Krohne IFC 300 Signal Converter for Electromagnetic Flowmeters
DEVICE DESCRIPTION
Scope of delivery
INFORMATION!
Inspect the cartons carefully for damage or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer.
INFORMATION!
Check the packing list to see if you received completely all that you ordered.
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.
- Device in the version as ordered
- Documentation (calibration report, Quick Start, CD-ROM with product documentation for measuring sensor and signal converter)
- Signal cable (only for the remote version)
Device description
Electromagnetic flowmeters are designed exclusively to measure the flow and conductivity of electrically conductive liquid media.
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 versions are available:
- Compact version (the signal converter is mounted directly on the measuring sensor)
- Remote version (electrical connection to the measuring sensor via field current and signal cable)
- Compact version
- Measuring sensor with a connection box
- Field housing
- Wall-mounted housing
- 19″ rack-mounted housing
Field housing
- Cover for electronics and display
- Cover for the power supply and the input/output terminal compartment
- Cover for measuring sensor terminal compartment with locking screw
- Cable entry for measuring sensor signal cable
- Cable entry for measuring sensor field current cable
- Cable entry for power supply
- Cable entry for inputs and outputs
- Mounting plate for pipe and wall mounting
INFORMATION!
Each time a housing cover is opened, the thread should be cleaned and greased. Use only resin-free and acid-free grease.
Ensure that the housing gasket is properly fitted, clean, and undamaged.
Wall-mounted housing
- Cover for terminal compartments
- Terminal compartment for measuring sensor
- Terminal compartment for inputs and outputs
- Terminal compartment for power supply with safety cover (shock-hazard protection)
- Cable entry for signal cable
- Cable entry for field current cable
- Cable entry for inputs and outputs
- Cable entry for power supply
Turn the lock to the right and open the cover.
Nameplates
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.
Compact version (example)
- Approvals-related information: Ex approval, EC type test certificate, hygienic approvals, etc.
- Approvals-related thresholds
- Approvals-related connection data of the inputs/outputs; Vm = max. power supply
- Approvals-related data (e.g., accuracy class, measuring range, temperature thresholds, pressure thresholds, and viscosity thresholds)
- Approvals-related pressure and temperature thresholds
- Power supply, protection category; materials of wetted parts
- GK/GKL values (measuring sensor constants); size (mm /inches); field frequency
- Product designation, serial number, and manufacturing date
Remote version (example)
- Manufacturer
- Product designation, serial number, and manufacturing date
- GK/GKL values (measuring sensor constants), size (mm /inches), field frequency
- Power supply
- Materials of wetted parts
- Field coil resistance
- Approvals-related data (e.g., accuracy class, measuring range, temperature thresholds, pressure thresholds, and viscosity thresholds)
Electrical connection data of inputs/outputs (example of basic version)
- Power supply (AC: L and N; DC: L+ and L-; PE for ≥ 24 VAC; FE for ≤ 24 VAC and DC)
- Connection data of connection terminal D/D-
- Connection data of connection terminal C/C-
- Connection data of connection terminal B/B-
- Connection data of connection terminal A/A-; A+ only operable in the basic version
- A = active mode; the signal converter supplies the power for the connection of the subsequent devices
- P = passive mode; external power supply required for operation of the subsequent devices
- N/C = connection terminals not connected
INSTALLATION
Notes on installation
INFORMATION!
Inspect the cartons carefully for damage or signs of rough handling. Report damage to the carrier and to the local office of the manufacturer.
INFORMATION!
Check the packing list to see if you received completely all that you ordered.
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.
Storage
- Store the device in a dry, dust-free location.
- Avoid continuous direct sunlight.
- Store the device in its original packaging.
- Storage temperature: -50…+70°C / -58…+158°F
Transport
Signal converter
No special requirements.
Compact version
- Do not lift the device by the signal converter housing.
- Do not use lifting chains.
- To transport flange devices, use lifting straps. Wrap these around both process connections.
Installation specifications
INFORMATION!
The following precautions must be taken to ensure a reliable installation.
