Labkotec D25236EE-3 Capacitive Oil Pn Water Detector Instruction Manual
- June 13, 2024
- Labkotec
Table of Contents
Labkotec D25236EE-3 Capacitive Oil Pn Water Detector
Labkotec Oy is a Finnish company that manufactures the SET/OSK2, a floating sensor designed to detect a minimum of 15 mm thick oil or hydrocarbon layer on water. It is commonly used in inspection shafts and basins with varying liquid levels.
Product Specifications
- Product Name: SET/OSK2 Capacitive oil-on-water detector
- Manufacturer: Labkotec Oy
- Model Number: D25236EE-3
- Dimensions: Please refer to Figure 1
- Equipment Group: II
- Category: 1 G
- Hazardous Area Compatibility: Zone 0/1/2
- Cable Type: Shielded 3-wire cable
SYMBOLS
- Warning / Attention
- Pay special attention to installations at explosive atmospheres
GENERAL
SET/OSK2 is a floating sensor, which provides an alarm of at least 15 mm thick oil or hydrocarbon layer on water. The most common applica-tions are for example inspection shafts and different kind of basins with altering liquid level. The sensor must be in the liquid all the time, otherwise it gives an alarm if it is left in the air. SET/OSK2 is an apparatus of equipment group II, category 1 G. The sensor can be installed in zone 0/1/2 hazardous area.
CONNECTIONS AND INSTALLATION
- SET/OSK2 is equipped with a shielded 3-wire cable. The wires 1 and 2 shall be connected to the corresponding connectors (1 = +, 2 = -) in the control unit. Wire 3 shall be connected to equipotential ground together with the shield of the cable. Ground connector of the float frame shall be connected to equipotential ground. Please refer also to the installa-tion instructions of the control unit.
- The cable can be shortened or, when the control unit is located further away from the sensor, the cable can be extended with the junction box, which is included in the delivery.
- The sensor floats freely on the liquid. Therefore, please use long enough a cable to avoid hanging in the air in critical situations (e.g. when the liquid level decreases).
- When installing the sensor into an explosion hazardous area (0/1/2), the following standards need to be followed; EN IEC 60079-25 Electrical apparatus for potentially explosive atmospheres – In-trinsically safe electrical system “i”, EN IEC 60079-14 Electrical ap-paratus for explosive gas atmospheres.
- The sensor shall not be installed into a space where caustic va-pour, gas or liquid, such as aromatic and chlorinated hydrocar-bons or strong alkalis or acids, can damage the equipment.
ADJUSTING THE SWITCHING POINT
Adjusting the switching point is done as follows:
- Let the sensor float freely on the water
- Lift up the sensor as much as there is assumed to be oil or hydrocar-bon layered on the water in alarm situation (the layer that should generate an alarm).
- if the control unit does not operate, adjust the SENSE trimmer slowly until the desired switching point is reached.
The sensitivity can also be decreased by adjusting the position of the sensor lower in the floating construction. Too sensitive settings cause unnecessary alarms if there are waves in the liquid. To test the function of the sensor, lift up the sensor totally in the air. This should cause an alarm.
IF THE SENSOR DOES NOT WORK
If the sensor is located in a hazardous area an Exi-classified mul-timeter
must be used and the Ex-standards mentioned in chapter 4. SERVICE AND REPAIR
must be followed. Make sure that the sensor is properly connected to the
control unit. The voltage between connectors 1 and 2 in the control unit
should be 10,5…12V.
If the voltage is correct, measure the sensor current as follows:
- Connect the ampere meter according to the figure below by discon-necting the conducting wire 1 from the central unit.
- Measure the current.
SERVICE AND REPAIR
The sensors must always be cleaned down and tested after oil alarm and when
carrying out annual maintenance. For cleaning, a mild deter-gent (e.g.
washing-up liquid) and scrubbing brush can be used. Service, inspection and
repair of Ex-apparatus needs to be done according to standards EN IEC 60079-17
and EN IEC 60079-19.
TECHNICAL DATA
SET/OSK2 sensor
Control units| Labkotec SET control units
Cable| Shielded, oil-proof instrumentation cable 3 x 0,5mm2 Ø 5,7mm.
Standard length is 5m. Can also be delivered according to the order with a
maximum 15 m long ca- ble. The cable can be e x t ended with a similar
instrumentation cable. The maxi- mum pair resistance of the cable should not
extend 75 Ω.
Temperature
Operational
Safety
|
**** -25 C…+60 C
-25 C…+60 C
Materials| AISI 316, PVC
EMC
Emission Immunity
| **** EN IEC 61000-6-3
EN IEC 61000-6-2
IP-classification
Sensor Junction box
| ****
IP68 IP67
Ex-luokitus
ATEX
Special conditions (X)
| II 1 G Ex ia IIA T5 Ga VTT 03 ATEX 009X
Ta = -25 °C…+60 °C
The sensor cable can be extended with the junction box type LJB3-78-83 or LJB2-78-83.
Ex-connection values| Ui = 18 V I = 66 mA Pi = 297 mW
Ci = 3 nF Li = 30 µH UN= 9…18 V
Operating principle| Capacitive
Manufacturing year: Please see the serial number on the type plate| xxx x
xxxxx xx YY x
where YY = manufacturing year (e.g. 19 = 2019)
EU DECLARATION OF CONFORMITY
Labkotec Oy | Myllyhaantie 6, FI-33960 Pirkkala, Finland | Tel. +358 29 006 260 | [email protected]
Labkotec Oy
Myllyhaantie 6
FI-33960 PIRKKALA
FINLAND
Tel: +358 29 006 260
Fax: +358 29 006 1260
Internet: www.labkotec.fi