Omega FMG3000 User Manual

User’s Guide

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ISO 9001

CERTIFIED

CORPORATE QUALIT Y

STAMFORD, CT

ISO 9002

CERTIFIED

CORPORATE QUALIT Y

MANCHESTER, UK

FMG-3000 SERIES Blind Version

Magmeter

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USA: One Omega Drive, P.O. Box 4047

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dy 1868, 733 01 Karvin. 8

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

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts
no liability for any errors it contains, and reserves the right to alter specifi cations without notice.
WARNING: These products are not designed for use in, and should not be used for, patient-connected applications.

Omega FMG-3000 Series Magmeter

Topic: Page

1. Quick Start Guide 1

2. Specifi cations 2

3. Installation: Pipe Fittings 3

4. Selecting a Location 3

5. Hardware Confi guration 4

Topic: Page

7. Wiring the Magmeter with 4 to 20 mA Loop out 5

8. Wiring the Magmeter with Frequency Output 6

9. Calibration Data 7

10. Maintenance and Troubleshooting 11

11. Ordering Information 12

6. General Installation and Grounding Tips 5

1. Quick Start Guide

This manual contains the general installation, wiring and calibration data for the Omega FMG-3000 Series Magmeter with Frequency or
Current output. The basic steps are outlined on this page. See each referenced section for detailed information.

HAND-TIGHTEN THE THREADED NUT ONTO THE
INSTALLATION FITTING. DO NOT USE TOOLS!
DO NOT USE THREAD SEALANT OR LUBRICANTS ON
THE FITTING THREADS OR THE SENSOR CAP.

1. Position the PIPE SIZE Jumper according

to your pipe size. See Sec. 5 Pg. 6.

2. Install the Magmeter into the pipe.

Use Omega installation fi ttings ONLY.
The installation fi tting is critical to

Magmeter performance.

See Sec. 3-4, Pg. 5.

3. Connect POWER and OUTPUT wiring.

FMG-3001 and FMG-3101 Frequency out:

See Sec. 8 Pg. 8.

FMG-3002 and FMG-3102 current out

wiring: See Sec. 7 Pg. 7.

FREQUENCY OUT
DO NOT REMOVE

1.

Sensor Type Pipe Size Jumper Position

½ in. to 2½ in.

FMG3001 DN15 to DN65

FMG3002 3 in. to 4 in.
DN80 to DN100

FMG3101 5 in. to 6 in.
FMG3102 DN125 to DN150

8 in.
DN200

FMG3201 10 in. to 12 in.
FMG3202 DN250 to DN300

Connect output signals and power
to this 4-terminal block.

JP2

4

3

2

1

3.

3.

4.

GROUNDING

Without a good Earth Ground, the

Magmeter may not operate effi ciently. See
Sec. 6 Pg. 7.

4. Route the wiring out through the two cable

ports. Use appropriate hardware to secure
the FMG-3000 from moisture intrusion.
One Liquid Tight Connector is included.
See Sec. 5 Pg. 6.

2.

3

SAFETY INSTRUCTIONS

1. Depressurize and vent system prior to installation or removal.

2. Confi rm chemical compatibility before use.

3. Do not exceed maximum temperature/pressure specifi cations.

4. Wear safety goggles or face shield during installation/service.

5. Do not alter product construction.

6. Disconnect power before attempting any service or wiring.

2. Specifi cations

Wetted Materials:

• Sensor body, electrodes and grounding ring:

• -PP: Polypropylene and 316L Stainless Steel

• -PVDF and 316L Stainless Steel

• O-rings: FPM standard
EPDM, (Perfl uoroelastomer optional)
Other Materials:

• Case: PBT

• Ground terminal: 316 Stainless Steel

Power Requirements

• 4 to 20 mA: 21.6 to 26.4 VDC, 22.1 mA maximum
400 mV p-p maximum ripple voltage

• Frequency: 5 to 26.4 VDC, 15 mA maximum

• Reverse polarity and short circuit protected

psi

bar

200

14

160

11

120

8

80

6

40

3

Operating Pressure

Pressure vs. Temperature

FMG-3000 series
Operating
Range

Performance

• Pipe Size Range: FMG-3000: ½ in. to 4 in.
FMG-3100: 5 in. to 8 in.
FMG-3200: 10 in. to 12 in.

• Flow Range Minimum: 0.05 m/s (0.15 ft/s)
Maximum: 10 m/s (33 ft/s)

• Linearity: ±(1% reading + 0.01 m/s)
±(1% reading + 0.033 ft/s)

• Repeatability ±0.5% of reading @ 25 °C

• Minimum Conductivity: 20 μS/cm

Output Specifi cations
Current output (4 to 20 mA)

• Programmable and eversible

• Loop Accuracy: 32 μA max. error
(@ 25 °C @ 24 VDC)

• Temp. drift: ±1 μA per °C max.

