Omega FMG470 Series User manual

PROUDLY
MADE
IN THE
USA
C
e
r
t
i
f
i
e
d
C
o
m
p
a
n
y
ISO
ISO
9001
FMG470 Series
MunicipMunicipal/Industrial Magmetal/Industrial Magmeterer

Page 2
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves
the right to alter specifications without notice.
omega.com [email protected]
Servicing North America:
U.S.A.
Omega Engineering, Inc.
800 Connecticut Ave, Suite 5N01, Norwalk, CT 06854
Headquarters:
Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
Tel: [phone] Fax: [phone]
e-mail: [email protected]
For Other Locations Visit omega.com/worldwide

Page 2 omega.com
General Information
General Information ...................................................................................................................................................Page 3
Features...........................................................................................................................................................................Page 3
Specications ................................................................................................................................................................Page 4
Dimensions ....................................................................................................................................................................Page 5
Accuracy..........................................................................................................................................................................Page 6
Flow Rate ........................................................................................................................................................................Page 6
Installation
Straight Pipe Recommendations ...........................................................................................................................Page 7
Full Pipe Recommendations....................................................................................................................................Page 8
Positioning the Meter ................................................................................................................................................Page 9
Installing Gaskets.........................................................................................................................................................Page 9
Tightening Flange Bolts ............................................................................................................................................Page 10
Equalization and Grounding (Metal and Plastic Pipe)...................................................................................Page 10
Connections
General Cable Information.......................................................................................................................................Page 11
Cable Installation .........................................................................................................................................................Page 11
Conguration
Sourcing Mode Output Application.....................................................................................................................Page 12
Sinking Mode Output Application........................................................................................................................Page 12
Analog (4-20mA Current Loop) Output Application .....................................................................................Page 12
Cable Shield...................................................................................................................................................................Page 13
Pulse Output..................................................................................................................................................................Page 13
Analog (4-20mA) Output..........................................................................................................................................Page 14
Modbus®Output..........................................................................................................................................................Page 14
Operation
Changing Flow Meter Settings - Home Screen and General Navigation..............................................Page 15
Changing Flow Meter Settings - Changing Total Direction/Resetting Totalizers ...............................Page 15
Changing Flow Meter Settings - Entering Menu System.............................................................................Page 15
Changing Flow Meter Settings - Making Selections......................................................................................Page 15
Changing Flow Meter Settings - Standard Menu Options..........................................................................Page 16
Changing Flow Meter Settings - Special Submenu........................................................................................Page 16
To Change a Passcode ...............................................................................................................................................Page 17
Power Indicators ..........................................................................................................................................................Page 18
Battery Powered Units ...............................................................................................................................................Page 18
Troubleshooting & Error Messages
Problem...........................................................................................................................................................................Page 19
Probable Cause.............................................................................................................................................................Page 19
Things to Try ..................................................................................................................................................................Page 19
Error Messages .............................................................................................................................................................Page 19
TABLE OF CONTENTS

Page 3 omega.com
GENERAL INFORMATION
The FMG470 Series is the most economical
flanged electromagnetic flowmeter on the market. With
electrodes designed to discourage fouling, it is available
in 3” to 12” pipe in municipal or industrial water, waste
and reclaimed water, pump stations, and packaged
plant applications. Minimal straight pipe requirements
allow FMG470 Series meters to be used in piping
configurations where there is little space between the
meter and an elbow.
FMG470 Series meters are CE certified, certified to NSF/
ANSI standard 61 and are rated IP68 for applications
where the meter may be operated under water to a depth
of up to 10 feet (3 meters) continuously.
Features
Rate and total units and pulse scaling can be set via
the front panel touch key pad by the user. Bidirectional
ow reading is standard with totals available in forward,
reverse, net ow, batch forward ow, and batch reverse
ow. Built-in data logging is available as an option for secure
ow logging.
A power/output cable allows outputs for use with
a variety of Omega and other displays and controls for
remote reading. Pulse output is standard on all models
in addition to a 4-20mA passive current loop.
FMG470 Series
Power and Output cable
port access
Equalization lug
Data logger port (right
side, not shown)
Powder-coated diecast
aluminum electronics
housing
Rate and total indicator with light sensor
button controls
316SS electrodes (Inside)
Hinged cover
Santoprene/Polypropylene Liner
(Noryl® Liner, 3” only)
Welded steel epoxy-
coated ow tube
(Ductile cast iron ow
tube, 3” only)
User access lid

