Procedure to view the timing for the next calibration and bump test for G8.

1. From the Gas info menu, scroll to, then select Next due dates by pressing the center button.
   
   The next due date screen opens, displaying the next date calibration and bump testing are due for your device sensors. If your device is overdue for calibration or bump testing, the sensor status displays as OVERDUE.
2. Press the center button to close the screen and return to the Gas info menu.