Calibration

TopicId206

The purpose of calibration

Calibration of the CervicalTest instrument can be done before the examination.

The purpose of calibration is to set the instrument in the place in which the examination is to be carried out.

See also Influence of magnetic fields on the CervicalTest instrument.

The instrument detects the rotation of the patient's head, using the earth's magnetic field.

The earth's magnetic field varies and is subject to errors due to the geographical position and setting in which measurements are taken. Calibration is therefore required to detect and correct these influences

When calibration needs to be done

Calibration must be done in the following cases:

When using the CervicalTest instrument for the first time.
After prior incorrect or incomplete calibration.
After physically changing the measuring place, for example, after moving from one consulting room to another.

The CervicalTest instrument saves the calibration and retains it even when the power supply to the instrument via the USB cable is interrupted.

How calibration is done

See also Influence of magnetic fields on the CervicalTest instrument.

Calibration is done in the following steps:

Start the calibration procedure using the Calibration button.
Slowly rotate the instrument through 360° on all three axes of three-dimensional space (see the next chapter).
End calibration by pushing the Stop button

Rotation on the three axes in space

The three axes in three-dimensional space are usually represented by the letters: X, Y and Z as illustrated in the image below:

The three axes of three-dimensional space

Slow rotation through 360° of each of the three axes is illustrated in the images below:

Rotating the X axis through 360°	Rotating the Y axis through 360°	Rotating the Z axis through 360°