SI1004 - Flow sensor IFM - Free user manual and instructions

Product type	Analog flow sensor
Model	SI1004
Brand	IFM
Supply voltage	20...36 V DC (SELV/PELV)
Analog output	4...20 mA, max. ~23 mA
Max load on output	500 Ω
Flow range	3...60 cm/s (water)
Fluid temperature	-25...+80 °C
Ambient temperature	-25...+80 °C
Max operating pressure	300 bar
Protection rating	IP67 (IEC 60529)
Probe material	Stainless steel 316L (FPM O-ring)
Housing material	PBT-GF 20
Response time	1...10 s
Power-on delay	15 s (indicated optically)
Electrical connection	M12 connector (4-pin)
Mounting	On process adapter (adapter separate)
Min. distance upstream/downstream	5× pipe diameter upstream, 3× downstream
Probe installation depth	Min. 12 mm into the pipe
Settings	HI-Teach (max flow) and LO-Teach (min flow) via button
Display	10 green LED bar (flow), flashing for overrange
Lock function	Yes, via both buttons (10 s)
Maintenance	Clean probe with soft cloth; descaling possible
Repairability	Spare parts available (adapters, connectors)

Frequently Asked Questions - SI1004 IFM

How to set the sensor to maximum flow (HI-Teach)?

Ensure the fluid flow is at the desired maximum value. Press and hold the Learn/Set button for 5 to 10 seconds until the LED bar lights up from left to right, then release. The device saves the current flow as the maximum value (LED 9).

How to set the sensor to minimum flow (LO-Teach)?

After performing HI-Teach, set the flow to the desired minimum value (or stop the flow). Press and hold Learn/Set for 10 to 15 seconds until the bar lights up from right to left, then release. The device saves this flow as the minimum value (LED 0).

What to do if the LEDs flash red during setting?

A red flash indicates that setting is impossible (e.g., unstable flow). The device returns to operational mode without change. Check that the flow is stable and within the measuring range, then try again.

How to interpret the LED display in normal operation?

The green LEDs form a bar: each LED corresponds to 10% of the set flow range. LED 0 represents the minimum value (LO), LED 9 the maximum (HI). If LED 9 flashes, flow exceeds the scale; if LED 0 flashes, flow is below the minimum.

What is the output signal in case of excess flow?

In case of excess flow, LED 9 flashes and the output signal exceeds 20 mA. You can also configure a reduced scale (LED 5 to 8) to detect overranges more precisely. The output current depends on the selected LED (see table in manual).

How to reset the sensor to factory settings?

In Run mode, press and hold Learn/Set for 15 to 20 seconds: wait until the orange LED bar lights up from left to right, then release. All custom settings are cleared and factory values restored.

What mounting precautions should I observe?

Mount the sensor laterally on horizontal pipes, or on a rising section for vertical pipes. Maintain a minimum distance of 5 times the pipe diameter upstream and 3 times downstream from bends or valves. Grease the nut but not the probe tip. Do not screw the probe against the pipe wall.

What are the electrical and safety requirements?

Power supply 20...36 V DC, according to EN50178 (SELV/PELV). For UL 508, use a galvanically isolated power supply with overload protection. Connection must be made by a qualified electrician, de-energized.

How to maintain the sensor?

Periodically check the probe tip for deposits. Clean with a soft cloth. For stubborn deposits (limescale), use a common acetic acid product. Do not apply grease to the probe.

Which liquids can be measured and what are the limits?

The sensor is suitable for aqueous liquids primarily. Fluid temperature range: -25 to +80 °C. Max pressure: 300 bar. Measurable flow: 3 to 60 cm/s. Do not use with fluids aggressive to stainless steel 316L or FPM O-ring (check compatibility).

USER MANUAL SI1004 IFM

Operating instructions

Notice utilisateurs

LED = grün LED = orange LED rot

Brief adjustment instructions

Installation

Mounting page 22, electrical connection page 24.

HI-Teach

Apply the operating voltage.

After approx. 15s the unit is ready.

Allow the medium to flow through the system at the required maximum flow rate (HI).

Press the Learn/Set button and keep it pressed.

The green LEDs on the right and on the left flash, after 5s the LED bar (green) fills from left to right (release the button as soon as the first LEDs light).

The indication goes off briefly. The unit stores the current flow as maximum flow.

• The unit is ready for normal operation.

Further setting options ( page 25)

• The HI-Teach is sufficient for the majority of waterbased applications. Optional: adjustment to minimum flow (LO-Teach).
• Setting for monitoring and optical indication of excess flow.
• Reset to factory settings.

