J.P. Instruments EDM 740 User Manual

Pilot’s Guide

Engine Data Management

EDM-730
EDM-830

EDM-740

EXPERIMENTAL

Copyright  2000-2010 J.P. Instruments, Inc.

All Rights Reserved

J.P. INSTRUMENTS INC.

Information: P. O. Box 7033
Huntington Beach, CA 92646

Factory: 3185 B Airway
Costa Mesa, CA 92626

PH: [phone]
PH: [phone]
FX: [phone]

www.jpinstruments.com
www.jpitech.com
[e-mail]

Printed in the United States of America Rev C June 1 2010

Last printed 3/11/2011 8:44:00 AM

For Your Safe Flight Page 1

Table of Contents

Section 1 - Introduction 5

Product Features 5
Engine Data Management 6
Benefits of Proper Mixture Control 6
JPI Probes 6
Temperature and Mixture 6
Displays and Controls 8
Typical EDM-830-6C Cylinder Display 8
Typical display configurations by model and mounting orientation 12
EDM-830 RPM and MAP Display 13
EDM-730/830 Linear Gauges 13
EDM-730/830 Basic Scanner® Operation 14
Operating Modes 15
Button Location and Display Rotation 16
Scanner® Information Area 19

Section 2 - Operating Procedures 20

Built-in Diagnostics: Startup and During Flight 20
EDM Modes 20
Automatic Mode 20
Manual Mode 21
LeanFind Mode 22
LeanFind Procedure—General Explanation 25
Expanded Leaning Procedures 28
Operation for each Phase of Flight 29
Shock Cooling 30
Common Misapplications 31

Section 3 - Diagnosing Engine Problems 32

Engine Diagnosis Chart 33
Alarms 35
Alarm Priority 36
Pre-Ignition and Detonation 36

Section 4 - Fuel Flow Option Operation 37

Fuel Management 37
Start Up Fuel 38
Resetting ‘USED’ 42
Accumulate — Trip Totalizer 42
Fuel Flow Display Select Switch 42
Parameter Scan—Systems with Fuel Flow Option 42

Section 5 - Long Term Data Memory 44

Downloading from Long Term Memory 44
Transferring from the USB Flash Drive to a PC 45

Page 2 Engine Data Management

Section 6 - Personalizing 45

Pilot Programming 45
Section 7 - Programming Horsepower Constant 47
Section 8 - Programming Manifold Pressure (MAP) 47
Section 9 - Programming use of Factory Original TIT Probe 48
Section 10 - Programming the Fuel Flow Option 49
Section 11 - Programming Long Term Data Memory 51
Section 12 - Factory Limits and GPS 52

MAP, Fuel Flow Alarm Limits, Units, Fuel Capacity 55

Navigation GPS Data Formats 57

GPS-C Fuel Flow Format for GPS Bi-directional Comm 57

Navigation Data Ports for GPS Communication 58
Section 13 - Options Connector Pin Assignments 59
Section 14 - Display Customization 60
Section 15 - Reference Reading 61
Section 16 - Technical Support 61
Section 17 - Limited Warranty 62
Section 18 - EDM-851 TWIN ENGINE ADDENDUM 63
Section 19 - Index 64
QUICK REFERENCE GUIDE 68

For Your Safe Flight Page 3

The following is a quick reference of basic operation

AUTO MODE:

parameters

automatically

indexed

Toggle between

LEAN R and

LEAN L of peak

tap STEP button

tap LF, then tap STEP

L

F

S

T

E

P

LEAN FIND:

starts LeanFind

procedure

h

t

F

o

L

b

y

d

d

sl

l

n

u

o

a

o

h

e

P

n

E

a

T

t

l

S

u

m

i

s

MANUAL MODE:

Parameters

manually indexed

by tapping STEP

F

L

b

e

g

l

e

i

n

a

n

i

n

g

Cylinder I.D.

