Omega Products FMG-1000 Installation Manual

User's Guide

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FMG-1000 SERIES

Municipal/Industrial Magmeter

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It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.

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Servicing North America:

U.S.A.: One Omega Drive, P.O. Box 4047

ISO 9001 Certified

Stamford, CT 06907-0047
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

U.S.A. and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

Customer Service: 1-800-622-2378 / 1-800-622-BEST
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FAX: [phone] [e-mail]

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Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Frystatska 184, 733 01 Karviná, Czech Republic

TEL: [phone] FAX: [phone]
Toll Free: 0800-1-66342 e-mail: [e-mail]

France: 11, rue Jacques Cartier, 78280 Guyancourt, France

TEL: [phone] FAX: [phone]
Toll Free in France: 0800 466 342
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Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

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United Kingdom: One Omega Drive, River Bend Technology Centre

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Northbank, Irlam, Manchester
M44 5BD United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

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.
WARNING: These products are not designed for use in, and should not be used for, human applications.

TABLE OF CONTENTS

General Information

General Information, Features .........................................................................................................Page 1

Specications

Specications, Flow Range ............................................................................................................Page 2

Installation and Grounding

Positioning the Meter,

Calibration, Chemical Injection, Metal Pipe Installations, Plastic Pipe Installations .............................Page 3

Straight Pipe Recommendations ............................................................................................ Page 4

Full Pipe Recommendations .......................................................................................................Page 5

Inputs/Outputs and Operation

Power, Pulse Output, High Frequency, K-Factor, Display Reading .....................................................Page 6

Connections Diagrams

FMG-1000-MAW, FMG-1000-DL.....................................................................................................Page 7

Straight Pipe Recommendations, Full Pipe Recommendations, Fittings,

Troubleshooting

Problem, Probable Cause, Things to Try ........................................................................................Page 8

TABLES, DIAGRAMS & CHARTS

Features ......................................................................................................................... Page 1

Specifications .................................................................................................................. Page 2

Flow Range .................................................................................................................. Page 2

Metal Pipe Installation, Plastic Pipe Installation ............................................................. Page 3

Straight Pipe Recommendations ........................................................................................ Page 4

Full Pipe Recommendations ........................................................................................... Page 5

High Frequency Output ................................................................................................. Page 6

Display Readings ............................................................................................................. Page 6

Connections Diagrams ...................................................................................................................... Page 7

Troubleshooting ......................................................................................................................... Page 8

GENERAL INFORMATION

The FMG-1000 Series are anged electromagnetic
owmeters for use in 4” to 10” pipe in municipal or industrial
water and wastewater applications where propeller meters
have typically been used in the past. Because the FMG­1000 has no moving parts and has electrodes designed
to discourage fouling, this magmeter performs well and
requires much less frequent maintenance in applications
where debris or sand would impede propeller meters. There
is no rotor to stop turning or bearings to wear out. Minimal
straight pipe requirements allow FMG-1000 Series meters to
be used in piping congurations where there is little space
between the meter and an elbow.

In chemical injection applications, the meter should be placed
upstream of the injection line or far enough downstream for
thorough mixing to occur before the meter.

Rate and total indication are standard on both models. Flow
measurement units are customer-selected and factory-set
and can only be changed in the eld by an authorized Omega
dealer.

The FMG-1000 is externally powered with 7-26 Vdc at 30 mA
max (see WARNING on Wiring Diagrams).

The 20-foot power cable also provides pulse output for use
with a variety of displays and controls for remote reading,
data logging, pulse-to-analog conversion, and telemetry
applications. Pulse rate is customer-selected and factory-set
and can only be changed in the eld by an authorized Omega
dealer. Default is high frequency for use with 4-20 mA signal
conversion devices.

