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Think of your EDM-930 as your personal flight engineer. Always there, working in the background, constantly watching over your engine while you concentrate on flying the aircraft. Your EDM-930 will be monitoring your engine conditions four times per second and will warn you instantly if any measurement exceeds the programmed limit.
RPM and MAP Section Display The upper semicircular bar graph shows the RPM (Revolutions per Minute) and the lower semicircular bar graph shows the MAP (Manifold Pressure). These are shown both graphically and digitally. Power settings entering red line are displayed by flashing the ALERT icon and flashing message on the bottom left scanner section of the screen. Percent horsepower is displayed digitally underneath the MAP arc. Bar Graph Section Display The Bar Graphs section contains nine dedicated 12 segment bar graphs with digital display. The default displays are (left to right, top to bottom): Basic Scanner Operations Let’s examine the scanner section analog display. Central to the display is the exhaust gas temperature— or EGT— bar graph presentation. The height of each column represents the EGT. The last column shows turbine inlet temperature. The range of the EGT columns is red line at the top down to one half of red line at the bottom. This is called the percentage view because you are looking at a percentage of red line. The Normalize view allows you to see small, subtle changes in temperature. When you change to the Normalize view—hold the Lean Find button for three seconds all column heights are set to the identical half-height. Any changes are shown as an increase or decrease in column height. A one-bar change in column height represents a 10 degrees change. The Normalize view permits rapid visualization of EGT trends, rather than a percentage of red line. The missing segment in the column represents the cylinder head temperature. Above each column is a number corresponding to the engine cylinder number. The rightmost column displays turbine inlet temperature. Beneath the bar graph is the alphanumeric display. A single index dot above one column indicates which cylinder is being displayed on this numerical display. When the index dot is beneath a cylinder number, 1 through 6, the digital display shows the EGT on the left four digits and the CHT on the right three digits. Two other derived measurements are shown in this display: · The difference between the hottest and coolest exhaust gas temperatures.
EGT EGT is shown on the first four or six Scanner bar graph columns. These are labeled 1 through 4 or 1 through 6 above the columns. The lower limit of the graph range represents half of the TIT alarm red line (default is 825°F) and the top of the range represents alarm red line (default 1650°F). The numerical value of the EGT is shown on the left side of the digital display for each cylinder when there is a dot under one of the cylinder numbers above the column—cylinder 2 in this example. There are two views: Normalize view levels the EGT columns and increases the sensitivity of the Scanner bar graph columns to 10° per segment. To enter the Normalize view, hold the LeanFind button for three seconds. The NRM icon will be displayed above the Scanner section. Hold the LeanFind button for three seconds to return to the Percentage view. CHT The Cylinder Head Temperature—CHT—is represented by a missing segment in the Scanner bar graph column. If the EGT is too low for there to be a missing segment, the CHT is represented by a lone segment in that column. The scale is shown to the left side of the columns. The numerical value of the CHT is shown on the right side of the digital display for each cylinder when there is a dot under one of the cylinder numbers above the column.
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