JPInstruments EDM 700 User Manual
MilViz Cessna 310R EDM 700 Systems Manual
EDM 700
Digital Engine Temperature Gauge
for Military Visualizations (MilViz) Cessna 310R
The EDM 700 is an advanced gauge that will display a bar graph of Exhaust Gas Temperature for
each of the six cylinders, the “T” average Exhaust Gas Temperature and a bar graph of the Oil
Pressure. At the bottom of the gauge, there is a digital readout of EGT (left display) and CHT
(right display).
The left button (Step) will display the EGT temperature for each cylinder in the left display, as well
as the “T” average EGT.
The right button (LeanFind) is used to engage automatic search for the Peak EGT.
The CHT for each of the six cylinders is displayed as a “Red Bar,” as can be seen in the picture
above.
The major function of the EDM700 gauge is to allow the pilot to lean or enrich the mixture* so that
fuel/burn ratio is maximized, while at the same time allowing the cooling effect of rich mixture
settings.
Version 1.0 – 23 May 2010
[1]
MilViz Cessna 310R EDM 700 Systems Manual
USAGE:
1) When starting the engine, open Mixture Full Rich.
2) After rotation, during climb out, slowly reduce Mixture until Fuel Flow is approximately 18
GPH.
3) You may need to lean a bit more, if you are climbing > 8,000' or are operating from high altitude
airport.
4) After leveling out at cruise altitude, slowly pull the throttle back to Cruise MAP.
5) Press the “LeanFind” button to start the automatic process.
6) Slowly lean Mixture, while watching the EDM 700's EGT display. Note where the 'peak EGT' is
reached, the display will “lock” on the “Peak EGT” for the hottest cylinder, and will display a bar
above the cylinder number.**
7) Click on the “LeanFind” button to turn it off. The display will automatically lock to the “T”
column, which displays the “average EGT” for all cylinders in the left digital display.
8) Slowly enrich the Mixture to ~20º RICH of the 'peak EGT' point.
For example, if 'peak EGT is 1640º, set the Mixture until EGT reads ~`1620º.
9) Fuel Flow should be between 12 and 13 GPH between 6500' and 8500' for a typical Lycoming
engine. Running 20º ROP (Rich of Peak) will give the best “Economy.”
10) For best "Performance," set the Mixture to ~60 degrees RICH of peak. Fuel Flow will be ~15
to 18 GPH for a typical Lycoming engine.
*Note: Make sure that you have "Automixture" turned off in FSX, otherwise this will not work properly!
**Note: because of FS limitations, cylinder #5 will always have the ‘hottest EGT.’
Version 1.0 – 23 May 2010
[2]
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