For Your Safe Flight Page 35
For fuel calculations to be accurate, it is imperative that you inform
the EDM of the correct amount of fuel aboard the aircraft. Do not
rely on fuel flow instruments to determine fuel levels in tanks. Refer
to original fuel flow instrumentation for primary information
Section 7 - Long Term Data Memory
The EDM Long Term Data Memory will record and store all displayed
parameters once every six seconds (or at the programmed interval of
between 2 to 500 seconds). At a later time it will transfer them to a PC
using a Palm™ Computer as a intermediate courier, or directly to a
laptop PC. You can select to record, or to output in real-time, but not
both at the same time. (To turn on or turn off the recording feature, see
“Changing the Alarm Limits” on page 45.)
If you select to output in real-time, refer to the description in the section,
“Real-Time Serial Data Port” on page 48.
When you retrieve recorded data to your Palm Computer or laptop PC
you can choose to retrieve all the data in stored in the EDM, or only the
new data recorded since your last retrieval. In either case, no data in the
EDM is erased. The data will be saved in the Palm Computer or PC in a
file in a compressed format. The PC program supplied with the Long
Term Data Memory will decompress the data for display and use by
other programs, such a MS Excel or Lotus 123.
The amount of total data that the EDM can store will vary depending on
how rapidly the measured temperatures change. The typical storage is up
to 20 hours at a 6 second interval (1200 hours at 6 minute interval), but
may vary depending on which options are installed. When the memory
becomes full, the oldest data will be discarded to make room for the
newest. You may place a mark at the next data record by tapping the LF
button twice. You will see the word SNAP within the next six seconds,
indicating a data record has been marked. Tap the STEP button to return
to the Automatic mode. Recording begins when EGTs are greater than
500°F or “snap” is requested.
All data are time-stamped. The EDM Long Term Data Memory contains
a real-time clock that may be reset to local time when you initially
program your instrument. You may also program an aircraft id that will
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