5
1 General Operation
MicroTim XB is turned on by holding the key until ‘boot’ appears on the display and release the key. All of
the configuration instructions in this manual assume MicroTim XB is already turned on and running.
The sealevel altitude (ASL) is displayed when no key activity has occurred in the past 5 seconds.
The barometric pressure setting corrects these altitude readings for weather changes and is set by single
press/releases of the altitude keys . The default barometer setting is 2992 (29.92 inHg).
1.1 Altitude Display Modes
MicroTim XB can be configured to display:
• ASL (default). Unsigned number. Arrow indicates negative readings (below sealevel).
• AGL (Altitude above Ground Level). Sign (+/-) is displayed to show altitude above (+) or below (-) the
location MicroTim XB was last zeroed at.
• Both AGL/ASL alternately every 2 seconds.
To change the display mode, hold the display key for 5 seconds then release. MicroTim XB will then flash the
selected display mode (ASL, AGL, BOTH) for 5 seconds.
1.2 Units
MicroTim XB displays altitude in feet and barometric pressure in inches of mercury by default. Three sets of units
are available:
1) Altitude in feet, barometric pressure in inches of mercury (default).
2) Altitude in meters, barometric pressure in kPa.
3) Altitude in feet, barometric pressure in millibars.
To change units, hold the units key for 5 seconds then release. MicroTim XB will then flash the selected unit
pairing (FEET, METR, FTMB) for 5 seconds.
After 20 minutes of inactivity (no key activity or significant altitude changes) MicroTim XB powers down. To
restore normal operation, press and hold the key until ‘boot’ appears on the display.
1.3 Restoring Factory Default Settings
By default, MicroTim XB is in altimeter mode, displaying ASL in feet and barometric pressure in inches of
mercury.
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