Pulling Test
The Pulling test method can be used to estimate the uprooting force by measuring the inclination at the bottom of the trunk during applying a bending load to the trunk.
- The most accepted method for evaluating the safety and stability of tree roots
- Estimate the risk of uprooting using inclinometers
- Estimate the risk of trunk breakage using elastometers
Remark: there are overlaps among the equipments needed for DynaRoot and Pulling test. If you order both of them at the same time you can ask for a switchable Dual Elastometer Unit and High Precision Inclination and Deformation Recorders.
Make sure you follow all the safety instructions throughout the test!
Attach the cable to the trunk in the crown of the tree, between half and 2/3 of the total height of the tree.
Choose an anchor point which has a distance of at least twice the height of the rope on the tree.
Set up the winch and ropes according to the guide.
Install the load cell.
Install the inclinometer sensors.
Install the extensiometer sensors.
Connect all sensors to the central unit.
Switch on the units, and press “Tara” on the load cell.
Start the Pulling Test software.
Start measurement by loading the cable slowly and evenly using the winch.
Pulling test - inclino
Inclinometer (1 or 2 pcs.)
Base plate with ball head
Battery charger
Central unit
Force meter and display
Serial cables connecting sensors and central unit
Software on USB Pendrive
User's manual
Pulling device (optional)
Pulling test - elasto (extension package)
2 elastometers in quick mounting house
Screw and screwdriver
Batteries and battery charger
Serial cables connecting dual elastometer box and central unit
Specification |
Details |
|---|---|
Cable and winch |
|
Cable length |
20 m |
Winch |
1.6 or 3.2 metric ton |
Load cell |
|
Calibrated |
yes |
Cable-mounted |
yes |
Capacity |
5 T |
External display |
Rinstrum |
Connection to central unit |
RS232 |
Sampling rate |
1 Hz |
Hex key |
6mm |
Powered by |
4 AA size rechargeable batteries |
Inclinometers |
|
Sensor |
ST-015 |
Measurement range |
±2 degrees |
Resolution |
0.001 degree |
Temperature compensated |
yes |
Sampling rate |
7 Hz |
Power source |
9V battery |
Weather proof, IP65 |
yes, IP65 |
Extensiometers |
|
Type |
LVDT |
Dimensions |
30x30x270 mm |
Span |
250 mm |
Sampling rate |
1 Hz |
Resolution |
0.3 μm |
Power source |
2 pcs. of 9 V batteries |
