Omega Products FMG-551 Installation Manual

2

MANCHESTER, UK

T

User’s Guide

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STAMFORD, C

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FMG-550 SERIES

OMEGAMAG

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

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dy 1868, 733 01 Karvin. 8

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®

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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.

FMG-550 Series OMEGAMAG

0

SAFETY INSTRUCTIONS

1. Depressurize and vent systems without Hot-tap valve 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 disassemble or alter product construction.

6. Disconnect power before attempting any service or wiring.

Specifi cations

Wetted Materials:

• 316L Stainless Steel body and electrodes

• PVDF Insulator

• O-rings: FPM standard, EPDM, Kalrez® optional

• Cable: 4-cond + shield, PVC jacket (Fixed cable models)

• Watertight rubber cable assembly w/NEMA 6P connector
(Submersible cable models)

Power Requirements

• 4 to 20 mA: 24 VDC nominal, 22.1 mA maximum

(21.6 VDC min. to 26.4 max.)
400 mV p-p maximum ripple voltage

• Frequency: 5 to 24 VDC nominal, 15 mA maximum

(5 VDC min. to 26.4 VDC max.)

• Reverse polarity and short circuit protected

Performance

• Pipe size range: 2 in. to 48 in.

• Minimum Flow Range 0.05 m/s (0.15 ft/s)

Maximum Flow range: 10 m/s (33 ft/s)

• Linearity: ±1% reading + 0.1% of max. range

• Repeatability ±0.5% of reading @ 25°C

• Accuracy: ±2% of measured value (in
reference conditions where the fl uid is water at ambient
temperature, the appropriate upstream and downstream
distances are observed, the sensor is inserted at the correct
depth and there is a fully developed fl ow profi le which is in
compliance with ISO 7145-1982 (BS 1042 section 2.2))

• Minimum Conductivity: 20 µS/cm

Output Specifi cations

Current output (4 to 20 mA)

• Programmable and reversible

• 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.)

• Max. Loop Resistance: 300 Ω

• Error condition: 22.1 mA

Tests, Approvals & Standards

• CE

• EN 61326 Emissions and Immunity for Control Equipment
Immunity: EN 61000-6-1
Emissions: EN 55011 class B

Environmental

• NEMA 4 / IP65 (Fixed cable models only)

• NEMA 6P / IP68 (Submersible cable models only)

• Storage Temperature: -15°C to 70°C (5°F to 158°F)
(non-icing conditions)

• Operating Temperature (non-icing conditions)
Ambient: -15°C to 70°C (5°F to 158°F)
Media: -15°C to 85°C (5°F to 185°F)

• Max. operating pressure:20.6 bar @ 25°C (300 psi @ 77°F)

bar psi

20.6

300

19.8
275

18.1
250

16.4

225

14.7

200

12.9

175

11. 2
150

9.5

125

7.8

6.0

4.3

2.6

0.9

100

°C

75

50

25

-10

5

°F

23

Safe to operate Hot-tap

Safe Media Pressure
and
Temperature Range

0

10

20-20 30 40 50 60 70 80 90

59 71

95 113 131

41

100

158 185 212

Frequency output:

• Max. Pull-up Voltage: 30 VDC

• Short Circuit Protected: ≤30 V @ 0Ω pull-up for one hour

• Reverse Polarity Protected to -40 V for 1 hour

• Overvoltage Protected to +40 V for 1 hour

• Minimum Current Sink: 50 mA

• Maximum cable: 300 m (1000 ft.)

1Omega 550 Series Magmeter

Selecting a Location

• The FMG-55x requires a fully developed turbulent fl ow profi le
for accurate measurement.

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

• New magmeters should be allowed to soak in a full pipe for
24 hours before operation. This is especially important if the
conductivity of the process liquid is less than 100 μS.

• FMG-55x Magmeters equipped with the submersible cable
are rated NEMA 6P (IP68). These units can withstand
submersion to depths no greater than 2 m (6 ft.) for
prolonged periods.

