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Rz = average roughness
The average roughness Rz is the arithmetic mean of the largest single roughness depths of several adjacent individual measuring sections.
Ra = arithmetic centers roughness
Ra is the generally recognized and internationally applied roughness parameter. It is the arithmetic mean of the absolute values of the profile deviations within the reference line.
The measured value Ra is always smaller than the Rz value determined on the same roughness profile.
Measurement parameters | Ra, Rz, Rq, Rt |
Measuring ranges | Ra, Rq: 0.005 ... 16.00 µm / 0.197 ... 629.921 µin Rz, Rt: 0.002 ... 200.0 µm / 0.079 ... 7874.016 µin |
Radius probe tip | 5 µm/ 196.850 µin |
Material probe tip | Diamond, 90° angled |
Max. recommended force for static measurement | 4 mN (0.4 gf) |
Radius longitudinal guide bar | 45 mm / 1.77" |
Standards | ANSIB46.1/ASMEB46.1 (DIN EN ISO 4287) |
Maximum driving distance | 15 mm / 0.59" |
Measuring principle | Inductive |
Cut-off wavelength | 0.25 mm / 0.8 mm / 2.5 mm / 0.009" / 0.03" / 0.098" |
Testing speed | 0.135 mm/s at cut-off wavelength: 0.25 mm 0.5 mm/s at cut-off wavelength: 0.8 mm 1 mm/s at cut-off wavelength: 2.5 mm Reversing speed: 1 mm/s |
Measuring accuracy | < ± 10% |
Repeatability | < 6% |
Display | OLED |
Units | μm / μinch (switchable) |
Interface | Micro-USB |
Power supply | Rechargeable Li-ion battery |
Dimensions L x W x H | 150 x 60 x 43 mm / 5.9 x 2.36 x 1.69 in |
Weight | 370 g / < 1 lb |
1 x Surface Testing - Roughness Tester PCE-RT 1200
1 x Micro-probe
1 x Downloadable Software
1 x Roughness standard
1 x USB cable
1 x Charging adapter
1 x Carrying case
1 x User manual
1 x ISO calibration certificate
N.B. Calibration certificates are issued specifically for the customer and are excluded from the right of return.