SU0502 - Flow sensor IFM - Free user manual and instructions

Product type	Ultrasonic flow sensor
Brand	IFM
Model	SU0502
Measurement range (flow)	0.0 ... 40.0 L/min (display up to 48.0 L/min)
Display units	L/min, GAL/min, L/h, GPH, m³/h
Supply voltage	20 ... 28 V DC
Switching outputs	2 PNP or NPN outputs (configurable), short-circuit protected
Analog output (output 2)	4 ... 20 mA or 0 ... 10 V (configurable)
Switching functions	Hysteresis (NO/NC), window function (NO/NC)
Display	Digital, 3 digits, backlit, can be deactivated
Fluid temperature	+5 ... +80 °C
Ambient temperature	+10 ... +60 °C
Maximum pressure	16 bar
Measurement error	< ±3% of the measured value
Response time	1 ... 3 s
Availability delay	Approx. 10 s
Adjustable start-up delay	0 ... 50 s
Protection class	IP65 / III
Materials in contact with fluid	Bronze, V4A, PPR, EPDM, PES, CuZn39Pb3, Centellen 200
Housing material	CuZn39Pb3, ABS, PA
Process connection	G½ (thread)
Electrical connection	M12 connector, 4-pin
Installation	In-line, observe flow direction, straight distance min. 5× pipe diameter
Programming	Via two buttons (Mode/Enter and Set)
Additional functions	Customer calibration (CGA), max/min flow memory, start-up delay, locking

Frequently Asked Questions - SU0502 IFM

How to set the high set point (SP) and low set point (rP)?

Press Mode/Enter until SP1 or SP2 is displayed, then hold Set to change the value. Confirm with Mode/Enter. Then set rP in the same way.

What does the display 'OL' mean?

The display OL indicates excessive flow, greater than 120% of the final value of the measuring range. Reduce the flow or adjust the measuring range.

How to change the display unit?

In the EF menu, select the parameter Uni. You can choose from L/min, GAL/min, L/h, GPH or m³/h. Confirm with Mode/Enter.

How to perform a customer-specific calibration (CGA)?

Ensure the current flow is >25% of the final value. In the EF menu, select CGA. Hold Set to adjust the displayed value to the actual value, then confirm with Mode/Enter.

How to lock the sensor to prevent accidental modification?

In Run mode, press both buttons (Mode/Enter and Set) simultaneously for 10 seconds. The display turns off briefly. To unlock, repeat the operation.

What does the flashing 'SC1' or 'SC2' mean?

This indicates a short circuit on switching output 1 or 2. Check the wiring and load condition. If both outputs are short-circuited, 'SC' is displayed.

How to clear the max/min flow memory (HI/LO)?

In the EF menu, select HI or LO. Hold Set until '---' appears, then briefly press Mode/Enter.

What minimum distance to maintain before and after the sensor during installation?

To avoid turbulence, leave a straight distance of at least 5 times the pipe diameter (5×D) on each side of the sensor.

How to configure the analog output (4-20 mA or 0-10 V)?

Set the parameter OU2 to 'I' for 4-20 mA or 'U' for 0-10 V. Then define ASP (min value) and AEP (max value) of the measuring range.

What to do if the display remains off in Run mode?

Check the parameter d15 in the EF menu. If it is set to 'OFF', the display is disabled. Press a button to reactivate it temporarily, or set d15 back to 'd3' for permanent display.

USER MANUAL SU0502 IFM

Ultrasonics flow rate sensor

SP1 SP2 Mode/Enter Set

graph TD
    A["Mode/Enter"] --> B["Set"]
    B --> C["SP1"]

Werte bestätigen Acknowledgement of values Confirmer la valeur

Then the cycle starts again at the minimum setting value.

Select the display unit before setting the switch points (SPx, rPx) or the limits for the analog output signal (ASP, AEP). This avoids rounding errors generated internally during the conversion of the units and enables exact setting of the values.

