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Council Directive of 26 July 1971 on the approximation of the laws of the Member States relating to 5 to 50 kilogramme medium accuracy rectangular bar weights and 1 to 10 kilogramme medium accuracy cylindrical weights (71/317/EEC) (repealed)
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Changes over time for: ANNEX III
Version Superseded: 01/12/2015
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EU Directives are being published on this site to aid cross referencing from UK legislation. After IP completion day (31 December 2020 11pm) no further amendments will be applied to this version.
ANNEX IIIU.K.CYLINDRICAL WEIGHTS
1. Shape, constituent material and method of manufacture U.K.
1.1.Cylindrical shape with a flat knob for gripping.U.K.
1.2.Material used: any material with a density of 7 to 9·5 g/cm3, of a hardness at least equal to that of cast brass, not less resistant to corrosion and not more friable than grey cast iron, and with a surface comparable to that of grey cast iron carefully cast in a mould of fine sand.U.K.
Grey cast iron may not be used for weights of a nominal value of less than 100 g.
1.3.The method of manufacture to be appropriate to the material chosen.U.K.
2. Adjusting cavity U.K.
2.1.Internal cylindrical cavity with a larger diameter in the top part of the cavity.U.K.
2.2.The cavity is closed by a screw plug of drawn brass or by a brass plug in the form of a smooth disc. The screw plug has a screwdriver slot and the smooth disc has a central lifting hole.U.K.
2.3.The plug is sealed by a lead cap driven into a circular groove cut out in the wider part of the cavity.U.K.
2.4.Weights of 1, 2, 5 and 10 g do not have an adjustment cavity.U.K.
2.5.An adjustment cavity is optional for those of 20 and 50 g.U.K.
3.AdjustmentU.K.
3.1.After adjustment of the new weight by means of lead shot, two-thirds of the total volume of the cavity remains empty.U.K.
4. Positioning of the EEC initial verification mark U.K.
4.1.The final EEC verification mark is stamped on the lead seal of the adjustment cavity.U.K.
4.2.Weights without adjustment cavities are stamped on the base.U.K.
5. Markings and distinctive symbols U.K.
5.1.The indications stating the nominal value of the weight, as well as the manufacturer's identification mark, appear on the upper surface of the head of the weight, either indented or in relief. U.K.
5.2.The nominal value of the weight may be indicated on the body of weights of from 500 g to 10 kg.U.K.
5.3.The nominal value of the weight is indicated in the form:U.K.
1 g, 2 g, 5 g, 10 g, 20 g, 50 g, 100 g, 200 g, 500 g, 1 kg, 2 kg, 5 kg, 10 kg.
6. Dimensions and their tolerances U.K.
6.1.The dimensions to be complied with for the different weights are laid down in Annex IV (dimensions in millimetres).U.K.
6.2.The tolerances applicable to the various dimensions are the normal manufacturing tolerances.U.K.
7. Maximum permissible errors U.K.
| Nominal value. | Maximum permissible errors in milligrammes on initial verification |
|---|---|
| 1 g | + 5 |
| — 0 | |
| 2 g | + 5 |
| — 0 | |
| 5 g | + 10 |
| — 0 | |
| 10 g | + 20 |
| — 0 | |
| 20 g | + 20 |
| — 0 | |
| 50 g | + 30 |
| — 0 | |
| 100 g | + 30 |
| — 0 | |
| 200 g | + 50 |
| — 0 | |
| 500 g | + 100 |
| — 0 | |
| 1 kg | + 200 |
| — 0 | |
| 2 kg | + 400 |
| — 0 | |
| 5 kg | + 800 |
| — 0 | |
| 10 kg | + 1600 |
| — 0 |
8. Surface finish U.K.
8.1.If necessary, weights are protected against corrosion by a suitable coating resistant to wear and impact; they may be polished.U.K.
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