If any of you are still tuned in to this topic for what its worth, could I suggest that ASME for you or BS for British Standards Institute or JIC for Japanese Standards or EN for European Standards or DIN for German Standards or finally AS for Australian Standards Institute. Got the picture?
Are you thinking of writing calibration standards for in-house use within a particular company?
If you are, please forget it. Most of those standards organisations I mentioned, I am confident, have already addressed the issue.
Better still what about ISO. If you want to deal with the world, sell your product internationally, it's almost compulsory to comply with ISO quality approved standards (ISO 9000,9002,9003)
Without knowing precisely what is meant by calipers I can't comment.
Are bevel protractors adjustable?
And are vernier calipers adjustable?
Even the term "calibration" has precise meaning look to the standards.
Good Luck.