RA-Profilometer Documentation

RA-Profilometer Documentation

Rubber Fab can provide certified documentation

Rubber Fab’s Surftest profilometer is a surface roughness measuring instrument, which traces the surfaces of various machine parts, calculates their surface roughness based on roughness standards, and displays the results. Rubber Fab provides certified documentation verifying the results. This test is produced upon request.

Surftest SJ-201 Series 178-Portable Surface Roughness Tester

  • The display unit demonstrates IP53 protection level and is resistant to dripping water and dust.
  • The built-in battery, if fully charged, allows approximately 500 measurements to be made.
  • A convenient carrying case is supplied as standard for protecting the instrument in the field.
  • Up to 10 measurement results can be saved in the built-in memory.
  • Measurement results appear in large characters on the large LCD screen. Results can be confirmed at a glance.
  • Detailed set-ups, such as change of standards and cutoff lengths, can be made by pressing the relevant buttons after sliding back the top cover.
  • The SPC connector for Digimatic output and the RS-232C output connector are provided on the rear panel of the display unit for data output to external devices.
  • Printout of recorded profiles is also possible if the tester is connected to the dedicated hand-held, built-in battery operated compact SJ-printer (optional).

Technical Data

X-axis (drive unit)

Measuring range: .49″ (12.5mm)
Measuring speed: .01″, .02″/s (0.25, 0.5mm/s)
.01″/s (0.25mm/s: S-type)
Traversing direction: Backward
Detector Range: 13780µin (-7880µin to+5900µin)
{350µm (-200µm to +150µm)}
Detecting method: Skid measurement
Measuring force: 4mN or 0.75mN (low force type)
Stylus tip: Diamond, 90°/5µmR
(60¨¬/2µmR: low force type)
Skid radius of curvature: 40mm
Skid force: less than 400mN
Detecting method: Differential inductance
Power supply: Via AC adapter / rechargeable battery
Battery life: Max. 600 measurements (w/o printing)
Recharge time: 15 hours
Data output: Via RS-232C interface / SPC output
Dimensions (WxDxH): Control unit: 6.7 x 2.4 x 2.0″
{156.5 x 62 x 52mm} (SJ-201)
4.5 x .90 x 1.02″
Drive unit: 115 x 23 x 26mm
Mass Control unit: Approx. 0.3kg (SJ-201)
Drive unit: 0.2kg
Evaluation capability: SJ-201
Applicable standard: JIS”82, JIS”94, JIS”01, DIN, ISO, ANSI
Assessed profile: Primary profile le (P), Roughness profile (R), DIN4776
(Primary profile (P), Roughness profile (R), MOTIF (R):M-type)
Evaluation parameters: Ra, Ry, Rz, Rq, S, Sm, Pc, R3z, mr (c), Rt, Rp, Rk, Rpk, Rvk, Mr1, Mr2, A1, A2, Vo (can be customized) (R, AR, Rx: M-type)
Digital filter 2CR, PC75, Gaussian
Cut-off length: ëc: .01, .03, .1″ (0.25, 0.8, 2.5mm)
ës: 1″, .3″ (2.5, 8mm).
Number of sampling length: X1, X3, X5
Arbitrary length: .01″± to .49″± (0.3 to 12.5mm)
.01″± (0.1mm) increments
Sampling length (L): .01, .03, .1″ (0.25, 0.8, 2.5mm)