All inspection, measuring, and test equipment that can affect or determine product quality. This means that if you are using the instruments to verify the acceptance of a product whether to pass or fail based on the measured value you have taken, the instrument should be calibrated. .
Equipment which, if out of calibration, would produce unsafe products.
Equipment that requires calibration because of an agreement. An example is a customer, where before progressing into a contract, they need to ensure that the equipment that will produce their product is calibrated. .
All measuring and testing equipment (standards) affecting the accuracy or validity of calibrations. These are the master standards, go-no-go jigs, check masters, reference materials, and related instruments that we used to verify other instruments or measuring equipment for their accuracy.