IFM SI500A Manuel utilisateur

Operating instructions

Flow monitors

SI500A

704544 / 02 09 / 2017

Contents

1 Safety instructions �� 3

2 Functions and features�� 4

2�1 Application area �� 4

2�2 Operating principle flow monitoring �� 4

3 Installation �� 5

3�1 Installation location�� 5

3�2 Sources of interference in the pipe system �� 6

3�3� Mounting operation�� 6

4 Electrical connection�� 7

5 Operating and display elements�� 7

6 Set-up and settings for water�� 8

6�1 Change the switch point (optional) �� 8

6�2 High flow adjustment (optional) �� 9

7 Additional settings (optional)�� 9

7�1 Low flow adjustment�� 9

7�2 Configure the switching output �� 9

7�3 Restore the factory setting (reset) �� 10

7�4 Lock / unlock the unit�� 10

8 Error during adjustment�� 10

9 Operation�� 11

10 Maintenance�� 11

11 Scale drawing �� 12

12 Technical data�� 12

Preliminary note

• An instruction is indicated by “►”:

Example: ► Check whether the unit operates correctly.

• A reaction to the action is indicated by ">":

Example: > LED 9 lights.

1 Safety instructions

• Please read the product description prior to set-up of the unit� Ensure that the

product is suitable for your application without any restrictions�

• The unit conforms to the relevant regulations and EC directives�

• Improper or non-intended use may lead to malfunctions of the unit or to un-

wanted effects in your application�

• That is why installation, electrical connection, set-up, operation and mainte-

nance of the unit must only be carried out by qualified personnel authorised by

the machine operator�

• Observe the instructions for the safe use in hazardous areas: → Operating in-

structions (Ex protection related part) for flow sensors according to EU directive

94/9/EC annex VIII (ATEX) group II, equipment category 3D/3G.

If no operating instructions (Ex protection related part) or EC declaration of

conformity is supplied with this product in the language of the EU user country,

these can be requested from your dealer (see delivery note) or manufacturer

(see cover sheet / back)�

2 Functions and features

2.1 Application area

The unit monitors the flow of liquid and gaseous media�

2.2 Operating principle flow monitoring

• The unit detects the flow speed to the calorimetric measuring principle and

switches the output:

- output closed if medium is flowing / output open if no medium is flowing�

This applies to the unit on delivery: output = normally open. In case of need you

can change the output to normally closed (→ 7.2). It then applies: output open

if medium is flowing�

• If the flow speed increases, the switching status changes when the switch point

is reached�

• If the flow speed falls again, the switching status changes if the value "SP

minus hysteresis" is reached�

The hysteresis changes with the flow speed 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 speeds�

• The typical response time of the unit 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.

3 Installation

Using process adapters the unit can be adapted to different process connections�

• Adapters have to be ordered separately as accessories�

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�

3.1 Installation location

General

≥12

• The sensor tip is to be completely sur-

rounded by the medium�

• Insertion depth of the sensor: minimum

12 mm�

Recommended

• For horizontal pipes: mounting from

the side�

• For vertical pipes: mounting in the rising

pipe�

Conditional

• Horizontal pipe /mounting from the bot-

tom: if the pipe is free from build-up.

• Horizontal pipe /mounting from the

top: if the pipe is completely filled with

medium�

To avoid

• The sensor tip must not be in contact

with the pipe wall�

• Do not mount in downpipes that are

open at the bottom!

3.2 Sources of interference in the pipe system

Components integrated in the pipes, bends, valves, reductions, etc� lead to turbu-

lence of the medium� This affects the function of the unit�

Recommendation: Adhere to the distances between sensor and sources of

interference:

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 











 









D = pipe diameter; S = sources of interference

3.3. Mounting operation

►Ensure that the system is free of pressure during installation�

►Ensure that no media can leak at the mounting location during installa-

tion�

123

► Grease the threads of the process connection (1), adapter (2) and nut (3).

Note: The sensor tip (A) must not be in contact with grease.

►Screw the suitable adapter into the process connection�

►Place the flow monitor onto the adapter and tighten the nut� Tightening torque

25 Nm� Ensure that the unit is correctly oriented�

4 Electrical connection

The unit must be connected by a qualified electrician�

The national and international regulations for the installation of electrical

equipment must be adhered to�

Voltage supply to EN 50178, SELV, PELV�

► Disconnect power.

