EOL Zenith

EOL Zenith data logger without lid


The manufacture of the EOL Zenith has been discontinued. We will continue to accept orders for the EOL Zenith data logger until 30/06/2020 and provide continuous technical support for the EOL Zenith until 30/06/2025. Replacement logger: Orbit 360. For more information about this announcement see below.

Case Study 2


Case Study 6


Case Study 7



Tell us what you need by filling in the form below and we will get back to you.

With a significant number of Orbit 360 data loggers now in the market, and with most of our customers already transitioned from the EOL Zenith to the Orbit 360, it is now time for the rest of our customers to benefit from the well-integrated improvements in the Orbit 360.

We have therefore decided to discontinue the manufacture of the EOL Zenith data logger. We will continue to accept orders for the EOL Zenith data logger until 30/06/2020 and provide continuous technical support for the EOL Zenith until 30/06/2025.

The Orbit 360 models are designed so our customers can easily make the transition from the EOL Zenith to the Orbit 360 product range whilst immediately benefitting from all the new features in the Orbit 360 product range as well as our new fleet management software, Atlas.

For more information about this announcement please contact support@kintech-engineering.com

The EOL Zenith data logger collects data in compliance with IEC61400-12 for high-quality wind and solar resource assessment when maximum performance, reliability, and ease of use is a must. It is the perfect combination of data logger technology coupled with cutting-edge remote data collection and management software.

The EOL Zenith is designed for optimal performance in any climate – from the bitter colds of northern Norway to the desert heat of Egypt. Read our related case studies (Case Study 7 or Case Study 2).

This exceptionally versatile performance is thanks to the carefully designed electronics, robust and reliable components, and low power consumption of the data logger – a feature that remains unique to the EOL Zenith and of crucial importance when operating in remote areas. Specific design features include:

  • 1Hz sampling rate (complying with IEC61400-12)
  • Advanced sensor error diagnosis
  • Live real-time data (bi-directional communication)
  • GPS time stamp and synchronization
  • Automatic file download
  • Multiple data delivery and forward options
  • 10 min. averaging interval (user selectable)
  • Data encryption and 2 level password protection
  • No interface cards required
  • No programming required
  • SCADA/Modbus capability (option)
  • Ultrasonic capability (option)
  • Met mast management tool (EOL Manager) that helps keep track of all your sites

The EOL Zenith data logger offers a wide range of possibilities and is the core component in wind resource measure­ment campaigns. By default, the data logger comes equipped with GSM/GPRS communication capabilities. Due to its very low energy consumption, a 10W solar panel is sufficient for standard operation (dependent upon hours of sunlight, latitude, etc.)

The software and remote monitoring system for the EOL Zenith data logger ensures reliable and easy access to wind data and logger status, and forms an integral part of the data acquisition system.

Download data, collect real-time values, refine logger settings remotely and keep all your wind data organized.

  • Dashboard with site-by-site status, with direct access to site coordinates via Google Earth
  • Automatic data download from unlimited number of sites
  • Advanced sensor error diagnosis
  • User selectable output format incl. EPE (Brazil) and MGM (Turkey)
  • Upload new logger settings OTA
  • Live real-time data (bi-directional communication)
  • Multiple data delivery and forward options
  • User configurable password protection

EOL Manager includes advanced graphics for more accurate wind data trouble-shooting as well as enhanced control of multiple wind assessment sites with automatic and real time connectivity.

In short EOL Manager offers ‘at a glance’ status of all your data loggers in the field with easy identification of sensor faults. It also allows for configuration of the data loggers, download frequency etc.

If you are using the SD memory card that was supplied together with the data logger, the SD card is already formatted.

In case you want to re-format a SD card please follow these steps:

  1. Turn off the data logger
  2. Insert the SD card you want to format into the data logger
  3. Turn the data logger on
  4. Wait for at least 12 minutes

The SD card is now formatted correctly.

Yes, you can use any SD memory card (with a maximum capacity of 2GB). However, not all SD memory cards have the same quality. We strongly recommend using the industrial grade SD memory card that is supplied together with the data logger.

Please make sure that the SD card is correctly formatted before use.

The EOL Manager is used to prepare the configuration file for the EOL Zenith data logger. The .sit file (configuration file) is then uploaded to the data logger.

EOL Manager downloads the encrypted .log file from the data logger. The .log file contains all the RAW data (the pulses and Hz stored from all the sensors connected to the data logger)

EOL Manager then automatically converts the .log file into a .wnd file and .txt file using the active logger configuration file (also stored on your PC)

We offer two alternative satellite solutions, Iridium and BGAN. Either solution enables you to connect with data loggers installed in remote locations without GSM coverage while maintaining full compatibility with the other features and accessories of our data loggers, including:

  • Live data connections
  • Remote modifications to logger settings incl. firmware upgrades
  • Automatic data download
  • GPS coordinates
  • Windfarm Monitoring Module

Click here to read more about the “Iridium Satellite Module”

Click here to read more about the “BGAN Satellite Module”

We recommend using a flotation (back-up) sealed lead-acid battery (12VDC). This kind of battery has no maintenance and can be transported in any orientation. If you are performing wind measurement and are using an internet / GSM connection to your data logger, we recommend using a 24Ah battery. This gives autonomy of approximately 1 month without the battery being recharged.

