'Wet' snow vs. 'dry' snow. The size and make up of a snowflake depends on how many ice crystals group together and this will be determined by air temperatures. Snowflakes that fall through dry, cool air will be small, powdery snowflakes that don't stick together.
What is calibration? Calibration is the activity of checking, by comparison with a standard, the accuracy of a measuring instrument of any type. It may also include adjustment of the instrument to bring it into alignment with the standard.
The Tool Calibration and Control System is an overarching system within your Quality Assurance Management Systems. It is required for ISO 9001 registration. Ensuring your measurement instruments are measuring correctly is important to maintaining your process and product quality.