deZem Harvy2 User Manual

Iot sensor, lorawan sensor

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IoT Sensor Harvy2

User Manual and technical data of the

Harvy2 LoRaWAN sensor

Version 1.0.2 - en

April 2024

deZem GmbH

Wilmersdorfer Str. 60 · 10627 Berlin

Telephone: +49 30 31 800 730

Fax: +49 30 31 800 731

contact@dezem.de · www.dezem.de

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Page 1 IoT Sensor Harvy2 User Manual and technical data of the Harvy2 LoRaWAN sensor deZem GmbH © 2024 deZem GmbH Wilmersdorfer Str. 60 · 10627 Berlin Telephone: +49 30 31 800 730 Version 1.0.2 - en Fax: +49 30 31 800 731 April 2024 contact@dezem.de ·...
Page 2: Table Of Contents
1. General information ..........................4 1.1 Safety instructions ........................4 1.2 Intended use ..........................4 1.3 Disposal ............................5 1.4 Support ............................5 2 Functional description..........................6 2.1 What is the Harvy2 used for?......................6 2.2 Product features ...........................6 2.3 Applications ..........................7 2.3.1 Metering RMS currents .......................8 2.3.2 Determination of active power and other values from the three-phase network ....8...
Page 3: Quick Start Guide
Harvy2 Manual Quick Start Guide The Quick Start Guide will be updated in due course. Until then, please note the following chapters: Installation of hardware components Configuration Firmware updates (integrated software) Page 3 of 26...
Page 4: General Information
- protection class III. Shocks or impacts must be avoided. • If the housing or cable are damaged, please contact deZem GmbH and do not install the device. • deZem clamp-on current transformers must not be connected to uninsulated or damaged lines.
Page 5: Disposal
1.4 Support Do you have any further questions about setting up and operating the Harvy2? The deZem team will be happy to answer them for you. Call us at: +49 30 3180 0730 or write to us at harvy-support@dezem.de.
Page 6: Functional Description
RMS currents on all electrical main and sub-distributions or directly on machines by using deZem clamp-on current transformers. When additionally using a voltage transformer on the fourth of inputs, the sensor can also determine the relevant parametres for each phase of the three-phase current, i.e.
Page 7: Applications
2.3 Applications The Harvy2 is particularly suitable for two areas of application: For measuring RMS currents with clamp-on current transformers, and • When using a voltage transformer, additionally for determining active power, power factor, reactive •...
Page 8: Metering Rms Currents
In order to use this option, a voltage transformer is connected to channel 4 of the Harvy2. Channels 1, 2 and 3 can be used for clamp-on current transformers that are connected to phases L1, L2 and L3. The phases and...
Page 9: Installation Of The Hardware Components
When used for the first time, the battery-free Harvy2 may be discharged after a long break in operation and might not work. All you need is a USB connection, for example with a laptop, to charge it within a few seconds (recommended).
Page 10: Installation With Clamp-On Current Transformers And Voltage Transformer
WARNING NEVER connect a current transformer to a conductor if it is not connected to the Harvy2 or another terminal device. Otherwise, high voltages can build up at the transformer output. Additional insulation must be attached between the conductor and the clamp-on current...
Page 11 Harvy2 Manual You can see the orientation of the clamp-on current transformers on the inside of the window of the respective transformer. The primary winding connections are labeled with the capital letters “K” and “L” or “P1” and “P2”. The orientation must be such that the “energy flow direction” runs from K to L or from P1 to P2.
Page 12: Configuration
(e.g. deZem IoT platform, i.e. deZem.io), as well as setting up the new metering point in a suitable software, e.g. deZemAd. If desired, we can take care of the registration on the deZem IoT platform as well as the setup in deZemAd and can deliver the device preconfigured.
