IFM SI5012 User manual

Operating instructions
Flow monitor
SI5012
11458840 / 0005 / 2022
GB

SI5012 Flow monitor
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Contents
1 Preliminary note ............................................................. 3
1.1 Symbols used.......................................................... 3
1.2 Warnings used ......................................................... 3
2 Safety instructions............................................................ 4
3 Intended use................................................................ 5
4 Function ................................................................... 6
5 Installation.................................................................. 7
5.1 Installation position...................................................... 7
5.1.1 Immersion depth.................................................... 7
5.1.2 Recommended mounting position....................................... 7
5.1.3 Conditionally possible installation position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1.4 Impermissible installation position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2 Interference............................................................ 8
5.3 Process connection...................................................... 8
6 Electrical connection.......................................................... 10
7 Operating and display elements................................................. 11
8 Set-up..................................................................... 12
9 Settings.................................................................... 13
9.1 Changing the switch point................................................. 13
9.2 High-flow adjustment..................................................... 13
9.3 Low-flow adjustment..................................................... 13
9.4 Changing the switching logic............................................... 14
9.5 Restoring factory settings (reset)............................................ 14
9.6 Lock / unlock........................................................... 14
9.7 Remote calibration ...................................................... 14
10 Operation .................................................................. 15
11 Troubleshooting ............................................................. 16
12 Maintenance, repair and disposal................................................ 17

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1 Preliminary note
You will find instructions, technical data, approvals and further information using the QR code on the
unit / packaging or at www.ifm.com.
1.1 Symbols used
Requirement
Instructions
Reaction, result
[...] Designation of keys, buttons or indications
Cross-reference
Important note
Non-compliance may result in malfunction or interference.
Information
Supplementary note
1.2 Warnings used
CAUTION
Warning of personal injury
wSlight reversible injuries may result.

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2 Safety instructions
• The unit described is a subcomponent for integration into a system.
– The system architect is responsible for the safety of the system.
– The system architect undertakes to perform a risk assessment and to create documentation in
accordance with legal and normative requirements to be provided to the operator and user of
the system. This documentation must contain all necessary information and safety instructions
for the operator, the user and, if applicable, for any service personnel authorised by the
architect of the system.
• Read this document before setting up the product and keep it during the entire service life.
• The product must be suitable for the corresponding applications and environmental conditions
without any restrictions.
• Only use the product for its intended purpose (Ò Intended use).
• Only use the product for permissible media.
• If the operating instructions or the technical data are not adhered to, personal injury and/or damage
to property may occur.
• The manufacturer assumes no liability or warranty for any consequences caused by tampering with
the product or incorrect use by the operator.
• Installation, electrical connection, set-up, operation and maintenance of the product must be
carried out by qualified personnel authorised by the machine operator.
• Protect units and cables against damage.

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3 Intended use
The device monitors liquids and gases.

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4 Function
The device detects flow based on the calorimetric measuring principle and switches the output.
For the factory setting the switch point is at LED 7 and the device is set to normally open. The output
can be switched to normally closed function. The switch point LED indicates the switching status:
orange = output closed; red = output open.
With normal flow, the output has the following status:
• output closed for normally open function
• output open for normally closed function.
Fig.1: Flow ≥ SP / normally open function Fig.2: Flow ≥ SP / normally closed function
If the flow velocity decreases, the switching status changes when the value falls below the switch point
SP minus the hysteresis.
Fig.3: Flow < SP / normally open function Fig.4: Flow < SP / normally closed function
The hysteresis changes with the flow velocity and it is essentially influenced by the set
monitoring range. It is 2...5 cm/s for the setting 5...100 cm/s (= factory setting), it increases with
higher flow velocities.
The typical response time of the device is 1 ... 10 s. It can be influenced by the setting of the switch
point:
• Low switch point = quick reaction with rising flow.
• High switch point = quick reaction with falling flow.
See: Changing the switch point (Ò/13).

