The Cross-Hole Analyzer (CHA) determines the quality of the concrete of deep foundations by the Crosshole Sonic Logging (CSL) method. It also performs single hole logging. The CHA model CHAMP consists of a main unit, transmitter, receiver, two independent depth measuring devices, a tripod for assembling the test, and the powerful software CHA-W.

Drilled shafts are prepared for the test by installation of PVC or steel tubes during their construction. During the test a transmitter is lowered down one of the tubes and sends a high frequency signal to a receiver inserted in another tube. Transmitter and receiver move down each pair of tubes, scanning the entire length of the shaft. CHAMP transmitters and receivers are available with cables of various lengths, and may each be positioned at different depth levels for maximum testing flexibility.

The CHAMP is small, light and operable by a color touch-screen visible in all lighting conditions. Its internal battery, designed to last an entire day of normal testing, frees the tester from a power source, allowing easy movement between shafts. Essential analysis is performed in the field in real time.

Field data is further analyzed by the CHA-W software, which outputs graphs such as First Arrival Time, Wave Speed, Waterfall Diagram and Energy Plot, and aids in test report preparation. Tomography imaging performed with the Tomosonic Software further enhances the interpretation of test results.

The Cross-Hole Analyzer is also available in the model CHA-QX featuring a keyboard and the option of running CHA-W in the equipment itself.

Both Cross-Hole Analyzer models meet or exceed the specifications for cross-hole sonic logging required by D6760-02 Standard Test Method for Integrity Testing of Concrete Deep Foundations by Ultrasonic Crosshole Testing.