Mid-Continent Instruments and Avionics, Wichita, KS
REV. B, October 31, 2012 25 Manual Number 9017782
the altitude tape of the current altitude. Altitude units appear below the altitude window
and can be changed during Flight Mode using the Options Menu (see Section 3.3.2).
The altitude tape is a vertical scale along the right margin of the display. The current
altitude is always in the middle of the tape and indicated by the triangular pointer on the
right side of the altitude window. The tape has numeric indications every one-hundred
(100) units with minor graduations every fifty (50) units and sub-graduations every
twenty-five (25) units. In horizontal installations, the tape spans approximately 400 units
from top to bottom and in vertical installations, the tape spans approximately 500 units
from top to bottom. The tape will ‘roll’ or scroll to assist in quick reference as to the
increasing or decreasing nature of the aircraft’s altitude.
The barometer window shows the currently set barometric pressure, is identified by the
abbreviation “BARO” and is located at the top center of the airspeed/altitude display.
Setting the current barometric pressure compensates the altitude for the appropriate
environmental conditions. The barometric setting can be adjusted with a simple turning
of the control knob while in Flight Mode. When adjusting the barometric pressure, the
window will increase in size and the digits will turn green. When finished setting the
pressure, the window will return to its original size and color. Barometric pressure units
can be selected during Flight Mode using the Options Menu (see Section 3.3.2).
The altitude trend bar is located along the right margin of the altitude display. This
feature is optional and can be turned on or off using the Options Menu (see Section
3.3.2). The trend bar is magenta in color and originates at the current altitude on the
altitude tape (always from the middle of the display, directly across from the altitude
pointer). The height of the trend bar, above or below the current altitude, indicates the
altitude of the aircraft on the altitude tape if the current vertical speed or ‘altitude trend’
is maintained over a period of six (6) seconds. For example, in Figure 3.5, the current
altitude is approximately 9,315 feet. The trend bar is at approximately 9,325 feet,
indicating that the aircraft’s altitude will be 9,325 feet in 6 seconds if the current vertical
speed or climb is maintained constant. The length of the trend bar will increase with
increased dive or climb rates and approach zero or disappear entirely as the vertical
speed reaches zero in level flight.
3.3.1.3 AIRSPEED OPERATION
FIGURE 3.6
airspeed window
airspeed units
airspeed scale/tape
range markings
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