MGL Avionics Stratomaster Ultra Horizon XL Owner’s manual
Page 52
The hobbs meter shows your engine running time. The hobbs meter is presetable to your
current engine time (User setup menu). Engine running time accumulates when the engine
revs is above the “hobbs revs” as defined in the “Basic setup menu”. This setting allows you
to ignore idle time if you so wish.
MAINTENANCE METER
The maintenance meter is a “hobbs meter in reverse”. You set the meter to your desired
engine maintenance interval (for example 50 hours) in the “user setup menu”. When the
meter has counted down to 0 hours, your maintenance is due.
GCR (Glide or climb ratio)
Briefly mentioned in the VSI description, the glide or climb ratio shows your current ratio
between true airspeed and vertical speed. This reading can be used to optimize your
aircrafts glide or climb ratio.
Operating the Ultra Horizon
This describes how to use the buttons in flight whenever you see the mail screen as shown below
Increase or decrease the display contrast to adjust the display quality to best possible setting. If
operated at temperature extremes, this should be done whenever the temperature changes by a
large amount.
Increase or decrease local pressure setting as directed by air traffic control or to get the correct
altitude at you local airfield.
Enter the main menu as required.
If the checklist is not active, pressing and holding Select for 5 seconds will simulate a total
instrument failure for training purposes.
Pressing “Next” will send a command to the SP-3h or SP-3hc sensor to instantly level the
horizon. This can be used if the horizon is showing incorrectly after extended manouvering and
you do not want to wait for internal error correction to do its work. You need to fly straight and
level to use this function properly.
Enter the
main menu
Hold for 5 seconds to
simulate total instrument
failure (training aid only)
Set horizon level
Set or cancel pitch
offset on horizon
Increase local
pressure
setting
Decrease
local pressure
setting
Increase
screen
contrast
Decrease
screen
contrast