Page 4 omega.com
Specications*
GENERAL INFORMATION
Modbus®is a registered trademark of Schneider Electric.
* Specicationssubjecttochange.Pleaseconsultourwebsiteforthemostcurrentdata(www.seametrics.com).
1 Ifforwardandreverseowdataneedstobesenttoanotherdevice,eithertheDigitalorModbus®output is required.
2 RateTimeUnitisavailableinDayonly.
3 Forwardandreverseowtotalsarenon-resettable.Batchforwardandbatchreversetotalscanbereset.
Pipe Sizes 2”, 3”, 4”, 6”, 8”, 10”, 12”
Flanges 150 lb. ANSI Pattern
Pressure 150 psi (10.3 bar) line pressure
Temperature Operating 10˚ to 140˚ F (-12˚ to 60˚ C)
Storage -40˚ to 158˚ F (-40˚ to 70˚ C)
Accuracy ±0.75% of reading (±1.0% FMG470), ±0.025% of full-scale flow from low flow cutoff to maximum flow
rate of 10 m/sec
Low Flow Cuto 0.5% of maximum ow rate
Material Body (2”-12”) Welded steel, epoxy-coated
Liner (2”&3”) Polyurethane/Noryl®
Liner (4”-12”) Santoprene ange/Polypropylene liner body
Electronics Housing Powder-coated diecast aluminum
Electrodes 316 stainless steel
Display Type 128x64 dot-matrix LCD
Digits 5 Digit Rate 8 Digit Total
Units
PleaseNote:
Allmetersarefactoryset
for gallons per minute
(GPM)rateandgallons
total. If other units are
required,theycanbesetin
theeld.
Rate Volume Units Rate Time Units Total Volume Units
Gallons
Liters
Barrels(42 gal)
Cubic Feet
Cubic Meters
Million Gallons2
Mega Liters2
Imperial Gallons
Million Imperial
Gallons2
Second
Minute
Hour
Day
Gallons
Gallons x 10
Gallons x 100
Gallons x 1000
Million Gallons
Liters
Kilo Liters
Mega Liters
Barrels (42 gal)
Cubic Meters
Cubic Meters x 1000
Cubic Feet
Cubic Feet x 100
Cubic Feet x 1000
Second Foot Day
Million Cubic Feet
Acre Feet
Acre Inches
Imperial Gallons
Imperial Gallons
x 1000
Million Imperial
Gallons
Fluid Ounces
Bidirectional1Forward Total, Reverse Total, Net Total, Batch Forward Total, Batch Reverse Total3
Power DC Power 9-36 Vdc @ 250 mA max, 30 mA average
Battery Backup
(Not for use as primary power)
DC powered units: One lithium 7.2V ‘D’ size battery pack, replaceable.
AC powered units: One 9V alkaline battery, replaceable.
AC Power 85-264Vac, 50/60Hz, 0.12A
Battery One lithium 7.2V ‘D’ size battery pack, replaceable.
Scaled Pulse
Output
Signal Current sinking pulse, isolated, 36 Vdc at 10 mA max
Pulse Rates User-scalable from 0.1 to 99,999.9 volume units/pulse. Pulse width is one-half of pulse period with
minimum pulse width of 2.5 ms, 200 pulses/sec max. For battery option meters, pulse width varies with
frequency, 150 pulses/sec max.
Options 4-20mA Current Loop Isolated, passive, 24Vdc, 650 Ω maximum current loop
High Speed Digital Isolated, open collector, 24 Vdc
Serial Communications Isolated, asynchronous serial RS485, Modbus®RTU protocol
Cable Power/Output Cable 20ft (6m) standard length polyurethane jacketed cable—for power and outputs (lengths up to 200’
available).
Remote Display Cable 20ft (6m) standard length polyurethane jacketed cable—for connection between meter and remote
display (lengths up to 200’ available).
Conductivity >20 microSiemens/cm
Empty Pipe Detection Hardware/software, conductivity-based
Regulatory (EN 61326), certied to NSF/ANSI standard 61 60°C (140°F)
Environmental NEMA 6P, IP68 (10ft (3m) depth, continuously)
FMG470 Series

Page 5 omega.com
Dimensions
GENERAL INFORMATION
H
L
T
ID
Meter Size
LHT ID Shipping
Weight
inch mm inch mm inch mm inch mm lbs Kg
2” 7.9 200 7.6 193 .62 15.7 1.76* 45* 25 11.3
3” 7.9 200 8.1 206 .62 15.7 2.68* 68* 30 13.6
4” 10.12 257 8.3 211 .62 15.7 3.12 79 33 15
6” 12.09 307 9.1 231 .69 17.5 5.05 128 49 22
8” 14.14 359 10.1 257 .69 17.5 6.44 164 70 32
10” 18.08 459 11.2 284 .69 17.5 8.61 219 130 59
12” 19.68 500 12.2 310 .81 20.6 10.55 268 170 77
Flanges Standard ANSI 150 lb. drilling Cable 1 lb.
Note: ‘L’ dimension is total from liner face to liner face
*Average ID
FMG470 Series

Accuracy (%)
Flow Velocity
0
1
2
3
4
5
330 5 10 15 20 25 30
(m/s)
(ft/s)
0
1
2
3
4
5
510 15 20 25 30 33
0
420 6 8 10
iMAG 4700
iMAG 4700r & iMAG 4700p
Page 6 omega.com
Accuracy
GENERAL INFORMATION
Flow Rate (2” - 12”)
Pipe Size
(Inchesindiameter) 2” 3” 4” 6” 8” 10” 12”
Max Flow Rate
(Gallons/Minute) 321 722 1285 2891 5140 8031 11565
Cut-o (min) Flow
Rate
(Gallons/Minute) 1.61 3.61 6.43 14.46 25.70 40.15 57.82
Max Flow Rate
(Liters/Second) 20.25 46 81 182 324 507 730
Cut-o (min) Flow
Rate
(Liters/Second) 0.13 0.23 0.41 0.91 1.62 2.54 3.65
Max Flow Velocity
(Meters/Second) 10 10 10 10 10 10 10
0
1
2
3
4
5
330 5 10 15 20 25 30
(ft/s)
510 15 20 25 30 33
0
Pressure Drop (PSI)
(m/s)
012345678910
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
3 Inch Pressure Drop
2 Inch Pressure Drop
Flow Velocity
2” & 3” Pressure Drop
Note: No pressure drop in 4”-12” meters
FMG470 Series

