Pentax G6 User Manual page 13

Tips: 1. In order to make sure the accuracy, don't replace battery during
calibration
2. The pole should be set on the same point during all of the steps.
(1) Horizontal Calibration
Horizontal calibration is actually calibrating the E-bubble. Click "Adjust—Sensor
Calibrate—Horizontal".
Enter horizontal calibration interface, you will see an electrical bubble in the
screen. Center the carbon pole, make sure the physical bubble of the pole is in center
place, then click "Adjust" in the screen. It has a prompt tone which means the
horizontal calibrate is finished.
Tip: Before calibrate, when physical bubble is in center, the E-bubble may be not,
it's normal. Because the sensor has deviation before calibrate. But after calibration,
the physical bubble and E-bubble will be in center together.
Figure 2-1
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