To test that the solar power supply system has been installed and performs properly you need a multimeter set to “Read Current” mode.

Step 1

To begin with you should check if the output from the solar panel is correct. You should do this on a sunny day (Please connect the multimeter as shown in the drawing below).

Step 2

Now check that the regulator is charging the battery. There are lEDs on the solar regulator helping you to indicate if the regulator is charging the battery. But to be sure you should check with the multimeter (see drawing below)

Figure 1.1B

In addition to dimensioning the solar power supply system correctly, it is important to position the solar panels appropriately for maximum electricity production.

In addition to dimensioning the solar power supply system correctly, it is important to orientate the solar panels appropriately for maximizing the energy production during the season with less sun energy.

In general the solar panel should be facing GEOGRAPHICAL SOUTH in the Northern hemisphere and GEOGRAPHICAL NORTH in the Southern hemisphere. And as a rule of thumb the inclination of the solar panel should be the latitude of the site where you are installing the solar panel -10°.

E.g. For an installation in Germany, close to Frankfurt (with latitude 50° N) you should orientate the solar panel towards SOUTH and with an inclination of 40° with respect to horizontal.

For sites in the North (e.g. Scandinavia), or where there may be very little sunlight during certain periods of the year, an individual solar radiation calculation should be carried out. You can contact our technical support for help on this.

Tropical and Equatorial sites

In inter-tropical latitudes the sun can be located either North or South. In the equator, for example, the met mast structure shadow is projected to the South for 6 months and to the North for the other 6 months. This of course lowers the radiation on the solar panel and we therefore recommend installing two separate solar panels.

Installing two solar panels

If you are going to install two separate solar panels, we recommend the following configuration (see images below). Both panels are to be installed in booms parallels to the West-East Earth axis, with one solar panel pointed towards the North (and tilted approx. 10°) and the other one pointed towards the South (and tilted approx. 10°). The charging efficiency is increased by using independent solar chargers for each solar panel.

Usually solar power systems for the EOL Zenith consist of a solar panel, a charge controller and a battery.


Always connect the battery terminals directly to the BAT + and – on the data logger. Do not connect the LOAD+ and LOAD- to the data logger. The reason we recommend this is to avoid the regulator to switch off its outputs when the battery drops below a certain cutoff limit for the regulator. Keep in mind that the data logger can work with 5V. See drawing below.

To ground the EOL Zenith®, connect one end of the copper ground wire (usually yellow-green color) to the data logger GND terminal and the other end to an independent grounding spike.

If the enclosure is metallic you must also connect the enclosure to the ground wire, to do so, all metallic enclosures have a connection screw terminal with the ground symbol on it.

Click here to download our “how to ground” guide

Anemometers:10 anemometers (synchr. generator, push-pull, reed contact or hall effect)
Wind vanes:2 + 5 analog (potentiometer) and 2 digital
Analog:13 inputs (Temp., hum., pressure, radiation, up flow wind etc…)
SCADA/Modbus capability:Option (compatible with Enercon, Suzlon, Vestas, GE, Gamesa, Acciona)
Data delivery:Multiple options incl. automatic data forwarding
Satellite communication:Option
Live real-time data:Yes pr. default
Integration time:1 second (according to IEC 61400-12)
Recording interval:10 minutes (default) user selectable
Time accuracy and synchronization:GPS precision, always sync.
Recorded values / channel:10 minutes: average, standard dev. (config), min (config), max (config)
Turbulence and gusts:TI 30 sec. (ane channels 1 and 2), St. dev. 10 min., max and min gust
Geographical coordinates:Records the site coordinates according to the GPS
Speed resolution:16 bits (< 0.01 m/s)
Gust Precision:0.05 m/s
Standard deviation precision:0.01
Wind vane resolution:10 bits (0.35º)
Analog resolution:12 bit (1.22 mV)
Voltage:5-30 V DC Reverse polarity protection. Solar power supply available.
Modem power:User configurable and smart management by logger
Memory card:SD/MMC 1GB
Storage period:>5 years
Digital outputs:3 outputs
Warranty:2 years against manufacturing defects and material flaws
Standard:IEC 61400.12.1
Download options:Telemetry, MMC reading
Data encryption:All data is encrypted and password protected (configurable)
Output file format:*.txt, MS-Excel and configurable data columns
Raw data, decoded data and download report
Digital signature:By GPS. For data modification prevention
Communication system:CSD, SMS, Internet (GPRS), CDMA, Satellite and RS232 cable.
Connection register:Remote connections + keyboard access with date and time of the event
Antennas:GSM & GPS
Terminals:Removable Plugs
MODEM:GSM/GPRS/GPS quad band internal modem
Screen:LCD w/ 64×128 resolution
Keyboard:6 buttons keyboard
Communication slots:2 serial ports
Memory slots:2 memory slots
Sensor configuration:Telemetry, by inserting MMC memory into logger or by keyboard
Firmware configuration:OTA configuration and by MMC insertion
Display activity register:Every time a technician press a key and turns on the display, the event is registered and recorded in the MMC memory with time and date

Request a callback

Fill in the form and we will call you back as soon as possible.

Enter your keyword