Version 15.0 AF-5000 Series Pilot Guide 111
EGT/CHT Display Modes
Cylinder Head Temperatures (CHT)
Exhaust Gas Temperatures (EGT)
All cylinders are continuously displayed in both analog and
digital formats. The cylinders are laid out sequentially with
cylinder #1 on the left followed by cylinder #2 to its right
and so on. The graph uses small white bars for the CHT
that are superimposed onto the larger EGT bars. The
graph uses a dual scale that represents the CHT scale on
the left side and the EGT scale on the right. The digital
reading for each column is displayed above each bar for
CHT and below for EGT. During normal operation the EGT and CHT bars will align themselves in a very
easy to recognize pattern.
Leaning EGT Mode (Peak Detect)
The leaning peak detection mode is selected from the main screen by pressing the [ENGINE] -> [PEAK]. As
the engine is leaned, the EGT bars for all cylinders will rise. As each cylinder reaches peak EGT, a tattletale
marker will appear at the top of that cylinder’s bar. The current EGT is shown on the bottom of the bar, Peak
EGT is displayed on the top and the degrees rich or lean of peak are displayed on the bar. If the mixture is
enrichened before all cylinders have peaked, the unit will detect the EGT drop and display a false peak. The
peak detection can be reset at any time by pressing [RESET] when PEAK is selected.
Warning: Never lean the engine with power settings beyond the factory recommended
level (generally 65% to 75% power).
Leaning with high power settings can cause detonation. Always verify power level with engine charts before
leaning. As the engine is leaned past maximum horsepower (100F to 150F rich of peak EGT) the engine will
lose power.
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