J.P. Instruments EDM 700/800/711 Pilots Guide - Manual (Page 49)

For Your Safe Flight Page 45
If you do not have auxiliary tanks or tank tabs, answer “No.” If you
answer “Yes,” you will be asked to input the capacity of the auxiliary
tanks in the fuel flow units selected. If you have tank tabs and sometimes
fill only to the tabs, set the auxiliary tank capacity to the difference
between full tank capacity and tab capacity. The EDM does not
differentiate fuel flow between the main and auxiliary tanks; it tracks
only total fuel in the aircraft.
Low Time Alarm Limit
Select the value of the time remaining, in minutes, that triggers the
alarm. Time remaining is calculated at the current fuel flow rate.
Low Fuel Alarm Limit
Select the value of the fuel remaining, in the selected fuel flow units,
that triggers the alarm. Fuel remaining is calculated at the current fuel
flow rate.
Carburetor?
Different response filters are used depending on whether your engine is
carbureted or fuel injected. The filter for a carbureted engine has a
slower response time to reduce sudden fluctuations in readings. The
higher the number the more filtering or less jumping around.
Number of Cylinders
This applies only to EDM-800. Set CYL = 4 or 6 depending on your
engine. Exceptions:
 4 cylinder engine with dual (all-in-one) magnetos set to CYL= 8.
 4 cylinder Lasar® ignition set to CYL=8.
 6 cylinder Lasar® ignition set to CYL=I2.
HP and EC (EDM-800 only)
These adjustments set the parameters for the HP calculations in the
EDM. Set the Rated HP for your particular aircraft. Set the HP
Constant to 14.9 for normally aspirated or turbo normalized engines; set
it to 13.75 for turbo boost engines. To set the EC, hold STEP and LF for
five seconds. The first digit will flash. Use LF to change the digit, use
STEP to advance to the next digit. Hold STEP and LF for five seconds
to exit.