idSET-OTM Oil Layer Sensor
“
Specifications
- Product Name: idSET-OTM Sensor
- Model Number: DOC001875-EN-2
- Dimensions: Refer to product manual
- Manufacturer: Labkotec Oy
- Certifications: ISO 9001, ISO 14001
Product Description
The idSET-OTM Sensor is designed to detect oil layers in various
applications. It operates in conjunction with the idSET-OTM control
unit to provide accurate monitoring and control.
Installation
General Installation Instructions: Follow the
step-by-step guide provided in the manual to install the idSET-OTM
Sensor correctly. Ensure proper placement and secure mounting to
guarantee optimal performance.
idSET-OTM Sensor Installation: Specific
instructions for installing the sensor are detailed in the manual.
Pay attention to wiring connections and environmental factors that
may affect sensor operation.
Connections
To connect the idSET-OTM Sensor to the idSET-OTM control unit,
refer to the example outlined in the manual. Proper wiring and
configuration are crucial for seamless integration.
Functional Test
Checking Functionality: Perform a functional
test by verifying the communication between the idSET-OTM Sensor
and the control unit. Follow the procedures described in the manual
to ensure proper operation.
Maintenance
Regular maintenance of the idSET-OTM Sensor is essential for
prolonged functionality. Refer to the maintenance section in the
manual for guidance on upkeep practices and recommended
intervals.
Troubleshooting
If you encounter any issues with the idSET-OTM Sensor, consult
the troubleshooting section of the manual for potential solutions.
Follow the troubleshooting steps carefully to identify and resolve
problems.
FAQ
Q: How often should I perform maintenance on the idSET-OTM
Sensor?
A: Maintenance frequency depends on usage and environmental
conditions. It is recommended to perform regular checks as
specified in the manual, typically at least once every few
months.
Q: What should I do if the sensor readings seem
inaccurate?
A: Check for any obstructions or interferences that may affect
sensor performance. Ensure proper installation and calibration
according to the manual. If issues persist, contact customer
support for assistance.
“`
Installation and User Guide
EN
idSET-OTM Sensor Oil layer sensor
DOC001875-EN-2 6/2/2025
Installation and User Guide | idSET-OTM Sensor
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Contents
1 General information about the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Markings and symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Conformity of the product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 Limitation of liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Safety and the environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3 Installation and commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.4 Transport and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.5 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.6 Decommissioning and disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 Product operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.2 Dimensions of the idSET-OTM Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.1 General installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.2 idSET-OTM sensor installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.1 Example of connecting an idSET-OTM Sensor to an idSET-OTM control unit . . . . . . . . . . . . 10
6 Functional test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 6.1 Checking the functioning of the idSET-OTM with the idSET-OTM control unit . . . . . . . . . . . . 12
7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.1 Troubleshooting the idSET-OTM Sensor with an idSET-OTM control unit . . . . . . . . . . . . . . . 14 9 Technical specifications idSET-OTM sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 10 EX certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 11 Appendices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
11.1 APPENDIX EU Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 11.2 APPENDIX UK Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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1 General information about the manual
This manual is an integral part of the product.
Please read the manual before using the product. Keep the manual available for the entire duration of the product’s life span. Provide the manual to the next owner or user of the product. Please report any errors or discrepancies related to this manual before commissioning the device.
1.1 Markings and symbols
Safety-related markings and symbols
This marking warns of a possible hazard. Failing to observe the safety instructions in question may result in injury or death. This marking warns of a fault or hazardous situation. Failing to observe the safety instructions in question may result in injury or device breakage. This marking warns of a possible fault. Failing to observe the safety instructions in question may result in device or system breakage or erroneous operation. This marking emphasises an issue that requires special attention during installation and when using the device in an explosive atmosphere.
Informative markings and symbols
This marking highlights essential information.
This marking refers to a user measure.
1.2 Conformity of the product
The EU declaration of conformity and the product’s technical specifications are integral parts of this document.
All of our products have been designed and manufactured with due consideration to the essential European standards, statutes and regulations.
Labkotec Oy has a certified ISO 9001 quality management system and ISO 14001 environmental management system.
