470. Requirements in respect of workstations; equipment.

The use1 as such of equipment must not be a source of risk for operators2 or users3. So far as the display screen is concerned:


    (1)     the characters on the screen must be well-defined and clearly formed, of adequate size, and with adequate spacing between the characters and lines;


    (2)     the image on the screen should be stable, with no flickering or other forms of instability;


    (3)     the brightness and the contrast between the characters and the background must be easily adjustable by the operator or user, and also easily adjustable to ambient conditions;


    (4)     the screen must swivel