- Make sure that there is adequate space on the sides.
- Protect the signal converter from direct sunlight and install a sunshade if necessary.
- Signal converters installed in control cabinets require adequate cooling, e.g., by a fan or heat exchanger.
- Do not expose the signal converter to intense vibration. The flowmeters are tested for a vibration level in accordance with IEC 68-2-3.
Mounting of the compact version
INFORMATION!
The signal converter is mounted directly on the measuring sensor. For installation of the flowmeter, please observe the instructions in the supplied product documentation for the measuring sensor.
Mounting the field housing, remote version
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.
Pipe mounting
- Fix the signal converter to the pipe.
- Fasten the signal using standard U-bolts and washers.
- Tighten the nuts.
Wall mounting
- Prepare the holes with the aid of the mounting plate. For further information, refer to the Mounting plate, field housing on page 134.
- Use the mounting material and tools in compliance with the applicable occupational health and safety directives.
- Fasten the housing securely to the wall.
Turning on the display of the field housing version
The display of the field housing version can be turned in 90° increments.
- Unscrew the cover from the display and the operation control unit.
- Using a suitable tool, pull out the two metal puller devices to the left and right of the display.
- Pull out the display between the two metal puller devices and rotate it to the required position.
- Slide the display and then the metal puller devices back into the housing.
- Re-fit the cover and tighten it by hand.
CAUTION!
The ribbon cable of the display must not be folded or twisted repeatedly.
INFORMATION!
Each time a housing cover is opened, the thread should be cleaned and greased. Use only resin-free and acid-free grease.
Ensure that the housing gasket is properly fitted, clean, and undamaged.
Mounting the wall-mounted housing, remote version
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.
Pipe mounting
- Fasten the mounting plate to the pipe with standard U-bolts, washers, and fastening nuts.
- Screw the signal converter to the mounting plate with the nuts and washers.
Wall mounting
- Prepare the holes with the aid of the mounting plate. For further information, refer to Mounting plate, wall-mounted housing on page 134.
- Fasten the mounting plate securely to the wall.
- Screw the signal converter to the mounting plate with the nuts and washers.
ELECTRICAL CONNECTIONS
Safety instructions
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!
Observe the national regulations for electrical installations!
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.
Important notes on electrical connection
DANGER!
Electrical connection is carried out in conformity with the VDE 0100 directive “Regulations for electrical power installations with line voltages up to 1000 V” or equivalent national regulations.
CAUTION!
- Use suitable cable entries for the various electrical cables.
- The measuring sensor and signal converter have been configured together at the factory. The devices should therefore be installed in pairs. Make sure that the measuring sensor constants GK/GKL have identical settings (see nameplates).
- In the event of separate delivery or the installation of devices that have not been configured together, the signal converter must be set to the DN size and GK/GKL of the measuring sensor, as referenced in the Function tables on page 91.
Electrical cables for remote device versions, notes
Notes on signal cables A and B
INFORMATION!
The signal cables A (type DS 300) with double shield and B (type BTS 300) with triple shield ensure proper transmission of measured values.
Observe the following notes:
- Lay the signal cable with fastening elements.
- It is permissible to lay the signal cable in water or in the ground.
- The insulating material is flame-retardant to EN 50625-2-1, IEC 60322-1.
- The signal cable does not contain any halogens and is unplasticized, and remains flexible at low temperatures.
- The connection of the inner shield is carried out via the stranded drain wire (1).
- The connection of the outer shield is carried out via the shield (60) or the stranded drain wire (6), depending on the housing version. Observe the following notes.
Notes on field current cable C
DANGER!
A non-shielded three-wire copper cable is sufficient for the field current cable. If you nevertheless use shielded cables, the shield must NOT be connected in the housing of the signal converter.
INFORMATION!
The field current cable is not part of the scope of supply.
Requirements for signal cables provided by the customer
INFORMATION!
If the signal cable was not ordered, it is to be provided by the customer. The following requirements regarding the electrical values of the signal cable must be observed:
Electrical safety
To EN 60811 (Low Voltage Directive) or equivalent national regulations.
