LI2243 - Detector IFM - Free user manual and instructions

USER MANUAL LI2243 IFM

Operating instructions Binary leakage sensor

M = Höhe Montageadapter

Z34051.221.65.40-11/22

Contents

1 Preliminary note 3
1.1 Symbols used. 3
2 Safety instructions 3
3 Functions and features 4

3.1 Applications 4
3.2 Restriction of the application area 4

4 Function 4

4.1 Measuring principle 4
4.2 Features of the unit 5

5 Installation. 5

5.1 Installation location / environment 5
5.2 Mounting. 6
5.3 Set the installation depth 6

6 Electrical connection. 7
7 Operating and display elements 7
8 Settings. 8

8.1 Set to the empty vessel 8
8.2 Set to the full vessel 8
8.3 Lock/unlock the unit 9

9 Operation 9

10 Maintenance, repair, disposal. 9
11 Scale drawing 10
12 Technical data. 10

Note on approvals to WHG:

The unit described here has been approved to WHG (Federal Water Act, Federal Act applicable in the Federal Republic of Germany).

For more detailed provisions and information on the approval to WHG please see the German operating instructions.

1 Preliminary note

1.1 Symbols used

Instructions

Reaction, result

[...] Designation of pushbuttons, buttons or indications

Cross-reference

Important note

Non-compliance can result in malfunction or interference.

Information

Supplementary note.

2 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.
• If the operating instructions or the technical data are not adhered to, personal injury and/or damage to property can occur.
• Installation, electrical connection, set-up, operation and maintenance of the unit must only be carried out by qualified personnel authorised by the machine operator.
• The unit complies with the standard EN 61000-6-4. The unit may cause radio interference in domestic areas. If interference occurs, the user must take appropriate remedial actions.

3 Functions and features

The unit monitors collection chambers, basins or systems as well as inspection chambers and feeder chutes for the leakage of liquids.

3.1 Applications

Water, hydrous media, oils, coolant emulsions.

3.2 Restriction of the application area

• The unit is not suitable for acids, alkalis, granulates, bulk materials.
  It is not suitable for hygienic areas.
• Highly conductive foam can trigger a switching operation. Check the consequences by performing a test in your application!
• Maximum tank pressure: ± 0.5 bar (when mounted using the appropriate mounting accessories; 5.2 Installation procedure).

4 Function

4.1 Measuring principle

The unit operates to the capacitive measuring principle. By direct contact with the medium the unit detects whether leakage is detected and indicates this by a switched signal.

Leakage detected output open (OFF)
No leakage detected output closed (ON)

The dielectric constant of a medium is important for its detection. Media with a dielectric constant >1.8 are safely detected.

Dielectric constants of common liquids
Mineral oil ≈ 2
Coolant emulsion ≈ 25...75
Glycol ≈ 37
Water ≈ 80
Water, demineralised ≈ 30

Electrically conductive and non conductive media are detected.

The unit operates with radial detection characteristics. Media are only detected when the active zone (A) is covered.

UK

4.2 Features of the unit

Automatic adjustment function to the medium to be detected by programming buttons ( 8 Settings). This allows reliable detection of media with a low dielectric constant (e.g. oil).
Response level selectable by the installation length ( 5.3)
- The unit is virtually immune to almost any kind of build-up on the probe. The position of the switching level within the active zone can however change with build-up.
- Operating and switching status indication via LED ring.

5 Installation

5.1 Installation location / environment

• Installation of the unit: vertical from the top ( 5.3) .

The following minimum distances must be adhered to:

• Distance tank bottom - end of the probe: 5mm
• Distance metal tank wall - probe: 20mm

5.2 Mounting

The unit is mounted using a mounting clamp or an adapter. The following standard mounting accessories are available:

Order no. Material

E43000 mounting clamp (for non-pressurised tanks)

E43001 flange plate 73-90 with clamp adapter (pressure rating of 0.5 bar)

E43002 welding adapter with clamp adapter (pressure rating of 0.5 bar)

E43003 mounting adapter G¾ with clamp adapter (stainless steel, pressure rating of 0.5 bar)

E43004 mounting adapter G1 with clamp adapter (stainless steel, pressure rating of 0.5 bar)

E43005 flange plate 100-125 with clamp adapter (aluminium, pressure rating of 0.5 bar)

E43006 flange plate 65-80 with clamp adapter (aluminium, pressure rating of 0.5 bar)

E43007 flange plate 54 - 52x52 with clamp adapter (aluminium, pressure rating of 0.5 bar)

E43016 mounting clamp with mounting bracket (for non-pressurised tanks)

E43019 mounting adapter G¾ with clamp adapter (brass, pressure rating of 0.5 bar)

Further accessories on request.

