Thermokon WK02+ User manual

WK02+ 24V RS485 Modbus
Condensation detector with temperature and humidity
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: [phone] fax: -400 www.thermokon.com· [e-mail]
WK02+_LRW_Datasheet_en.docx © 2022
Datasheet
Subject to technical alteration
Issue date: 26.07.2022 • A121
»APPLICATION
Condensation sensor with LoRaWAN® interface as well as LED signal and a relay output to prevent condensation on chilled surfaces. For control
and monitoring applications or connection to cooling valves to stop the flow of chilled water flow upon condensation. The 'ext.' model uses a 2m
remote sensor for a more flexible installation. In radio-shielded mounting locations, an optional external antenna can be used to optimize the radio
link between the device and the gateway.
»TYPES AVAILABLE
Condensation sensor + humidity + temperature – active 2x 0..10 VV LRW
•WK02+ ext. LRW 24V L2000
•WK02+ ext. LRW 230V L2000
»SECURITY ADVICE – CAUTION
The installation and assembly of electrical equipment should only be performed by authorized personnel.
The product should only be used for the intended application. Unauthorised modifications are prohibited! The product must not be used
in relation with any equipment that in case of a failure may threaten, directly or indirectly, human health or life or result
in danger to
human beings, animals or assets. Ensure all power is disconnected before installing. Do not connect to live/operating equipment.
Please comply with
•Local laws, health & safety regulations, technical standards and regulations
•Condition of the device at the time of installation, to ensure safe installation
•This data sheet and installation manual
»PRODUCT TESTING AND CERTIFICATION
Declaration of conformity
The declaration of conformity of the products can be found on our website https://www.thermokon.de/
»NOTES ON DISPOSAL
As a component of a large-scale fixed installation, Thermokon products are intended to be used permanently as part of a building or a
structure at a pre-defined and dedicated location, hence the Waste Electrical and Electronic Act (WEEE) is not applicable. However,
most of the products may contain valuable materials that should be recycled and not disposed of as domestic waste.
Please note the
relevant regulations for local disposal.

Page 2 / 4 Issue date: 26.07.2022
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: [phone] fax: -400 www.thermokon.com· [e-mail]
WK02+_LRW_Datasheet_en.docx © 2022
»ANWENDERHINWEISE FÜR FEUCHTEFÜHLER
At regular environmental condition, it is recommended to calibrate the sensor annually to check the compliance with the accuracy
required in the application.
The following conditions can damage the sensor element or lead in long therm
to loss of the specified
accuracy:
•Mechanical stress
•Contamination (e.g. dust / fingerprints)
•Aggressive chemicals
•Ambient conditions (e.g. condensation on measuring element)
Do not touch the sensor
elements!
Re-calibration or exchange of the sensor element are not subject of the general warranty.
»TECHNICAL DATA
Measuring values Humidity, temperature, conductivity
Output switch contact NO contact, max. 250 V / 3,0 A (resistive, floating)
Power supply 15..24 V = (±10%) or 24 V ~ (±10%) SELV
Power consumption max. 2,3 W (24 V =) | max. 4,3 VA (24 V ~)
Output signal range temp
(Scaling analog output)
0..+50 °C (default setting), optionally configurable via Thermokon USEapp
Measuring range humidity 0..100% rH non-condensing
Accuracy temperature ±0,5 K (typ. at 21 °C, within default measuring range)
Accuracy humidity ±2% between 10..90% rH (typ. at 21 °C)
Display LED green – power supply OK; LED red – condensation
Enclosure enclosure USE-L, PC, pure white, cover PC, transparent, with removable cable entry
Protection IP65 according to EN 60529
Cable entry Flextherm M20 for wire Ø=4,5..9 mm incl. seal insert for double cable entry for wire max Ø=6 mm and M25, for
wire max. Ø=7 mm, seal insert
Connection electrical removable plug-in terminal, max. 2,5 mm², sensor wire white 2 m (default), for other lengths please request
Ambient condition 0..+50 °C, max. 85% rH short term condensation
Delivery content 1x syringe with terminal contact fluid, incl. mounting base enclosure USE-L pure white
Configuration Thermokon USEapp, LoRaWAN® Downlink, Jumper
Notes other cable lengths on request
»
LoRaWAN®
Radio technology LoRaWAN®
LoRaWAN version 1.0.2
Device class Class A
Frequency EU868 (863-870 MHz)
Max. transmission power +14 dBm (25 mW)
Receiver sensitivity -137 dBm
Antenna Internal send- / receiver antenna, external antenna available on request
LoRaWAN Features Over the Air Activation (OTAA), Adaptive Data Rate (ADR)
Data transmission
(configurable)
Configurable transmission interval, factory default value 5 min
»INFORMATION ABOUT LORAWAN SPECIFICATION
The Thermokon LoRaWAN specification can be downloaded from our website.

