The PDA-DLT monitors  high strain dynamic load tests on drilled shafts and bored piles using a drop weight system.

  • Dynamic load testing and monitoring of drilled concrete shafts
  • Up to 16 channels of data acquisition available with eight WIFI boxes and any combination of strains and accelerometers
  • Complete with CAPWAP®, GRLWEAP, and iCAP® software
  • Field-to-office data transmission with SiteLink® Technology 

Have a technical question? Ask our team of engineers.

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  • Description
  • Technical Specifications
  • Reference Materials
  • Downloads

The PDA-DLT was designed specifically for quality assurance testing of drilled shafts and bored piles. The PDA-DLT allows for multiple configurations of force measurement. The system acquires data from accelerometers and strain transducers attached to a pile or shaft so that High Strain Dynamic Tests (ASTM D4945) may be performed. The tests require the impact of a suitable drop weight.

The PDA-DLT evaluates:

  • Bearing Capacity
  • Structural Integrity
  • Foundation Stresses


The PDA-DLT conforms to ASTM D4945.

PDA-DLT Specifications


PDF Format


Size: 320 x 250 x 68 mm (12.6 x 9.8 x 2.7 in)
Weight: 5 Kg (11 lbs)
Temperature range: operating 0° to 40°C (32 to 104° F); storage -20° to 65°C (-4 to 149° F)
Display: 26.4 cm (10.4 in), sunlight readable, resolution 1024 x 768
Built in capacitive touch screen
Video Outputs: HDMI
Power: 4-hour continuous data collection battery pack, 12 VDC car battery, or 100-240 VAC. Extra battery pack supplied.
Charging time: 6-hour maximum


Microsoft Windows® 10 Operating System
Minimum of 128 GB SSD internal drive
Ethernet port
4 USB ports
Analog signal conditioning filtering (frequency response) 2.5 KHZ (-3 dB)
16-bit A/D converter with sampling frequency of 10.24 MHz
8 channels with effective digitizing frequency of 10 KHz to 40 KHz selectable
1K, 2K, or 4K data record sizes available
Basic unit accuracy 2%


Built in calibration test function
Compatible with Smart Sensors
Wireless range up to 100 m (328 ft)
Up to 16 universal (strain or acceleration, piezoelectric or piezoresistive) channels of wireless data acquisition; limit one piezoelectric accelerometer per box
Up to 8 universal (strain or acceleration, piezoelectric or piezoresistive) channels of traditional data acquisition
Automatic balancing of signals and signal conditioning
Digital (software) integration of acceleration
Signal conditioning for force and acceleration have similar frequency response
Internal calibration check of strain and acceleration
Signal amplification capability
Triggers on any attached strain transducer
User adjustable pre-trigger buffer size
High speed internet data transmission using SiteLink® technology through broadband phone or other network device (additional desktop sharing software needed)
Dial up data transmission through data capable mobile phone connected via USB


Operates in English, SI, or Metric units
Optional external USB keyboard, mouse, and WiFi (802.11b,g,n) available
Includes both soft side carry-on luggage case and hard transit case
Equipped for remote technical support using SiteLink
Optional TeamViewer desktop sharing software license for use with SiteLink
Furnished with licenses for PDA Software Suite (PDA-S, iCAP®, PDIPLOT2, and PDI Curves), GRLWEAP and CAPWAP®
Full one-year warranty
Technical manual provided in PDF format on a USB drive