| 摘要 |
The invention relates to a vacuum cleaner and a method at the vacuum cleaner of calibrating a digital pressure switch configured to measure pressure over a dust container of the vacuum cleaner to determine whether the dust container is full. A method at a vacuum cleaner, being capable of being operated in at least a lower-power mode and a higher-power mode, is provided for calibrating a digital pressure switch configured to measure differential pressure over a dust container of the vacuum cleaner to determine whether the dust container is full. The method comprises increasing speed of a suction fan configured to transport debris into the dust container from zero up to a value of a lowest fan speed defined in the lower-power mode, with the dust container being full, and registering speed of the suction fan at a moment of the digital pressure switch triggering, the digital pressure switch having been set to trigger at a measured pressure value being reached before the fan speed has been increased to attain said value of a lowest fan speed. |