Further information

Function and features . page 21

Installation and set-up / Operation / Maintenance . . . . . . page 26

Technical data page 27

Controls and visual indication

Function display (Run mode)

current flow within the display range (LED bar green)

excess flow (LED 9 flashes)

underflow (LED 0 flashes)

Setting buttons

Mode / Enter: • selection of the menu items and acknowledgement

Learn/Set: • adjustment to maximum / minimum flow; • reset to factory settings • setting of values (scrolling by holding pressed;incremental by pressing briefly)

Menu structure

LED = green LED = orange LED = red

Function and features

The flow sensor

• detects the flow velocity in liquid media,
• converts it into an analog output signal (4 ... 20mA),

• and indicates the relative flow value within the adjustable detection range by means of LEDs:

• LED 0 = lower limit of the detection range (maximum value / LO)

• LED 9 = upper limit of the detection range (minimum value / HI)

It is also possible to indicate:

• Excess flow: LED 9 flashes if the flow is considerably higher (2 LEDs) than the display range; output current >20mA .
• Underflow / flow standstill: LED 0 flashes if the flow is lower than the display range.

The output signal corresponds to the characteristic curve of the sensor. Like the row of LEDs it indicates the relative flow velocity within the detection range set. Internally the signal change between LO and HI is divided into 10 parts and displayed by the row of 10 LEDs and the current output.

Installation

The unit is adaptable for various process fittings (adapters to be ordered separately as accessories).

• In the case of horizontal pipes mount the unit from the side, if possible (fig. 1).
  When the unit is to be mounted at the bottom of the pipe, it should be free from deposits.
  When the unit is to be mounted at the top of the pipe, it should be completely filled with the medium to be monitored.
• In the case of vertical pipes mount the unit in a place where the medium flows upwards (fig. 2).

To avoid malfunction a minimum distance between the flow monitor and bends, valves, changes in cross-section or such like must be observed:

• Min. 5 x pipe diameter upstream (A).
• Min. 3 × pipe diameter downstream (B).

1. Lubricate the nut (3) and all threads with grease to ensure the nut can be loosened and tightened several times.

Note: No grease must be applied to the sensor tip (A).

1. Screw the suitable adapter (2) onto the process fitting (1).
2. Insert the flow monitor into the adapter. While keeping the unit aligned tighten the nut (3); (max. tightening torque 50Nm).

Insertion depth of the sensor: min. 12mm in the pipe. When the adapters are used which are available as accessories, the correct depth is ensured.

Note: The sensor tip must not touch the pipe wall.

mounting dimension with M12 adapter	mounting dimension with G¼ adapter	mounting dimension with G½ adapter
13.5 27	13.5 27	21 35

Electrical connection

The unit must only be connected by an electrician.

The national and international regulations for the installation of electrical equipment must be observed.

Voltage supply to EN50178, SELV, PELV.

The device shall be supplied from an isolating source and protected by an overcurrent device such that the limited voltage circuit requirements in accordance with UL 508 are met.

Disconnect power before connecting the unit.

Wiring:

connector view (sensor)

Core colours of ifm sockets:

1 = BN(brown), 2 = WH(white) ,

3 = BU (blue), 4 = BK (black)

n.c. = not connected

When the supply voltage is applied, all LEDs light and go off one after the other. The unit is then ready for operation.

*During this time the output signal is 20mA.

If the operating voltage is too low, the output signal passes to 0mA .

Programming

Setting of the detection range HI-Teach

• Allow the medium to flow through the system at the required maximum flow rate.
• Press the Learn/Set button for >5 < 10s (= adjustment to maximum flow / upper limit of the detection range).

Optional: LO-Teach

The HI-Teach is sufficient for the majority of waterbased applications. Optional: adjustment to minimum flow.

• Allow the medium to flow through the system at the required minimum flow rate or bring flow to a standstill.
• Press the Learn/Set button for >10 < 15s (= adjustment to minimum flow or flow standstill / lower limit of the detection range).

Monitoring excess flow

• Press the Mode/Enter button once.
• Press the Learn/Set button for 5s, release the button when LED flashes.
• Press the Learn/Set button several times to shift the LED for the maximum display value.
• Press the Mode/Enter button briefly.

Reset to factory settings

• Press the Learn/Set button for >15 < 20s

The following applies to all setting procedures:

• If no button is pressed for 15s during the setting procedure, the unit returns to the operating mode with the parameter values unchanged.
• If adjustment has not been possible, all the red LEDs flash. The unit returns to the operating mode with the parameter values unchanged.

Locking / Unlocking

The unit can be electronically locked to prevent unwanted adjustment of the set parameters: Press both setting buttons for 10s (the unit must be in Run mode). Indication goes out briefly (acknowledgement of locking / unlocking).

Units are delivered from the factory in the unlocked state.

With the unit in the locked state indication goes out briefl when you press the Mode/Enter button.

Installation and set-up / Operation / Maintenance

When the supply voltage is applied, all LEDs light and go off one after the other. * The unit is then ready for operation.

*During this time the output signal is 20mA.

Check the sensor tip for build-up from time to time. Clean it with a soft cloth. If necessary, build-up which adheres firmly (e.g. lime) can be removed with a common vinegar cleansing agent.

