Falling weight deflectometer INPECTOR-3
Portable falling weight deflectometer (FWD) INSPECTOR-3 is a portable non-destructive device to estimate the bearing capacity of the ground either with or without the binding material. The device may be used in pavement testing for road construction, building etc.
INSPECTOR-3 enables to evaluate:
- ground elastic modulus
- maximum deformation
- elastic deflection
- deformation time
INSPECTOR-3 uses the falling weight energy for ground deformation. The ground dynamic elastic modulus and compaction are calculated from the acceleration sensor signals by the microprocessor. The measurement results appear on the backlighted LCD.
The results of up to 200 measured series are saved in the device inner memory. These data maybe transferred to PC by BLUETOOTH connection or USB port. In addition to the measurement results, the date and time, ambient air temperature and if equipped with separate GPS also the test point co-ordinates will be written into the protocol.
The functional parts of the device are incorporated into one united body from aluminium. For transport the device is placed into a waterproof wooden trunk.
INSPECTOR-3 comparison with INSPECTOR-2
| Falling weight | 10 kg |
| Loading force | 23 kN |
| Falling weight drop height | 800 mm |
| Loading plate diameters | 140 and 200 mm |
| E-modulus range | 5 - 900 MPa |
| Operation voltage | 18 V (two 9 V ALKALINE batteries) |
| Temperature range | -10 °C to +40 °C |
| Protection level | IP65 |
| Weight without the trunk | 16 kg |
| Dimensions | 1150 x 110 x 110 mm |