Omega FMG90 User Manual

User’s Guide

Shop online at

omega.com

e-mail: [e-mail]

For latest product manuals:

omegamanual.info

FMG90 Series

Electromagnetic Flow Meter

Table of contents page

1 About this operating manual....................................................................................4

2 Device description...................................................................................................5

2.1 Intended use....................................................................................................6

2.1 Exclusion of liability .........................................................................................6

3 Safety instructions...................................................................................................7

4 Construction and function .......................................................................................8

5 Installation...............................................................................................................8

5.1Installation instructions ...........................................................................................9

5.2 Assembly.......................................................................................................10

6 Electrical connection .............................................................................................11

7 Commissioning and measuring operation .............................................................12

7.1 Commissioning .............................................................................................. 12

7.2 Measuring operation......................................................................................12

8 Maintenance..........................................................................................................12

9 Disassembly and disposal.....................................................................................13

10 Technical data.......................................................................................................14

10.1 Materials table ..............................................................................................15

10.2 Pressure drop...............................................................................................15

10.3 Dimensions................................................................................................... 16

Copyright notice:

The reproduction, distribution and utilization of this operating manual as well as the
communication of its contents to others without express authorization is prohibited.
Offenders will be held liable for the payment of damages. All rights reserved in the event of
the grant of a patent, utility model or design.

1 About this operating manual

• The operating manual is aimed at specialists and semi-skilled personnel.

• Before each step, read through the relevant advice carefully and keep to the specified order.

• Thoroughly read and understand the information in the section (Safety Instructions

If you have any problems or questions, please contact:

One Omega Dr. Box 4047
Stamford, CT 06907-0047

Tel: [phone]

e-mail: [e-mail]

"3").

Hazard signs and other symbols used:

WARNING! / CAUTION! Risk of injury!
This sign indicates dangers that cause personal injuries that can lead to health defects or
cause considerable damage to property.

CAUTION! Electric current!
This sign indicates dangers which could arise from handling of electric current.

CAUTION! Material damage!
This sign indicates actions which could lead to possible damage to material or environmental
damage.

ADHERE TO OPERATING MANUAL!

NO DOMESTIC WASTE!
The device must not be disposed of
together with domestic waste.

Pay attention to and comply with

information that is marked with this symbol.

ª Follow the specified instructions and steps.

Adhere to the given order.

NOTICE!
This symbol indicates important notices,
tips or information.

 Check the specified points or notices.
J Reference to another section, document or

source.

• Item.

2 Device description

The FMG90 series from Omega, is a non-contact flow sensor. The measurement is
performed using magnetic induction and works without any moving parts.

The FMG90 is used for measuring or metering water and aqueous solutions. The compact
design and independence from the intake and discharge sections allows the FMG90 to be
used under a variety of conditions.

Components:

c Sensor housing:

The sensor housing consists of plastic and has the IP65 degree of protection.

d Electrical connection:

The electrical connection is made via 4-pin plug M12x1.

e Operation / flow indicator LED.

f Type plate with flow direction (marking)

g Process connection:

The process connections are available in different sizes.

2.1 Intended use

The magnetic inductive flow sensor FMG90 must only be used for measuring and metering
liquids with a minimum conductivity of 20 μS/cm.

WARNING! No safety component!

The magnetic inductive flow sensor of the series FMG90 are not safety components in
accordance with Directive 2006-42-EC (Machine Directive).

ª Never use the FMG90 as a safety component.

The operational safety of the device supplied is only guaranteed within its intended use. The
specified limits (see Technical Data "10") may under no circumstances be exceeded.

Before installing the device, check that the wetted materials of the device are compatible with
the media being used (see Materials Table "10.1").

Measuring tube empty (or partially filled). / Conductivity too low.
The green LED may blink irregularly if the measuring tube of the FMG90 is empty or
partially filled or if the conductivity of the fluid being used is too low. Random pulses will
be present at the output, but they do not represent an actual flow.
ª Ensure that the measuring tube of the FMG90 is always completely filled (see

Installation Instructions "5.1").

ª Ensure that the conductivity of the fluid is at least 20 μS/cm.

2.1 Exclusion of liability

We accept no liability for any damage or malfunctions resulting from incorrect installation,
inappropriate use of the device or failure to follow the instructions in this operating manual.