KROHNE OPTIFLUX 7300 User manual

Electromagnetic flowmeter with non wetted electrodes
and ceramic liner
OPTIFLUX 7300
OPTIFLUX 7300OPTIFLUX 7300
OPTIFLUX 7300 Quick Start
Quick StartQuick Start
Quick Start
© KROHNE 10/2020 - 4008325701 - QS OPTIFLUX 7300 R03 en

CONTENTS
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OPTIFLUX 7300
1 Safety instructions 3
2 Installation 4
2.1 Scope of delivery............................................................................................................... 4
2.2 Device description ............................................................................................................ 5
2.3 Nameplates ...................................................................................................................... 6
2.4 Storage ............................................................................................................................. 7
2.5 Transport .......................................................................................................................... 7
2.6 Pre-installation requirements ......................................................................................... 7
2.7 General requirements ...................................................................................................... 8
2.7.1 Vibrations ................................................................................................................................ 8
2.7.2 Magnetic field.......................................................................................................................... 8
2.8 Installation conditions ...................................................................................................... 9
2.8.1 Inlet and outlet ........................................................................................................................ 9
2.8.2 Bends in 2 or 3 dimensions..................................................................................................... 9
2.8.3 T-section ............................................................................................................................... 10
2.8.4 Bends .................................................................................................................................... 10
2.8.5 Open discharge ..................................................................................................................... 11
2.8.6 Control valve ......................................................................................................................... 11
2.8.7 Pump ..................................................................................................................................... 11
2.8.8 Air venting ............................................................................................................................. 12
2.8.9 Temperatures ....................................................................................................................... 12
2.8.10 Flange deviation .................................................................................................................. 13
2.8.11 Mounting position................................................................................................................ 13
2.9 Mounting ......................................................................................................................... 14
2.9.1 Torques and pressures sandwich versions.......................................................................... 14
2.9.2 Torques and pressures flanged versions............................................................................. 16
3 Electrical connections 18
3.1 Safety instructions.......................................................................................................... 18
3.2 Grounding ....................................................................................................................... 18
3.3 Connection diagrams ..................................................................................................... 19
4 Technical data 20
4.1 Dimensions and weights ................................................................................................ 20

SAFETY INSTRUCTIONS 1
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Warnings and symbols used
HANDLING
• This symbol designates all instructions for actions to be carried out by the operator in the
specified sequence.
i RESULT
RESULTRESULT
RESULT
This symbol refers to all important consequences of the previous actions.
Safety instructions for the operator
DANGER!
This information refers to the immediate danger when working with electricity.
DANGER!
These warnings must be observed without fail. Even partial disregard of this warning can lead to
serious health problems and even death. There is also the risk of seriously damaging the device
or parts of the operator's plant.
WARNING!
Disregarding this safety warning, even if only in part, poses the risk of serious health problems.
There is also the risk of damaging the device or parts of the operator's plant.
CAUTION!
Disregarding these instructions can result in damage to the device or to parts of the operator's
plant.
INFORMATION!
These instructions contain important information for the handling of the device.
CAUTION!
Installation, assembly, start-up and maintenance may only be performed by appropriately
trained personnel. The regional occupational health and safety directives must always be
observed.
LEGAL NOTICE!
The responsibility as to the suitability and intended use of this device rests solely with the user.
The supplier assumes no responsibility in the event of improper use by the customer. Improper
installation and operation may lead to loss of warranty. In addition, the "Terms and Conditions of
Sale" apply which form the basis of the purchase contract.
INFORMATION!
• Further information can be found in the manual, on the data sheet, in special manuals,
certificates and on the manufacturer's website.
• If you need to return the device to the manufacturer or supplier, please fill out the form
contained in the manual and send it with the device. Unfortunately, the manufacturer cannot
repair or inspect the device without the completed form.

2INSTALLATION
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2.1 Scope of delivery
INFORMATION!
Inspect the packaging carefully for damages or signs of rough handling. Report damage to the
carrier and to the local office of the manufacturer.
INFORMATION!
Do a check of the packing list to make sure that you have all the elements given in the order.
Figure 2-1: Scope of delivery
1 Ordered flowmeter (sandwich or flanged version)
2 Product documentation
3 Factory calibration report
4 Grounding rings (optionally)
INFORMATION!
Assembly materials and tools are not part of the delivery. Use the assembly materials and tools
in compliance with the applicable occupational health and safety directives.

INSTALLATION 2
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2.2 Device description
Your measuring device is supplied ready for operation. The factory settings for the operating
data have been made in accordance with your order specifications.
The following version is available:
•Compact version (the signal converter is mounted directly on the measuring sensor)
INFORMATION!
Product specific information and extensive product specification is available using PICK, the
Product Information Center KROHNE web-tool.
PICK can be found via the service menu button on the KROHNE.com website.
Figure 2-2: Available versions
1 Sandwich version
2 Flanged version

2INSTALLATION
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2.3 Nameplates
INFORMATION!
Check the device nameplate to ensure that the device is delivered according to your order.
Additional information (e.g. correct supply voltage), can be found in the documentation of the
signal converter.
1 Name and address of the manufacturer.
2 Type designation of the flowmeter and CE sign with number(s) of notified body / bodies.
3 Calibration data.
4 Main supply data.
5 PED data.