Page 7 omega.com
Straight Pipe Recommendations (X = diameter)
1X
2X
2X
2X
1X
5X
5X
5X
Reduced Pipe
Two Elbows In Plane
Two Elbows, Out Of Plane
Expanded Pipe
Swirling Flow:
Propeller Meter
Partially Open
Buttery Valve
1X
1X
1X
1X
Swirling Flow:
INSTALLATION
NOTE: These congurations are to be used as general guidelines and do not cover every possible installation. A
combination of two or more obstructions will require additional straight pipe. If there is any concern about the
length of pipe required for a specic application, please contact your local dealer.

Page 8 omega.com
Full Pipe Recommendations
INSTALLATION
Not Ideal:
If pipe contains air bubbles or sediment
(may aect accuracy)
Best:
Improved accuracy results from
unimpeded electrodes
Electrode
moved from
top by rotating
meter
Intermittent air
bubbles
miss electrode
Electrodes free
from sediment
build-up
Not Ideal:
Allows air pockets to form at meter
Recommended:
Keep pipe full at meter for accuracy
Not Ideal:
Post-valve cavitation can create air pocket
Recommended:
Keeps pipe full at meter for accuracy
Not Ideal:
Air can be trapped
Recommended:
Allows air to bleed o
Not Ideal:
Air can be trapped
Recommended:
Allows air to bleed o
FMG470 Series

Page 9 omega.com
Positioning the Meter
These meters can be installed horizontally, vertically (with
upward flow), or in any radial position. Using a check
valve on the upstream side of the meter, and/or an air
vent (vacuum relief valve) in the same,
unobstructed run of pipe as the meter, is required in
any installation where the meter may be exposed to
suction when the system is not in normal operation.
Suction can cause damage to the liner. Liner damage
caused by suction, without the use of a check valve
and/or air vent, may void the warranty.
Straight Pipe Recommendations. The FMG470
Series requires straight pipe before and after the meter
for best accuracy. However, the ability of electromagnetic
meters to average the flow across the entire pipe allows for
shorter straight pipe recommendations than most
mechanical meters (see page 7).
Full Pipe Recommendations. To prevent false readings,
this meter is designed to indicate ‘EMPTY PIPE’ if one or
more electrodes is exposed. For highest accuracy, install the
meter so that the pipe will be full when there is flow. If air
bubbles may be present in the pipe or sludge accumulation
is an issue, rotate the meter by one flange hole to position
the control housing at a 45˚ angle (see diagrams on page
8).
Fittings. The FMG470 Series has ANSI 150 lb. drilled
flanges and will mate with any other ANSI 150 lb. flanges.
See table on page 10 for flange bolt tightening torque
specifications.
Calibration. The FMG470 Series is factory-
calibrated before shipping. The frequency of
recalibration will depend on the needs of each application
and local regulatory policies.
Chemical Injection. When the FMG470 Series is used in a
chemical injection application, the chemical injection
point must be placed downstream of the magmeter
OR far enough upstream for complete mixing to
occur before the fluid reaches the meter. When unmixed
chemical alternates with water passing through the
meter, the rapid changes in conductivity may cause
sudden spikes and drops in the meter’s reading,
resulting in inaccurate measurement. The magmeter will
re-stabilize, however, with a steady flow of fluid of
uniform conductivity.
CAUTION: These ow sensors are not
recommended where installation may
expose the ow sensor to boiler pressure
and temperature. Maximum recommended
operating temperature is 140˚ F.
CAUTION: In chemical injection applications,
install chemical injection point downstream
of magmeter, or far enough upstream to
allow complete mixing of uids.
INSTALLATION
Installing Gaskets
1. Be sure all mating surfaces are smooth and free of
debris.
2. Install Seametrics provided gaskets, or equivalent,
on each end of meter as shown in diagrams below.
If using grounding rings, install one gasket on each
side of the grounding ring.
3. Failure to install gaskets will void warranty.
Installation without grounding rings
Installation with grounding rings
GASKETS
Gaskets are required at all
junctions.
Gaskets
Gaskets
Grounding
Rings
FMG470 Series