• Power Supply Rejection: ±1 μA per V

• Isolation: Low voltage <48 VAC/DC
from electrodes and auxiliary power

• Maximum Cable: 300 m (1000 ft)

• Maximum Loop Resistance: 300 

• Error Condition: 22.1 mA

Frequency output:

• Max. Pull-up Voltage: 30 VDC

• Short Circuit Protected: 30 V @ 0  pull-up for one hour

• Reverse Polarity Protected - 40 V

• Overvoltage Protected to 40 V with pull-up resistor

• Max. Current Sink: 50 mA, current limited

• Maximum cable: 300 m (1000 ft)

Environmental Requirements

• Storage Temperature: -20 to 70 °C (-4 to 158 °F)

• Relative Humidity: 0 to 95% (non-condensing)

• Operating Temperature
Ambient: -10 to 70 °C (14 to 158 °F)
Media: 0 to 85 °C (32 to 185 °F)

°F

°C

0 40 80 120 160 200

-18 4

27

49

71 93

240

115

Media Temperature

Max. Operating Pressure: 10.3 bar @ 25 °C (150 psi @ 77 °F)

1.4 bar @ 85 °C (20 psi @ 185 °F)

Tests, Approvals & Standards

• NEMA 4X

• CE

Dimensions

94 mm
(3.7 in.)

79.25 mm
(3.12 in.)

3000 series = 58 mm (2.3 in.)
3100 series = 91 mm (3.6 in.)
3200 series = 167 mm (6.6 in.)

4

3. Installation: Pipe fi ttings

Omega offers a wide selection of installation fi ttings that control the position of the Magmeter electrodes in relation to the dimensions of
the pipe. You will fi nd a complete list of order numbers for installation fi ttings in the Calibration tables on pages 8-12.

Type Description

Plastic
tees

PVC
Glue-on
Saddles

0.5 to 2 inch versions
MPVC or CPVC

Available in 10 and 12 inch sizes only
Cut 2-1/2 inch hole in pipe
Weld in place using solvent cement

PVC
Saddles

2 to 4 inch, cut 1-7/16 inch hole in pipe
6 to 8 inch, cut 2-1/8 inch hole in pipe

Type Description

Iron, Carbon Steel,
316 SS Threaded
tees

Carbon steel &
stainless steel
Weld-on
Weldolets

Fiberglass
tees

FPT

Iron
Strap-on
saddles

2 to 4 inch, cut 1-7/16 inch hole in pipe
Over 4 inch, cut 2-1/8 inch hole in pipe
Special order 14 in. to 36 in.

Metric
Union
Fitting

4. Selecting a Location

• The FMG-3000 requires a full pipe and a fully developed turbulent fl ow profi le for
accurate measurement.

• If the piping system harbors air pockets or bubbles, take steps to locate the sensor
so the air pockets will not contact the electrodes.

• In vertical installations, assemble the unit so the conduit ports are facing downward.
This prevents condensation inside the conduit from being directed into the
electronics housing.

• Chemical injection systems can temporarily alter the fl uid conductivity and cause
anomalies in the magmeter measurement.

To avoid this problem, install the Magmeter UPSTREAM of the injection point.

0.5 to 2 in. versions
Mounts on threaded pipe ends

2 to 4 inch, cut 1-7/16 inch hole in pipe
Over 4 inch, cut 2-1/8 inch hole in pipe

1.5 in. to 2 in. PVDF insert

For pipes from DN 15 to 50 mm
PP or PVDF

Flow 6.25 GPM

Total 1234567.8>

Signet Flow

Transmitter

Flow 6.25 GPM

Total 1234567.8>

Signet Flow

Transmitter

Flow

ENTER

Flow

ENTER

Select a location with suffi cient distance of
straight pipe immediately upstream of the
sensor.

Locating the sensor in a trap or where the fl ow
is upward helps to protect the sensor from
exposure to air bubbles when the system is in
operation.

These confi gurations are not recommended
because it is diffi cult to keep the pipe full.

In a gravity-fl ow system, the tank must be designed
so the level does not drop below the outlet.

2 x 90° Elbow

25 x I.D. 5 x I.D.

Reducer

15 x I.D. 5 x I.D.

2 x 90° Elbow
3 dimensions

40 x I.D. 5 x I.D.

90° Elbow

20 x I.D. 5 x I.D.

Pump/Valve

50 x I.D. 5 x I.D.

OKOK OK

+

GF

+

GF

+GF+

+GF+

+

Vertical flow is OK if the pipe remains full at all times.

+
GF

+

+

This causes the pipe to draw air in from the tank.
If air bubbles pass across the Magmeter electrodes,
the output will become erratic.

5