5.3 Set the installation depth

A = response level

H = tank height

L = probe length

L1 = installation depth

L2 = extension length

L3 = mounting length (min.: 60 mm)

M = height mounting adapter

MET = max. immersion depth

(Active zone) = 31 mm

S = height of the boss

Select the installation length L1 so that at least half the MET zone is covered when the response level A has been reached, that is: L1 = (H - A) + 12 MET + S.

The unit switches when the level reaches the MET zone. The exact position (exact response level) depends on the following factors:

• characteristics of the medium.
  Installation conditions.
• adjustment of the unit ( 8 Settings).

6 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:

core colours of ifm sockets: 1 = BN (brown), 3 = BU (blue), 4 = BK (black)

7 Operating and display elements

1: LED ring green / yellow

• green: leakage detected / output open (OFF)
• yellow: no leakage detected / output closed (ON)

2: programming button OUT OFF
3: programming button OUT ON

8 Settings

Before the first set-up the empty adjustment must be carried out.

8.1 Set to the empty vessel

This adjusts the unit to both the empty collection basin and the installation conditions (e.g. the set installation length). Previous settings are deleted.

Ensure that the collection basin / vessel is empty.

Press the programming button (OUT ON) for at least 2s.

The yellow LED flashes slowly (approx. 1 Hz) (= unit is in the adjustment mode).
After the adjustment process the yellow LED is lit continuously (= unit is in the operating mode, sensor zone not covered).

8.2 Set to the full vessel

The empty adjustment is sufficient for media with a low dielectric constant (e.g. oils). For aqueous media the sensitivity must be optimised by a full adjustment. The full adjustment does not change the settings of the empty adjustment.

Fill the collection basin until the active zone of the unit is covered.

Press the programming button (OUT OFF), keep it pressed for at least 6 s.

The yellow LED flashes, after 6 s rapidly (approx. 2Hz ), (= device is in the adjustment mode).
After adjustment the green LED is lit continuously (= unit is in the operating mode, sensor zone covered).

8.3 Lock / unlock the unit

The unit can be locked electronically to prevent unintentional settings.

Locking

Press both setting buttons simultaneously for 10 s in the operating mode.

The LED flashes green.
After the time (>10s) has elapsed, the colour of the LED changes from green to yellow (flashing) and the unit is locked.

Unlocking

Press both setting buttons simultaneously for 10 s in the operating mode.

The LED continues to indicate the current operating status (no reaction of the LED).
After the time (>10s) has elapsed, the LED flashes green and the unit is unlocked.

On delivery: unlocked.

9 Operation

When the supply voltage has been applied, the unit is in the operating mode. It carries out its measurement and evaluation functions and switches the output.

Operation indication by LED:

LED status / function

green unit ready for operation, sensor zone covered (output open (OFF))

yellow unit ready for operation, sensor zone not covered (output closed (ON))

10 Maintenance, repair, disposal

Recommended maintenance:

Check the probe for build-up from time to time, clean it in case of strong soiling.

After removal of the unit or a change of media with dielectric constants that differ greatly (e.g. oil / water) another adjustment has to be carried out.

It is not possible to repair the unit.

After use dispose of the unit in an environmentally friendly way in accordance with the applicable national regulations.

11 Scale drawing

Dimensions in mm

1: programming buttons;
A: active zone (31 mm)
L: probe length in mm: 132 (LI2241) 273 (LI2242) 481 (LI2243)

12 Technical data

Operating voltage[V]	10...36 DC
Current rating [mA]	200
Short-circuit protection (pulsed); protected against reverse polarity and overload
Current consumption [mA]	< 22
Voltage drop [V]	< 2.5
Dielectric constant medium	>1.8
Max. tank pressure [bar]	±0.51)
Housing materials	PP-GF orange; TPE-U
Material (wetted parts)	PP
Protection rating	IP 65 / IP 67
Protection class	II
Ambient temperature [°C]	0..60
Medium temperature oil [°C]	0..65
Medium temperature water and media similar to water [°C]	0..35
Storage temperature [°C]	-25 ... 80
Shock resistance [g]	12 (DIN EN 60068-2-29, 11 ms)
Vibration resistance [g]	5 (DIN EN 60068-2-6, 10...2000 Hz)
EMC	EN 61000-6-2: 2005 + Corr. 2005
	EN 61000-6-4: 2007

1)when mounted using pressure-resistant mounting accessories ( 5.2)

More information at www.ifm.com

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(zone active) = 31 mm