SUGGESTED FLANGE BOLT TORQUE
Liner
Pipe Size ft-lb Nm
2” 18 25
3” 25 34
4” 20 27
6” 42 57
8” 65 88
10” 73 99
12” 97 132
Page 10 omega.com
Equalization and Grounding
Metal Pipe Installations. To equalize the electrical
potential of the fluid, the meter, and the surrounding
pipe, secure the ange plates (factory-installed on the
equalization wire) to both pipe anges at one of the
bolt holes, as shown below. Be sure the lock washer ts
between the pipe ange and the ange plate. For the best
electrical bonding, remove rust and paint to expose clean,
bare metal where the equalization ange plate lock washer
contacts the pipe ange. Connection must be inspected
periodically for corrosion to maintain the necessary low
resistance connection.
Plastic Pipe and Electronically Noisy Installations. When
installed in plastic pipe or in an electrically noisy system (near
a VFD etc.), grounding rings are recommended. As shown in
the diagram below, the equalization wires should be solidly
connected to the grounding ring tabs instead of the flange
bolts as in metal piping installations. Where lightning is a
threat, or in severe electrical environments, an optional
connection to a nearby equipment ground or ground rod may
be advisable.
WARNING: ELECTRICAL SHOCK HAZARD
When installed in a plastic piping system,
or when externally powered, the piping
system must be grounded to meet national
and local electrical safety codes. Failure to
do so can result in electrocution.
Equalization Lug
Meter
Flange Pipe
Flange
Gasket
Pipe Flange
Flange Plate
Lockwasher
Metal PipeMetal Pipe
Meter Flange
Gaskets
Equalization Lug
Ground Clamp
(Exothermicallyweldwhen
corrosionisaconcern)
8’ Ground Rod
Earth
Grounding Ring
Gaskets
Grounding Ring
Gaskets
#6, #8, or #12 AWG Stranded
Copper Ground Wire
Plastic
Pipe
Plastic
Pipe
INSTALLATION
Tightening Flange Bolts
NOTE: Mating pipe anges must be ANSI 150# full face (FF)
and/or raised face (RF).
1. Tighten ange bolts in an alternating pattern.
•Tighten left ange bolt-1 to 20% recommended
torque.
•Tighten right ange bolt-1 to 20% of
recommended torque.
• Repeat steps a and b for each bolt in an
alternating order, such as shown at right,
tightening to 40%, then 60%, then 80%, and
then 100%.
2. Test for leaks.
3. If needed, tighten further in 10% increments
until leaking stops. DO NOT over-tighten.
Over-tightening can cause serious damage to
the flow meter.
4. Recheck after 24 hours, adjusting if needed.
Suggested Tightening Sequence
Caution: Improper tightening sequence
can cause serious damage to the ow
meter.
•Do not tighten one side at a time.
•Do not tighten each bolt completely
at one time.
1
2
34
5
6
7
8
Grounding Ring Part Numbers:
2” = 104124 6” = 100877
3” = 102157 8” = 100878
4” = 100876 10” = 100879
12” = 103288
FMG470 Series

Page 11 omega.com
CONNECTIONS
General Cable Information
The meter has two power/output cables that can be installed. The 4-pin cable contains the wires for DC power and
pulse output. The 8-pin cable contains the wires for DC power and pulse, 4-20 mA or Modbus® output options
when ordered. See diagrams below for details.
Available in either Battery or external DC versions.
WARNING: BACKUP BATTERIES ARE NOT
INTENDED AS A PRIMARY POWER SOURCE
OF A MAINS (DC or AC) CONFIGURED
METER.
Option IDs
O ID POWER SOURCE / OUTPUT(S)
BXX = BATTERY POWER / PULSE SCALED
BXS = BATTERY POWER / PULSE SCALED / MODBUS®
D1X/D2X = DC POWER / PULSE SCALED
D1L/D2L = DC POWER / PULSE SCALED AND 4-20mA
D1S/D2S = DC POWER / PULSE SCALED AND MODBUS®
Red (P1) DC+
Black (P2) DC-
Green (P3) Pulse +
White (P4) Pulse -
Gray (P5) Iso-GND
Blue (P6) B(-)
Orange (P7) A(+)
Brown (P8) N/A
4-20mA Output
Red (P1) DC+
Black (P2) DC-
Green (P3) Pulse +
White (P4) Pulse -
Gray (P5) N/A
Blue (P6) 4-20mA-
Orange (P7) 4-20mA+
Brown (P8) N/A
Modbus® Output
Red (P1) DC+
Black (P2) DC-
Green (P3) Pulse +
White (P4) Pulse -
DC/Battery Power with Pulse Output
1
1
1
2
3
4
5
6
7
8
1
23
4
1
2
3
4
5
6
7
8
Cable Plug Connector
Arrangement
Cable Plug Connector
Arrangement
Cable Plug Connector
Arrangement
FMG470 Series

Page 12 omega.com
Pulse or Digital Output Application - Sourcing Mode (Recommended for Rin < 30kΩ)
Pulse or Digital Output Application - Sinking Mode (Recommended for Rin > 30kΩ)
Analog (4-20mA Current Loop) Output Application
**Minimumresistorvalueis(100xVs)ohms.Higherresistancesmaybeuseddependingonfrequencyandcablelength.
Longercablesandhighfrequenciesrequirelowerresistance.
*** ResistorRLconverts4-20mAcurrenttovoltageforvoltageinputonlydevices.
CONFIGURATION
Meter Connector
Meter Connector
Meter Connector
FMG470 Series

