B+B THERMO-TECHNIK HYG LECKAGE 24V Datasheet

OPERATION MANUAL

Leakage alarm unit
water detector, model 12 V or 24 V AC/DC

Description

DescriptionDescription

Characteristic features

• Safe operation, impedance measuring principle

• Operating voltage 12 V DC/AC

• 2 integrated, gold plated measuring tips

• Potential free switch output (Relay) 30 V / 4 A

• Adjustable sensitivity and switching mode

• Adjustable measuring level 0...15 mm

• Simple mounting

Areas of application

• Sanitary plants, water installation

• Monitoring of cooling systems

• Condensate switch for collection tanks

• Building instrumentation, air-conditioning

Technical data

Leckage alarm unit

Measuring principle electrolytic conductivity
Measuring medium
Application temperature
Operating voltage 12 V
(optionally) 24 V

Current consumption 13,5 mA (without leckage)

Switching power
Switching point
Switching output

Cable gland
Electrical connection
Housing ABS, Ingress protection IP54
EMC noise emission EN 61000-6-3:2011
EMC noise immunity EN 61000-6-1:2007
CE-Conformance 2004/108/EG
Dimensions (W x H x D) 82 x 130 x 60 mm

Article Description Art.-No.

Leakage alarm unit 12 V
Leakage alarm unit 24 V LEME-24V

conducting liquids, construction material
+5...+60 °C
12 VDC ±10 %, max. 80 mA
24 VDC ±10 %, max. 80 mA

58 mA (with leckage)
max. 80 mA (with leckage and extra
probe)
30 V / 4 A (100 k)

approx. 2...60 kΩ (type. 15 kΩ)

16 A / 250 V AC
16 A / 30 V AC
M16 x 1,5

compression tting 1,5 mm²

LEME-12V

Functional description

The leakage monitor works as per the operating principle of electrolytic
conductance measurement. There are two electrodes beneath the device
which are evaluated by means of AC impedance measurement. As soon
as the conductance value between the electrodes rises over an adjust
able limit, the relay contact closes. Because of the universally concepted
model with gold plated spring loaded electrodes with height adjustable
device feet, it is suitable for a wide variety of applications.

-

Monitoring of collection tanks:

The device can be directly placed in the tank to be monitored. Over the
height adjustable feet, the permissible liquid level can be adjusted at
which the device has to switch (approx. 0.5...15 mm).

Leakage monitor:

In order to detect small liquid quantities, the spring loaded electrodes are
placed directly on an insulating base of absorbent material (for example
hardboard, cardboard, cloth). As soon as the leaking out liquid is ab
sorbed by the base, the device gives out an alarm.

-

Construction or wood humidity monitor:

For this application, the springy electrodes are put directly on the material
to be monitored. If there is high humidity in the underground, the device
gives out an alarm.

Technical changes reserved
0141 0316-83 11.08.2015

B+B Thermo-Technik GmbH | Heinrich-Hertz-Straße 4 | D-78166 Donaueschingen
Fon [phone] | Fax [phone] | [e-mail] | bb-sensors.com

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OPERATION MANUAL

Leakage alarm unit
water detector, model 12 V or 24 V AC/DC

Connection

After unscrewing the sensor cover, the control cable is inserted into the
cable gland M16. The operating voltage supply (12 or 24 V AC/DC) is
connected at the terminals AC/DC+ and AC/GND. The potential free
changeover contacts are connected to terminals NC, COM and NO.
Care to be taken that the cable gland is assembled water tight and the
cover gasket is correctly inserted.

Up-Keeping

The leakage alarm unit is, as far as possible, maintenance free. How­ever, the housing lower side and the measuring tips should be occasi­onally (e.g. once in a year, depending on mounting location) cleaned
with a wet cloth. If there is a continuous alarm, even without touching
the water, that means there is a heavy contamination.

Application Notes

Because of the electrolytic evaluation, the device is suitable for all liquids
or construction material, which are electrically conductive (> 150 μS).
However, the device is not suitable for detection of nonconducting
liquids like oil or distilled water. In acidic or alkaline media or in unk­nown materials with impurities, the material compatibility of the probe
is to be checked before use. In case of application in dirty medium, the

probe tips should be periodically cleaned. The use in inammable or

explosive environment is not permissible. The device is not intended
for connecting to the mains voltage. While monitoring of tanks, cros­sing over the tank should be avoided. The safety regulations are to be
duly followed!

Jumper Plugs

Conguration

1 S3 Signal generator switching mode (dry)
2 S2 Middle contact for S3, S1
3 S1 Signal generator switching mode (wet)
4 GND Signal generator grounder
5 BUZ Signal generator output
6 T3 Relay switching mode (dry)
7 T2 Middle contact for T3, T1
8 T1 Relay switching mode (wet)
9 HZ1 Heating (only for external sensor)

10 HZ2 Heating (only for external sensor)

Factory setting: S3-S2, T1-T2, HZ1-HZ2

Connection Layout

Clamp Function Description

1 AC/GND Versorgung 12 or 24 V AC/DC*
2 AC/DC+ Versorgung 12 or 24 V AC/DC*
3 REL-COM Hauptrelais, Bockpol
4 REL-NO Hauptrelais, Schliesserl

5

*according to model

A further probe (special accessories) can be connected to the sensor
connection, which can be additionally monitored by the built in elect­ronics.

REL-NC Hauptrelais, Öffner

Settings

Output signal generator (optional):
A passive Piezo-signal generator can be connected at the plug con­nector (Pin BUZ and GND). The status of signal (acoustic signal at dry
or wet) can be adjusted with the jumper plugs S1-S2 or S2-S3. In the
position S2-S3, the signal generator is active on detecting leakage.

Switching mode:
The switching mode of the relay (closed or open during wet) can be
adjusted with the jumper plugs of T1-T2 or T2-T3. In the factory routine
adjustment, the jumper T1-T2 is plugged and the relay closes if the
electrodes detect leakage.

Sensitivity setting:
The sensitivity of humidity alarm can be changed with a potentiometer.
A higher sensitivity is achieved if the potentiometer axis is rotated in
the clockwise direction. Normally, the middle position is most suitable.
Please note that no functioning takes place at the end positions.

Technical changes reserved
0141 0316-83 11.08.2015

B+B Thermo-Technik GmbH | Heinrich-Hertz-Straße 4 | D-78166 Donaueschingen
Fon [phone] | Fax [phone] | [e-mail] | bb-sensors.com

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