General Tools and Instruments DA833 - Manual (Page 7)

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Point A: At this point, reset the Altitude Change Memory to 0 m.
/ ft. The DA833 will immediately start recording new
changes in altitude.
Point B: At this point, check the Altitude Change Memory. The
unit will display the net vertical difference between
point A and point B.
Clearing Altitude Memory, Max / Min Altitude
Memory, and Vertical Ascent / Decent Memory
Altitude related memories are cleared sequentially. During the
sequence, correct information can be bypassed by pressing [ALT].
Note: To clear the maximum altitude reached memory, first
enter MAX Altitude Display. Alternately, enter MIN Altitude
Display to clear the minimum altitude reached memory.
To clear Altitude Mode Memories:
1. Enter Altitude Max (or Altitude Min) Display.
2. Press and hold [ALT] for about 2 seconds, the change-in-
altitude digit flash.
Note: To bypass any section without making changes to the
memory, press [ALT].
3. Press [+] or [-], the change-in-altitude digits will reset to 0
m./ft.
4. Press [ALT], and proceed to the maximum (orminimum)
The Altitude Change Graph is viewed in all the Altimeter Mode
displays.
Altitude History Display
In addition to having altitude information displayed as a graph,
altitude history can also be displayed numerically.
To numerically display previous altitude levels:
1. Enter the Altitude History Display
2. Press [+] or [-] to display the corresponding altitude history
for a specified time period up to –12 hours.
About Altitude Change Memory
The DA833 can monitors the change in altitude between two
points. The unit displays the net vertical difference between
points of a descent / ascent. Upon clearing the altitude memory,
the current altitude reading is used as a base from which the unit
starts recording changes.