BS 6393:1987

National foreword
Committees responsible
Specification
1 Scope and field of application
2 References
3 Definitions
4 Types and purposes of instrument calibration
    specimens
5 Materials
6 Size of specimen
7 Mechanical requirements
8 Basis of assessment of calibrated values
9 Marking
Annexes
A Calibration of instrument calibration specimens
B Use of instrument calibration specimens
C Reference conditions, error and statements
Tables
1 Nominal values of depth and width for type A1
2 Tolerances for types A1 and A2
3 Nominal values of depth and radius for type A2
4 Tolerances for type B2 sensitive and insensitive
    grids
5 Nominal values of Ra for type C1
6 Tolerances for types C1 to C4
7 Nominal values of Ra and alpha for type C2
8 Nominal unfiltered values of Ra for type C4
9 Tolerances for type D
10 Values of k
11 Skid radii giving 5 % maximum out-of-phase error
Figures
1 Type A1 groove
2 Type A2 groove
3 Type B2 grooves (sensitive grid)
4 Type B2 grooves (insensitive grid)
5 Type C1 grooves
6 Type C2 grooves
7 Type C3 grooves
8 Type C4 grooves
9 Type D groovres (profile repetition at 4 mm
    intervals)
10 Assessment of calibrated values for type A1
11 Profile graphs
12 Gauge blocks providing a series of steps
13 Choice of sampling length
14 Effects of horizontal magnification
15 Transmission characteristic for calibration
16 Ra transmission curves characteristic of types C1,
    C2 and C4 specimens conforming to ISO 3274
17 Stylus wear
18 Sheared off spherical tip
19 Centrally relieved flat skid
20 Skid errors
21 Profiles traced by a spherical skid on a sinusoidal
    specimen
22 Effect of oblique traversing on wavelength