General Tools and Instruments DA833 - Manual (Page 6)

GB
6
6. Press [ALT] again, the unit will return to the Normal
Altitude display.
Altitude Calibration
If the altitude on the display is different from the actual current
altitude, the unit can be manually calibrated to reflect the true
altitude level.
To calibrate the altitude:
1. In Normal Altitude Display.
2. Press and hold [ALT] and [TIME] simultaneously for about 2
seconds. The CAL Hx indicator shows on the display and the
current altitude digits start flashing.
3. Press [+] or [-] to adjust the altitude reading by 1 m. For rapid
acceleration of measurement adjustments, press and hold.
4. Press [ALT] to confirm and return to the Altitude Display.
Example:
Point C: A point where the altitude, as indicated by a marking
stone or post, is 1500 m. At this point set the current
altitude to 1500 m.
( 2 hours per column )
Note: The unit will return to Normal Altimeter Display if no
buttons are pressed for one-minute during the calibration
sequence.
Units of Measurement for Altitude
Altitude measurements can be displayed in feet (ft) or meters (m).
To change the altitude units of measure:
1. In Normal Altitude Display.
2. Simultaneously, press and hold the [+] and [-] to select
between meters or feet.
About The Altitude Change Graph
In Normal Altitude Display, the DA833 graphically display
altitude levels at 2-hour time intervals for the past 12 hours. Each
vertical bar on the altitude graph represents a 2-hour time period.
Each horizontal line represents pressure changes equal to + /-
200-meters.