Circular Track Meter (C.T. Meter) is compliant with ASTM standard E-2157-01. Using a CCD laser displacement sensor, the C.T. Meter is designed to measure the roughness of a road surface along the measurement circular locus used to measure the coefficient of dynamic friction. There are several ways to express the roughness of the road surface, but the C.T. Meter expresses it as MPD (Mean Profile Depth), which can be used in combination with the D.F. Tester to calculate the IFI (International Friction Index).

Features

Time required for measurement is short and handling is easy. Used by connecting to a PC.
It is easy to carry and can be transported by van, pickup truck, or SUV.
The measured value represents MPD (Mean Profile Depth) and has good reproducibility.
Measurement is easy and precise - there are no individual differences.
Uses 12V DC power supply.
With one measurement, it is possible to obtain four types of data: the running direction of the road surface, the direction perpendicular to the running direction, the direction at 45° to the running direction, and the entire circumference.

Appropriate Road Surface

Paved surfaces such as sidewalks and motorways
Floor materials for buildings, etc.
Floors for common areas of condominiums, etc.
Floors of sports facilities such as gymnasiums

Specifications

    Size
    400 mm (D) x 400 mm (W) x 270 mm(H)
  
    Weight
    Net weight: 13 kg
  
    Body + case weight: 24 kg
  
    Displacement sensor
    CCD laser displacement sensor
  
    Laser measurement range
    30 mm (65 - 95)
  
    Laser spot diameter
    Dia. 70 μm
  
    Wavelength
    670 nm
  
    Resolution
    3 μm
  
    Measuring circle radius
    142 mm
  
    Number of samples per rotation
    1024
  
    Sampling interval
    0.9 mm (±0.05 mm)
  
    1 rotation is divided into 8 divisions, data processing for each division
  
    Number of samples per segment
    128
  
    Rotation speed
    6 m/min