► Connect the unit as follows:

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

















Core colours of ifm sockets:

1 = BN (brown), 3 = BU (blue), 4 = BK (black)

5 Operating and display elements

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







 

1: Operation display

• The green LEDs indicate the current flow (the LEDs 0 to 9 represent the range between

no flow and maximum flow)�

• A lighting LED indicates the position of the switch point (orange = output closed, red =

output open)�

2, 3: Setting buttons for adjustment and configuration

6 Set-up and settings for water

(For media other than water → 7.1: Low flow adjustment).

►Switch on the supply voltage�

> All LEDs light and go out again step by step. During this time the output is

closed (if configured as normally open)� The unit is in the operating mode�

►Let the normal flow circulate in the installation�

►Check the display and determine further actions�

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



The factory setting is suitable for the applica-

tion�

►No further settings are required�

 





Your normal flow is below the representation

range of the display�

2 setting options:

► Change the switch point (→ 6.1).

► Carry out high flow adjustment (→ 6.2).

 





Your normal flow exceeds the representation

range of the display (LED 9 flashes).

► Carry out high flow adjustment (→ 6.2).

You can restore the factory setting any time. (→ 7.3).

6.1 Change the switch point (optional)

For the factory setting the switch point is at LED 7. A change makes sense if:

• the display shows example 2�

• the flow fluctuates much or pulsates�

• if a faster response time of the unit is requested (low switch point = fast re-

sponse with rising flow, high switch point = fast response with falling flow).

► Briefly press the pushbutton or �

> The switch point LED flashes.

►Press the pushbutton or as often as required� Each press of the push-

button shifts the LED by one position in the indicated direction.

Note: If no pushbutton is pressed for 2 s, the unit returns to the operating mode

with the newly set value�

6.2 High flow adjustment (optional)

The unit determines the existing flow as normal flow and adapts the display repre-

sentation (all LEDs except the switch point LED light green).

►Let the normal flow circulate in the installation�

►Press the pushbutton and keep it pressed�

> LED 9 lights, after approx. 5 s it flashes.

►Release the pushbutton�

The unit is now adapted to your flow conditions� It passes into the operating mode,

the display should now show example 1�

Note: The adjustment affects the switch point: It is increased proportionally

(maximum up to LED 7).

7 Additional settings (optional)

7.1 Low flow adjustment

If the unit is used in media other than water, you should additionally adapt the unit

to the minimum flow�

Note: The following adjustment must only be carried out after the high flow adjust-

ment�

►Let the minimum flow circulate in the installation or ensure flow standstill�

►Press the pushbutton and keep it pressed�

> LED 0 lights, after approx. 5 s it flashes.

►Release the pushbutton� The unit adopts the new value and passes into the

operating mode�

7.2 Configure the switching output

The unit is delivered as normally open� In case of need you can change the output

to normally closed:

►Press the pushbutton for at least 15 s�

> LED 0 lights, after approx. 5 s it flashes.

> After 10 s the current setting is displayed: LEDs 5...9 light orange (= output

normally open)�

> After approx. 15 s LEDs 0...4 flash orange.

►Release the pushbutton� The output is changed to normally closed operation�

For a new changeover repeat the operation�

7.3 Restore the factory setting (reset)

►Press the pushbutton for at least 15 s�

> LED 9 lights, after approx. 5 s it flashes.

> After approx. 15 s LEDs 0...9 flash orange.

► Release the pushbutton. All settings are reset to the factory setting:

- operating area: 5 ...100 cm/s for water

- switch point: LED 7

- output function: NO

- unlocked�

7.4 Lock / unlock the unit

The unit can be locked electronically to prevent unintentional settings�

►Press both setting pushbuttons simultaneously for at least 10 s in the operating

mode�

> The indication goes out, the unit locks or unlocks�

On delivery: unlocked.

8 Error during adjustment

If no adjustment is possible, all LEDs flash red. The unit then passes into the

operating mode with unchanged values�

Possible cause /aid:

Error during installation�

►Read chapter 3 Installation�

Check whether all requirements have

been met�

The difference between maximum flow and

minimum flow is too small�

►Increase the flow difference and carry

out the adjustment once again�

The sequence high flow /low flow adjust-

ment was not adhered to�

►Carry out the two adjustment operations

again in the right sequence�

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