① ② ③ ④ ⑤ ⑥ ⑦ ⑧ SP1 SP2 Mode/Enter Set

A SP1 SP2 Switch Current A A

Schritt 2

1 = BN (braun), 2 = WH (weiß), 3 = BU (blau), 4 = BK (schwarz)

Programmieren

Fensterfunktion

Controls and visual indication

① ② ③ ④ ⑤ ⑥ ⑦ ⑧ SP1 SP2 Mode/Enter Set

1	process connection G 12 / downstream
2	M12 connector
3	7-segment display	display of the current flow velocity ^1) ,display of parameters and parameter values
4	Calibration indicator	LED lights if customer-specific calibrationhas been carried out
5	2 x LED yellow	switching status; lights if output I / II has switched
6	Set button	setting of the parameter values(scrolling by holding pressed;incremental by pressing briefly)
7	Mode / Enter button	selection of the parametersand acknowledgement of the parameter values
8	process connection G 12 / upstream

^1) LPH (litre/hour) value = displayed value ×10

Function and features

The flow monitor detects the flow rate of water,

• shows the current flow rate on its display, (max. value displayed: final value of measuring range + 20%)
- and generates 2 output signals according to the set output configuration.

	Output 1 Output 2
Analog output(only output 2)		4 ... 20mA (I)
		0 ... 10V (U)
switching function(output 1 and output 2;function can be selected for each output separately)	hysteresis function / N.O. (Hno)
	hysteresis function / N.C. (Hnc)
	window function / N.O. (Fno)
	window function / N.C. (Fnc)
output polarity (applies to both switching outputs)	p-switching (PnP)
	n-switching (nPn)

Monitoring of cooling waterApplication

Measuring and display range

		measuring range display range
litre/min. 0.0 ... 40.0	L, E		0.0 ... 48.0
gallons/min.	GAL	0.0 ... 10.6	0.0 ... 12.7
litre/hour^1)	LPH	0 ... 2400	0 ... 2880
gallons/hour	GPH	0 ... 632	0 ... 758
cubic metre/hour	CPH	0.00 ... 2.40	0.00 ... 2.88

^1) For litre/hour, 1/10 of the LPH value is displayed.

The displayed value must be multiplied by factor 10.

Example: displayed value = 98; real value = 98 * 10 = 980 LPH

Scale drawing

152 □120 M12x1 90 98 27 27

Operating modes

Run mode

Normal operating mode

With power on and the power-on delay time elapsed* (approx. 10s) the unit is in the Run mode. It monitors and generates output signals according to the set parameters.

The display indicates the current flow (can be deactivated, → page 25).

The yellow LEDs indicate the switching state of the outputs.

*During the power-on delay time the most important parameter values are displayed briefly, then the current measured value is indicated. Even if the display is deactivated (diS = OFF), the most important parameter values are indicated, then the current measured value is indicated for 15s, then the display goes out.

Both outputs are switched according to the programming: ON with the NO function (Hno/Fno) and OFF with the NC function (Hnc/Fnc).

Note: When the hysteresis function is active, the outputs remain in this switching state after the power-on delay time has elapsed if the flow is between SPx and rPx.

If output 2 is configured as analog output, the output signal is 20mA or 10V.

Display mode

Indication of parameters and the set parameter values

When the "Mode/Enter" button is pressed briefly, the unit passes to the Display mode which allows parameter values to be read. The internal sensing, processing and output functions of the unit continue as if in Run mode.

- The parameter names are scrolled with each pressing of the "Mode/Enter" button.

- When the "Set" button is pressed briefly, the corresponding parameter value is displayed for 15s. After another 15s the unit returns to the Run mode.

Programming mode

Setting of the parameter values

While viewing a parameter value pressing the "Set" button for more than 5s causes the unit to enter the programming mode. You can alter the parameter value by pressing the "Set" button and confirm the new value by pressing the "Mode/Enter" button. The internal sensing, processing and output functions of the unit continue as if in Run mode with the original parameter values unless a new value is confirmed. The unit returns to the Run mode when no button has been pressed for 15s.

Installation

Step 1

Seal the pipe threads (A) with liquid seal.

A SP1 SP2 Magnetic input A

Step 2

Mount the unit in direction of the flow (arrow)*. Screw the pipes into the adapters (B) and tighten them. Tightening torque: 30Nm. Block the adapters by means of a spanner. Do not turn the 2 adapters (B). This would lead to a faulty sealing inside the housing.