box flashes

tap STEP and LF

simultaneously

release buttons

continue

leaning

Toggles to

include/exclude

parameter in

AUTO MODE

indexing

see
‘LeanFind
Mode’ for

details

hold LF

release LF

Displays

peak EGT

value

Page 4 Engine Data Management

Section 1 - Introduction

Product Features

 indicates standard feature
Hands-free, automatic scanning
All programming done from the Front Panel
LeanFind finds the first and last cylinder to peak with
true peak detect—eliminates a false peaks
Displays both leaned temperature below peak and peak
Battery voltage with alarm
24 Programmable alarm limits
Normalize view
DIF low to high EGT with alarm
EGTs to stable 1°F resolution
Shock cooling monitored on every cylinder
User selectable index rate
Fast response probes
Non-volatile long termmemory

Records and stores data up to 30 hours
Post-flight data retrieval

Data retrieval software
Alarm and warning light outputs
Oil temperature opt opt
Oil pressure opt opt
Turbine inlet temperature opt opt
Outside air temperature opt
Compressor discharge temperature opt opt
Intercooler temperature opt opt
Carburetor temperature opt opt
Manifold Pressure (MAP)
Fuel Flow FF opt

Solid-state rotor fuel flow transducer FF opt

Fuel quantity in gallons, kilograms, liters, or pounds FF opt

Low fuel quantity alarm FF opt

Low fuel time alarm FF opt

GPS interface FF opt

Instantaneous fuel flow rate FF opt

Total amount of fuel consumed FF opt

Total fuel remaining FF opt

Time to empty at the current fuel flow rate FF opt
Displays % horsepower and RPM RPM opt
Automatically calculates percent horsepower
Requires FF, OAT, RPM, and MAP.

730 830

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For Your Safe Flight Page 5

Engine Data Management

The EDM Engine Data Management system is the most advanced and
accurate piston engine-monitoring instrument on the market. Using the
latest microprocessor technology, the EDM will monitor up to twenty­four critical parameters in your engine, four times a second, with a

linearized thermocouple accuracy of better than 0.1 percent or 2 F°.

As your built-in flight engineer, the EDM is constantly “red line”
checking: all critical parameters are automatically checked four times a
second, regardless of the current display status. Leaning is accomplished
quickly and automatically using the LeanFind procedure. With the
EDM, it is now possible to have substantially more diagnostic
information available to you in a timely and usable manner.

Benefits of Proper Mixture Control

 Improved engine efficiency  Reduced maintenance costs
 Greater fuel economy  Reduced operating costs
 Smoother engine operation  Proper engine temperatures
 Longer spark plug life  Reduced engine vibration

JPI Probes

Temperature information
processed by the EDM is captured

by fast response grounded

JPI

temperature probes that accurately

cylinder

head

CHT probe

exhaust
manifold

measure small temperature
changes—as small as 1°F—that

EGT probe

routinely occur during mixture
adjustment.

Temperature and Mixture

In a piston engine only a small portion of the energy from combustion
produces movement of the piston during the power stroke. The majority
of energy passes into the exhaust pipe as hot gasses. By monitoring the
temperature of these exhaust gasses you will have an indication of the
quality of the combustion process. Low compression, non-uniform fuel
distribution, faulty ignition, and clogged injectors diminish the
efficiency of the combustion process that generates power. From the
cockpit you can adjust the fuel/air ratio by a process called leaning.
Retarding the mixture control changes the fuel/air ratio and hence affects
the Exhaust Gas Temperature (EGT).

Page 6 Engine Data Management

The following depicts the power, mixture and temperature relationships.

Best

power

range

0

-

50

-

100

T

G

E

First cylinder to

peak. Use for ROP

Rich of Peak

leaning

EGT °F below peak

T

H

C

10

0

9
5
9
0
8

power

5
8

Percent of best

0

t

n

e

c

r

e

P

r

e

w

o

p

S

p

e

c

o

n

s

u

c

i

f

i

m

p

economy

c

f

u

e

l

t

i

o

n

Best

range

GAMI

spread

Peak Power

Last cylinder to
peak. Use for LOP

Lean of Peak

leaning

20

0

-

20

-

40

-

60

-

80

best

CHT °F change from

power

Full Rich

(Take-off)

Rich

Lean

Too

lean

As the mixture is leaned, EGT rises to a peak temperature, and then
drops as the mixture is further leaned. Peak power occurs at a mixture
using more fuel than at peak EGT. Best economy occurs at peak EGT.
Accurate leaning yields optimal engine temperatures. By being able to
precisely adjust the mixture, your engine can produce either the best fuel
economy or maximum power, whichever you choose.