Page 13 omega.com
CONFIGURATION
Cable Shield. In general, the cable shield and its bare drain
wire should be left unconnected at the user equipment end of
the cable to minimize “ground loop” problems.
Pulse Output Conguration. A p ulse o utput i s s tandard
on all models. Since this is an isolated output, the external
equipment must include a DC power source to regenerate the
pulse from the open-collector output (transistor equivalent
of a contact closure). A pull-up or pull-down resistor may
be needed if not included in the user equipment as shown
in the diagrams. Both the power source and resistor may be
supplied internally in some types of control and monitoring
devices. If not, as for most PLC discrete input modules, they
must be added externally at the module input terminals. The
pulse output rate in volume units/pulse can be set by the user
via the SETP tab on the meter’s setup menus.
Because the pulse output is set by the user, care must be
taken to assure the output pulses do not exceed the
maximum frequency of the meter while also ensuring a
reasonable resolution.
K-factor: Remember that SETP is expressed in units totaled
per output pulse (G/P if using gallons) while K-factors are
expressed in pulses per gallon (P/G.) To determine K-factor
from SETP, divide 1 by SETP (if SETP is expressed in gallons.)
Conversely, 1 divided by the K-factor equals SETP
FMG470 Series meters that were initially configured as
battery powered units have a maximum output frequency of
150 Hz. Those that were initially configured as powered
units have a maximum output frequency of 200 Hz.
Because all pulse outputs (SETP) are congured in (rate) units
totaled per pulse, all sizes of meters can be congured with
the same SETP values. For example, if your rate is chosen as
gallons per minute (GPM) the table below applies.
Pulse Units. The units of measure of SETP are independently
selectable and are not tied to rate or total. Upon change of the
SETP unit, the pulse output may take up to 10 seconds, or the
duration of one pulse (whichever is longer) to take eect.
If Pulse Output is Inconsistent. The PDAMP lter may need
to be increased.
Pulse Width Timing. The unit and value of SETP must be
chosen to keep the duration between meter pulse outputs to
less than 500 seconds.
Pulse Timing in Battery Powered Units. The output pulse
width in battery powered units is short and varies with pulse
frequency. (See table)
SETP
Flow Rate at 1
Hz (GPM)
Flow Rate at
200 Hz (GPM)
PoweredMeters
Flow Rate at
150 Hz (GPM)
BatteryPowered
Meters
0.1 6 1200 900
0.2 12 2400 1800
0.3 18 3600 2700
0.4 24 4800 3600
0.5 30 6000 4500
0.6 36 7200 5400
0.7 42 8400 6300
0.8 48 9600 7200
0.9 54 10800 8100
1.0 60 12000 9000
Lowerfrequencyoutputpulses(1pulseforsomeparticular
numberofgallons)canalsobeset.
Any output frequency can be determined by:
Rate (units/minute) ÷ SETP (units/pulse) = pulse/minute
Hz = pulse/minute ÷ 60 seconds / minutes
For reference/comparison only
K-factors and the equivalent SETP values for old style
WMX units are shown below.
WMX 4” 6” 8” 10” 12”
K-Factor 16.36 6.31 3.34 2.15 1.53
SETP 0.06* 0.16 0.30 0.47 0.65
*Notethatyouwouldneedtochoose
aSETPvalueof0.1forthe4”.
Output Pulse Width of Battery Powered Units
Output Pulse Frequency
Output Pulse Width as a Percentage of
the Pulse Period
(Pulse period = 1000 milliseconds/frequency)
Zero to 1 Hz Multiply the pulse
period by 0.01
= Output Pulse
Width (ms)
1 to 20 Hz Multiply the pulse
period by 0.05
= Output Pulse
Width (ms)
20 to 100 Hz Multiply the pulse
period by 0.1
= Output Pulse
Width (ms)
100 to 150 Hz Multiply the pulse
period by 0.15
= Output Pulse
Width (ms)
Example:Iffrequency =20 Hzthen the pulseperiod = 50 millisecondsand
pulsewidth=(.05x50milliseconds)=2.5ms
FMG470 Series

Page 14 omega.com
CONFIGURATION
Analog Output (4-20mA) Conguration.
(Notavailableonbatteryonlyunits.)
Since the meter’s analog output is isolated and passive, loop power must be supplied externally as shown previously.
(In addition, an external resistor RLwill be needed to convert the loop current to voltage for voltage-only input devices.)
The meter’s loop transmitter minimum voltage drop is 6Vdc which, with wiring resistance and loop power supply
voltage, will determine the maximum resistance for RL.
The ow rates corresponding to 4 and 20mA can be set by the user via the SET 4 and SET20 tabs on the meter’s setup menus.
Modbus® Serial Communication Conguration (factory congured).
These connections provide a half-duplex, isolated, RS485 serial communications port using the Modbus®messaging
protocol. The TXD connection is the transmitted data output from the meter and RXD is the received data input to the
meter. See Modbus®Interface Description, LT-103393 (available at omega.com) for supported Modbus® message
protocol and electrical interface specifications.
A 120-ohm termination resistor is built into the Modbus®option board but is shipped in the unused position.
To engage the termination resistor, move the jumper on JP1 from position 3-4 to position 1-2.
Note: As congured by the factory, any alarm state will force 22.8mA on the loop.
This can be changed to 3.2mA - see Technical Bulletin, ‘iMAG4700/AG3000: Changing the 4-20mA Alarm’
FMG470 Series