B MP1 MP2 MicroEnter S01 B

Minimum distance

To avoid malfunction a minimum distance (5 x pipe diameter) between the flow monitor and bends, valves, changes in cross-section or such like must be observed (This information refers to laminar flow).

min. 5 x D SP1 SP2 ModelError Int. D min. 5 x D

*For certain mounting positions (unit vertical, flow direction horizontal) air bubbles in the system can affect the measurement after mounting. Briefly rinse the system after mounting (rinse flow rate > 3l/min.).

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.

Disconnect power before connecting the unit.

Wiring:

graph TD
    A["2: OUT2"] --> B["1: BN"]
    A --> C["2: WH"]
    A --> D["4: BK"]
    A --> E["3: BU"]
    F["4: OUT1"] --> G["2: OUT2"]
    F --> H["4: OUT1"]
    I["L+"] --> J["L-"]
    K["L+"] --> L["BU"]

graph TD
    A["2: OUT2\n4: OUT1"] --> B["1: BN"]
    A --> C["2: WH"]
    A --> D["3: BU"]
    A --> E["4: BK"]
    B --> F["L+"]
    C --> G["L-"]
    D --> H["L+"]
    E --> I["L-"]

1 x p-switching / 1 x analog 1 BN 2 WH 4 BK 3 BU 2: OUT2 4: OUT1 L+ L-

1 x n-switching / 1 x analog 1 BN 2 WH 4 BK 3 BU 2: OUT2 4: OUT1 L+ L-

Core colours of ifm sockets:

1 = BN (brown), 2 = WH (white), 3 = BU (blue), 4 = BK (black).

Programming

Adjustable parameters

→ page 24

Menu structur

→ page 3

1		Press the Mode/Enter button several times until the respective parameter is displayed.
2		Press the Set button and keep it pressed. The current parameter value flashes for 5s, then the value is increased* (incremental by pressing briefly or scrolling by holding pressed).
3		Press the Mode/Enter button briefly (= acknowledgement). The parameter is displayed again, the set parameter value becomes effective.
4	Change more parameters: Start again with step 1.	Finish programming: Wait for 15s or press the Mode/Enter button until the current measured value is indicated again.

*Decrease the value: Let the display of the parameter value move to the maximum setting value. Then the cycle starts again at the minimum setting value.

Timeout

If no button is pressed for 15s during the setting procedure, the unit returns to the Run mode with unchanged values.

Locking / Unlocking

The unit can be electronically locked to prevent unwanted adjustment of the set parameters: Press (in Run mode) both pushbuttons for 10s. As soon as the indication goes out the unit is locked or unlocked. Units are delivered from the factory in the unlocked state.

With the unit in the locked state is indicated briefly when you try to change parameter values.

Operation

After mounting, wiring and setting check whether the unit operates correctly.

Failure indication

OL	excess flow (flow > 120% of the final value of the measuring range)
ULO	flashing: supply voltage too low (< 19V); the switching outputs are reset, the analog signal is reset to 0V / 0mA.
SC1	flashing: short circuit of the switching output 1
SC2	flashing: short circuit of the switching output 2
SC	flashing: short circuit of both switching outputs

Technical information / Functioning / Parameters

Adjustable parameters

Menu structure → page 3

SP1SP2	Switch-on point 1 / 2:Upper limit value at which the output changes its switching status.SP2 is active only if OU2 = Hno, Hnc, Fno or Fnc.
rP1rP2	Switch-off point 1 / 2:Lower limit value at which the output changes its switching status.rPx is always lower than SPx. The unit only accepts values which are lower than SPx.Changing the switch-on point also changes the switch-off point (the distance between SPx and rPx remains constant).If the distance is higher than the new switch point, it is automatically reduced: rPx is set to the minimum setting value (0.0).rP2 is active only if OU2 = Hno, Hnc, Fno or Fnc.
	Setting range		SP1 / SP2 rP1 /	P2 in steps of
	litre/min.	L, E	0.4 ... 48.0	0.0 ... 47.6 0.1
	gallons/min	GAL	0.1 ... 12.7 0.0	... 12.6 0.1
	litre/hour1)	LPH	20 ... 2880 0 ...	2860 10
	gallons/hour	GPH	6 ... 758 0 ...	752 1
	cubic metre/hour	CPH	0.02 ... 2.88 0.00	... 2.86 0.01
OU1	Configuration of output 14 switching functions can be set:- Hno = hysteresis / normally open- Hnc = hysteresis / normally closed- Fno = window function / normally open- Fnc = window function / normally closed
OU2	Configuration of output 24 switching functions and 2 analog signals can be set:- Hno = hysteresis / normally open- Hnc = hysteresis / normally closed- Fno = window function / normally open- Fnc = window function / normally closed- I = analog output 4 ... 20mA- U = analog output 0 ... 10V
ASP	Lower end of analog output (Explanation → page 27)Measured value for which the output signal is 4mA / 0V.ASP is active only if OU2 = I or U.
REP	Upper end of analog output (Explanation → page 27)Measured value for which the output signal is 20mA / 10V.Minimum distance between ASP and AEP = 40% of the value of the measuring range.AEP is active only if OU2 = I or U.
	Setting range		ASP	AEP in steps of
	litre/min.	L, E	0.0 ... 32.0	16.0 ... 48.0 0.1
	gallons/min	GAL	0.0 ... 8.5 4.2 ...	12.7 0.1
	litre/hour1)	LPH	0 ... 1920	960 ... 2880	10
	gallons/hour	GPH	0 ... 506 253	... 758	1
	cubic metre/hour	CPH	0.00 ... 1.92	0.96 ... 2.88	0.01
d1A	Inside pipe diameterSetting the flow monitor to the selected pipe size.Not implemented for this unit version (the preset value is displayed).

