Description
The Dynatest Light Weight Deflectometer (LWD) is a portable version of the Falling Weight Deflectometer (FWD). The Light Weight Deflectometer uses a load cell and geophones with the same accuracy as the Falling Weight Deflectometer. The LWD can be used to test thin asphaltic pavements, recycled materials bound with foamed bitumen, and directly test the unbound subbase and subgrade. The output from the LWD can be used to calculate the strength of multiple pavement layers. The Light Weight Deflectometer meets the ASTM 2583 for determining the modulus and compaction of the material.
Specifications
- Precision load cell to measure the impact load-time history and peak magnitude
- 22 lbs (10 kg) standard weight or optional 11 lbs (5 kg), 33 lbs (15 kg) or 44 lbs (20 kg) drop weight setups applying up to 3,300 lbf (15 kN) impact force
- Center seismic transducer (geophone) to measure the deflection time history (by single integration of velocity) and peak value on materials through a hole in the loading plate
- Sensor locking plug feature optionally allows center geophone to measure plate deflection
- Dual Plate System (DPS) for quick and easy switching between the 11.8 in (300 mm) and 5.9 in (150 mm) loading plate diameter
- A 3.9 in (100 mm) plate diameter
- The lever to ensure that the geophone is centered and seated correctly
- Enhanced Bluetooth module with high stability and extended range, allows data collection with your phone using the cross-platform LWD Mobile app on Android, iOS (Apple), and Windows
- Up to 50 hours idle time per charge
- Dust and splash-proof (IP56) electronics for safe outdoor use
- Lightweight with total basic configuration weight of 48 lbs (22 kg)
- GPS capability through phone