Gentec-EO QUAD-4Track - Manual (Page 24)

QUAD-4Track User’s Manual Revision 2.1 24
The Calibration Display has Controls and Indicators related to calibrating the beam
position.
To use the Beam Position Calibration, first make sure that the instrument is triggered and
measuring. Press the Calibrate Beam Position button. The software will request you to
place the beam at a series of five positions on the X axis. A measurement will be taken at
each position and the resulting data will be used to fit a 7th order polynomial. The results
of the curve fit will then be used to correct the Beam Position display if the Use
Calibration control is active.
Controls
The controls are Calibrate Beam Position, Save Coefficients, and Recall Coefficients.
Calibrate Beam Position
Pressing this button calls the Beam Position Calibration routine. The used will be asked
to set the beam position to a set of X axis values determined by the sensor radius. At each
position the measured displacement and the set displacement will be recorded. When all
measurements are taken, a 7th order polynomial curve fit will be done to determine the