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5 Installation
CAUTION
During installation or in case of mechanical failure, high pressure or hot media can leak
from the system.
wRisk of injury caused by pressure or burns.
uEnsure that the system is free of pressure during installation.
uEnsure that no media can leak at the mounting location during installation.
5.1 Installation position
5.1.1 Immersion depth
≥12 mm
Fig.5: Immersion depth
• The sensor tip must be completely surrounded by the medium.
• Recommended immersion depths: minimum 12 mm.
5.1.2 Recommended mounting position
Fig.6: Recommended mounting position
• For horizontal pipes: mounting from the side.
• For vertical pipes: mounting in the rising pipe.
5.1.3 Conditionally possible installation position
Fig.7: Conditionally possible installation position
• For horizontal pipes, if the pipe is free from build-up: mounting from below.
• For horizontal pipes, if the pipe is completely filled with medium: mounting from the top.

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5.1.4 Impermissible installation position
Fig.8: Impermissible installation position
• The sensor tip must not be in contact with the pipe wall.
• Do not mount in downpipes that are open at the bottom.
5.2 Interference
Structures in the pipe, bends, valves, reducing pieces and the like affect the function of the unit.
uAdhere to the distances between sensor and interference.
S
5...10 x D
S
3...5 x D
Fig.9: Inlet and outlet pipe lengths
D: Outside diameter of the pipe
S: Interference
5.3 Process connection
Using process adapters the unit can be adapted to different process connections.
A correct fit of the unit and ingress resistance of the connection are only ensured using ifm adapters.
For small flow rates, ifm adapter blocks are available.
The device is supplied without accessories.
Information about available accessories at documentation.ifm.com.
The optimum function is not ensured when using components from other manufacturers.
2 4
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Fig.10: Connect the device to the process using the adapter
1: Process connection 2: Adapter
3: Sensor tip 4: Coupling nut
uGrease the threads of the process connection, adapter and sensor. Use a lubricating paste which
is suitable and approved for the application.
Ensure no grease is applied to the sensor tip.
uScrew the suitable adapter into the process connection.

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uPlace the flow monitor onto the adapter and tighten the nut. Tightening torque 25 Nm. Ensure that
the unit is correctly oriented.

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6 Electrical connection
The unit must be connected by a qualified electrician.
Observe the national and international regulations for the installation of electrical equipment.
Voltage supply according to SELV, PELV.
uDisconnect power.
uConnect the unit as follows:
43
2 1
L
1 BN
2 WH
4 BK
3 BU
OUT
IN
L+
Fig.11: Wiring diagram
1: Ub+ 2: Programming wire for remote setting
3: Ub- 4: OUT (PNP): switching signal for flow monitoring
Only use 4-wire sockets without bridge between pin 2 and pin 4.
If 3-wire sockets with a bridge between pin 2 and pin 4 are used, power on of the output stage
triggers the remote calibration.

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7 Operating and display elements
2
1
Flow
Low High
1: Operation indication
• The LEDs 0...9 represent the range between flow standstill and maximum flow.
• The green LEDs show the current flow.
• An illuminated LED shows the position of the switch point:
– orange: output closed
– red: output open
In the current example: normally open function (factory setting).
2: Setting buttons for adjustment and configuration

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8 Set-up
uSwitch on the supply voltage.
wAll LEDs light and go out again step by step. During this time, the output is closed if set to
normally open and open if set to normally closed.
wThe device is in the operating mode.
uLet the normal flow circulate in the installation.
uCheck the display and determine further actions:
Display Explanation
1 The factory setting is suitable for the application.
No further settings are required.
2 Your normal flow is below the representation range of the display.
2 setting options:
uChanging the switch point (Ò/13)
uHigh-flow adjustment (Ò/13)
3 Your normal flow exceeds the representation range of the display (LED 9 flashes).
uHigh-flow adjustment (Ò/13)
Tab.1: Display for factory setting (normally open function, switch point at LED 7)
LED orange: output closed; LED red: output open
The factory settings can be restored at any time.
For media other than water:
uCarry out additional adjustment to the minimum flow: Low-flow adjustment (Ò/13).