A single EGT gauge merely gives you an average of a few cylinder’s
temperature: some cylinders can be too rich, while others too lean.
Variations produced by differences in fuel distribution, ignition, and
compression will cause each cylinder to peak at a different temperature.
In some cases the coldest cylinder will peak first. TIT will run up to 100
degrees hotter than the hottest EGT.

For Your Safe Flight Page 7

Displays and Controls

The EDM monitors engine temperatures and voltages, assists in
adjusting the fuel/air mixture, and helps diagnose engine malfunctions.
There are three components of the user interface:

 Analog display including cylinder number and cylinder I.D. box
 Digital display for numeric readouts and messages
 Two front panel operating buttons for simple operation.

Typical EDM-830-6C Cylinder Display

1

5

Cyl Bargraphs:

EGT left side,

CHT right side,

digital above

4

CHT

absolute

scale

2

Temp in
°F or °C

3

Cyl Number identifies

bargraphcylinder.

Cyl I.D. Box identifies

the related Scanner

digital values

6

%HPEGT normalize

7

Information

Scanner

Area

8

Bargraph

TIT

9

Linear gauges

numerous

parameters

monitor

Display Dimming

The display features automatic dimming. Allow ten seconds for the
display to adjust to ambient lighting conditions. The dimming baseline
can be user adjusted in Pilot Programming Mode.

Page 8 Engine Data Management

The following is a description of various display areas. Numbers in
circles refer to features in the above diagram.

1

Normalize View and Percentage View

 Percentage View: when the EGT normalize indicator ‘NRM’ is

not lit, the columns indicate percent of EGT red line. Each

column is composed of a stack of segments. A maximum height
column (all segments lit) depicts 100 %, or more, of red line and
a one segment-high column depicts 50 % of red line. For
example, if the red line is 1650°F, a maximum height column
represents 1650°F and a one segment-high column represents
half that value, or 825°F. The Percentage View permits
comparison of EGTs across all cylinders. Hotter cylinders
display higher columns than cooler cylinders.

 Normalize View: when the EGT normalize indicator ‘NRM’ is

lit, the EGT columns are displayed normalized. When you

activate Normalize View, all column peaks are set to the same
half-height level for trend analysis. Any changes are shown as an
increase or decrease in column height. A one-segment change
in column height represents a 10°F change. The Normalize
view permits rapid visualization of EGT trends, rather than a
percentage of red line. You should use normalize in level cruise
and run-up.

To toggle between Percentage View and Normalize View, hold the
LF button until the ‘NRM’ indicator either comes on or goes off.

Selecting the Normalize view does not affect the digital display nor alter
the parameter sequence. The CHT display—described later—is not
affected by either Normalize or Percentage view.

You may select the Normalize view in either the Manual or Automatic
modes, but not during Lean Find mode. Normalize view is most helpful
for engine trend monitoring of each cylinder’s operation. For example
using the Normalize view during engine run-up, a fouled spark plug will
appear as a higher column.

TIP: A common misapplication is to be in the Normalize view and then
change your power setting. This can cause all columns to go off scale,
high or low, giving you the impression there is a problem. Turn off
‘NRM’ (return to Percentage view) before adding or reducing power and
when beginning your descent.

For Your Safe Flight Page 9

2

Temperature Units (°F or °C)

The EDM series engine temps can be set for either degrees Fahrenheit
°F or degrees Celsius °C. Note: OAT units can be set independently of
the engine temps. To change the display of engine temperatures see

“Changing the Alarm Limits” on page 52.

