Ambient Weather Support

If your barometric pressure reads a very large number, such as 1000, it means that you accidentally changed the barometer units of measure from inHg (default) to hpa or mmHg.

To enter the calibrated relative pressure into the console, you must enter the SET mode. To enter the SET mode, press and hold the SET button for two seconds, and press SET  eleven more times until the pressure flashes. This setting allows you to change the units of measure from inHg from hpa, mmHg to inHg.

Press [WIND +] or [PRESSURE -] to change the units of measure.

Reference Section 6.4.4 of the User Manual below for details on calibration of relative pressure:

The settings are summarized below.