Page 13 If you are using a voltage transformer, set the transformer factor under “IN 4 Voltage Transformer Factor” so that the output is correct: For deZem voltage transformers with a Europlug, the transformer factor is 15.97. For deZem DIN rail voltage transformers, the factor is 15.19.
Page 14 USB-C cable. Otherwise, follow the next steps first and then disconnect Harvy2 from the web application as described. If you want to register the Harvy2 at a LoRaWAN server, you will need the DevEUI, the JoinEUI and the AppKey of the sensor. You will also need the current decoder.
Page 15 For the set-up of the metering point in deZemAd, we refer to the corresponding manual. The configuration interface, which can be found at https://harvy2.dezem.io/, is being expanded and simplified continuously. As a result, the images shown here may differ slightly. However, all relevant steps should be intuitively and easily recognisable in the configuration interface.
Page 16: Firmware Updates
Harvy2 Manual 5 Firmware updates When the Harvy2 is delivered, the current firmware version is already installed. If a later update of the firmware (integrated software) is required, the latest version will automatically be made available via the Harvy2 web application. You can install the update on the sensor via USB-C as described below.
Page 17: Technical Data
Harvy2 Manual 6 Technical data 6.1 LED signals LED signal pattern The signal displays Meaning Green LED: flashes 4x System voltage > 3400 mV LoRa connection active + measurement active Green LED: flashes 3x System voltage > 2800 mV LoRa connection active +...
Page 18 Harvy2 Manual 50 bytes Maximum payload size All channels IN1...4 enabled inclusive 3 Phase Measurement (with voltage transformer) 12 bytes Minimum payload size Only vsys_V and temp_C enabled Group Variable (may change, Data type Unit Value Value Comment Depends on...
Page 19 Harvy2 Manual Group Variable (may change, Data type Unit Value Value Comment Depends on Meaning bytes Byte Subgroup not finalized) (config) index in2_dc_raw_A dc_en in2_freq freq_en scaled_mode in2_coeff voltage_mode in3_ac_raw_A ac_en in3_dc_raw_A dc_en in3_freq freq_en scaled_mode in3_coeff voltage_mode in4_ac_raw_A ac_en...
Page 20 Harvy2 Manual Group Variable (may change, Data type Unit Value Value Comment Depends on Meaning bytes Byte Subgroup not finalized) (config) index ac_en AND in1_ac_A F64 (JS decoder) scaled_mode dc_en AND in1_dc_A F64 (JS decoder) scaled_mode ac_en AND in2_ac_A F64 (JS decoder)
Page 21: Faqs
That is, activate recovery mode and gently press and hold the reset button on the sensor with a blunt object until the update starts. Although the Harvy2 is connected to the web application, I do not receive a DevEUI for the connection to the LoRaWAN server, why is that? Log out via “Disconnect”...
Page 22 Do all channels have to be used for the Harvy2 to operate "energy harvesting"? Approx. 1 A on any of the measured wires is sufficient to supply the Harvy2 with enough energy for operation, i.e. approx. 200 W. The T80/26.6 folding current transformer from deZem is best suited for harvesting with very low currents.
Page 23 The application does currently not work with Firefox and Safari and on iOS. I have installed the Harvy2, but the data transfer rate is slow. How can I fix this? Reboot the sensor at the installation site or wait a few hours.
Page 24 Harvy2 Manual This is an error on the level of the LoRaWAN server. Set up the device again. In specific cases (especially when updating prototypes), it may occur that the counters for sending LoRaWAN packets within the sensor and on the LoRaWAN server no longer match. One reason is that an update can lead to all LoRaWAN parameters in the sensor, including the counter, being reset, while the server remains unchanged.
Page 25: Appendix
Appendix I. Updates to firmware versions older than version 1.0.0 If the version currently installed on the Harvy2 is older than version 1.0.0, e.g. for prototypes, the following instructions apply for the installation of updates on the Harvy2. Depending on the operating system, it may be necessary to install the USB driver “CP210x Universal Windows Driver”...
Page 26 C cable. Note that the decoder changed between prototype and version 1.0.0. If you have registered your Harvy2 as a prototype on a LoRaWAN server, you may need to update the decoder information there. The new decoder is can be obtained...