Calibration is used to determine accurate calculation of leak rates and is an important part of system operations. With auto calibration, the calibration sequence is performed automatically. The system calibration values for the chamber are based on dynamic test results obtained during a series of cycles with the calibrated leak valve closed and a series of cycles with the calibrated leak valve open. Auto Calibration is initiated via the CAL key on the console control panel. Refer to the Console Control Panel for more information.