J.P. Instruments EDM 930 Primary Pilots Guide - Manual (Page 31)

For Your Safe Flight Page 26
Lean Find-Rich Of Peak 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 its
corresponding Cylinder I.D. Box. The Scanner® Information Area will
also display the current value for the peaked EGT on the left, and the
fuel flow value on the right, for final adjustment of the mixture. The
peak EGT value and FF value encountered during leaning is remembered
by the EDM and can be displayed by holding the PEAK button during
Lean Find Mode.
Lean Find-Finalizing the Rich Of Peak 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. Note: tap PEAK to see the current difference from the
peak temperature. This is handy for finalizing mixture. Tapping EXIT
exits the lean find mode and automatic scanning resumes.
Peak Detected - Rich Of Peak Mode