DALT55 INSTRUCTION SUPPLEMENT
61-101-02184_02186-B Page
7/14
Jan /10 /2013
5. OPERATION
5.1
Powering On (Initialization)
After pressing the ON/OFF switch, the unit will display the initialization
screen with company name and equipment description. A second screen
will display the part number and calibration orientation (Figure 2). The unit
will then display a message indicating if the power automatic off feature is
disabled or enabled (if the auto-off is enabled, the instrument also shows
the amount of time until the unit shuts off). (Note: The manufacturer’s
default setting is disabled.) The instrument then begins a series of initial
value calculations for altitude and, if applicable, establishes the link
between two instruments. Also, the date of last calibration is read.* If no
errors are detected during power up, the instrument enters normal mode
and the Aeronautical display appears.
NOTE: There is a delay of several seconds before start-up sequence
appears and the unit initializes. For two-instrument operations, turn
on
DALT55
at the same time as
DAS650
. (A message appears
showing the link is successful. If DAS650 is not on, the instrument
displays a message that reminds the user to do so.)
* If the current date is within 30 days of the one-year anniversary of the last
calibration date, a message tells the user when the next annual
recalibration is due. However, if the current date is after the annual
recalibration due date, the message tells the user “recalibration period
exceeded”.
FIGURE 3 AERONAUTICAL DISPLAY
Displays simulated pressure
altitude in relation to 29.921 inHg
barometric pressure at sea level
Serial link indicator. Shows unit is
ready for two-instrument operation.
Flashes when link is lost
Displays vertical speed
Battery or “AC” indicator.
Flashes when battery level is
too low for safe operation.
D A L T 5 5
1,000
250
LEAK
MENU
ft / min
ft
