J.P. Instruments EDM 960 Twin Pilots Guide - Manual (Page 29)

For Your Safe Flight Page 24
Lean Find - Rich Of Peak
Lean Find - Finalizing the
Detection: Eventually, one cylinder will
reach peak before any of the other cylinders. The EDM will determine
this automatically. The EDM will indicate success in finding a peak by
displaying the word LEANEST for two seconds and flashing the peaked
EGT column. The Scanner® Information Area will also display the
current value for the peaked EGT and fuel flow value, for final
adjustment of the mixture. The peak EGT and FF value when peak
occurred is remembered by the EDM and can be displayed by holding
the
PEAK button.
Rich Of Peak
Column and I.D.
box of the leanest
EGT flashes.
Current values
for leanest EGT
and fuel flow.
Peak Detected - Rich of Peak mode
Mixture: You may now
enrichen the mixture to operate at peak or continue enriching to a value
of your choice (typically between 50 to 100° rich of peak for best
power), consistent with the procedures defined in your aircraft and/or
engine manual. You can tap PEAK
to see the current difference (delta)
from the peak temperature. This is handy for finalizing mixture. Note: If
you lean too much, the EGT will drop off on the lean side of peak.
Enrichen if this occurs and set final mixture rich of peak. Tapping
EXIT
exits the lean find mode and automatic scanning resumes.