| 摘要 |
The invention relates to a digital burette, having a manual drive for suctioning and applying an adjustable dose volume, a gear unit connected downstream and a digital display device controlled by said unit for setting the dose volume. The control comprises an incremental encoder functionally connected to the gear unit, at least one sensor for detecting the signals produced by the incremental encoder and a processor connected to the sensor and the display device for calculating the dose volume corresponding to the number of signals. A sector disk with two groups of sectors of different magnetic field strength that are alternately arranged in the direction of rotation of the sector disk is especially provided as incremental encoder. A sensor detects the number of revolutions of the sector disk. In order to save energy, power supply of the burette is ensured by a solar cell or two spaced sensors for detecting the number of revolutions of the sector disk are provided to reduce the clock frequency of the processor with the same measuring accuracy. The invention also relates to a method for displaying the dose volume in said digital burette. |
