○ User ● Specialized personnel
Form and structure of the shackle:
The shackles should be examined regularly by a qualified person. The time interval from one
check to another depends on how much the instrument is used, but it is recommended to not
exceed six months.
Therefore, one must:
- always inspect the shackle before use;
- carry out regular visual inspections to look for nicks, cracks, wear or damaged areas,
damaged threads on the pivot and body; if it is necessary, carry out a magnetic test or non-
destructive testing;
- keep a file in regards to the accessory sheet and keep track of the checks;
- the shackles which do not fully or partially satisfy the requirements, must be discarded.