INSTALLATION 2
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2.4 Storage
•Store the device in a dry and dust-free location.
•Avoid lasting direct exposure to the sun.
•Store the device in its original packaging.
•Storage temperature: -50...+70°C / -58...+158°F
2.5 Transport
Compact version
•Do not lift the device by the signal converter housing.
•Do not use lifting chains.
•To transport the device, use lifting straps.
2.6 Pre-installation requirements
Make sure that you have all necessary tools available:
•Allen key (4 mm)
•Small screwdriver
•Wrench for cable glands
•Wrench for wall mounting bracket (remote version only)
•Torque wrench for installing flowmeter in pipeline
Figure 2-3: Transport

2INSTALLATION
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2.7 General requirements
2.7.1 Vibrations
2.7.2 Magnetic field
INFORMATION!
The following precautions must be taken to ensure reliable installation.
• Make sure that there is adequate space to the sides.
• Protect the signal converter from direct sunlight and install a sun shade if necessary.
• Signal converters installed in control cabinets require adequate cooling, e.g. by fan or heat
exchanger.
• Do not expose the signal converter to intense vibration. The flowmeters are tested for a
vibration level in accordance with EN/IEC 60068-2-64.
• Avoid magnetic field! Keep at least 5 DN distance between electromagnetic flow sensor.
Figure 2-4: Avoid vibrations
Figure 2-5: Avoid magnetic fields

INSTALLATION 2
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2.8 Installation conditions
2.8.1 Inlet and outlet
Use straight inlet and outlet pipe sections to prevent flow distortion or swirl, caused by bends
and T-sections.
2.8.2 Bends in 2 or 3 dimensions
INFORMATION!
Support the pipeline on both side of the flowmeter. Make sure the M12 connector is on the flow
inlet side.
Figure 2-6: Recommended inlet and outlet sections
1 Refer to chapter "Bends in 2 or 3 dimensions"
2 t2 DN
Figure 2-7: 2 and/or 3 dimensional bends upstream of the flowmeter
1 2 dimensions = X/Y
2 3 dimensions = X/Y/Z
Inlet length: using bends in 2 dimensions: t5 DN; when having bends in 3 dimensions: t10 DN
INFORMATION!
2 dimensional bends occur in a vertical or
oror
or horizontal plane (X/Y) only, while 3 dimensional bends
occur in both vertical and
andand
and horizontal plane (X/Y/Z).

2INSTALLATION
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2.8.3 T-section
2.8.4 Bends
Figure 2-8: Distance after T-sections
1 t10 DN
Figure 2-9: Installation in bending pipes (90°)
Figure 2-10: Installation in bending pipes (45°)
CAUTION!
Avoid draining or partial filling of the flow sensor

INSTALLATION 2
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2.8.5 Open discharge
2.8.6 Control valve
2.8.7 Pump
Figure 2-11: Installation before an open discharge
Figure 2-12: Installation before control valve
Figure 2-13: Installation after pump

2INSTALLATION
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2.8.8 Air venting
2.8.9 Temperatures
Figure 2-14: Air venting
1 t5 m
2 Air ventilation point
Figure 2-15: Temperatures
1 Process temperature
2 Ambient temperature
3 Sunshade
CAUTION!
Protect the device from direct sunlight.

INSTALLATION 2
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2.8.10 Flange deviation
2.8.11 Mounting position
CAUTION!
Max. permissible deviation of pipe flange faces:
L
max
- L
min
d0.5 mm / 0.02"
Figure 2-16: Flange deviation
1 L
max
2 L
min
Figure 2-17: Mounting position

2INSTALLATION
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2.9 Mounting
2.9.1 Torques and pressures sandwich versions
Max. torque:
•Step 1: approx. 50% of max. torque
•Step 2: approx. 80% of max. torque
•Step 3: 100% of max. torque given in tables
EN 1092-1
ASME B 16.5
WARNING!
• Use stainless steel A2 / 6.9 class bolts.
• Make sure the connecting flanges are of type raised face (RF).
Figure 2-18: Tighten the bolts in fixed order, see picture.
Nominal size
DN [mm]
Pressure rating Max. allowable operating pressure
[bar]
25...80 PN 40 40
100 PN 16 16
100 PN 25 25
Nominal size
[inch]
Pressure rating Max. allowable operating pressure
[psig]
1...4" 150 lb 230
1...3" 300 lb 580