Capacitance of the insulated conductors
- Insulated conductor / insulated conductor < 50 pF/m
- Insulated conductor/shield < 150 pF/m
Insulation resistance
- Riso > 100 GΩ x km
- Umax < 24 V
- Imax < 100 mA
Test voltages
- Insulated conductor / inner shield 500 V
- Insulated conductor / insulated conductor 1000 V
- Insulated conductor / outer shield 1000 V
Twisting of the insulated conductors
- At least 10 twists per meter, important for screening magnetic fields.
Preparing the signal and field current cables
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.
The electrical connection of the outer shield is different for the various housing variants. Please observe the corresponding instructions.
Signal cable A (type DS 300), construction
- Signal cable A is a double-shielded cable for signal transmission between the measuring sensor and signal converter.
- Bending radius: ≥ 50 mm / 2″
- Stranded drain wire (1) for the inner shield (10), 1.0 mm2 Cu / AWG 17 (not insulated, bare)
- Insulated wire (2), 0.5 mm2 Cu / AWG 20
- Insulated wire (3), 0.5 mm2 Cu / AWG 20
- Outer sheath
- Insulation layers
- Stranded drain wire (6) for the outer shield (60)
Preparing signal cable A, connection to the signal converter
Field housing
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.
- The outside shield (60) is connected in the field housing directly via the shield and a clip.
- Bending radius: ≥ 50 mm / 2″
Required materials:
- PVC insulation tubing, Ø2.5 mm / 0.1″
- Heat-shrinkable tubing
- Wire end ferrule to DIN 46 228: E 1.5-8 for the stranded drain wire (1)
- 2x wire end ferrules to DIN 46 228: E 0.5-8 for the insulated conductors (2, 3)
- a = 80 mm / 3.15″
- b = 10 mm / 0.39″
- Strip the conductor to dimension a. Trim the outer shield to dimension b and pull it over the outer sheath.
- Cut off the inner shield (10) and the stranded drain wire (6). Make sure not to damage the stranded drain wire (1).
- Slide an insulating tube over the stranded drain wire (1).
- Crimp the wire end ferrules onto the conductors (2, 3) and stranded drain wire.
- Pull the heat-shrinkable tubing over the prepared signal cable.
Wall-mounted housing
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.
- The connection of the outer shield (60) is carried out in the wall-mounted housing via the stranded drain wire (6).
- Bending radius: ≥ 50 mm / 2″
Required materials
- Push-on connector 6.3 mm / 0.25″, insulation to DIN 46245 for conductor Ø = 0.5…1 mm2 / AWG 20…17
- PVC insulation tubing, Ø2.5 mm / 0.1″
- Heat-shrinkable tubing
- Wire end ferrule to DIN 46 228: E 1.5-8 for the stranded drain wire (1)
- 2x wire end ferrules to DIN 46 228: E 0.5-8 for the insulated conductors (2, 3)
a = 80 mm / 3.15″
- Strip the conductor to dimension a.
- Cut off the inner shield (10) and the outer shield (60). Make sure not to damage the stranded drain wires (1) and (6).
- Slide the insulation tubing over the stranded drain wires.
- Crimp the push-on connector onto the stranded drain wire (6).
- Crimp the wire end ferrules onto the conductors (2, 3) and stranded drain wire (1).
- Pull the heat-shrinkable tubing over the prepared signal cable.
Description of the inputs and outputs
Current output
INFORMATION!
The current outputs must be connected depending on the version! Which I/O versions and inputs/outputs installed in your signal converter are indicated on the sticker in the cover of the terminal compartment.
- All outputs are electrically isolated from each other and from all other circuits.
- All operating data and functions can be adjusted.
- Passive mode: external power Uext ≤ 32 VDC at I ≤ 22 mA
- Active mode: load impedance RL ≤ 1 kΩ at I ≤ 22 mA; RL ≤ 450 Ω at I ≤ 22 mA for Ex i outputs
- Self-monitoring: interruption or load impedance is too high in the current output loop
- An error message is possible via status output, error indication on LCD display.
