Practical advice

• Avoid splashing the concrete. Otherwise you could slip and lose control of the power tool.

• Do not leave the power tool switched on for prolonged periods with the vibrator head outside of the concrete. Otherwise, the lifetime of the bearings may be reduced.

• Do not switch the internal vibrator on until you are ready to start working.
• Adopt a secure and stable working posture. Do not lean too far forwards.
• Avoid overloading the motor and kinking the hose since this may damage the elastic hose pipe.
• The concrete is sufficiently compacted when the surface is closed and bare and no more air bubbles emerge. Vibrating the material for too long will result in separation (of the sand, gravel and cement) and cause the concrete to lose its strength. You should therefore pay close attention to how work is progressing.
• Immerse the vibrator head in the material at intervals of between 8 and 10 times the diameter of the vibrator head, e.g. vibrator head diameter of 35 mm = immersion interval of 35 cm, vibrator head diameter of 45 mm = immersion interval of 45 cm, etc.
  See figure D: X = (8 to 10) x diameter _{vibrator head}
• When pouring successive layers of concrete, the vibrator head must be inserted 10 to 15 cm deep into the previously compacted layer underneath in order to achieve good adhesion between the layers.
• Pull the vibrator head out of the material slowly with the motor running in order to prevent bubbles or dents forming in the compacted surface.
• Avoid prolonged contact with formwork or reinforcements in order to prevent damage to formwork or wedging of the vibrator head between reinforcement bars. If the vibrator head becomes wedged or entangled, do not pull on the hose.

• Store the power tool in a safe place. Ensure that it cannot fall over. The power tool may become damaged if this happens.