#### Parcentricity Calibration Modes

There are three modes for parcentricity calibration:

- Mode 1: This mode uses concentricity data from the fovcert.dat file. If a fovcert.dat file exists and contains concentricity certification data then PC-DMIS will use this calibration mode.

- Mode 2: This mode measures the series of circles and links together the circles in order to automatically correct for any concentricity error in the standard. If there is no concentricity data in the fovcert.dat file, and the ProbeQualVisionParCalibrationUseBridging registry entry (located in the USER_ProbeCal section of the Settings Editor) remains at its default setting of TRUE then this mode will be used.

- Mode 3: This mode measures the standard concentric circles and assumes they are perfectly concentric. If the fovcert.dat file doesn't contain concentricity data, and the ProbeQualVisionParCalibrationUseBridging registry entry is set to FALSE then PC-DMIS will use this calibration mode.

A related registry entry, ProbeQualVisionParCalibrationXYSamples, located in the same section of the Settings Editor, defaults to 3. This defines the number of times a given circle is measured at a given magnification during the parcentric high calibration.