Re: Must a vernier caliper and a rule be calibrated?
Taking a look at the attachment, its a metal measuring tape which is said, which has a small L bend at user end. Typically this L bend is 1 mm thick and is hooked to have a play of 1 mm. Depending on the type of measurement (butt in or butt out) you still get the desired reading at the place where you intend to take the measurement.
I have used one such for a critical length measurement of a vacuum formed ABS bed, and in this case as the L bend comes to use regularly, we have got the tape calibrated from source ( to our desired measure) and have discarded the tape after three months of use. No recalibration what so ever as its better and cost effective to get a new tape with calibration from source.
Hope this gives you a lead
http://www.istockphoto.com/file_thu.../2/istockphoto_6325609-yellow-metal-meter.jpg
this photo for meter i mean
this photo for meter i mean
I have used one such for a critical length measurement of a vacuum formed ABS bed, and in this case as the L bend comes to use regularly, we have got the tape calibrated from source ( to our desired measure) and have discarded the tape after three months of use. No recalibration what so ever as its better and cost effective to get a new tape with calibration from source.
Hope this gives you a lead
on the OP's original question: