(European Community registered design #:01699042)
The Auto Lift Arm ECO Wheel Tracker saves energy, is space efficient and can double daily testing output.

Wheel tracking is used to assess the resistance to rutting of asphaltic materials under conditions which simulate the effect of traffic. A loaded wheel tracks a sample under specified conditions of load, speed and temperature while the development of the rut is monitored continuously during the test. Test specimens can be either slabs prepared with a laboratory compactor or 200 mm Ř cores cut from the highway.

The Wheel Tracker CRT–WTECO–A^TM performs both procedures A and B specified for the small scale device in EN 12697-–22. Procedure A requires that six specimens are tested. For procedure B, only two specimens need to be tested, but rut depth must be measured at more points along the longitudinal rut profile. To speed up the testing process, the CRT–WTECO–A^TM was designed to test two specimens within one working day via a pre–programmable unique lift arm mechanism (European Community registered design #: 001699042).

  Key Uses:

• Determination of the rut resistance of asphaltic paving materials

• EN 12697-–22 Small device
• AGPT/T231 (supersedes AST 01)
• TO719

• Test materials for roads with axle loads up to 13 tonnes
• Fully programmable automated lift arm, enables up to twice the normal test throughput
• Automated pre programmable sample conditioning
• Small and compact for maximum energy efficiency, 28% saving over CRT-WTEN1
• Integral temperature controlled cabinet with fully glazed doors
• PID control of test temperature in the range 40^°C to 62^°C
• Specimens compacted with the Cooper Technology Roller Compactor can be transferred directly to the wheel tracker without de–moulding
• User-friendly Windows^TM software
  Supplied with UKAS accredited calibration certification

• User friendly, intuitive and reliable Windows^TM software developed using LabVIEW™
• Programmable for auto start, enabling up to double daily testing output
• Programmable sample conditioning to enable test to start prior to the working day
• Software automatically starts the wheel tracker, maintaining the speed at the specified 26.5 cycles per minute
• Measures rut depth and sample temperature automatically at regular intervals
• The rut profile is captured automatically by the software and analysed to calculate the rut depth
• A continuously updated on–screen graph shows rut depth versus time, along with the rut profile and temperature
• Software stops the wheel tracker on completion of a test and prints a test report if required
• Stored test data can be analysed and compared with other test data utilising a spreadsheet package
• Utilities are included for transducer check, diagnostic routines and RTD calibration
• USB PC link

• Calibration, Annual Service and Maintenance Contracts are available for this device. UKAS accreditation to satisfy typed testing as described in EN 13108. Please enquire for further details.
• Note: This device should be checked and calibrated annually.