Technical data

Operating voltage [V] 20 ... 36 DC¹⁾
Analog output [mA] 4 ... 20, max. approx. 23
Max. load [Ω] 500

Liquids

Medium temperature [^ C] -25 +80 Setting range [cm/s] 3 60

Response time [s] 1.10
Power-on delay time [s] 15, optically indicated
Pressure rating [bar]. 300
Operating temperature [^ C] -25 +80
Protection IP 67
Shock resistance [g]. 50 (DIN / IEC 68-2-27, 11 ms)
Vibration resistance [g] 20 (DIN / IEC 68-2-6, 55-2000 Hz)
Housing material IP 67 (IEC60529) / (UL50)
Sensor material (SI1004) stainless steel (316S12); O-ring: FPM 8x1.5 gr 80^ Shore A
Sensor material (SI1104) titanium; O-ring: FPM 8x1.5 gr 80^ Shore A

1)to EN50178, SELV, PELV; referring to UL: see page 24 (Electrical connection).

Programming diagrams / Technical information

Setting of the detection range

The detection range (window) is determined by:

• Adjustment to the required maximum flow (HI-Teach) = upper limit of the window. This setting is sufficient for the majority of waterbased applications.
• Adjustment to the required minimum flow / flow standstill (LO-Teach) = lower limit of the window.

- Adjustment to maximum flow (HI-Teach)

The unit detects the current flow and sets this value as the maximum value for the LED display (LED 9).

1	Apply the operating voltage. After approx. 15s the unit is ready. Allow the medium to flow through the system at the required maximum flow rate.
2	M S >5...<10s	LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI → LO HI →
		Press the Learn/Set button and keep it pressed. The green LEDs on the right and on the left flash, after 5s the LED bar (green) fills from left to right (release the button as soon as the first LEDs light). The indication goes off briefly. The unit stores the current flow as maximum flow and passes into the operating mode.

- Adjustment to minimum flow / flow standstill (LO-Teach), optional

The unit detects the current flow and sets this value as the minimum display value for the LED display. In normal operation the first green LED (LED 0) flashes when the flow falls below this value (or when it comes to a standstill).

NOTE: The LO-Teach operation may only be carried out after the HI-Teach operation.

1	Allow the medium to flow through the system at the required minimum flow rate or bring to a standstill.
2	M S >10...<15s	LO HI ↓ LO HI U U LO HI U U after 5s the LED bar (green) fills from left to right
	M S	after a further 5s the LED bar (gren) fills from right to left (release the button as soon as the first LEDs on the right light).
	X	The indication goes off briefly. The unit stores the current flow as minimum flow and passes into the operating mode.

Monitoring excess flow

With this function the position of the display window within the detection range can be defined: Shift the LED for the maximum display value to position 8, 7, 6 or 5. In the case of maximum flow all LEDs from 0 up to this LED are lit. The LEDs above the range signal excess flow. If the switch point is above this range, the unit switches in the case of excess flow.

The output signal indicates the maximum flow and excess flow. The output current for maximum flow/excess flow depends on the position to which the LED for the maximum display value has been shifted.

LED for maximum value	output signal for maximum flow [mA]	output signal for excess flow [mA]
LED 5	12.0 ... 13.6 13.6	. 20
LED 6	13.6 ... 15.2 15.2	. 20
LED 7	15.2 ... 16.8 16.8	. 20
LED 8 18.4 ... 20	16.8 ... 18.4

Setting:

1	1 x	LO HI →	Press the Mode/Enter button once. The current setting is indicat-ed (green LED).
2	5 s	LO HI →	Press the Learn/Set button for 5s (until LED flashes).
3	M S	LOHL →	Press the Learn/Set button several times until the requested LED flashes (LED 8, 7, 6 or 5). Each time the button is pressed the LED moves back by one position. When it is lower than LED 5 the cycle starts again at LED 9.
4	M S	LOHI →	Press the Mode/Enter button briefly (acknowledgement). The indication goes off briefly. The unit stores the new setting and passes into the run mode.

Please note:
The display value is reset (to LED 9) after each maximum flow rate adjustment (HI-Teach).

■ Return to factory setting

Press the Learn/Set button and keep it pressed.

The green LEDs on the right and on the left flash,

after 5s the LED bar (green) fills from left to right,

after a further 5s the LED bar (green) fills from right to left,

after a further 5s the LED bar (orange) fills from left to right (release the button as soon as the first orange LEDs light).

The indication goes off briefly. All settings are returned to factory setting and the unit passes into the run mode flow.

LED = verte LED = orange LED rouge

1	Mettre l'appareil sous tension. L'appareil est opérationnel après env. 15s. Le débit du fluide doit être à la valeur maximale souhaité et constant.
2	M S >5...<10s	LO HI → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO HL → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LOH → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO L → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO H → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I → LO I