^1) LPH (litre/hour) value = displayed value ×10

Technical information / Functioning / Parameters

EF	Enhanced functionsThis menu item contains a submenu with additional parameters. You can access these parameters by pressing the SET button briefly.
HILO	Min-Max memory for flow rate:HI: displays the highest measured flow rangeLO: displays the lowest measured flow rangeErase the memory:- Press the "Mode/Enter" button until HI or LO is displayed.- Press the "Set" button and keep it pressed until "-" - - - " is displayed.- Then press the "Mode/Enter" button briefly.It is recommended to erase the memory as soon as the unit starts working under normal operating conditions.
CGA	Customer-specific calibration (Explanation →page 26)If the function is active, the current flow value is displayed.- Press the SET button to set the requested value(scrolling by holding pressed; incremental by pressing briefly).- Acknowledge with the Mode/Enter button.After calibration the LED "calibration indicator" is lit.Calibration is only possible for values >25% of the final value of the measuring range. For smaller values LO is displayed, the setting of the parameter is disabled.Setting range: -40% ...+40% of the final value of the measuring range;max. value displayed: final value of the measuring range + 20%.
CAr	Calibration reset- Press the "Mode/Enter" button until CAR is displayed.- Press the "Set" button and keep it pressed until "-" - - - " is displayed.- Then press the "Mode/Enter" button briefly.The calibration set by CGA is reset; the LED "calibration indicator" no longer lights.
dSt	Start-up delayDuring this time special conditions apply to the switching of the outputs(Explanation →page 28)adjustable in steps of 1s. setting range: 0 ... 50s (0 = start-up delay not active).The time applies to both outputs.
P-n	Output polarity2 options can be selected:- PnP = positive switching-nPn = negative switchingThis setting applies to both switching outputs.
d15	Setting of the display2 options can be selected:d3 = normal displayOFF = The display is deactivated in the Run mode.When one of the buttons is pressed the current measured value is displayed for 15s.When the Mode/Enter button is then pressed, the display mode is opened.The LEDs indicating the switching state and the calibration indicator remain active even if the display is deactivated.
Uni	Display unit5 options can be selected:Lit = litre/min.; GAL = gallons/min.; LPH = litre/hour; GPH = gallons/hour;CPH = cubic metre/hourLabels for the different units of display are enclosed with the unit. Stick the respective label on the sensor or fill in the blank label.Select the display unit before setting the switch points (SPx, rPx) or the limits for the analog output signal (ASP, AEP). This avoids rounding errors generated internally during the conversion of the units and enables exact setting of the values.

Technical information / Functioning / Parameters

Customer-specific calibration (CGA)

This calibration changes the slope of the curve of measured values. It influences the display and the analog output.

Calibration is only possible for values > 25% of the final value of the measuring range.

It can be reset ( menu item CAr).

A = curve of measured values without calibration
A1, A2 = curve of measured values after calibration

Hysteresis

The hysteresis keeps the switching state of the output stable if the flow varies about the preset value.