3

Cylinder Numbers and the Cylinder I.D. box

The row of numbers 1 through 6 (cylinder I.D numbers) and the letter
‘T’ (optional turbine inlet temp) are the column labels for the analog
display bargraphs. A square box (cylinder I.D. box), surrounding one or
more of the labels, specifies that those particular cylinders relate to the
values currently shown in the Scanner® information area.

4

CHT absolute scale

The ‘CHT absolute scale’ allows you to quickly determine the absolute
temperature of any CHT by comparing the bargraph height to the scale.
This is a quick and useful way to visually determine your CHT
temperatures relative to redline.

5

Bar Graph EGT and CHT

A cylinder ‘bargraph set’ is composed of a dotted line leading from the
cylinder I.D. number vertically to its EGT/CHT digital values. The EGT
column is located to the left of the line and the CHT column to the right.
Columns are composed of a stack of segments. The maximum height for
a column is the top of the dotted line. The CHT redline value is depicted
by a horizontal red line approximately half way up and to the right of the
dotted line. When any CHT column reaches redline, its column will turn
red and an alarm message will commence. The CHT display is not
affected by mode or view. The EGT column has three different viewing
modes: Percent View, Normalize View and Lean Find.

6

Percent HP (EDM-830 only)

Displays %HP (if FF, RPM, OAT, MAP functional).

7

Scanner® Information Area

The Scanner® Information Area provides expanded information for the
various monitored parameters. The Scanner® operates automatically or
manually.

Page 10 Engine Data Management

8

TIT Bargraph

The EDM provides a bargraph display of the hottest TIT and
continuously checks for exceedance of the redline temp. Once redline is
reached, the bargraph will change to red and an alert will flash in the
Scanner® Information Area.

9

Linear Gauges

The Linear gauges provide both digital and analog indications for
various parameters. The sliding pointer and color range marks give you a
quick indication of where you are relative to the operating limits while
the digital value provides precise information. See Section 14 - Display
Customization for ways you can customize this area. Note: parameters
monitored vary by model and options present.

EGT and CHT operation in Scanner® Information Area

When the Cylinder I.D. Box highlights a cylinder number (1 through 6),
the Scanner® Information Area will show the EGT value on the left
(four digits) and the CHT value on the right (three digits). Other
parameters are displayed in the digital display as described in the
subsection “Scanner® Information Area” on page 19.

Cylinder # 1

highlighted

4 digit

display of

EGT 1

For Your Safe Flight Page 11

3 digit

display of

CHT 1

Typical display configurations by model and mounting orientation

The EDM-730/830 series features the ability to be mounted either in
landscape or portrait orientation. Display layouts will differ as a result of
configuration differences. You may examples of the EDM-830 and
EDM-730 are shown below:

EDM-830 6 Cylinder

(landscape orientation)

EDM-830 6 Cylinder

(portrait orientation)

EDM-730 6 Cylinder

(portrait orientation)

Page 12 Engine Data Management

EDM-830 RPM and MAP Display

The EDM-830 depicts both RPM and Manifold Pressure graphically and
digitally. Examples are shown for both landscape and portrait
orientation. When a power setting exceeds redline, the digital value
changes to red and a blinking message appears in the Scanner®
Information Area. Percent horsepower is located in this display area
also.

EDM-830 RPM & MAP

(landscape orientation)

EDM-830 RPM & MAP

(portrait orientation)

EDM-730/830 Linear Gauges

This area contains linear bar
graphs with digital displays. When
a value exceeds red line, it is
displayed in RED. You can
customize what appears in each
position. Examples of available
displays are:

 Voltage (BAT)
 EGT Span (DIF)
 Shock Cooling (CLD)
 Oil temperature (O-T)
 Oil pressure (O-P)
 Outside Air Temperature (OAT)
 Fuel flow, units per hour (GPH)
 Fuel Used (USD)
 Fuel Remaining (REM)
 Fuel Required to waypoint or

destination (REQ)

EDM-830

Linear Gauge

For Your Safe Flight Page 13

EDM-730/830 Basic Scanner® Operation

The EDM-730/830 Scanner section contains graphic representation of
EGT, CHT and TIT values as well as containing a general purpose text
message area. It will go into Automatic scan mode a few minutes after
power up. You don’t have to touch any buttons.

