Champ-Q evaluation of concrete quality in deep foundations by the Crosshole Sonic Logging method (CSL)
The Cross-Hole Analyzer determines the quality and consistency of the concrete of drilled shafts, slurry walls, bored piles, cast-in-situ piles and other types of concrete foundations. PDI’s Cross-Hole Analyzer (CHAMP-Q) is ideal for testing four probes (six profiles) in just one pull, saving time and money. CHAMP-Q has color coded wires for easy identification of probe receiving/transmitting. The CHAMP-Q meets or exceeds the specifications of ASTM D6760 and several other crosshole sonic logging codes and standards.
Test the entire shaft with CHAMP-Q
Once a shaft is prepared with PVC or steel tubes during construction, transceivers are lowered into the access tubes and probe one will transmit a high frequency signal that travels through the concrete and is detected by the other probes which are acting as receivers. This action is repeated with the other probes being automatically configured as transmitters sequentially allowing up to six profiles to be scanned with a single pull. As these sensors are raised and/or lowered along the length of the foundation, the CHAMP-Q displays and records the strength of the received signal, as well as the time from signal emission to signal arrival as a function of depth.
In CSL testing, scanning various tube combinations for the entire shaft allows evaluation of concrete quality and defect location along the length and by quadrant. With the CHAMP-Q, the user can pull four cables at once, each color coded for easy identification, and via a newly designed, space efficient tri-pod.
The CHAMP-Q Tablet is portable, light and rugged featuring:
CHAMP’s CHA-W Data Processing Software provides powerful tools for data analysis such as:
CHA-W reporting tools comprise of user customized graphs and tables:
Main Unit
Physical:
Size: 320 X 250 X 68 mm (12.6 x 9.8 x 2.7 inches)
Weight: 5 Kg (11 lbs.)
Temperature range: 0 to 40°C (32 to 104° F) operating; -20 to 65°C (-4 to 149° F) storage
Display: 26.4cm (10.4”), sunlight readable, resolution 1024 X 768
Built in capacitive touch screen
Video Outputs: HDMI, VGA
Power: 4 hour continuous data collection with internal 12V battery, or 100 – 240 VAC power supply
Charging Time: 6 Hours max.
Electronic:
Microsoft Windows® 10 Operating System
60 GB SSD internal drive
Ethernet port
4 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:
Operates in English or SI Units
Furnished with CHA-W software
Full one year warranty
Technical manual included
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