Oregon Scientific RX109 Accessing the Altimeter Options, SET Current Altitude and Resolution

•Maximum / minimum altitude alert (sounds an alarm when exceeded)

•Maximum / ascending, maximum descending speeds

•Current vertical speed

•Rate of altitude change

The altitude is shown it two ways, as a numeric value indicating your current altitude, and as a bar chart indicating changes in altitude. Both values will change as you move about.

NOTE In ALTI-BARO Mode, the current altitude is always displayed in larger font, in every screen except the sea pres- sure-setting screen.

ACCESSING THE ALTIMETER OPTIONS

Press MODE to access the ALTI-BARO mode, then press SELECT/+ to loop through the options.

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SET CURRENT ALTITUDE AND RESOLUTION

When you first use the watch, it is important to set the current altitude and local sea-level pressure so your ascending and descending altitude can be accurately measured. You can find the current altitude by comparing your position to a topographical map, and then entering the value in the watch.

NOTE It is necessary to reset the altitude after being in a pressurized chamber (such as an airplane).

For instructions on setting the sea-level pressure, refer to the next section.

Diagram	Instructions
	1.	Press and hold FUNC/SET for 2 seconds while in
		ALT mode.
	2.	Use SELECT/+ or ST/SP/- to change the value.
		The value will change in unit increments based on
		the resolution you set (next step) and the measure-
		ment unit you selectedwhensetting the CLOCK(➔
		9).
	3.	Press FUNC/SET to switch to the Resolution set-
		ting screen, then press ST/SP/- to change the
		value. The resolution is the increment at which the
		altitude will display: 3 / 10 ft, or 1 / 3 meters.
	4.	Press FUNC/SET to exit the setting mode.

Tip: You can also set the current altitude and alarm limits with the help of the PC software (see PC section). (RP109 only)

NOTE The sea level pressure reading will change if the altitude is adjusted.

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