Paragraph Number

11

Implementations may include one or more of the following features. The surgical device where the electronic circuit enters the calibration mode in response to activation of the zeroing switch. The user interface may include: a first light configured to indicate that the orientation angle is outside a range of desired orientation angles; a second first light configured to indicate that the orientation angle is within a range of desired orientation angles; and a third light configured to indicate that the orientation angle substantially at the desired orientation angle.

Added by DJM 1 2022