1.3 Limitation of liability
Due to continuous product development, we reserve the right to change these operating instructions.
The manufacturer cannot be held liable for direct or indirect damage caused by neglecting the instructions provided in this manual or directives, standards, laws and regulations regarding the installation location.
The copyrights to this manual are owned by Labkotec Oy.
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2 Safety and the environment
2.1 General safety instructions
The plant owner is responsible for the planning, installation, commissioning, operation, maintenance and disassembly at the location.
Installation and commissioning of the device may be performed by a trained professional only.
Protection of operating personnel and the system is not ensured if the product is not used in accordance with its intended purpose.
Laws and regulations applicable to the usage or intended purpose of the device must be observed. The device has been approved for the intended purpose of use only. Neglecting these instructions will void any warranty and absolve the manufacturer from any liability.
The device must be de-energised when any installation work is carried out.
Appropriate tools and protective equipment must be used during installation. Other risks at the installation site must be taken into account as appropriate.
2.2 Intended use
The idSET-OTM Sensor is intended to be used in oil separators to indicate the thickness of the oil layer accumulated on the separator.
The sensor can be situated in zone 0 explosive atmospheres, but the attached to it central unit must be placed in a safe area.
A more specific description of the product’s operation, installation and use is provided later in this manual.
The device must be used in accordance with the instructions provided in this document. Other use is counter to the product’s purpose of use. Labkotec cannot be held liable for any damage caused by using the device in violation of its purpose of use.
2.3 Installation and commissioning
The sensor can be installed in potentially explosive atmospheres of zones 0, 1 and 2. In potentially explosive area installations, the national regulations and appropriate standards IEC/EN 60079-25 Intrinsically safe electrical systems “i” and/or IEC/EN 60079-14 Explosive atmospheres – Electrical installations design, selection and erection must all be followed..
If it is possible that static electricity can cause hazards in the measurement environment, equipotential bonding must be attended according to the regulations concerning potentially explosive atmospheres. Equipotential bonding is done by connecting all conductive parts to the same potential e.g. in a junction box. Equipotential bonding system must be grounded.
The instructions concerning the inspection and maintenance of Ex equipment contained in the standards IEC/EN 60079-17 and IEC/EN 60079-19 should be observed when executing service, inspection or repair procedures in potentially explosive atmospheres.
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2.4 Transport and storage
Check the packaging and its content for any possible damage.
Ensure that you have received all the ordered products and that they are as intended.
Keep the original package. Always store and transport the device in the original packaging.
Store the device in a clean and dry space. Observe the permitted storage temperatures. If the storage temperatures have not been presented separately, the products must be stored in conditions that are within the operating temperature range.
2.5 Repair
The device may not be repaired or modified without the manufacturer’s permission. If the device exhibits a fault, it must be delivered to the manufacturer and replaced with a new device or one repaired by the manufacturer.
2.6 Decommissioning and disposal
The device must be decommissioned and disposed of in compliance with local laws and regulations.
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3 Product description
3.1 Product operation
The idSET-OTM Sensor utilises capacitive measurement and can be connected to Labkotec Oy’s idSET-OTM central units.
The sensor provides the central unit with information on the oil layer accumulated on the oil separator.
The sensor is a category 1 device and can be installed in potentially explosive atmospheres in zoned areas 0, 1 and 2.
3.2 Dimensions of the idSET-OTM Sensor
A Counter electrode B Grounding electrode C Active measurement range
Figure 1. idSET-OTM Sensor dimensions DOC001875-EN-2
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4 Installation
4.1 General installation instructions
idSET-OTM Sensors can be installed in zone 0 explosive atmospheres. Do not remove the sensor markings from the cable or sensor frame.
After emptying, the sensor must always be filled with water at least up to the lower electrode to eliminate the possibility of a potential difference between the sensor and the environment.
Read Section General safety instructions before installation.
The sensor can be installed to hang from a wire, for example (see the following figure). The sensor can also be inserted into a specialised non-conductive installation pipe, which standardises the installation height.
