Omega Products FMG81 Installation Manual

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User’s Guide

FMG80 SERIES

Low-Flow Magmeter

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

®

Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

®

TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico: En Espan˜ol: [phone]-7803 e-mail: [e-mail]

FAX: [phone] [e-mail]

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
e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

TEL: [phone] FAX: [phone]
Toll Free in Germany: 0800 639 7678
e-mail: [e-mail]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified

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

OMEGAnet®Online Service Internet e-mail

omega.com i n f o @ o m e g a . c o m

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.

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.

GENERAL INFORMATION, FEATURES and SPECIFICATIONS

The FMG80 magmeter is designed for low-ow chemical in­jection or difcult-to-meter applications with pulsating meter­ing pumps in 3/4” to 1/4” pipe/tube. The housing is made of
sturdy splashproof HDPE plastic.

With no moving parts, the FMG80 can handle uids contain­ing particulate matter without clogging or jamming, keeping
maintenance at a minimum. With no metallic parts (100%
PVDF body and PVDF carbon ber-lled electrodes), the me­ter is corrosion-resistant and compatible with a wide range of
chemicals. Accuracy is maintained with conductive uids (>20
microSiemens) of varying viscosities and densities.

FEATURES

8-pin circular bulkhead connector

Internals made of chemical and corrosion-resistant PVDF

Sturdy HDPE housing

Mounting bracket

The FMG80 meter is compact enough to t most pump/injec­tion systems. With zero straight pipe required after an elbow, it
can be easily mounted in tight spaces. The mounting bracket
adds stability.

The FMG80 meter has optocoupled current sinking or current
sourcing pulse output that can be connected to many Omega
rate/total displays or batch processors, as well as a 4-20 mA
loop for powering analog devices. Outputs and power are pro­vided through a cable with 8-pin female circular connector.

Threaded NPT adapters

in PVDF

SPECIFICATIONS*

Pipe Size

Fittings

Materials Body

Electrodes

Ground

Housing

Fittings (FlareTek)

Adapters (for NPT)

O-Rings (for NPT)

Temperature Ambient
Fluid

Pressure

Flow Range FMG83, FMG84
FMG81, FMG82

Accuracy FMG83, FMG84
FMG81, FMG82

Output Signal

FMG83, FMG84
FMG81, FMG82

Power

Conductivity

Empty Pipe Detection

Environmental

*Specifications subject to change • Please consult our website for current data (www.omega.com).

3/4”, 1/2”, 3/8”, 1/4”

NPT threaded adapters

PVDF

PVDF carbon ber-lled

PVDF carbon ber-lled

HDPE with glass ber

PVDF

PVDF

EPDM or optional FKM

0˚ to 130˚ F (-18˚ to 54˚ C)
32˚ to 200˚ F (0˚ to 93˚ C)

150 psi

20 GPM Max. (0.2 GPM cut off)
3 GPM Max. (0.03 GPM cut off)

+/- 1%, +/- 0.005 GPM of reading across rated range
+/- 1%, +/- 0.002 GPM of reading across rated range

Optocoupled current sinking or current sourcing pulse output: 30 Vdc, 5 mA max
4-20 mA current loop: 7 Vdc plus load voltage drop min; 50 Vdc max

FMG83, FMG84: 500 pulses/liter (1892 pulses/gallon),
FMG81, FMG82: 1,000 pulses/liter (3785 pulses/gallon).

10-15 Vdc, 150 mA (linear power supply recommended)

>20 microSiemens

Hardware/software, conductivity-based

NEMA 4X standard; IP 66 Splashproof standard

INSTALLATION and CONNECTIONS

INSTALLATION

Positioning. The FMG80 can be mounted vertically or horizon-

tally. It is important to choose a position that will ensure full
pipe. (Under certain conditions of empty or partially-full pipe
the meter may give a pulse out when there is no ow.) With a
zero straight pipe requirement after an elbow, the FMG80 me­ter can be installed in tight spaces.

Mounting. The FMG80 may be supported by its piping con­nections IF the piping is rigid. The meter and pipe must be per­fectly aligned with no exion at the ttings to prevent damage
to the meter and leakage. It is highly recommended to use the
mounting bracket provided. The mounting bracket uses two #8
screws on a 1.5” center.

Piping. Metal pipe, metal tube, or plastic tubing can be used
with the meter. NPT adapters should be hand-tightened onto
the ttings to avoid damage to internal O-ring seals. Thorough­ly clean the pipe threads and nose and apply Teon tape to
adapter threads. Hold ttings/adapters with a wrench while
tightening the pipe to prevent damage to the meter.

Power Supply. A 12 Vdc linear, regulated power supply with an
output current of at least 0.25A is recommended. If a switch­ing power supply must be used, consult Omega for approved
manufacturer’s model numbers.

CONNECTIONS

Power and signal connections are provided through the 8­pin male bulkhead connector on the meter housing. See the
Pin Assignment and Connections diagrams below. If using an
Omega cable, the wire colors in the table below will be accu­rate; if using cable from another source, use the pin assign­ments as your wiring guide.

5

4 6

3 7

8

2 1

Cable Plug Contact

Arrangement

In addition, it is necessary for proper operation to ground the
unit to a good quality earth ground. Assure negative power
supply is grounded to earth and to the entire electrical/me­chanical system. If metal piping is used, jumper inlet and
outlet pipes together and connect to ground for best results
in metering accuracy.

Pin# Function Color

1 Pulse (-) White
2 Ground Brown
3 Pulse (+) Green
4 4-20 (+) Yellow
5 Not Used Grey
6 Not Used Pink
7 4-20 (-) Blue
8 Power (+) Red

OPERATION

The meter will output one pulse when powered up. The newly­installed meter takes from a few seconds to a minute for the
signal to stabilize at startup, especially if it has been dry. In
normal operation, keep the meter lled with uid and pow­ered on to prevent this delay. When the meter is mounted
properly, an empty pipe detection feature will normally detect
absence of liquid in the pipe and register zero ow.

The 4-20 mA signal outputs 4 mA at zero ow and 20 mA at

TROUBLESHOOTING

20 gallons/minute ow or 3 gallons per minute, depending
on model. The pulse signal is a 50% duty cycle pulse set at
FMG83, FMG84: 500 pulses/liter (1892 pulses/gallon),
FMG81, FMG82: 1,000 pulses/liter (3785 pulses/gallon).

Problem

No output

Flow rate incorrect

Probable Causes Try...

Reversed ow direction

Empty pipe

Flow rate below minimum

Loose or incorrect wiring

Fluid conductivity too low

Electrical noise

Fluid conductivity too low

Empty pipe

Electrical noise

Reverse ow connections

Check piping conditions

Select a different owmeter

Check electrical connections

Select a different owmeter

Relocate meter or reduce noise

Select another owmeter

Check piping conditions

Relocate meter or reduce noise

Notes:

WARRANTY/DISCLAIMER

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 rtment 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 design limits,
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 rol. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.

OMEGA is pleas ed to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any
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 TATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTA B I L I T Y
AND FITNESS FOR A PA RTICULAR 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 upon which lia bili ty is b ased. In no even t shal l OMEG A be li able for
consequential, 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 TY/ DISCLAIMER 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.

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) NUMBER F R O M OMEGA’S CUSTOMER S E RVIC E D E PA RT MENT (IN OR D E 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.

FOR WARRANTY RETURNS, please have the
following information available BEFORE
contacting OMEGA:

1 . P u rchase 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.

FOR NON-WARRANTY REPAIRS,

consult OMEGA
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.

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.

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