse flowrate output. The upper frequency of the output pulse can be up to 5000Hz. The relevant value of pulse
is from 0.1m3/p to 1000m3/p. Pulse width can be set to 10ms, 20ms, up to 400ms, or, 50% occupancy. The external voltage must be lower than 35V and
maximum output current must be 250mA when the transistor is on.
Flow Direction Indication The converter (main unit) is capable of measuring both forward and reverse flow and recognizing its direction. The converter outputs 0V low level for forward
flow, while +12V high level for reverse flow.
Communication RS232, RS485/MODBUS, PROFIBUS or HART Communication selectable.
RS485 interface has opto-isolation rated for 1500V
Protection Class
For Electronic Box IP65 (outdoor). IP67 optional
For Sensor IP65 (outdoor) or IP68 (submersible, only for remote type)
Nominal Pressure
(1/2” – 4”): 2.5MPa (362psig)
(5” – 10”): 1.6MPa (232psig)
(12” – 40”): 1.0MPa (145psig)
(48” – 80”): 0.6MPa (87psig)
Higher pressure rating is available upon request
Lining Material Rubber, PTFE, Polyurethane
Electrode Type General type, scraper type or replaceable type
Electrode Material 316L SS, Hastelloy B, Hastelloy C, Titanium, Tantalum
Sensor Material
Measuring Tube Stainless Steel
Housing Carbon steel as standard offer. Stainless steel available upon request
Flange Carbon steel as standard offer. Stainless steel available upon request
Pipe Connection DIN flange as standard offer ASME ANSI flange
Clamped Type Flange Wafer type
Medium Temperature
Integral type (14°F - 176°F)
Remote type Neoprene & Polyurethane Liner
(14°F - 176°F)
PTFE Liner
(14°F - 302°F)
Ambient Temperature (-14°F - 140°F)
Ambient Humidity 5 ~ 90% RH (relative humidity)
Medium Electrical
Conductivity ≥ 5 us/cm
Measuring Range 1200 : 1, flow rate ≤ (39 ft/s)
Power Supply 85VAC-250VAC; 20VDC-36VDC Dissipation Power: < 20W
Structure Type Integral type, remote type, submersible type
Figure 1.6 AMF Specifications

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10
2.0 Installation and Measurement
Please unpack the shipping box and check the parts and documents against the packing slip. If there is anything missing,
the device is damaged, or something is abnormal, please contact us immediately and do not proceed with the installation.
2.1 Unpacking
WARNING!
The AMF can be used to measure the flow of many kinds of liquids.
Some of the liquids may be hazardous. It is very important that you
comply with local safety codes and regulations in installing and using
electronic devices in your area.
This section provides guidelines for installing the AMF.
2.1 Installation Considerations
The AMF’s electronics are inclosed in a weather-resistant and dust-tight enclosure. Therefore, the main unit can be
installed indoors and outdoors. Usually, it is mounted in a meter shed or on a location where one can easily access for
meter testing and servicing. The main unit should be installed in an area that it is not exposed to continuous saturation
or relative humidity of greater than 90%.
2.2.1 Installing the Unit
The flowcell should be installed by or under the supervision of a professional. When installing the AMF in an
environment involving hazardous liquids please follow proper safety protocol. Please refer to Appendix E for installation
recommendations
2.2.2 Installing the Flowcell