Page 15 omega.com
OPERATION
Changing Flow Meter Settings
Home Screen and General Navigation
The HOME Screen displays ow volume, direction of the
ow total and ow RATE along with status conditions such
as Empty Pipe. Two buttons below the LCD display are used
to access menu screens for viewing and changing meter
setup parameters.
These two buttons are light sensors which can detect
when a nger is covering them and activate upon
release. Only three button touch actions are needed to
control navigation through the menus, settings changes
and back to the home screen.
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
T UNIT R UNIT SET PDAMP
SET 4SET 20 SET F EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET PDAMP
SET 4SET 20 SET F EXIT
TOTAL:
PRESS TO CHANGE
GALLONS
FORWARD TOTAL
Making Selections
Once in the Menu System, move from tab to
tab by tapping the right button. (See the next
page for details on the various available tabs.)
Select the parameter. In the screen for the
highlighted tab, you will see the current
parameter value for that tab. Tapping the right
button, move to the tab for the parameter you
want to change.
In this example, the rst line indicates that the
current unit for the TOTAL is GALLONS. The
next two lines tell you what to do next.
If you would like to change the TOTAL units,
just perform the hold and tap sequence to
bring up a screen to change the setting.
Select a new setting. Select the new setting
by scrolling through a list of selections as in
the screen illustration below by tapping the
left button to nd a dierent TOTAL unit.
Accept changes. To accept any changes
you have made, perform the hold and tap
sequence.
When nished making changes. When you
are nished making changes, move to the EXIT
tab using the right button.
To return to the HOME screen, perform the
hold and tap sequence.
TAP
TAP
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
T UNIT R UNIT SET PDAMP
SET 4SET 20 SET F EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET PDAMP
SET 4SET 20 SET F EXIT
TOTAL:
PRESS TO CHANGE
GALLONS
FORWARD TOTAL
+
HOLD TAP
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
T UNIT R UNIT SET PDAMP
SET 4SET 20 SET F EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET PDAMP
SET 4SET 20 SET F EXIT
TOTAL:
PRESS TO CHANGE
GALLONS
FORWARD TOTAL
TAP
+
HOLD TAP
TAP
+
HOLD TAP
HORIZONTAL SCROLLING:
Tap right button to scroll horizontally through
menu tabs or move horizontally within a tab
dialog when applicable.
SELECT:
Tap left button to change a highlighted item
within a tab dialog.
ENTER/EXIT:
Hold left button while tapping right button
once to enter or exit a tab dialog or to navigate
between the HOME and other menu screens
(continue to hold the left button until after the
right button is released.).
Changing Total Direction/Resetting Batch
Totalizers
On the Main screen, hold and tap 7 times
to scroll through the total direction options.
Release to select a total direction.
Once BATCH FORWARD or BATCH REVERSE is
selcted, tap four times to reset batch totalizer.
Entering Menu System
To enter the Menu System, perform the hold
and tap sequence. The Passcode entry screen
will display. The default passcode is 000000. If
a dierent passcode has previously been set,
use the and to enter that passcode.
In either case, hold and tap again to move
into the menu system. (Ifyouenterthewrong
passcode, hold and tap again to return to the
previousscreen.Seepage21forinformationon
howtochangeapasscode.)
TAP
TAP
+
HOLD TAP
000000
ENTER PASSCODE
PRESS AND TO CHANGE
+
HOLD TAP
+
HOLD
TAP
FMG470 Series

Page 16 omega.com
OPERATION
Standard Menu Options
The EXIT tab in the MAIN MENU has a second function.
If, instead of using the hold and tap sequence to return
to the HOME screen, you tap seven times, you will
be redirected to a SUBMENU screen from which you can
access several more options.
Navigation in this SUBMENU is the same as for the MAIN
MENU. Whenever you wish, go to the EXIT tab in the
SUBMENU and perform the hold and tap sequence to
return to the MAIN MENU.
Sub-Menu
INFO COMM MBID FL DIR
SAMP HPOLL FOUT EXIT
PRESS + TO VIEW INFO
ABOUT METER
INFO: Meter model number, serial number, and
rmware version.
COMM: Modbus®baud rate and parity.
MBID: Modbus®address
SAMP: Sample rate (Batterypoweredversiononly.)
EXIT: Return to MAIN MENU or enter next submenu.
INFO COMM MBID FL DIR
SAMP HPOLL FOUT EXITSAMP
PRESS + TO VIEW INFO
ABOUT METER
Sub-Menu-BatteryOnlyVersion
T UNIT
View or change TOTAL
volume units
R UNIT
View or change ow
RATE units
SET P
View or change pulse
output scaling
DAMP
View or change # of
samples for rolling
average.
T UNIT R UNIT SET P DAMP
SET 4 SET 20 SET F EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET P DAMP
SET 4 SET 20 SET F EXIT
FLOW RATE = GALLONS/MIN
PRESS + TO SET RATE
UNITS FOR DISPLAY
T UNIT R UNIT SET P DAMP
SET 4 SET 20 SET F EXIT
00001.0 GALLONS
PRESS + TO SET
GALLONS TOTALIZED PER
PULSE SENT OUT PULSE1
T UNIT R UNIT SET P DAMP
SET 4 SET 20 SET F EXIT
DAMPING = 1
PRESS + TO SET
DAMPING VALUE
SET 4
View or change ow
rate corresponding
to 4mA. (Externally
poweredunitsonly)
SET 20
View or change ow
rate corresponding
to 20mA. (Externally
poweredunitsonly)
EXIT
Return to HOME
SCREEN or enter
SUBMENU
T UNIT R UNIT SET P DAMP
SET 4 SET 20 SET F EXIT
00040.0 GALLONS/MIN
PRESS + TO SET FLOW
RATE AT WHICH 4mA
(MIN) OUTPUT IS DESIRED
T UNIT R UNIT SET P DAMP
SET 4 SET 20 SET F EXIT
00200.0 GALLONS/MIN
PRESS + TO SET FLOW
RATE AT WHICH 20mA
(MAX) OUTPUT IS DESIRED
T UNIT R UNIT SET P DAMP
SET 4 SET 20 SET F EXIT
PRESS + EXIT MENU
AND RETURN TO FLOW
DISPLAY
Note: Available options will depend on specic meter conguration. Not all options are available on all meters.
Options not ordered with your meter will not appear on the meter menu.
Special SUBMENU for Further Options
FMG470 Series