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9 Settings
9.1 Changing the switch point
For the factory setting the switch point is at LED 7. A change makes sense in the following cases:
• The normal flow falls below the representation range of the display, see (Ò Set-up/12).
• The flow fluctuates strongly or pulsates.
• A faster response time of the device is required.
– Low switch point = quick reaction with rising flow.
– High switch point = quick reaction with falling flow.
uBriefly press [<] or [►].
wThe switch point LED flashes.
uPress [<] or [►] as often as required.
wEach press of the pushbutton shifts the LED by one position in the indicated direction.
uWhen the required switch point is reached, do not press the button for more than 2 seconds.
wThe device goes into operating mode with the newly set value.
9.2 High-flow adjustment
The switch point can be set to the current flow value (flow adjustment).
uLet the normal flow circulate in the installation.
uPress [►] and keep it pressed.
wLED 9 is on, after approx. 5 seconds it flashes.
uRelease [►].
wThe device is adapted to the flow conditions. It goes into operating mode.
wThe display should now show an LED indication similar to example 1, see (Ò Set-up/12).
The adjustment affects the switch point: It is increased proportionally (maximum up to LED 7).
9.3 Low-flow adjustment
If the device is used in media other than water, the device should additionally be adapted to the
minimum flow.
uCarry out the high-flow adjustment before the low-flow adjustment.
uLet the minimum flow circulate in the installation or ensure flow standstill.
uPress [<] and keep it pressed.
wLED 0 is on, after approx. 5 seconds it flashes.
uRelease [<].
wThe device adopts the new value and returns to the operating mode.

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9.4 Changing the switching logic
Upon delivery, the device is set to normally open.
Changeover to normally closed function:
uPress [<] for at least 15 seconds.
wLED 0 is on, after approx. 5 seconds it flashes.
wAfter 10 seconds the current setting is displayed: LEDs 5...9 light orange (= output normally
open).
wAfter approx. 15 seconds LEDs 0...4 flash orange.
uRelease [<].
wThe output is changed to normally closed function.
For a new changeover: repeat the operation.
9.5 Restoring factory settings (reset)
uPress [►] for at least 15 seconds.
wLED 9 is on, after approx. 5 seconds it flashes.
wAfter approx. 15 seconds LEDs 0...4 flash orange.
uRelease [►].
wAll settings are reset to the factory setting:
• operating range: 5 ...100 cm/s for water
• switch point: LED 7
• output function: normally open
• not locked
9.6 Lock / unlock
The unit can be locked electronically to prevent unauthorised setting.
Factory setting: not locked.
uPress both setting keys for 10 seconds.
wThe display goes off.
wThe unit is locked.
uFor unlocking repeat the process.
9.7 Remote calibration
The device can be adapted to new flow conditions at any time using the remote setting function.
The relative switch point is not shifted.
High-flow adjustment:
uApply Ub+ to pin 2 for 5 to 10 seconds.
Low-flow adjustment:
uApply Ub+ to pin 2 for 10 to 15 seconds.

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10 Operation
After every power on all LEDs light and go out again step by step. During this time, the output is
closed if set to normally open and open if set to normally closed. Then the device is ready for
operation.
The device detects the flow and switches the output according to the setting.
The device displays the current flow and the switching status.
In case of power failure or interruption of the operating voltage, all settings remain.
Display Explanation
1
LED 0 flashes
Current flow below the display range.
2
Current flow within the display range.
3 Current flow corresponds to the switch point.
4 Current flow above the switch point.
5
LED 9 flashes
Current flow above the display range.
Tab.2: Display for normally open function, switch point at LED 4
LED orange: output closed; LED red: output open

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11 Troubleshooting
Display Description Corrective measures
LEDs go off briefly when a button is
pressed.
After approx. 0.6 seconds, the last oper-
ating status is indicated.
The device is permanently locked. uUnlock device.
LEDs are permanently off.
Operating voltage too low (< 19 V) or
failed.
uEnsure correct voltage supply.
Operating indicator and red LEDs light
alternately.
Short circuit at the switching output. uRemove short circuit.
wThe device immediately returns to the
normal operating status and the
current operating indication appears
in the display.
LEDs flash red.
The device then returns to the operating
mode with unchanged values.
High-flow adjustment or low-flow adjust-
ment not successful.
uCheck whether all installation
requirements have been met.
uIncrease the distance between
maximum flow and minimum flow and
carry out the adjustment again.
uCarry out the two adjustment
operations again in the right
sequence.

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12 Maintenance, repair and disposal
Only the manufacturer is allowed to repair the unit.
uEnsure that the sensor tip is free from build-up:
• Check the sensor tip for build-up one month after set-up.
• Repeat check regularly. Determine check intervals based on the application.
• In case of soiling clean the sensor tip with a soft cloth. Stubborn build-up, such as lime, can be
removed using a common vinegar cleaning agent.
uAfter use dispose of the device in an environmentally friendly way in accordance with the
applicable national regulations.