Cross-Hole Analyzer (CHAMP-XV)

Evaluation of concrete quality in deep foundations by the Crosshole Sonic Logging method (CSL)

  • Assesses concrete quality and consistency of drilled shafts, slurry walls, bored piles, cast-in-situ piles and other types of concrete foundations
  • Performs real-time analysis on site, as well as data transfer capability to a PC for further analysis with CHA-W reporting software
  • PDI-TOMO software available for superior tomographic results providing intuitive 3-D identification of questionable areas, as well as allowing for a quick and easy quantitative, comprehensive, engineering analysis
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The Cross-Hole Analyzer evaluates the quality of the concrete of deep foundations by the Crosshole Sonic Logging (CSL) method. It also performs Single Hole Sonic Logging (SSL).

a receiver and a transmitter in sturdy brass housingReceiver and Transmitter in Sturdy Brass Housing

The CHAMP-XV consists of a main unit with 60 GB internal solid state drive (SSD) and Windows 7 OS, a receiver and a transmitter in sturdy brass housing, two independent depth measuring devices, a tripod for assembling the test, and the powerful software CHA-W. Options include the Motorized Probe Deployment System that relieves the operator from pulling the cables manually, making testing more comfortable and the PDI-TOMO software.

Drilled shafts and other cast-in-place concrete foundations 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. Cables for the receiver and transmitter are available in various lengths, and may each be positioned at different depth levels for maximum testing flexibility.

PDI-TOMO

 

The attractive enclosure of the CHAMP-XV cross-hole analyzer is still light and small, but its color touch-screen display is 5 cm larger than the previous model and visible in all lighting conditions. The replaceable internal battery frees the tester from a power source, allowing easy movement between shafts. This allows for essential analysis to be performed in the field in real time. In addition, data entry is optimized for speed of testing and to minimize erroneous input.

Field data is transferred to a computer through USB ports and 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.

The CHAMP-XV meets or exceeds the specifications for cross-hole sonic logging required by D6760 Standard Test Method for Integrity Testing of Concrete Deep Foundations by Ultrasonic Crosshole Testing.

 

CHA-W Software

CHA-W processes Cross-Hole Analyzer data. Its analysis tools include evaluation of signal strength, the helpful Edge Finder to detect the First Arrival Time (the moment the signal sent by the transmitter first reaches the receiver, also known as FAT) and Defect Analysis, a visual aid for easy defect identification. CHA-W reporting tools comprise user customized graphs and tables.

The mean and standard deviation of the measured wave speed and the location of defect is displayed. Graphs include signal strength versus time and depth (Sonic Map, also called Waterfall Diagram), FAT versus depth, wave speed versus depth and signal strength versus depth.

CHAMP-XV Specifications

September 2015
PDF Format

Main Unit

Physical
Size: 320 X 250 X 68 mm (12.6 X 9.8 X 2.7 inches)
Weight: 5 kg (11 lbs.)
Display: 26.4 cm (10.4 inch) sunlight readable touch screen display, resolution 1024 X 768
Operating temperature range: 0˚ – 40˚ C
Power: 4-hour continuous data collection with internal 12V battery, or 100 – 240 VAC power supply
Charging Time: 6-hours maximum

Electronic
Computer with 60 GB SSD internal drive and 4 external USB ports
12-bit analog to digital (A/D) converter
Sampling rate: 500 kHz, 1 MHz and 2 MHz, user selectable (equivalent measuring accuracy 2μs, 1μs and 0.5μs)
Scan rate: 32 scans/seconds
Record size: 250, 500 and 1000 points, user selectable
User adjustable gain, trigger level and transmit power level

Other
Windows® 7 OS
Operates in English or SI Units
Furnished with CHA-W software
Full one-year warranty
Technical manual provided in PDF form on a USB drive

Probes

Physical

Size: 215 mm length x 25 mm diameter
Element: ceramic
Housing: nickel plated brass
Independent depth encoder for each probe
Maximum measuring distance (probe separation): 3m

Electronic
Receiver: tuned to 45 KHz nominal
Transmitter frequency (nominal): 45 KHz
Transmitter voltage: 200, 400, 600 or 800 Volts (user selectable)

Cables
Cable material: heavy duty polyurethane outer jacket
Cable length: 60, 100 or 150 m
Cables spooled over tripod (standard) or with optional Motorized Probe Deployment System (60
m only)

Motorized Probe Deployment System

Main Unit
Size: Two 380mm X 480mm X 405mm spools
Weight: 11.3Kg each
Includes 60 m cable, detachable from spool
Includes depth encoder for each probe, attached to frame

Motor Control Unit
Size: 240mm X 160mm X 90mm
Weight: 1.6 Kg
Powered by either external battery (8 hours duration), 12VDC car battery, or 100 – 240 VAC
with 12VDC converter
Fast charger to recharge the external battery in 4 hours
Variable probe pull rate: 0.150 to 0.915 m/sec (low, medium, high speed selection)
Resettable circuit breaker motor protection
Operating temperature range: 0° to 40°C
Storage temperature range: -10° to 65°C

Other
Includes pulley for placement at the tube
Includes roller guide for routing cable through re-enforcement rebar cage or over casing