Robotest International

Calotester kaloMAX NT II S3

The ball crater test (Calotest) is a well-established method for the determination of layer thickness. With a rotating steel ball and an abrasive slurry, a spherical cap is ground through the coating into the base material of the sample. When examined with a microscope, the layer/base material interface appears as a circle or, in case of a multilayer coating, a system of concentric circles. The layer thicknesscan be calculated from the diameters of these circles and the diameter of the grinding ball. 

This purely geometrical method gives highly accurate results even for layer thicknesses in the range of micrometers

Evaluation and documentation can be further simplified by the software kaloSOFT and a camera-equipped microscope.

►  Fast and easy layer thickness measurement

►  Reproducible measurement of wear and scratching resistance

►  Measurement of layer thickness

►  Comfortable operation

►  For quality assurance and coating development

►  Suitable for hard coatings, lacquers, plastic coatings

Item

Parameter

Layer thicknesses

Approx. 0.3 – 30 μm

Diameter of the spherical cap

Approx. 0.1 – 2 mm

Measurement accuracy

1 – 5 % (dependent on surface roughness)

Ball diameter

15 – 30 mm

Clamping range for plane samples

50 mm

Clamping range for round samples

3 – 30 mm (clamping jaw for other dimensions on request)

Cross table travel

25 x 25 mm

Incline of sample level

60 degrees

LED displays (14 mm height)

4 digits number of revolutions,
4 digits runtime, 1 digit program number

Number or revolutions of the drive shaft

100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200 1/min

Running periods

5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80, 90, 100, 110, 120, 150, 180 s

Input voltage range

85 – 264 VAC

Input frequency range

47 – 63 Hz

Dimensions

300 x 295 x 235 mm (w / d / h)

Weight

Approx. 8 kg