I. DEFINITIONS

In this appendix

a) ‘control device’ means equipment intended for installation in road vehicles to show and record automatically or semi-automatically details of the movement of those vehicles and of certain working periods of their drivers;

b) ‘record sheet’ means a sheet designed to accept and retain recorded data, to be placed in the control device and on which the marking devices of the latter inscribe a continuous record of the information to be recorded;

c) ‘constant of the control device’ means the numerical characteristic giving the value of the input signal required to show and record a distance travelled of 1 kilometre; this constant must be expressed either in revolutions per kilometre (k = ... rev/km), or in impulses per kilometre (k = ... imp/km);

d) ‘characteristic coefficient of the vehicle’ means the numerical characteristic giving the value of the output signal emitted by the part of the vehicle linking it with the control device (gearbox output shaft or axle) while the vehicle travels a distance of one measured kilometre under normal test conditions (see Chapter VI, paragraph 4 of this appendix). The characteristic coefficient is expressed either in revolutions per kilometre (W = rev/km) or in impulses per kilometre (W = ... imp/km);

e) ‘effective circumference of wheel tyres’ means the average of the distances travelled by the several wheels moving the vehicle (driving wheels) in the course of one complete rotation. The measurement of these distances must be made under normal test conditions (see Chapter VI, paragraph 4 of this appendix) and is expressed in the form: 1 = ... mm.

II. GENERAL CHARACTERISTICS AND FUNCTIONS OF CONTROL DEVICE

The control device must be able to record the following:

1. distance travelled by the vehicle;

2. speed of the vehicle;

3. driving time;

4. other periods of work or of availability;

5. breaks from work and daily rest periods;

6. opening of the case containing the record sheet;

7. for electronic control device which is device operating by signals transmitted electrically from the distance and speed sensor, any interruption exceeding 100 milliseconds in the power supply of the recording equipment (except lighting), in the power supply of the distance and speed sensor and any interruption in the signal lead to the distance and speed sensor.

For vehicles used by two drivers the control device must be capable of recording simultaneously but distinctly and on two separate sheets details of the periods listed under 3, 4 and 5.

III. CONSTRUCTION REQUIREMENTS FOR CONTROL DEVICE

A. GENERAL POINTS

1. Control device shall include the following:

a) Visual instruments showing:

distance travelled (distance recorder),

speed (speedometer),

time (clock).

b) Recording instruments comprising:

a recorder of the distance travelled,

a speed recorder,

one or more time recorders satisfying the requirements laid down in Chapter III C 4.

c) A means of marking showing on the record sheet individually:

each opening of the case containing that sheet,

for electronic control device, as defined in point 7 of Chapter II, any interruption exceeding 100 milliseconds in the power supply of the control device (except lighting), not later than at switching-on the power supply again,

for electronic control device, as defined in point 7 of chapter II, any interruption exceeding 100 milliseconds in the power supply of the distance and speed sensor and any interruption in the signal lead to the distance and speed sensor.

2. Any inclusion of 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.

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

3. Materials

a) All the constituent parts of the control device must be made of materials with sufficient stability and mechanical strength and stable electrical and magnetic characteristics.

b) Any modification in a constituent part of the control device 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 control device.

4. Measurement of distance travelled

The distances travelled may be measured and recorded either:

so as to include both forward and reverse movement, or

so as to include only forward movement.

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

5. Measurement of speed

a) The range of speed measurement shall be as stated in the type-approval certificate.

b) 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.

6. Measurement of time (clock)

a) 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.

b) 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 per cent than the recording period corresponding to the maximum sheet-load of the equipment.

7. Lighting and protection

a) The visual instruments of the control device must be provided with adequate non-dazzling lighting.

b) For normal conditions of use, all the internal parts of the control must be protected against damp and dust. In addition they must be made proof against tampering by means of casings capable of being sealed.

B. VISUAL INSTRUMENTS

1. Distance travelled indicator (distance recorder)

a) The value of the smallest grading on the control device showing distance travelled must be 0.1 kilometres. Figures showing hectometres must be clearly distinguishable from those showing whole kilometres.

b) The figures on the distance recorder must be clearly legible and must have an apparent height of at least 4 mm.

c) The distance recorder must be capable of reading up to at least 99,999.9 kilometres.

2. Speed indicators (speedometer)

a) Within the range of measurement, the speed scale must be uniformly graduated by 1, 2, 5 or 10 kilometres per hour. The value of a speed graduation (space between two successive marks) must not exceed 10 per cent of the maximum speed shown on the scale.

b) The range indicated beyond that measured need not be marked by figures.

c) The length of each space on the scale representing a speed difference of 10 kilometres per hour must not be less than 10 millimetres.

d) On an indicator with a needle, the distance between the needle and the control device face must not exceed 3 millimetres.

3. Time indicator (clock)

The time indicator must be visible from outside control device and give a clear, plain and unambiguous reading.

C. RECORDING INSTRUMENTS

1. General points

a) All equipment, whatever the form of the record sheet (strip or disc) must be provided with a mark enabling the record sheet to be inserted correctly, in such a way as to ensure that the time shown by the clock and the time-marking on the sheet correspond.

b) The mechanism moving the record sheet must be such as to ensure that the latter moves without play and can be freely inserted and removed.

c) For record sheets in disc form, the forward movement device must be controlled by the clock mechanism. In this case, the rotating movement of the sheet must be continuous and uniform, with a minimum speed of 7 millimetres per hour measured at the inner border of the ring marking the edge of the speed recording area.

In equipment of the strip type, where the forward movement device of the sheets is controlled by the clock mechanism the speed of rectilinear forward movement must be at least 10 millimetres per hour.