CHT

redline

CHT

absolute

scale

Engine temps

in F or C

Cylinder numbers

1 through 6. T is

TIT

Digital EGT/CHT/TIT

values

Cylinder I.D. box indicates

which cylinder temperatures

are show in the digital display

TIT redline

Scanner Information Area

EGT: Exhaust Gas Temperatures

Blue segments represent temperature magnitude and are located to the

left of the vertical dotted line present in each cylinder bar graph.
Cylinder I.D. numbers are located just below the dotted line (one for
each cylinder on the engine). A white square around a cylinder I.D.
number identifies which cylinder the Scanner® digital value relates to
(cylinder 3 in the above example). The digital value is always present
above the dotted line and is Blue.

CHT: Cylinder Head Temperatures

White segments represent temperature magnitude and are located to the

right of the vertical dotted line present in each cylinder bar graph.
Cylinder I.D. numbers are located just below the dotted line (one for
each cylinder on the engine). A white square around a cylinder I.D.
number identifies which cylinder the Scanner® digital value relates to
(cylinder 3 in the above example). The digital value is always present
above the dotted line and is White. CHT redline is depicted by red
horizontal lines half way up the bar graph scale.

Page 14 Engine Data Management

TIT: Turbine Inlet Temperature

Light Blue segments represent temperature magnitude (at the same scale

as EGT) and are located to the right of the last cylinder bar graph set. A
‘T’ just below the dotted line identifies this as TIT. When a white square
surrounds the ‘T’, this signifies that the scanner digital values relate to
TIT. The digital value is always present above the dotted line and is
Light Blue. TIT redline is depicted by a red horizontal line above the
majority of the TIT bar graph area.

There are two views: Normalize view levels the EGT columns and
increases the sensitivity of the Scanner® bar graph columns. To enter
the Normalize view, hold the LeanFind button for three seconds. The
NRM icon will be displayed above the Scanner® section and the bars
will be blue. Hold the LeanFind button for three seconds to return to the
Standard view. See page 9 for a more detailed description.

Operating Modes

There are three standard operating modes of the EDM: Automatic,
Manual, and LeanFind. These modes will be described in more detail

beginning on page 20. When you first turn on the power the EDM starts
in the Manual mode, but will enter the Automatic mode after two
minutes (most of the time you will operate the EDM in the Automatic
mode). The three modes primarily affect the Scanner® Information
Area.

Automatic Mode

Just tap the LF button, then tap the STEP button. No user

intervention is required to use this mode. Each cylinder and each
parameter value is automatically sequenced and shown in the digital
display for a few seconds.

Manual Mode

Just tap the STEP button. This stops Automatic Mode. Each indexed

parameter is frozen in the digital display until you manually index to the
next parameter by tapping the STEP button.

LeanFind Mode

Simply pre-lean, tap the LF button and begin leaning. The EDM will

assist you in finding the correct cylinder to peak to set your mixture to.

For Your Safe Flight Page 15

Button Location and Display Rotation

The EDM can be mounted in four different positions. After mounting,
you may need to remove and relocate the white button to the ‘STEP’
location. You may also need to rotate the EDM display. Clear any alarms
and hold STEP (about 6 seconds) until you see the overlayed arrow.
This arrow indicates where the top of the display will be. Tap LF until
the arrow points to 12 o’clock. Now tap STEP. Your display should
now be upright. The button functions are depicted in the four possible
orientations as shown below:

Page 16 Engine Data Management

The STEP and LF buttons control all functions of the EDM. The term
tap denotes pressing a button momentarily. The term hold denotes
pressing and holding a button for five seconds or longer.

STEP Button - Primary functions

 In the Automatic mode, tapping the STEP button will change to

the Manual mode. Subsequent taps of the STEP button will
display the next parameters in the sequence.

 In the LeanFind mode tapping the STEP button will terminate

the LeanFind mode and change to the Automatic mode.

