MGL Avionics Stratomaster Ultra “L” Owner’s manual
Page 19
ALTITUDE ALARM
The Stratomaster Ultra will warn you once your aircraft's altitude exceeds a
predetermined level. (Refer altitude alarm page 40) by flashing the altitude display field.
The altitude will remain flashing until the aircraft descends below the predetermined
altitude.
Altitude alarms can be set in increments of 500 ft (152.4m) to a maximum of 60 000 ft
(18 287 m). When setting the alarm all factors should be taken into account. It is the
pilot's responsibility to ensure that the alarm is correctly set prior to take-off.
The altitude alarm can be switched off should you wish not to make use of this function.
(Refer altitude alarm page 40).
An active alarm will result in the Stratomaster Ultra alarm output switching at a rate of
once per second. This is normally used to switch a warning lamp or indicator in the
cockpit. The indicator will flash until the alarm has been acknowledged or the alarm
condition no longer exists. To acknowledge the alarm, press any key. This will switch off
the alarm indicator but the display field will continue flashing until the alarm condition no
longer exists.
TEMPERATURE ALARMS
The Stratomaster Ultra will warn you once your aircraft's engine temperatures exceed
predetermined levels (Refer engine detail setup page 52). Alarms can be set on items
such as water or oil temperature, EGT and CHT temperatures. Selecting on of the engine
type quick selects will set the alarms to the recommended levels for the selected engine
(See Engine quick select menu).
Alarms are shown by flashing the relevant bargraph and activating audio and relay
contact pulsing. Any temperature alarms active will remain flashing until the temperature
drops below the alarm level. Acknowledging an alarm will only stop the external alarms,
not the flashing bargraphs.
Temperature alarms cannot be switched off. If you would like to disable an alarm, set its
alarm level to a very high value (Engine detail setup).
An active alarm will result in the Stratomaster Ultra alarm output switching at a rate of
once per second. This is normally used to switch a warning lamp or indicator in the
cockpit. The indicator will flash until the alarm has been acknowledged or the alarm
condition no longer exists. To acknowledge the alarm, press any key. This will switch off
the alarm indicator but the display field will continue flashing until the alarm condition no
longer exists.
SPEED LOW ALARM
The Stratomaster Ultra will warn you once your aircraft's airspeed falls below a
predetermined level (Refer speed low alarm page 40) by flashing the ASI (TAS) display
field. This display field will remain flashing until the aircraft's speed increases to above
the predetermined speed. When landing the speed low alarm will also flash but only for
as long as the aircraft is deemed to be in flight e.g. for 30 seconds. (Definition of in flight:
When the airspeed decreases to below 20 mph, 32 kph or 17 knots for longer than 30
seconds).
Speed alarms can be set in increments of 1 mile, 1 knot or 1 kilometer. The minimum
speed, which can be entered is 20 mph, 32 kph or 17 knots and the maximum speed
which can be entered is 120 mph, 193 kph or 104 knots. When setting the alarm factors