Issue date: 26.07.2022 Page 3 / 4
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: [phone] fax: -400 www.thermokon.com· [e-mail]
WK02+_LRW_Datasheet_en.docx © 2022
»CONFIGURATION
The Thermokon Bluetooth-Dongle (Item-No. 668262) is required for Communication between
USEapp and USE-M/USE-L LRW-products. Commercial bluetooth dongles are not compatible.
Application-specific reconfiguration of the devices can be carried out using the Thermokon USEapp.
The configuration is carried out in the voltage-supplied state.
The configuration-app and the app description can be found on the website www.thermokon.de
Configuration- Button
1. Connect the sensor with the power supply according to wiring diagram
2. Plug in the bluetooth dongle
3. Press the button to start configuration mode.
4. Configure the sensor using the USEapp on a mobile device.
5. Disconnect the bluetooth connection.
6. Remove the bluetooth dongle off the sensor.
7. Press the button to stop configuration mode.
8. Configuration values are saved and the device is ready for use.
»USER ADVICE
After a certain time, dirt in the air can collect on the filter and then adversely affect the operation of the sensor. Under normal ambient condition an
annual maintenance is recommended. Rinse the filter after cleaning with distilled water and dry it using clean oil-free air or nitrogen. Extremely
contaminated filters should be replaced. At extreme ambient conditions, e.g. corrosive gases, the humidity sensor may have to be changed.
The bluetooth dongle snaps in the connector, when removing the bluetooth dongle hold the board down to
prevent pulling out the board.
»MOUNTING ADVICE
For detection of water condensation, the sensor must be mounted on the coldest point of the
medium. Please ensure a good thermal contact to the measuring medium. A thermal
connection between sensor und medium with heat conducting paste is necessary. Mounting
effects by means of included cable ties (binders). Mounting can be made directly on a pipeline.
The sensor surface may be damaged by an aggressive and solvent-contaminated ambient.
Always keep the sensor clean and free of dust and dirt. A dirt film may affect the sensor's
switching characteristic.
Note the mounting side of the metal strip (see the figure A).
In order to avoid dust deposits, the sensor should be installed at the bottom of the pipe if
possible (see the figure B).

Page 4 / 4 Issue date: 26.07.2022
Thermokon Sensortechnik GmbH, Platanenweg 1, 35756 Mittenaar, Germany · tel: [phone] fax: -400 www.thermokon.com· [e-mail]
WK02+_LRW_Datasheet_en.docx © 2022
»CONNECTION PLAN
The relay is energized in the operating state (relays NO and C connected). Upon dew permeation or when the operating voltage is switched-off,
the relay falls off.
»DIMENSIONS (MM)
»ACCESSORIES (INCLUDED IN DELIVERY)
Syringe with terminal contact fluid Item No. 102308
Cable ties 140x3,6 mm Item No. 007610
Mounting kit universal Item No. 698511
• Cover screw + screw cover• 2 Rawlplugs • 2 Screws (countersunk head) • 2 Screws (rounded head)
»ACCESSORIES (OPTIONAL)
Cable entry M20 USE white, sealing insert 2x Ø=6 mm (PU 10 pcs) Item No. 641319
Cable entry M20 USE white, sealing insert 2x Ø=7 mm (PU 10 pcs) Item No. 641333
Bluetooth dongle Item No. 668262
Relay | NC ◀
Relay | C
▶
Relay | NO
◀
microUSB
Sensitivity condensation sensor
+
= more sensible
–
= less sensible
LED´s
GND UB+