FEATURES

Rate and total indicator
Powder-coated diecast-aluminum electronics housing

Power/Output cable port

Welded steel epoxy-coated ow tube

316SS electrodes

Dual durometer rubber liner

Flanges, ANSI 150 lb. drilling

Equalization lug

4” 6” 8” 10”
Gal/Min Liter/Sec Gal/Min Liter/Sec Gal/Min Liter/Sec Gal/Min Liter/Sec

12 .75 32 2 60 3.8 95 6
500 31.5 1,200 75.7 2,200 138.8 3,500 220.8

Page 1

SPECIFICATIONS

SPECIFICATIONS*

Pipe Sizes

Flanges

Pressure

Temperature Operating
Non-Operating

Accuracy

Materials Body

Liner

Electronics Housing

Electrodes

Display
Digits

Units*

Power

Pulse Output Signal

Pulse Rates

High Frequency
(pulse/gal)

Conductivity

Empty Pipe Detection

Environmental

*Specications subject to change.

4”, 6”, 8”, 10”

ANSI 150 lb. drilling

150 psi (10.3 bar) working pressure

10˚ to 130˚ F (-12˚ to 54˚ C)

-40˚ to 158˚ F (-40˚ to 70˚ C)

+/-1% of reading from 10% to 100% of reading

+/-2% of reading from cutoff to 10% of reading

Welded steel, epoxy-coated

Dual durometer rubber

Diecast aluminum, powder-coated

316 stainless steel

Rate Total

5 8
Gallon/Minute, Liter/Minute, Liter/Second, Gallon, Gallon x 1000, Liter, Liter x 1000, Mega Liter,

Cubic Feet/Minute, Cubic Meter/Hour, Cubic Meter, Cubic Meter x 1000, Cubic Feet,
Million Gallon/Day, Mega Liter/Day Cubic Feet x 1000

7-26 Vdc at 30 mA max
NOTE: Using an unregulated power supply >18 Vdc may damage the meter due to AC line input voltage uctuation

Current sinking pulse, opto-isolated, 30 Vdc at 10 mA max
Pulse output available only with addition of post-factory output cable

High Frequency (default); 10 units/pulse; 100 units/pulse; 1000 units/pulse

4” 6” 8” 10”

16.362 6.307 3.344 2.150

>20 microSiemens

Hardware/software, conductivity-based

NEMA 4X

FLOW RANGE

Minimum
Maximum

Page 2

INSTALLATION and GROUNDING

INSTALLATION

Caution: These ow sensors are not recommended

where installation fault may expose the ow sen­sor to boiler pressure and temperature. Maximum
recommended temperature is 130˚ F.

Positioning the Meter. These meters can be installed
horizontally, vertically, and in any radial position.

Straight Pipe Recommendations. As with most ow meters,
the FMG1000 requires some straight pipe before and/or
after the meter for best accuracy. However, the ability of
electromagnetic meters to average the ow across the entire
pipe allows for shorter straight pipe recommendations than
most mechanical meters (see page 4).

Full Pipe Recommendations. All magmeters require a
method for determining that the pipe is empty, to prevent false
reading. This meter is designed to go to zero reading if one
or more electrodes is exposed. For highest accuracy, install
the meter so that the pipe will be full when there is ow. If air
bubbles may be present in the pipe or sludge accumulation
is an issue, rotate the meter by one ange hole to position
the control housing at a 45˚ angle. See Full Pipe diagrams
on page 5.

EQUALIZATION AND GROUNDING

Metal Pipe Installations. To equalize the electrical potential

of the uid with the meter, and the surrounding pipe, secure
the ange plates (factory-installed on the equalization lug) to
both pipe anges at one of the bolt holes, as shown below.
Be sure the lockwasher ts between the pipe ange and the
ange plate.

Meter Flange

Pipe Flange

Lockwasher

Flange Plate

Equalization Lug

Metal

Pipe

Meter

Flange

Bolt

Pipe
Flange

Metal

Pipe

Equalization Diagram

Run wire from equalization lug to both pipe anges;

secure ange plates under bolt heads as shown.

Fittings. The anges have standard ANSI 150 lb. drilling and
mate with any other ANSI 150 lb. ange.

Calibration. The FMG-1000 is factory-calibrated and will not
require any form of eld calibration.

Chemical Injection. When any magmeter, by any manufac­turer, 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 uid 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 restabilize, however, with a steady ow of uid
of uniform conductivity.

Caution: In chemical injection ap­plications, install chemical injection
point downstream of magmeter, or far
enough upstream to allow complete

mixing of uids before the meter.