STEP Button - Secondary functions

 In the Manual mode, holding the STEP button will display the

previous parameters in the sequence (rapidly backwards).

 In the Pilot Program Mode, tapping the STEP button will

generally advance to the next item in the list.

 When an alarm is displayed, tapping the STEP button will

prevent that alarm from appearing for the next ten minutes.

 When an alarm is displayed, holding the STEP button until the

word OFF appears, prevents that alarm from appearing for the
remainder of the flight.

LF Button - Primary functions

 In Automatic or Manual modes, tapping the LF button will

change to the LeanFind mode.

 In the LeanFind mode, holding the LF button after peak EGT is

found will display peak EGT.

 In Automatic or Manual modes, holding the LF button for three

seconds will toggle between Percentage and Normalize views.

EGT Percentage view

is ON.

(NRM icon off)

hold LF button

for 3 seconds

EGT Normalize View

is ON.

(NRM icon on)

For Your Safe Flight Page 17

LF Button - Secondary functions

 In the pilot programming procedure, holding or tapping the LF

button is used to increment or decrement parameter values and
toggle between Yes and No answers to questions.

STEP and LF buttons together

 Holding both the STEP and LF buttons simultaneously, for

several seconds, changes to the Pilot Programming Mode.

 Holding both the STEP and LF buttons simultaneously for

several seconds when in a unit programming mode and ‘END? Y’
is displayed will take you to the next programming mode (if one
exists).

 Holding both the STEP and LF buttons simultaneously for

several seconds after entering LeanFind mode but before
beginning to lean will toggle between leaning ‘Rich Of Peak’ and
‘Lean Of Peak’.

 Tapping both the STEP and LF buttons simultaneously in

Manual mode toggles to include or exclude the displayed
parameter from the Automatic mode. It has no affect on the
displayed parameters in the Manual mode.

Page 18 Engine Data Management

Scanner® Information Area

The Scanner® Information Area provides expanded information in the
form of alpha-numeric messages, parameters and calculations. In Auto­Scan, parameters will ‘scan by’ once every 4 seconds (default). This rate
can be changed in Pilot Programming Mode. Tap the STEP button for
‘Manual’ selection of any parameter. Parameters for the installed options
will be displayed - uninstalled parameters will not appear.

DISPLAY PARAMETER DESCRIPTION

EGT 1436 CHT 382

1580 TIT
1490 TI2

204 OIL-T

64 OIL-P

75 CLD

13.9 BAT
23 OAT

40 DIF

56 CRB

145 CDT

105 IAT

-40 C-I

RPM 2460 MAP 23.6

Calculated

68.0 REM

12.7 REQ

Calculated

55.2 RES

9.8 MPG

Calculated

04:32 H:M

15.0 GPH

7.2 USD

EGT/CHT

TIT 1
TIT 2

OIL TEMP

OIL PRES

SHOCK COOL

BATTERY

OAT

DIF

CRB

CDT

IAT

CDT-IAT

POWER

REM

FUEL

REQUIRED

FUEL

RESERVE

MILES PER

GALLON

ENDURANCE

FUEL FLOW

RATE

FUEL USED

Shows successive pairs of
EGT & CHT per STEPtap.

Turbine Inlet Temp #1
Turbine Inlet Temp #2
Oil temperature
Oil pressure
CHT cooling rate (deg/min)
Battery/Bus voltage
Outside air temperature
Hottest minus coldest EGT

Carburetor Air Temp (only
allowed if IATnot present)
Compressor Discharge Temp
(only allowed if CRB not
present)

Intercooler Air Temp
Intercooler cooling
RPM &MAP values

Calculated fuelremaining

Calculated fuelrequired to
reach waypoint (GPS interface
must be correct)
Calculated fuelreserve at
waypoint (GPS interface must
be correct)
Calculated fuelmiles per units
(GPS interface must be
correct)

