HJC黄金城

-       The dynamic pulling test

-       Requires wind gusts at least 25 km/h

-        Uses real wind instead of cable

-       As the tree is measured in real windy situation, the effect of the surroundings, the actual crown and soil conditions are included

The DynaTree system should be used on days with at least 25 km/h (15 mph) wind gust velocities. Setting up the measurement involves the following steps.

1. Assemble the anemometer tower in the vicinity of the tree(s) to be assessed. Attach the anemometer on the top, and erect the tower. Wind velocity readings are sent to, and data is collected at the instrument box located at the bottom of the tower.
2. Start recording data by pressing the START button located in the instrument box.
3. Mount the inclinometer on the root collar of the tree to be assessed.
4. Mount the elastometers onto the trunk of the tree to be assessed. Connect them to the central unit.
5. Start recording data by pressing the START buttons located on the side of the instrument box.
6. Repeat the previous 3 steps if you have more inclinometers and/or elastometers want to assess multiple trees.
7. Record data for at least 3 hours (the longer the better).
8. After the recordings are finished, transfer the acquired data to a PC by removing the internal SD card or by switching the instruments to Wi-Fi mode.
9. Load the data into the DynaTree evalsuation software and calculate the safety factor.