When installing, please keep the suspension wire away from grounded conductive structures to eliminate any capacitance that may form a combustion risk. If this cannot be avoided, the wire must also be grounded.
Leave a sufficient length of the sensor or extension cable coiled inside the service well, for example, so that you can easily lift the sensor out for inspection and cleaning.
1
High fine adjustment
Wire lock for
rough height
2
adjustment (locking/unlocking
with Torx key
TX20)
Figure 2. idSET-OTM Sensor hanging
Figure 3. idSET-OTM Sensor installation supplies LMS-SAS6
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4.2 idSET-OTM sensor installation
The sensor must be installed when the liquid is at the standard level of the separator (bottom edge of the outlet pipe) and there is no oil in the separator. The installation height is correct when the counter electrode (1.1) barely touches the liquid (approx. 5 mm). The length of the suspension wire can be adjusted roughly to the right length according to the instructions in Figure 5 . Fine-tuning is possible by turning the rigging screw. The suspension heads with opposite threads enable fine-tuning when the sensor is hanging in place. If the sensor needs to be installed when there is oil in the separator, this must be taken into account in the installation height. The height is correct when the counter electrode length in the oil equals to 0.1 x the thickness of the oil layer. It is recommended to check the installation height later when there is no oil in the separator. The total surface level in the separator may not drop below the bottom edge of the outlet pipe. A drop in the total surface level shall be indicated to the sensor as a corresponding oil level up to 200 mm. If the surface drop level exceeds 200 mm, a low liquid level alarm shall be triggered. The sensor can measure oil layers up to 400 mm, when the oil density is between 765… 900 kg/m^3. The alarm engagement point can be determined with the idSET-OTM control unit. The sensor provides a notification if the separator’s total surface level is outside the measurement range (e.g. the sensor is above the surface or too deep in the liquid).
NOTE! When the sensor is lowered through the oil layer, lubrication oils in particular may stick to the sensor surface for several hours, resulting in the oil thickness indication being 1020 mm too high.
1 idSET-OTM oil layer sensor 1.1 Counter electrode 1.2 Grounding electrode
A Air B Oil C Water
Standard liquid level when L there is only water in the
separator. X Oil layer measurement range
(400 mm).
Figure 4. idSET-OTM sensor installation
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1.
Measure distance h from the bottom edge of the suspension hook (A) to the liquid surface (B).
2. Adjust the rigging screw to the middle position (C).
The wire length is h1 = h – 280 mm (from the top loop of
3. the rigging screw (A) to the black top surface of the sensor (D)).
Figure 5 . idSET-OTM sensor suspension wire installation
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5 Connections
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5.1 Example of connecting an idSET-OTM Sensor to an idSET-OTM control unit
Figure 6. Connecting an idSET-OTM Sensor to an idSET-OTM control unit
A
Hazard-free area
B
Hazardous area
Sensor connector to the idSET-OTM control unit
1
19 and 20 = sensor bus conductors 21 and 22 = sensor bus conductors
23 and 24 = sensor bus conductors
The sensor connection is a digital bus connection. The sensor always switches to the correct supply polarity, so the polarity of the conductors does not matter.
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2
Extension cable, e.g. protected, twisted-pair 2 x 0.5 mm2, maximum resistance
68 Ohm. Extra wire and shield must be cut and isolated carefully.
3
The example features an LCJ1-1 cable extension for a single sensor (idSET-OTM Sensor)
4
The example features an LCJ1-2 cable extension for two sensors (idSET-OTM Sensor and idOil-LIQ or idSET-OTM Sensor and idSET-SLU)
5
The example features an LCJ1-3 cable extension for three sensors (idSET-OTM Sensor, idOil-LIQ and idSET-SLU)
6
idSET-OTM Sensor
Product code 8541283 includes:
idSET-OTM Sensor LMS-SAS6 installation supplies
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6 Functional test
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Always check the correct operation of the alarm after the installation and after making the connections. You should also check the operation every time the separator is emptied or at least once every six months.
6.1 Checking the functioning of the idSET-OTM with the idSET-OTM control unit
Functional test:
1.
The operation of the sensor can be checked by lifting it in the air, and the
central unit will sound an alarm.