• FMG-55x Magmeters with fi xed cables are rated NEMA 4 /
IP65. They are NOT suitable for submersion.

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

Dimensions

FMG-551, -552 models

206 mm

8.1 in.

FMG-553, -554 models

257 mm

10.1 in.

131 mm

5.14 in.

32 mm

1.25 in.

76 mm

3.0 in.

FMG-551, -552 models

238 mm

9.38 in.

FMG-553, -554 models

289 mm

11.38 in.

Inlet Outlet

Flange

10 x I.D. 5 x I.D.

2 x 90° Elbow

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

+GF+

+GF+

Reducer

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

2 x 90° Elbow
3 dimensions

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

+GF+

+GF+

90° Elbow

Valve/Pump

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.
NOTE: The system should be designed to keep the sensor wet at
all times.

O.K.O.K. O.K.

+
F
G

+

GF

+GF+

+

+

41 mm

1.6 in.

FMG-551, -552 models

187 mm/7.38 in.

FMG-553, -554 models

238 mm/9.38 in.

1.0 in.

+GF+

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

+GF+

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

1¼ in. NPT

threads

25.4 mm

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

+GF+

+

+
GF

+

G

Stroke length

F

+

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

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

-45°

Mounting the sensor upright is OK only where the pipe is full and
no air pockets are present at the top of the pipe.

Mount at a maximum of 45° when air bubbles are present.

Do not mount on the bottom of the pipe if sediments are present.

+45°

2 Omega 550 Series Magmeter

Standard Magmeter Installation

The following items are required to properly install the Magmeter:

• Supplied with FMG-551 and FMG-552 Magmeters:

• 12-inch Ruler

• Brass alignment rod

• H-dimension value for your pipe (See pages 9-10)

• Hex wrench

• 2 clamp rings

1. Prepare the pipe:

• Cut a 32 mm (1¼ in.) opening in the pipe.

• Install a 1¼ inch outlet onto the pipe.

This fi tting must withstand pressures up to 20 bar (300 psi).

2. Install the Magmeter into the pipe

• Apply sealing tape or paste to the male threads of the sensor
nut and thread it securely into the pipe fi tting.

The sensor is marked to identify the downstream

alignment. The arrow MUST point DOWNSTREAM.

Wear gloves to grip the sensor. Hold the sensor
securely while threading the sensor nut into the fi tting. Do not
allow the magmeter cable to become twisted while turning
the nut.

• Not supplied:

• Female pipe fi tting (weld-on or saddle)
with 1¼ in. NPT or ISO 7/1-Rc 1¼ threads

• 32 mm (1¼ in.) diameter drill

• Pipe thread sealant suitable for application

• Pipe wrench

FLOW →

FLOW →

3. Adjust the magmeter position and insertion depth

• Find the H-dimension for your specifi c pipe size on pages 9-10.

• Insert the brass rod through the alignment opening at the top of
the sensor.

• Adjust the height of the magmeter so the distance (H) from the
OUTSIDE of the pipe to the bottom of the alignment rod is equal
to the H-dimension.

• Adjust the alignment rod so it is parallel to the pipe ±1°.

Misalignment will cause inaccurate measurement.

• A dry lubricant is applied to the threaded column at the factory.

If necessary, re-apply a suitable lubricant to the threaded column

to facilitate smooth operation.

Align Magmeter with pipe ±1°

4. Secure the Magmeter in position

• Secure the fi tting by tightening the set screw on the side of the sensor assembly.
A set screw wrench is provided in the magmeter package.

• Secure the height adjustment by installing the two pipe clamps.

• Spread the clamp apart to wrap it around the threaded stem.

• Place one clamp immediately above and one clamp immediately below the
magmeter adjustment hub.

• Squeeze the clamp together until it is fi rmly locked around the threads.

Pipe Top View

H

FLOW →

FLOW →

Set Screw

FLOW →

Hex Wrench

FLOW →

3Omega 550 Series Magmeter