Calculated time remaining to
fuel exhaustion

Calculated fuelflow rate in
units per hour

Calculated fuelused

For Your Safe Flight Page 19

Section 2 - Operating Procedures

Built-in Diagnostics: Startup and During Flight

When your EDM is first turned on, the screen begins by showing the
unit model number and TSO category. Next, several display patterns are
presented allowing you to check for proper screen operation. During this
time, the EDM is conducting built-in-tests of certain components,
calibration and probes. Any newly installed options are found and
logged in at this time. If a probe problem is found, diagnostic indications
will be presented on the display. These vary depending on the parameter.
For CHT, EGT and TIT, a message appears in the Scanner® Information
Area. For example, if EGT#2 were open circuit, the message would read
‘OPEN EGT 2’. For an inoperative horizontal linear gauge function, a
red ‘X’ is drawn through it and its digital value is dashed out. Probes
determined to be faulty during the power up checks are disabled from
the Scanner® automatic sequence. During flight, probes are periodically
checked for inconsistent or intermittent signals and are disabled if
deemed unusable in which case an appropriate message will appear.

EDM Modes

The EDM has three different operating modes: Automatic, Manual and
LeanFind. When you first turn on the power the EDM starts in the

Manual mode, but will enter the Automatic mode after a few minutes.
The Automatic mode provides you with engine monitoring information
for the majority of flight conditions. To adjust the mixture, use the
LeanFind mode. To display specific parameters, use the Manual mode.
In either Automatic or Manual modes, the cylinder bar graphs show a
graphic representation of EGT and CHT for each cylinder and TIT (if
present).

Automatic Mode
Just tap the LF button, then tap the STEP button. No other user

intervention is required to use this mode. The EDM will begin
displaying the parameter sequence at the programmed ‘RATE’ (see
“Personalizing” on page 45).

Page 20 Engine Data Management

Individual parameters can be excluded from the Automatic mode: tap
STEP to enter the Manual mode. Tap STEP to select the parameter you
want to exclude. Now tap both STEP and LF buttons simultaneously.
Note that tapping the STEP and LF buttons again, toggles back to
include status.

An excluded parameter displays a decimal point before the parameter
name.

‘Excluded’ marker

For example:

Included: 14.6 BAT Excluded: 14.6 .BAT

 Every time you turn on the EDM, all parameters are set to

‘included’.

 All installed parameters are always displayed in the Manual mode.

Exclusion only applies to the Automatic mode.

 All parameters are checked periodically for alarm conditions

regardless of their included or excluded status.

 OIL temperature, EGT, CHT and TIT values cannot be excluded.

Manual Mode
Just tap the STEP button. Use the Manual mode when you want to

monitor one specific parameter such as shock cooling during descent, or
a particular cylinder temperature during climbs. To change to the
Manual mode, tap the STEP button once. Subsequent taps will index the
digital display through the parameter sequence (see “Scanner®
Information Area” on page 19). To exit the Manual mode and return to
the Automatic mode, tap the LF button and then tap the STEP button.
You may disable the Automatic mode by setting scan rate to ‘0’.

For Your Safe Flight Page 21

LeanFind Mode
The EDM supports two methods of leaning; Rich Of Peak (ROP) and

Lean Of Peak (LOP). Note: you can set the power-up default to LOP or

ROP in the Pilot Program Mode but easily change modes during flight.
During traditional Rich Of Peak leaning, you’ll finalize the mixture to
about 20 to 80° rich of peak (depending on engine operating
requirements). However, with the advent of closely balanced injectors
(such as GAMI), it is possible to set the mixture lean of peak—thus
saving fuel and running the engine cooler. Teledyne Continental
recommends lean of peak for the Malibu. Both Rich Of Peak and Lean
Of Peak processes are described in detail in this manual.

Upon reaching cruise configuration, use the LeanFind mode to identify
the correct cylinder to reach peak EGT (for rich of peak this is the
FIRST to peak, for lean of peak this is the LAST to peak). To change
from one method to the other, just after activating LeanFind, hold STEP
and LF and the other method will be momentarily shown: ROP or LOP.
Release buttons after other method appears.

The following charts provide step by step guidelines in leaning your
engine, for both rich of peak and lean of peak modes:

Page 22 Engine Data Management