Frequently Asked Questions
Clocks
Accurate timekeeping is essential for IFR operations, fuel management, and ATC communications. CHRONOS® Series Digital Clocks offer up to eight modes, including Local Time, UTC, Flight Timer, Countdown Timer, Stopwatch, Voltmeter, OAT, and Secondary Air Temp. The clocks feature integrated USB-C and USB-A ports, delivering up to 60 watts for charging personal electronic devices. With manual and automatic lighting control, programmable dimming curves, and an internal field-replaceable backup battery, CHRONOS clocks are an ideal drop-in replacement for aging mechanical units.
An internal, field-replaceable battery maintains time and Flight Timer memory without aircraft power.
Yes, if the clock is set not to reset, like a traditional Hobbs meter, you can log engine run-time. However, the clock does not take the place of the Hobbs meter.
To activate the Flight Timer, a ground or aircraft power signal must be supplied to the Flight Timer Enable Pin. This can be provided from an event-based relay (such as engine start or weight off-wheels), or it can be connected via jumper to the power or ground pins of the unit to activate On Unit Power. The decimal point will blink briefly every 2 seconds to indicate that the Flight Timer is active. Flight time is displayed in hours and tenths of hours up to 99999.9 hours. The Flight Timer maintains the accumulated time, but does not run, when power is off.
Two Flight Timers are available on the CH93. The default Flight Timer is a resettable timer. Pressing and holding the MODE button for two seconds will reset the timer. If the Flight Timer Enable signal is active, the Flight Timer will reset to zero and resume counting. Pressing and holding the “-“ or “+” button will display the non-resettable Flight Timer for keeping total cumulative flight time. Releasing the “-“ or “+” button will return the display to the resettable Flight Timer.
Note: The non-resettable timer value can be set or reset at the factory only.