MD23-215
User Guide
Mid-Continent Instruments and Avionics
5
User Guide UG215, Revision 1
December 9, 2021
4.1 OPERATION
For operation of standard unit functions, including the Options Menu, manual brightness control,
Info page, and others, please refer to the IM.
4.1.1. PRIMARY DISPLAY PRESENTATION
In Flight Mode, the display is presented as shown in the example figures below.
Power on screen
Normal Operation
(example)
Primary Function elements are defined as follows:
•
Dial: Numbers from 0 to 9, clockwise with major grads that represent 100 units (feet or
meters) and minor grads that represent 20 units.
•
Pointer: Rotates clockwise with increasing altitude, counter-clockwise with decreasing
altitude. If the altitude is below zero, the pointer will remain at zero and both the pointer
and altitude value will turn amber. The pointer will not appear with invalid altitude (out of
range or unit failure).
•
Counter Drum window: Displays the altitude as a numeric value. The tens value is
displayed in an expanded window with rolling numbers representing every 20 units. The
hundreds, thousands, and ten-thousands digits will change with a similar rolling action at
each increment. Invalid altitude will be represented with red dashes (- - - - -). Negative
altitude will be represented with amber numbers and a negative sign (-) in the ten-
thousands digit location.
The altitude units, as selected in the Configuration Mode, is displayed above the window.
•
Barometric Pressure window: Current and correct altitude can only be displayed when
adjusted in accordance with the existing barometric pressure conditions. To do this,
simply turn the Control Knob to enter the current barometric pressure. The range is from
27.50 to 31.50 In Hg or 930 to 1070 millibar (mbar)/hectopascals (hPa), depending on
the selected units as displayed in blue below the Baro window.
