'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.
What's the difference between adjust and calibrate? Prover is a device which helps us to know the 'K' factor (multiplication factor) for a metering unit (flow meter). Calibration is the process in which we minimize the error in the measuring device using a calibrator or prover.