GH-3100
Installation & Operation Manual
Page 5-14
Operation
TP-559
March 30, 2017
Revision K
When ALTITUDE DISPLAY ROLLING DIGITS is configured for ON, the right two digits of the
altitude digital readout are paired in 20-foot increments, and the altitude digits “roll” inside a modified
box. The rolling correspond to the altitude with an “odometer” style with all digits rolling downward for
increasing altitude. The hashed box placeholder rolls into and out of position as the digits transition
between 9,980 and 10,000 feet, and the minus sign rolls with the leading digit for transitions between -
980 and –1,000 ft. The altitude digital readout box is expanded vertically above and below the two least
significant digits to allow two vertically consecutive “rolling digits” data to be in the box (refer to Figure
5-7C). The axis of the altitude digital readout "rolling digits" is centered vertically in the box.
When METRIC ALTITUDE READOUT is configured for ON, a second altitude digital readout is shown
below the altitude-in-feet digital readout as shown Figure 5-7D using the colors used to draw the altitude-
in-feet digital readout. The metric altitude digital readout consist of up to five medium sized, right justified
digits followed by the letter “M” and be capable of displaying altitudes from -305 to 15,240 meters rounded
to multiples of 3 meters. Negative numbers are shown with a right justified minus sign (“-”). The minus
sign appears when the altitude is less than 0 meters. For positive altitudes less than 10,000 meters, a hashed
box is shown as a “place holder” in the ten thousands place of the metric altitude digital readout.
When METRIC ALTITUDE READOUT is configured for ON and the climb/descent rate is greater than
3250 feet/minute, the tens and ones digits of the metric altitude digital readout is replaced with dashes to
enhance readability. The digits are returned to the digital readout when the climb/descent rate goes below
2950 feet/minute.
5.2.4.1.3 Digital Barometric Correction Readout Format
The digital baro correction readout is shown in a box positioned at the top of the altitude tape, at the right
side of the display. The box is black with no border.
The digital baro correction digits and descriptor letters are medium sized and color configured to either
white or cyan.
The pilot may select the desired type of descriptor shown using the menu mode. The following are the
possible selections along with a description of each:
•
IN HG: Displays in inches of mercury to the nearest hundredth, followed by the letters “in” (refer to
Figure 5-7A).
•
HPA: Displays in hectopascals, followed by the letters “hPa” (refer to Figure 5-7C
)
.
•
MB: Displays in millibars, followed by the letters “mb”
(
see Figure 5-7B or D).