WARNING: ELECTRICAL SHOCK HAZARD When
the meter is externally AC powered, the piping sys­tem must be grounded to meet national and local
electrical safety codes. Failure to do so can result
in electrocution.

Plastic Pipe Installations. When the FMG-1000 is installed
in a plastic piping system, it is not necessary to use the
equalization straps, but very important to ground the meter
to avoid electrical shock hazard and electrostatic interfer­ence with meter function.

Meter Equalization Lug

Plastic Pipe Plastic Pipe

Exothermically weld when

corrosion is a concern

#6 AWG Stranded

Copper Ground Wire

Ground Clamp

Earth

8’ Ground Rod

Page 3

STRAIGHT PIPE RECOMMENDATIONS

(X = diameter)

Reduced Pipe

Two Elbows In Plane

Two Elbows, Out Of Plane

1X

2X

Meter

1X

2X

Meter

1X

2X

Expanded Pipe

Swirling Flow

Propeller Meter

5X

5X

Meter

Meter

5X

1X

1X

Meter

1X

Swirling Flow

Partially Open

Buttery Valve

Meter

Page 4

FULL PIPE RECOMMENDATIONS

Recommended:

Keep pipe full at meter for accuracy

Meter

Meter

Not Ideal:

Allows air pockets to form at meter

Meter

Recommended:

Keeps pipe full at meter for accuracy

Meter

Recommended:

Allows air to bleed off

Intermittent air

Electrode

moved from

top by rotating

meter

Meter

miss electrode

Electrodes free

from sediment

bubbles

build-up

Meter

Not Ideal:

Post-valve cavitation can create air pocket

Meter

Not Ideal:

Air can be trapped

Intermittent air

bubbles

pass over

electrode

Possible

sediment

build-up

Meter

Page 5

Recommended:

Improved accuracy results from

unimpeded electrodes

Not Ideal:

Air bubbles and sediment on the

electrodes can affect accuracy

INPUTS/OUTPUTS and OPERATION

INPUTS/OUTPUTS

Power. The FMG-1000 operates on 7-26 Vdc at 30 mA max

external power (see WARNING in wiring diagrams). The display
reads “P” when external power is in use (see illustration below).

Pulse Output. The cable also provides pulse output that
can be used for remote reading, 4-20 mA signal conversion,
datalogging, and telemetry applications. See page 7 for
connection diagrams to Omega controls and displays.

Pulse rates are selected by the customer at time of order,
factory-set, and can only be changed in the field by an
authorized Omega dealer. Three pulse rates are possible:
One pulse per ten gallons (or liters), one pulse per thousand
gallons (or liters), or High Frequency (required for use with
4-20 mA converters; see below):

High Frequency Output/K-Factor

Meter Size Pulses per Gallon Pulses per Liter

4” 16.362 4.323
6” 6.307 1.666
8” 3.344 0.883
10” 2.150 0.568

OPERATION

Caution: There are no user-adjustable
connections or settings inside the display
housing. Use caution when opening the
housing for a battery change, to avoid

damage to internal components.

Display Reading. The FMG-1000 display has two lines, the
bottom line for ow rate and the top line for accumulated total.
Measurement units are pre-ordered and factory-set and can
be changed in the eld only by an authorized individual.

Refer to the diagrams below to read your display.

External Power Indicator

No Power

Meter Installed Backwards

Empty Pipe

Page 6

CONNECTIONS DIAGRAMS

The FMG-1000 requires a power source of 7 to 26 Vdc at
30 mA max (see WARNING). The power cable also serves as
a pulse output if needed for remote reading, data logging,
signal conversion, or telemetry.