2.
Lowering the sensor back into the water will clear the alarm.
For a more detailed description of the operation of the central unit,
please refer to its user manual.
Clean the dirty sensor when checking its operation before putting it back in the separator.
If the sensor does not function as described, check the device settings from the control unit’s operation and installation manual or contact the representative of the manufacturer.
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7 Maintenance
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The sensor must always be cleaned when emptying the separator and at least once every six months in the context of maintenance inspections. You can clean the sensors with washing-up liquid and paper towel or a cleaning cloth, for example. Due to static charge, the paper or cloth must be moist and you should also avoid rubbing motions. To facilitate cleaning of the idSET-OTM Sensor, the counter electrode can be removed by loosening the three screws at the top.
Do not use corrosive substances to clean the sensor.
The idSET-OTM Sensor does not feature wearing or replaceable parts.
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8 Troubleshooting
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8.1 Troubleshooting the idSET-OTM Sensor with an idSET-OTM control unit
PROBLEM: Explanation:
Action:
EXPLOSION HAZARD! Observe the installation and maintenance instructions for explosive atmospheres! The measuring device must be Exi classified if the sensor is in an explosive area.
Remember to set the idSET-OTM control unit in maintenance mode so that the alarms during the maintenance measures are recorded in the inspection log instead of the alarm log. For detailed instructions on how to set the device in maintenance mode, please refer to the central unit’s operation and installation manual.
The sensor cable wires are not numbered because the voltage polarity (+ or -) makes no difference.
Fault alarm is on.
The sensor cable is short-circuited, cut or disconnected from the connector. The sensor could also be damaged.
1.
Measure voltage separately from that sensor’s sensor connectors. Check the correct voltage value in the manual of the central unit.
2.
If the voltage is correct, measure the current drawn by the sensor as follows:
2.1 Disconnect the sensor wire from the central unit’s left-hand side sensor connector.
2.2 Connect an mA meter as shown in the figure below.
2.3 The SENSOR connectors hold 13 sensors. The measured current is the total current drawn by the sensors. The current values of the different sensor types can be found in the technical data of the sensor manuals while the current of idOil-OTM Sensor is 9.011 mA.
2.4 Reconnect the disconnected wire after the measurement.
The measurement can also be carried out on the separator end by opening the cable extension.
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A Ex-classified mA current meter B OTM central unit’s sensor connectors 1920 C idOil sensor(s)
Figure 7 . Sensor current measurement; idSET-OTM control unit – idSET-OTM Sensor
If problems occur, contact Labkotec Oy’s service department.
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9 Technical specifications idSET-OTM sensor
TECHNICAL SPECIFICATIONS idSET-OTM oil layer sensor
Operating principle
Capacitive
Enclosure
Enclosure class: IP 68 Materials: PP, POM, AISI 316, PUR, NBR
Weight
1,6 kg (incl. 5 m cable)
Temperature
Operation: 0ºC…+60ºC Environment: -30ºC…+60ºC
Supply voltage
7.5…15 V DC
Cable
2 x 0.75 mm2 PUR, Ø5 mm
EMC
IEC/EN 61000-6-2 IEC/EN 61000-6-3
Ex classification
II 1 G Ex and IIA T4 Ga
Special terms (X)
Ta = -30°C…+60°C
Exi connection values
Ui = 15 V, Ii = 100 mA, Pi = 550 mW Ci < 4.3 nF, Li < 1.8 mH
Manufacturing year:
xxxxxxx x xxx xx YY x
Please see the serial number on the type plate.
where YY = manufacturing year (e.g. 21 = 2021)
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10 EX certificates
EX certificates ATEX IECEx UKEX
EESF 21 ATEX 002X IECEx EESF 21.002X CML 21UKEX21348X
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11 Appendices
11.1 APPENDIX EU Declaration of Conformity
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11.2 APPENDIX UK Declaration of Conformity
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Documents / Resources
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Labkotec idSET-OTM Oil Layer Sensor [pdf] User Guide idSET-OTM Oil Layer Sensor, idSET-OTM, Oil Layer Sensor, Layer Sensor, Sensor |