Freedom Data PC
The Freedom Data PC system provides the user with unmatched flexibility for stress-wave based condition evaluation of concrete, masonry, asphalt, wood and other construction materials, as well as seismic testing of soil and rock and virtually any general test and or data acquisition measurement. By simply changing out the instrument modules in the two built-in bays, the user can quickly switch between compatible tests using any of the available NDE Methods, while using similar software for data acquisition and analysis.
Possible Testing Packages
There are over a dozen add-on packages for NDT which can be used with the Freedom Data PC you can choose any combination of the packages with purchase and can upgrade your Freedom Data PC at anytime with the purchase of a new add-on NDT packages.
Please see below for a full description of the add-on kits and their applications. Take special note of the unique packages only usable with the Freedom Data PC, Crosshole Sonic Logging, Crosshole/Downhole Seismic and Seismic Refraction/Seismic Reflection.
Pavement, Structural and Tunnel Systems
ASTM C1383
Determine the thickness of a concrete or masonry element and detect internal flaws and for QA of repairs from sound wave resonant echoes. IE Test Head with displacement transducer and solenoid taps the concrete creating a sound-wave. Optional 0.1 kg impulse hammer and accelerometer. Access to only one side of the concrete (or masonry) element is required.
Roll on smooth concrete for IE scanning of thickness/flaws every 25 mm and scan lengths of up to 4 to 5 m in length. Diagnose voided post-tensioned bridge ducts, void/honeycomb, cracking, delaminations and thickness profiling by scanning. One-sided scans for smoother finish or formed concrete up to 1 m thick.
ACI 228.2
Used for finding and mapping voids below slabs on grade, dam spillways and behind tunnel liners. Also used on concrete structures for defects. The slab surface is struck with a calibrated impulse hammer and the response collected by an adjacent receiver. Access to only one side of the concrete element is required.
Ultrasonic Pulse Velocity (UPV)
ASTM C597
Determine the relative strength and quality of concrete and is also used for Locating internal defects. Sonic Pulse Velocity (SPV) for thicker materials. Transmitting and receiving transducers send and receive ultrasonic pulses through concrete, allowing velocity and amplitude to be calculated. Normally requires 2-sided access or access around corners. Test concrete, masonry, wood and stone with UPV and SPV options.
ACI 228.2
Concrete quality vs. depth (for fire and freeze-thaw damage assessment), and condition assessment of concrete slabs and tunnel liners. Surface waves are created by a hammer strike and collected by two receivers which are in-line at a set spacing. Typically done with the SASW bar as shown. Access to only one side of the concrete element is required. Also conduct SASW tests on masonry and stone.
Multiple Impact Surface Waves (MISW)
Determine pavement thicknesses of asphalt or concrete, base, subgrade and layer elastic moduli. Structural/tunnel applications. Accelerometer/Geophone receiver(s) measure compression and surface wave arrivals from manual/automated impacts at multiple points. Modeling software for layered systems. One-sided access requirement for asphalt, concrete, masonry, soil and rock.
ASTM C215/C266
Conduct resonance tests of concrete cylinders/beams or rock cores. Measure Young’s and Shear Moduli of concrete and stone/rock and test concrete for freezethaw durability. Square cast or cut specimens are required for testing per the ASTM standard.
Foundation Depth and Integrity Systems
Cross Hole Sonic Logging (CSL) - Unique to Freedom Date PC
ASTM D6760-08 | ACI 228.2R
The Crosshole Sonic Logging (CSL) system is designed for Quality Assurance (QA) testing of newly placed critical drilled shaft foundations and auger cast piles, but can also be applied to slurry walls, mat foundations, and mass concrete pours. Using water-filled access tubes, CSL testing provides assurance that the foundation concrete is sound with no defects such as soil intrusions, necking, sand lenses, voids, etc. Where defects exist, the extent, nature, depth, and approximate lateral location of the defects can be determined with the CSL method and further refined with Tomographic Imaging Software. Testing requires a number of bore holes to be located around the foundation.
Sonic Echo/Impulse Response (SE/IR)
ASTM D5882
SE/IR tests are performed to evaluate the integrity and determine the length of deep foundations. The foundation top is struck by a hammer and the response of the foundation is monitored by an accelerometer and/or geophone receiver. Either the top or access to the upper side are required for foundation testing.
ACI 228.2
Used to determine lengths of deep foundations which are long and slender, have inaccessible tops, or have unusual construction (multiple subgrade elements). The structure/foundation is struck by a hammer and the response of the foundation is monitored by a hydrophone or geophone receiver lowered down a cased borehole. A 50-100 mm ø cased borehole is drilled to 3-5 m below the foundation.
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US investigations can evaluate the integrity and find the length of foundations such as drilled shafts, piers and driven or auger-cast piles. The foundation top is struck by a hammer and the response of the foundation is monitored by a 3-component receiver at multiple vertical locations. A least 1.5-1.8 m of the side of the structural element is required to be exposed for mounting the receiver.
Geophysical Seismic Surface Wave Systems
Crosshole/Downhole Seismic (CS/DS) - Unique to Freedom Data PC
ASTM D4428/D4428M-07
The Crosshole Seismic (CS) system and method determine shear and compressional wave velocity versus depth profiles. From these measurements, parameters, such as Poisson’s ratios and moduli, can be easily determined.Downhole Seismic (DS) investigations are similar to CS investigations, but require only one borehole to provide shear and compressional velocity wave profiles. Both Methods require one or more bore holes and either the surface is struck or a borehole striker is used.
Features
- 8-10 Hour Life Internal Lithium Ion Rechargeable Batteries
- 14" Diagonal Backlit Screen (1366x768)
- Shock Mounted and Weather Resistant, Ruggedized Design and keyboard
- 10/100/1000MB LAN, USB, SVGA and Serial
- 3 x USB Ports
- SVGA port for external monitor
- Plug-In Multi-Channel Data/Source Modules
- National Instruments 1.25 MHz 16 channel PCI Data Acquisition Card Standard, Optional Cards Available
- Weight 10.5 kg Fully Loaded
- Windows XP or Windows 7 based low power 1.6Ghz Intel Atom Processor, 1GB DRAM
- 120 GB Hard Drive and External CD-RW [Larger available as an option]
- External 12 Volt Automotive Cigarette Lighter Adapter and switch mode AC adaptor