FMG-1000-MAW

Blue

Do

Not

{

Orange

Use

4-20 mA

Power

5

6

4

3

2

1

0

Frequency

5

6

4

4

7

8

9

7

3

3

8

2

2

9

1

0

S

Sensor

Not

Used

5

5

6

6

4

7

7

3

8

8

2

9

9

1

1

0

0

Pulse-to-Analog Converter

Power Supply
at 30 mA max

(see WARNING)

White (-)
Green (+)

Black
Red

(-) (+)

7-26 Vdc

FMG1000 Cable Color Codes

Orange and Blue: Serial Output (Do Not Use)
Green (+) and White (-): Isolated solid-state contact closure pulse

output, 30 Vdc max, 10 mA max

Red (+) and Black (-): External Power, 7-26 Vdc at 30 mA max
Drain: Connect to earth ground (see WARNING)

Cable

Shielded

Drain Wire

Direct Burial Cable
22 AWG Stranded

WARNING: Using an unregulated power
supply >18 Vdc may damage the meter
due to AC line input voltage uctuation.

FMG-1000

FMG-1000-DL

Battery

Data Logger

Blue

Do

Not

{

Orange

Use

-

S

+

Not

Used

Power Supply
at 30 mA max

(see WARNING)

(-) (+)

7-26 Vdc

Green (+)

Black
Red

Drain Wire

White (-)

Shielded
Direct Burial Cable
22 AWG Stranded

Cable

FMG-1000

WARNING: Using an unregulated power
supply >18 Vdc may damage the meter
due to AC line input voltage uctuation.

Page 7

TROUBLESHOOTING

Problem

Blank Display

Flow rate steadily reads
zero when there is ow

Flow rate intermittently
drops when there is ow

Probable Cause Try...

No power

Flow is below cutoff (very low)

Pipe not full

Meter is installed backwards
(display reads [ - ] )

Power connections reversed

Fluid conductivity <20mSiemens/cm

Pipe not full

Check power connections

Reading will resume when ow increases

Reposition meter for full pipe (see page 4)

Note ow direction arrow, reverse meter

Change power connections

Select another ow meter

Reposition meter for full pipe (see page 4)

Jumpy reading

Meter reads, but no
pulse output

Output pulses missing

Missing or incorrect ground wire

Rapidly changing conductivity
(in chemical injection applications)

External device needs pull-up resistor

Reversed leads (polarity sensitive)

Meter not reading

Check for proper ground

Install chemical injection line downstream
of meter (or far enough upstream to allow
complete mixing of uids before meter)

Add pull-up resistor

Change output connections

Check display

Page 8

WARRANTY/DISCLAIMER

FOR NON-WARRANTY REPAIRS,

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months f rom date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be re t u rned to the factory for evaluation. O M E G A’s Customer Serv i c e
D e p a rtm ent will issue an Authorized Return (AR) number immediately upon phone or written re q u e s t .
Upon examination by OMEGA, if the unit is found to be defective, it will be re p a i red or replaced at no
c h a rge. O M E G A’s WARRANTY does not apply to defects resulting from any action of the purc h a s e r ,
including but not limited to mishandling, improper interfacing, operation outside of desi
i m p roper re p a i r, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corro s i o n ;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s c o n t r ol. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or e
damages that result from the use of its products in accordance with information provided by
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the
company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
R E P R E S E N T ATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY W

AND FITNESS FOR A PA R TICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
L I A B I L I T Y: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this ord e r , whether based on contract, warr a n t y, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
compone nt upo n wh ic h li abili ty is based. In no even t shall OMEGA be li able for
co

nsequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
a c t i v i t y , medical application, used on humans, or misused in any way, OMEGA assumes no re s p o n s i b i l i t y
as set forth in our basic WA R R A N T Y/ D ISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA h a rmless from any liability or damage whatsoever arising out of the use of the
P roduct(s) in such a manner.

rrors nor assumes liability for any

ARRANTY OF MERCHANTA B I L I T Y

gn limits,

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR

) NUMB ER FROM OM EGA’S C U STOM E R SERVICE DE PA R TMEN T ( IN ORDE R T O AV O I D
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.

WARRANTY RETURNS, please have the

FOR
following information available BEFORE
contacting OMEGA:

1 . P u r chase Order number under which the pro d u c t

was PURCHASED,

2. Model and serial number of the product under
warranty, and

3. Repair instructions and/or specific problems
relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2005 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.

for current repair charges. Have the following
information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the COST
of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems
relative to the product.

consult OMEGA

Notes

W h e r e Do I Find Eve rything I Need for

P r ocess Measurement and Control?

OME GA…Of Cours e !

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