1. Scope

This clause of Part 1 is applicable except as follows:

1.1

Replacement:

This standard applies to concrete vibrators, the active part ( vibrator bottle) of which is intended to be immersed into the mass of concrete to be vibrated.

They may be of one of the following designs:

- the motor and the vibrating mechanism are inside the vibrator bottle to which the part containing the mains switch is connected by means of a long flexible hose containing the interconnecting wires;

- the motor and the vibrating mechanism are inside the vibrator bottle to which a handle comprising the part containing the mains switch is fixed by means of a short rigid tube, these parts forming a constructional unit;

- the vibrator mechanism only is inside the vibrator bottle to which a separate portable unit comprising the motor and the part containing the mains switch is connected by means of a long flexible hose containing a flexible shaft.

Stationary concrete vibrators intended to vibrate concrete moulds, for example for prefabricated concrete elements, are not within the scope of this standard.