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CHUM

Cross Hole Ultrasonic Monitor

The CHUM (Cross Hole Ultrasonic Monitor) uses the Crosshole Sonic Logging CSL testing method to perform high-resolution quality control of deep foundations.

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  • Up to 150m (450') deep

  • Tomography ready complimentary

  • Standards: ASTM D6760, AFNOR  NF P 94-160-1

  • Integrated support for DFI CSL Rating Criteria   - See CHUM software

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Applications

For testing pile integrity based on the CSL method of medium to large piles with supporting access tubes. More about the crosshole test method

Fast and Reliable Crosshole Deep Pile Foundations Testing

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Reliable

  • 100% QA tests at 16-atmosphere pressure, vibration, and extreme temperature.

  • The CHUM case can tolerate drops and shocks.

  • 3 years warranty!

  • Rugged connectors, cables & sensors

  • 10 years of free software

Easy to Use

  • Usually, no training is needed, and the system can be self-taught in hours. (No expensive training days)

  • Supports AGC (Automatic Gain Control) for simple, fast, and accurate performance in dynamic conditions.

Top Performance

  • Up to 150m (450') deep. (deeper optional)

  • A clean signal on 3m and more on solid concrete.

  • The cleanest signal in the industry.

  • Productivity - 4 tubes X 25m piles - 8 such piles tested in 2 hours!

CHUM - Technical Specifications

Physical

Housing 
Dimentions 
Weight


Temperature range

Rugged, Environment-proof, water-resistant housing.
430mmL x 325mmW x 105mmH (instrument only)
3.8 kg (instrument only)

5.0 kg (instrument with typical tablet)

16.0kg (Typical shipping)

-20°C to +55°C  (Operating)

-40°C to +80°C  (Storage)

Power

Internal

 

External

Rechargeable Lithium Ion battery 11.1V 4.4Ah

(two days of typical use)

100-240V AC operation/charging

Standards

ASTM D6760 –16

​ AFNOR  NF P 94-160-1

Meets or exceeds. See details

Technical

Transducers

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Cables

Sample rate

Gain

Depth meters

Dual-mode Transceivers, 50kHz nominal, 16bar pressure-tested housing, 25mm diameter

Heavy-duty polyurethane 

500kHz (2μS resolution)

8-level auto gain control (AGC)

Two 24-bit counters. <0.1% error

Performance

Pile lengths

Tube spacing Productivity

Storage

1m to 150m

Up to 5m in good concrete

Up to 3000m/Day by a single operator

Unlimited

Computer (Minimum)

Windows XP/Win7/Win10/Win11.

800x600 resolution or higher

Requirements

Output

Reporting

 

 

Language

Arrival time, energy and wave speed curves,

“waterfall” presentation, fuzzy-logic and 3D

tomography

Multi-lingual user-interface and reporting

Cable reels

Software

 

Miscellaneous

50m, 100m, 150m, and custom lengths

3DT  - Three-dimensional Tomography (Also provided as an email service)

12V DC car battery power adapter

Options

Other Customers Also Purchased

GPC

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GPC the PDA system from Piletest 

It is the next generation of dynamic pile testing systems, designed with simplified software and higher ease of use than incumbent systems. Professor George G. Goble, the pioneer of dynamic pile analyzers, designed the GPC system.  It comes with a unique Combiducer and 100% lossless wireless data transmission,

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3DT

3 Dimensional Tomography
While normal (1D) CSL can only show the depth of an anomaly, tomography can help in the visualization of the shape, size, and location of anomalies. It is an analysis and presentation method of captured CSL data, that projects the logged results into two dimensional (2D) plane or three dimensional (3D) body. 

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PET

Pile Echo Tester

The PET uses the Pulse-Echo method (PEM) for a quick pile integrity test (PIT test) on a site with a large number of piles. A pile test starts when the pile top is struck with a lightweight handheld hammer. The reflected wave is captured and analyzed by the PET's digital accelerometer to provide information regarding the length and shape of the pile.

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    This is example accessory #2 description.
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