INSTALLATION 2
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EN 1092-1
ASME B 16.5 (150 lb)
ASME B 16.5 (300 lb)
Nominal
size
DN [mm]
Counter flanges
& bolts
Max. allowable torque
Gasket:
Filled PTFE / PTFE / PF29
Gasket:
Graphite
Rating Size Nm ft-lb Nm ft-lb
25 PN 40 M12 x 141 22 16 32 24
40 PN 40 M16 x 176 47 35 66 49
50 PN 40 M16 x 203 58 43 82 60
80 PN 40 M16 x 261 48 35 69 51
100 PN 16 M16 x 303 75 55 106 78
100 PN 25 M20 x 176 94 69 133 98
Nominal
size
DN [inch]
Counter flanges
& bolts
Max. allowable torque
Gasket:
Filled PTFE / PTFE /
PF29
Gasket:
Graphite
Rating Size Nm ftlb Nm ftlb
1" 150 lb 1/2"UNC x 142 24 18 33 24
1 ½"150 lb 1/2"UNC x 174 38 28 54 40
2" 150 lb 5/8"UNC x 215 58 43 83 61
3" 150 lb 5/8"UNC x 268 98 72 138 102
4" 150 lb 5/8"UNC x 318 75 55 108 80
Nominal
size
DN [inch]
Counter flanges
& bolts
Max. allowable torque
Gasket:
Filled PTFE / PTFE / PF29
Gasket:
Graphite
Rating Size Nm ftlb Nm ftlb
1" 300 lb 1" 20 15 28 21
1 ½"300 lb 1 ½"43 32 61 45
2" 300 lb 2" 61 45 87 64
3" 300 lb 3" 58 43 83 61
4" 300 lb 4" 85 63 112 90

2INSTALLATION
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2.9.2 Torques and pressures flanged versions
Tighten the bolts in fixed order, see picture:
•Step 1: by hand
•Step 2: approx. 25% of max. torque
•Step 3: approx. 50% of max. torque
•Step 4: approx. 80% of max. torque
•Step 5: 100% of max. torque given in table
WARNING!
Use stainless steel A2 / 6.9 class bolts.
CAUTION!
Please take care to use the proper gasket to prevent damaging the liner of the flowmeter. In
general, the use of spiral wound gaskets is not advised, as it could severely damage the liner of
the flowmeter.
INFORMATION!
Diameters DN80 and DN100 have 8 holes per flange, please continue in the same way to tighten
the other bolts.
CAUTION!
With the instrument, 4 PTFE sealing rings are included (2 to be used with installation,
2 as spare). No other gaskets are required.

INSTALLATION 2
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EN 1092-1
ASME B 16.5 (150 lb)
ASME B 16.5 (300 lb)
Nominal size
DN [mm]
Counter flanges Recommended torque [Nm]
Rating Bolts Min. Max.
25 PN 40 4 x M 12 50 70
40 PN 40 4 x M 16 100 175
50 PN 40 4 x M 16 100 175
80 PN 40 8 x M 16 100 175
100 PN 16 8 x M 16 100 175
Nominal size
DN [inch]
Counter flanges Recommended torque [ftlb]
Rating Bolts Min. Max.
1" 150 4 x ½"40 80
1½"150 4 x ½"60 80
2" 150 4 x 5/8" 80 160
3" 150 4 x 5/8" 100 160
4" 150 8 x 5/8" 100 160
Nominal size
DN [inch]
Counter flanges Recommended torque [ftlb]
Rating Bolts Min. Max.
1" 300 4 x ¾"40 180
1½"300 4 x ¾"60 180
2" 300 8 x 5/8" 80 96
3" 300 8 x ¾"100 180

3ELECTRICAL CONNECTIONS
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3.1 Safety instructions
3.2 Grounding
DANGER!
All work on the electrical connections may only be carried out with the power disconnected.
Take note of the voltage data on the nameplate!
DANGER!
Observe the national regulations for electrical installations!
DANGER!
For devices used in hazardous areas, additional safety notes apply; please refer to the Ex
documentation.
WARNING!
Observe without fail the local occupational health and safety regulations.
Any work done on the electrical components of the measuring device may only be carried out by
properly trained specialists.
INFORMATION!
Look at the device nameplate to ensure that the device is delivered according to your order.
Check for the correct supply voltage printed on the nameplate.
DANGER!
The device must be grounded in accordance with regulations in order to protect personnel
against electric shocks.
Figure 3-1: Grounding
1 Metal pipelines, not internally coated. Grounding without grounding rings.
2 Metal pipelines with internal coating and non-conductive pipelines. Grounding with grounding rings.

ELECTRICAL CONNECTIONS 3
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Grounding ring number 1 (for type VN19):
•3 mm / 0.12" thick (tantalum: 0.5 mm / 0.02")
3.3 Connection diagrams
Figure 3-2: Grounding ring number 1
INFORMATION!
For the connection diagrams refer to the documentation of the applicable signal converter.

4TECHNICAL DATA
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4.1 Dimensions and weights
Sandwich version
Sandwich versionSandwich version
Sandwich version a = 155 mm / 6.1"
b = 230 mm / 9.1" 1
c = 260 mm / 10.2"
Total height = H + a
Flanged version
Flanged versionFlanged version
Flanged version a = 155 mm / 6.1"
b = 230 mm / 9.1" 1
c = 260 mm / 10.2"
Total height = H + a
1The value may vary depending on the used cable glands.
INFORMATION!
• All data given in the following tables are based on standard versions of the flow sensor only.
• Especially for smaller nominal sizes of the flow sensor, the signal converter can be bigger
than the sensor.
• Note that for other pressure ratings than mentioned, the dimensions may be different.
• For full information on signal converter dimensions see relevant documentation.