Page 17 omega.com
OPERATION
The AG3000 has a passcode system for restricting access
to the menus. The AG3000 comes from the factory with the
passcode set to 000000. When a user attempts to enter the
menu system (see details on page 16), the passcode entry
screen will be displayed.
The default passcode is 000000. If a dierent passcode has
previously been set, then the user must enter that passcode
at this time. After entering the passcode, or leaving it at
000000 if using the default passcode, the user does the tap
and hold sequence to move into the menu system.
To change the passcode, you must use the THIRD MENU
screen. Access the THIRD MENU screen as follows:
• Enter the main menu system, as described above.
• On the main menu, tab over to the EXIT tab and
tap the up arrow ve times. A SUBMENU screen will
display.
• On the SUBMENU screen tab over to the EXIT tab
and tap ve times. The THIRD MENU screen will
display.
000000
ENTER PASSCODE
PRESS AND TO CHANGE
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
T UNIT R UNIT SET PDAMP
SET 4
SET 4
SET 20
SET 20
SET F
SET F
EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET PDAMP
SET 4
SET 4
SET 20
SET 20
SET F
SET F
EXIT
TOTAL:
PRESS TO CHANGE
GALLONS
0.0000000
SET ID
TOTAL
ACRE
FEET
RATE
GPM
OK
FORWARD TOTALFORWARD TOTAL
SETCD
PRESS + TO SET
SAMP FOUT EXIT
000000
PASSCODE
SETD PDAMP TEST
To Change a Passcode and Decimal Places
•To set the PASSCODE, hold and tap on SETCD and
then use the and to enter the new code.
• Hold and tap again to return to the THIRD MENU
screen.
• Tab to EXIT, and then hold and tap to return to the
SUBMENU.
To change the number of decimal places in the total
• To set the decimal point, hold and tap on SETD and
then use the to move the decimal point.
• Hold and tap again to return to the THIRD MENU
screen.
• Tab to EXIT, and then hold and tap to return to the
SUBMENU.
PDAMP
PDAMP is used to view or change the number of samples
for rolling average of pulse output.
TEST
TEST allows the user to initiate a fully functional, articial
ow rate for the purpose of testing other connected
equipment. When TEST is applied, all features of the
meter will function at the stated ow rate (in gallons per
second).
For TEST to function, the meter must be lled (not EMPTY
PIPE).
To enter a value into the TEST feature, navigate to the
TEST tab and enter a ow rate value in the VAL screen (in
gallons per second only,) then to the VAL box and
to the ON screen. This will initiate the TEST feature. The
next would bring you to the OFF screen, but you can
‘hold and tap’ the arrows to return you to the sub menu
while the feature operates.
After use, the TEST feature must be turned OFF. If the
TEST feature is not turned OFF, the stated static ow rate
(in gallons per second) will be shown any time the meter
is full or in a owing condition. Flow values recorded
by the meter while the TEST feature is operating are
permanently recorded in the displayed TOTAL. It may
be useful to note that these values are only written to
permanent memory every 15 minutes and cycling all
power within this 15 minute time frame will return the
meter to its previous total.
INFO COMM MBID FL DIR
SAMP HPOLL FOUT EXIT
PRESS + TO VIEW INFO
ABOUT METER
FMG470 Series

