Transponder Operation
SkyView HDX Pilot’s User Guide – Revision B 6-9
CLR TMR (System Timers Control)
The CLR TMR icon on the ENGINE menu is used to reset two system timers maintained by
SkyView HDX: Engine Trip Timer and the Flight Trip Timer. Pressing the CLR TIMER resets both
these timers to 0 hours.
System Timers
SkyView has internal tach, Hobbs, and other timers that each run at different times. ENGINE
timers are available for placement on the Engine Pages via the Screen Layout Editor. For more
information regarding the Screen Layout Editor, reference the SkyView Classic / SE / HDX
System Installation Guide.
Engine timers are displayed at 1/10 hour increments.
Tach Time – labeled TACH when displayed on an Engine Page, is a measure of engine time
normalized to a cruise RPM. The cruise RPM parameter must be set properly in the system
setup to generate a correct tach time
Hobbs Time – labeled HOBBS when displayed on an Engine Page, is a simple timer that runs
whenever the oil pressure is above 15 PSI or the engine is above 200 RPM. It essentially runs
when the engine does.
The Engine Run Timer – labeled RUN TIME when displayed on an Engine Page, is a Hobbs style
timer that records the time your engine has been running during your current flight. It resets
the first time the engine is started after SkyView is powered on. This allows you to view your
previous flight’s Engine Run Time any time before you start your engine before a flight.
The Engine Trip Timer – labeled TRIP RUN when displayed on an Engine Page, is a Hobbs style
timer that records the time your engine has been running. Unlike the Hobbs time, it can be
reset by pressing ENGINE > CLR TMR.
The Total Air Timer – labeled AIR TOTAL when displayed on an Engine Page, runs any time that
SkyView determines that the aircraft is in flight. SkyView uses the presence of significant
airspeed or GPS speed to decide whether the aircraft is flying. This timer can only be reset or
adjusted in the Aircraft Information menu within SkyView Setup. See the SkyView Classic / SE /
HDX System Installation Guide for information about using SkyView HDX’s Setup Menu.
The Air Timer – labeled AIR TIME when displayed on an Engine Page, runs any time SkyView
determines the aircraft is in flight. SkyView uses the presence of significant airspeed or GPS
speed to decide whether the aircraft is flying. Resets as SkyView detects that the aircraft has
transition to “in the air” This time is also optionally used to calculate the Switch Fuel Tank
Reminder.
The Air Trip Timer – labeled AIR TRIP when displayed on an Engine Page -runs any time that
SkyView determines that the aircraft is in flight, just like the Total Flight Timer. Unlike the Total
Air Timer, it can be reset by pressing ENGINE > CLR TMR.
A Switch Fuel Tank Reminder can be configured to alert you to switch their fuel tanks at a set
time or fuel usage interval (based on the fuel computer’s fuel calculations). When enabled, it
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