When the flow is rising, the output switches when the switch-on point has been reached (SPx). When the flow is falling again, the output switches back when the switch-off point (rPx) has been reached.

The hysteresis can be adjusted: First the switch-on point is set, then the switch-off point with the requested difference.

Window function

The window function enables the monitoring of a defined acceptable range. When the flow varies between the switch-on point (SPx) and the switch-off point (rPx), the output is switched (window function/NO) or not switched (window function/NC).

Technical information / Functioning / Parameters

Scaling the measuring range (analog output)

With the parameter "Lower end of analog output" (ASP) you can select the measuring value for which the output signal is 4mA or 0V. With the parameter "Upper end of analog output" (AEP) you can select the measuring value for which the output signal is 20mA or 10V.

Minimum distance between ASP and AEP = 40% of the final value of the measuring range.

Voltage output 0 ... 10V

MEW = value of measuring range

The output signal is between 0 and 10V in the set measuring range. It is also indicated:

Flow above the measuring range: output signal > 10V.

Current output 4 ... 20mA

MEW = value of measuring range

The output signal is between 4 and 20mA in the set measuring range. It is also indicated:

Flow above the measuring range: output signal > 20mA.

Technical information / Functioning / Parameters

Start-up delay (dSt)

If the start-up delay is active (dSt > 0), the following conditions apply: As soon as the flow has reached the value 3% of the final value (FV)

• the start-up delay starts and
- the outputs are switched according to the programming: ON with the NO function (Hno / Fno), OFF with the NC function (Hnc / Fnc).

During the start-up delay 2 cases are possible:

• fast increase of flow, switch point / acceptable range are reached within dSt → outputs remain active.
• slow increase of flow, switch point / acceptable range are not reached (or flow falls below 3%) within dSt → outputs are reset.

Example dSt with hysteresis function:

1	flow reaches 3% of the final value (FV) → dSt starts, the output becomes active
2	dSt has elapsed, flow has reached SP → the output remains active
3	flow falls below SP but remains above rP →the output remains active
4	flow falls below rP →the output is reset
5	flow reaches 3% of the final value again → dSt starts, the output becomes active
6	dSt has elapsed, flow has not reached SP → the output is reset
7	flow reaches SP →the output becomes active

Technical information / Functioning / Parameters

Example: dSt with window function:

1	flow reaches 3% of the final value (FV) → dSt starts, the output becomes active
2	dSt has elapsed, flow has reached the acceptable range → the output remains active
3	flow exceeds SP (leaves the acceptable range) → the output is reset
4	flow falls below SP again → the output becomes active again
5	flow falls below rP (leaves the acceptable range) → the output is reset again
6	flow reaches 3% of the final value again → dSt starts, the output becomes active
7	dSt has elapsed, flow has not reached the acceptable range → the output is reset
8	flow reaches acceptable range →the output becomes active

Technical data

Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . monitoring of cooling water

Operating voltage [V] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 ... 28 DCCurrent rating [mA] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . short-circuit prot., reverse polarity / overload prot.Voltage drop [V]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 2Current consumption [mA] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Analog output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Measuring range scalableMax. load current output [Ω] 500Min. load with voltage output [Ω] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000

Medium temperature [°C] +5 ... +80Operating temperature [°C] +10 ... +60Pressure rating [bar] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Measurement error [% of measured value]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power-on delay time [s] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Start-up delay [s] . . . . . . . . . . . . . . . . . . . Response time [s] . . . . . . . . . . . . . . . . . . . . . 1 ... 3

Protection IP 65 / IIIMaterials (wetted parts) . gunmetal (2.1096.01), stainless steel (316L), PPR.(Hostalen); EPDM 80 shore; PES (Ultrason 2010); CuZn39Pb3; Centellen 200Housing material CuZn39Pb3, ABS, PA

① ② ③ ④ ⑤ ⑥ ⑦ ⑧ SP1 SP2 Mode/Enter Set

^1) For litre/h. 1/10 of the LPH value is displayed.

The displayed value must be multiplied by factor 10.

Example: displayed value = 98; real value = 98 * 10 = 980 LPH

Dimensions

152 □120 M12x1 90 98 27 Ø27

A SP1 SP2 Control panel A

Pas 2

1 = BN (brun), 2 = WH (blanc), 3 = BU (bleu), 4 = BK (noir).

Programmation