Page 18 omega.com
OPERATION
To ‘wake up’ a battery powered meter, you may need to
hold the up arrow for 5 seconds and release. If the meter
does not wake up on the rst attempt, repeat the 5 second
hold.
The meter can come configured with one 7.2V ‘D’ size
replaceable battery pack. In this configuration, the
only option/output is the scaled pulse output which
comes standard. The scaled output for the battery
powered option has a maximum pulse rate of 150 pulses/
second. Be sure to set your P value such that the meter will
function properly over the ow range in your application.
The sample rate of the meter is user selectable through
the SAMP tab in the meter’s sub-menu. Sample periods
of 1/5, 1/3, 1, 3, 5, 15, 30, and 60 seconds can be selected.
(A sample period of 5 seconds—5 year battery life—is the
default.)
Larger sample periods will yield longer battery life but
slower response time. Care must be taken to select a
sample period that is suitable for your application. See the
table below for the expected battery life as a function of
sample period.
DAMP Settings for Battery Units
If SAMP (sample period) is set to less than one second, the
DAMP value represents the number of seconds (plus one)
used in the rolling average for the display. For example, if
DAMP is set to four, then when the meter begins to show
a ow rate, the rate displayed is the average of all the
readings taken in seconds one through ve (4 plus 1).
If SAMP (sample period) is set to one second or longer,
the DAMP value represents the number of sample periods
(plus one) used in the rolling average for the display. For
example, if SAMP is set at three seconds and DAMP is set to
four, then when the meter begins to show a ow rate, the
rate displayed is the average of samples one through ve
(4 plus 1). Note that depending on the settings selected,
Battery Life/Sample Period
For battery (BX) powered meters only.
Sensor sample period(s)
(Seconds)
Expected battery life*
1/5 (0.2) 7 months
1/3 (0.33) 1 year
1 2.25 years
3 4 years
5 5 years
15 6 years
30 6.25 years
60 6.5 years
*Basedon75%batterycapacityatroomtemperaturewith
no option cards installed.
NOTE:Ifalargepercentageofthemeter’slifewillbespent
below0.5meters/secondandabovecuto,batterylifewill
be reduced.
Battery Powered Units
A power indicator is displayed in the lower left of the main
display window.
Any meter powered from an external power source will
display a power plug icon when running on external power.
If the connection to external power is lost, the meter will
switch to the backup battery and the power icon will switch
to a battery symbol.
OK on the battery indicator means battery voltage is above
6.4 volts.
LO on the battery indicator means the battery is low and
should be replaced soon.
OK
LO
P
OK
LO
Beingpoweredbyexternal
DCorAC
Beingpoweredbybattery-
voltageissucient
Beingpoweredbybattery-
voltageislow
1.2345678
100
TOTAL
CU FT
X1000
RATE
GPM
T UNIT R UNIT SET PDAMP
SET 4
SET 4
SET 20
SET 20
SET F
SET F
EXIT
TOTAL = GALLONS
PRESS + TO SET TOTAL
UNITS FOR DISPLAY
T UNIT R UNIT SET PDAMP
SET 4
SET 4
SET 20
SET 20
SET F
SET F
EXIT
TOTAL:
PRESS TO CHANGE
GALLONS
0.0000000
SET ID
TOTAL
ACRE
FEET
RATE
GPM
OK
FORWARD TOTA
LFORWARD TOTAL
P
Power Indicators
If display reads, ‘BATT END’
replace battery
immediately.
BATTERY LIFE WITH MODBUS® OPTION!
IN THIS CONFIGURATION THE METER COMES STANDARD
WITH PULSE OUTPUT. WHEN ORDERED WITH THE
MODBUS® OUTPUT OPTION, BATTERY LIFE WILL BE
REDUCED TO 1 YEAR, OR GREATER, BASED ON USAGE.
REDUCE POLLING FREQUENCY AND MINIMIZE DATA
COLLECTED IN ORDER TO MAXIMIZE BATTERY LIFE.
it may take up to a minute for the displayed rate to take
full advantage of the DAMP lter. When starting with an
EMPTY PIPE it may take at least 30 seconds to register
any ow.

Page 19 omega.com
TROUBLESHOOTING & ERROR MESSAGES
Troubleshooting
Problem Probable Causes Things to try…
Blank Display Faulty wiring from power source to
meter
Check for incorrect wiring. Measure voltage with
DMM where red and black wires connect to
terminal block TB1 on back side of display. Verify
correct polarity and conrm that voltage is steady
and between 9Vdc and 32Vdc
Backup battery has not been plugged in Plug in the battery
Dead backup battery Replace battery
Flow rate reading uctuates
excessively when ow is
unchanging
Excessively turbulent or unsteady ow
due to partially closed valves or other
ow obstructions
Eliminate or minimize causes of ow disturbances
or increase meter damping
Pipe not full Provide back pressure or other means to ensure
pipe is lled
Pulsing ow due to combining multiple
upstream ow sources
Move connection point further upstream
Insucient mixing of upstream
chemicals
Move chemical injection downstream from meter
Low uid conductivity < 20 µS/cm Replace with dierent type of meter
Noisy electrical environment Improve grounding at meter and nearby potentially
noisy electrical equipment. Increase distance
between meter and electrical noise sources.
Defective or noisy AC switching power
supply
Replace power supply
Flow Rate appears correct but
pulse/ frequency output is low,
erratic or absent
Wiring incorrect Compare wiring with appropriate wiring
recommendations
External device input impedance too low Use sourcing rather than sinking interface
connection
Cable too long Reduce interface pull-up resistance
Flow Rate appears correct
but pulse/frequency output is
erratic and/or too high
Electrical noise sources interfering with
pulse frequency signal
Isolate, remove or reduce noise sources. Move
meter control cable away from noise sources.
Increase pulse damp setting (PDAMP)
Wrong type of cable Use only twisted pair cable and ensure both signal
wires are on same twisted pair
Grounding problem Improve or try dierent grounding method
Troubleshooting
Error Messages
Under certain conditions an error message may be displayed.
Message Description Notes
INIT Initialization is occurring during power up.
EMPTY PIPE Fluid is not detected between the sensing electrodes. Loop output = 22.8mA
LO in battery icon Battery is getting low, replace soon. Meter still functions. Above 6.4V, OK appears in icon
BATT END Battery is very low (approx. 6.1V). Totalizer stops updating. Loop output = 4mA
LOW VOLT Incoming external power is very low and backup battery is dead
or not connected
Loop output = 4mA
COIL FAIL Coil current too high or too low (short or open). Loop output = 22.8mA
COMM FAIL Communication between transmitter and sensor board fails. Loop output = 22.8mA
OVER RANGE Rate exceeds number of digits that can be displayed. Adjust units. Loop output = 4mA
FMG470 Series