At present, the most accepted method for evaluating the safety and stability of trees is the pulling test. It involves applying a bending load on the trunk via a cable attached to the tree. The method can be used either to assess the uprooting stability of the tree, or to establish the risk of trunk breakage.
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.
- Attach the cable to the trunk in the crown of the tree, as high as possible.
- Choose an anchor point in the appropriate direction, about 10 to 15 m from 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 box, 9V rechargeable battery
- Battery charger
- Central unit
- Force meter and display
- Serial cables connecting sensors and central unit
- Software on CD
- User's manual
- Pulling device (optional)
Pulling test - elasto (extension package)
- 2 elastometers in quick mounting house
- Dual elastometer box
- Screw and screwdriver
- Batteries and battery charger
- Serial cables connecting dual elastometer box and central unit
Cable and winch
Cable length 20 m
Winch 1.6 or 3.2 metric ton
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
Measurement range ±2 degrees
Resolution 0.001 degree
Temperature compensated yes
Sampling rate 10 Hz
Power source 9V battery
Weather proof, IP65 yes, IP65
Dimensions 30x30x270 mm
Span 250 mm
Sampling rate 1 Hz
Resolution 0.3 μm
Power source 2 pcs. of 9 V batteries
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