| 摘要 |
<p>The invention relates to a power meter comprising a printed circuit board (1), a battery supply device for electrically powering said printed circuit board and a lid (2) for the protection thereof, wherein the supply device comprises a support (4) on which a battery (5) is detachably arrangeable, said protective lid (2) comprises an opening (3) through which the support is insertable and means (20, 21, 22) interacting with the support in such a way that the battery (5) is placeable in two distinct positions with respect to the printed circuit board (1), i.e., the battery (5) is not electrically connected to the printed circuit board (1) in the first storing position and the battery (5) is brought into contact with the printed circuit board (1) in the second operating position.</p> |
