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ANNEX IU.K.REQUIREMENTS FOR CONSTRUCTION, TESTING, INSTALLATION AND INSPECTION

III.CONSTRUCTION REQUIREMENTS FOR RECORDING EQUIPMENTU.K.

(a)General pointsU.K.

1. Recording equipment shall include the following: U.K.
1.1.Visual instruments showing:U.K.
1.2.Recording instruments comprising:U.K.
[F11.3. A means of marking showing on the record sheet individually: U.K.
2.Any inclusion in the equipment of devices additional to those listed above must not interfere with the proper operation of the mandatory devices or with the reading of them.U.K.

The equipment must be submitted for approval complete with any such additional devices.

3.MaterialsU.K.
3.1.All the constituent parts of the recording equipment must be made of materials with sufficient stability and mechanical strength and stable electrical and magnetic characteristics.U.K.
3.2.Any modification in a constituent part of the equipment or in the nature of the materials used for its manufacture must, before being applied in manufacture, be submitted for approval to the authority which granted type-approval for the equipment.U.K.
4.Measurement of distance travelledU.K.

The distances travelled may be measured and recorded either:

Any recording of reversing movements must on no account affect the clarity and accuracy of the other recordings.

5.Measurement of speedU.K.
5.1.The range of speed measurement shall be as stated in the type approval certificate.U.K.
5.2.The natural frequency and the damping of the measuring device must be such that the instruments showing and recording the speed can, within the range of measurement, follow acceleration changes of up to 2 m/s2, within the limits of accepted tolerances.U.K.
6.Measurement of time (clock)U.K.
6.1.The control of the mechanism for resetting the clock must be located inside a case containing the record sheet; each opening of that case must be automatically recorded on the record sheet.U.K.
6.2.If the forward movement mechanism of the record sheet is controlled by the clock, the period during which the latter will run correctly after being fully wound must be greater by at least 10 % than the recording period corresponding to the maximum sheet-load of the equipment.U.K.
7.Lighting and ProtectionU.K.
7.1The visual instruments of the equipment must be provided with adequate non-dazzling lighting.U.K.
7.2.For normal conditions of use, all the internal parts of the equipment must be protected against damp and dust. In addition they must be made proof against tampering by means of casings capable of being sealed.U.K.