- Current value error detection can be adjusted.
- Automatic range conversion via threshold or control input. The setting range for the threshold is between 5 and 80% of Q100%, ± 0…5% hysteresis (corresponding ratio from smaller to larger range of 1:20 to 1:1.25).. Signaling of the active range is possible via a status output (adjustable).
- Forward / reverse flow measurement (F/R mode) is possible.
DANGER!
For devices used in hazardous areas, additional safety notes apply; please refer to the Ex documentation
Status output and limit switch
INFORMATION!
Depending on the version, the status outputs and limit switches must be connected passively or actively, or according to NAMUR EN 60947-5-6! Which I/O version and inputs/outputs installed in your signal converter are indicated on the sticker in the cover of the terminal compartment.
- The status outputs/limit switches are electrically isolated from each other and from all other circuits.
- In simple active or passive mode, the output stages of the status outputs/limit switches behave like relay contacts, and could be connected with whatever polarity is required.
- All operating data and functions can be adjusted.
- Passive mode: external power supply required: Uext ≤ 32 VDC; I ≤ 100 mA
- Active mode: use of the internal power: Unom 24 VDC; I ≤ 200 mA
- NAMUR mode: passive in accordance with EN 60947-5-6
- For information on the adjustable operating states, refer to the Function tables on page 91.
Control input
INFORMATION!
Depending on the version, the control inputs must be connected passively or actively or according to NAMUR EN 60947-5-6! Which I/O version and inputs/outputs installed in your signal converter are indicated on the sticker in the cover of the terminal compartment.
- All control inputs are electrically isolated from each other and from all other circuits.
- All operating data and functions can be adjusted.
- Passive mode: external power supply required: Uext ≤ 32 VDC
- Active mode: use of the internal power supply: Unom 24 VDC
- NAMUR mode: in accordance with EN 60947-5-6 (Active control input to NAMUR EN 60947-5-6: signal converter monitors cable breaks and short circuits acc. to EN 60947-5-6. Errors indicated on LCD display. Error messages possible via status output.)
- For information on the adjustable operating states, refer to the Function tables on page 91.
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Krohne IFC 300 Signal Converter for Electromagnetic Flowmeters-FAQs
What is the working principle of the Krohne electromagnetic flowmeter?
Krohne electromagnetic flowmeters operate based on Faraday’s Law of Induction. When a conductive fluid flows through a magnetic field, a voltage is induced between two electrodes, proportional to the flow velocity.
Is the IFC 300 an open standard?
Yes, IFC (Industry Foundation Classes) is an open ISO-certified standard, allowing compatibility across various hardware and software platforms.
How does an electromagnetic flowmeter work?
It measures flow by detecting voltage generated when a conductive liquid passes through a magnetic field. The voltage is proportional to the flow rate.
What types of fluids can Krohne electromagnetic flowmeters measure?
They measure conductive liquids (e.g., water, chemicals, wastewater) but cannot measure non-conductive fluids like oils, pure water, or gases.
What is the typical flow velocity range for an electromagnetic flowmeter?
Most models measure flow velocities between 0.3 to 10 m/s, depending on pipe size.
How do you calibrate an electromagnetic flowmeter?
Wet calibration (most accurate): Pass a known fluid volume through the meter and compare readings.
Field verification: Check electrode signals and magnetic field strength.
What are the disadvantages of electromagnetic flowmeters?
Cannot measure non-conductive fluids.
Requires minimum liquid conductivity (5 µS/cm).
Needs full pipe conditions for accuracy.
What is the turndown ratio of Krohne ultrasonic flowmeters?
Krohne’s OPTISONIC 7300 ultrasonic flowmeter has a turndown ratio of 100:1, suitable for wide flow ranges.
What is the minimum pipe straight length required for installation?
Upstream: 10x pipe diameter (10D).
Downstream: 5x pipe diameter (5D).
How do you maintain a magnetic flowmeter?
Clean electrodes regularly to prevent buildup.
Verify grounding to avoid signal interference.
Perform periodic calibration checks.