BS 3693:1992
Current
The latest, up-to-date edition.
Recommendations for design of scales and indexes on analogue indicating instruments
Hardcopy , PDF
English
31-01-1992
Committees responsible
Foreword
Recommendations
1 Scope
2 Definitions
3 Factors influencing scale design
4 Determination of scale length and reading distance
5 Basic scales
6 Method of design of scales
7 Index
8 Proportions of scale marks
9 Parallax
10 Other considerations
11 Form of digits
Tables
1 Examples of scale lengths for reading at distances
300 mm and 1000 mm
2 Direction of movement of the index for increasing
magnitude of the measurand
3 Dimensions of scale marks expressed as a ratio of
scale length
4 Examples of character heights for reading at
distances of 300 mm, 600 mm and 1000 mm
Figures
1 Nomenclature for dials and scales
2 Relations between reading distance and scale length
with respect to resolution factor
3 Examples of recommended scale marks
4 Recommended shapes of pointer tip
5 Illustrations of types of scales
6 Effect of parallax
7 Measuring range 8 A to 50 A, the subdivisions being
omitted outside the measuring range
8 Measuring range 80 V to 110 V, the measuring range
between the dots
9 Measuring ranges 0.06 MOhm to 0.4 MOhm and 0.1 MOhm
to 2 MOhm, the scale mark bases of the measuring
ranges being thickened
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