Electronics UBG-16 User Manual

Ultimate Bar Graph Engine AnalyzerUltimate Bar Graph Engine Analyzer

Ultimate Bar Graph Engine Analyzer

Ultimate Bar Graph Engine AnalyzerUltimate Bar Graph Engine Analyzer

(UBG-16)(UBG-16)

(UBG-16)

(UBG-16)(UBG-16)

Operating InstructionsOperating Instructions

Operating Instructions

Operating InstructionsOperating Instructions

OI 0505991

5/5/99

Rev. B: 3/10/00

You must read this manual before installing or operating the instrument. This
manual contains warranty and other information that may affect your decision

to install this product and/or the safety of your aircraft.

Electronics International Inc. Electronics International Inc.

Electronics International Inc.

Electronics International Inc. Electronics International Inc.

63296 Powell Butte Hwy • Bend, OR 97701 • [phone] • Buy-EI.com63296 Powell Butte Hwy • Bend, OR 97701 • [phone] • Buy-EI.com

63296 Powell Butte Hwy • Bend, OR 97701 • [phone] • Buy-EI.com

63296 Powell Butte Hwy • Bend, OR 97701 • [phone] • Buy-EI.com63296 Powell Butte Hwy • Bend, OR 97701 • [phone] • Buy-EI.com

®®

®

®®

Important NoticeImportant Notice

Important Notice

Important NoticeImportant Notice

***** MUST READ ********** MUST READ *****

***** MUST READ *****

***** MUST READ ********** MUST READ *****

If you think it is not important to read this manual, you're wrong!If you think it is not important to read this manual, you're wrong!

If you think it is not important to read this manual, you're wrong!

If you think it is not important to read this manual, you're wrong!If you think it is not important to read this manual, you're wrong!
manual contains important operating information that may affect themanual contains important operating information that may affect the

manual contains important operating information that may affect the

manual contains important operating information that may affect themanual contains important operating information that may affect the
safety of you, your aircraft and passengers.safety of you, your aircraft and passengers.

safety of you, your aircraft and passengers.

safety of you, your aircraft and passengers.safety of you, your aircraft and passengers.

Read the Warranty / AgreementRead the Warranty / Agreement

Read the Warranty / Agreement. There is information in the Warranty / Agreement that may alter your

Read the Warranty / AgreementRead the Warranty / Agreement

If you do not accept the terms of the Warranty / Agreement, do not installIf you do not accept the terms of the Warranty / Agreement, do not install

decision to install this product.
this productthis product

this product. This product may be returned for a refund. Contact Electronics International inc. for details.

this productthis product

The pilot
Do not allow anyone to operate the aircraft that does not know how to properly interpret and operate
this product. Keep the Operating Manual in the aircraft at all times. If you do not thoroughly
understand the operation of this product, contact a knowledgeable flight instructor for training.

This Instrument only displays the parameters for the function(s) being monitored. The pilot is
responsible for interpreting the data and determining if an engine or aircraft system anomaly exits.
When using this instrument the pilot’s diagnostic ability is limited to his/her

displayed data and the there observation skills.

If after reading this manual you do not have the knowledge to interpret the displayed data to operate the
aircraft safely or to detect engine and/or aircraft system problems, contact a knowledgeable instructor for
training.

must must

must understand the operation and limitations of this product before flying the aircraft.

must must

If you do not accept the terms of the Warranty / Agreement, do not install

If you do not accept the terms of the Warranty / Agreement, do not installIf you do not accept the terms of the Warranty / Agreement, do not install

interpretation of the

This This

This

This This

The ability for this product to respond to an engine or aircraft system anomaly is directly related to
how that anomaly affects the reading of the function(s) being monitored (i.e.: if an engine fire does
not affect the engine RPM, the RPM reading will not change).

If you detect a problem using this instrument, it is your responsibility to take appropriate action to
insure the safety of the flight. Practice simulating problems to build your skills and to understand
the relationships between problems and their affects on the displayed data. To insure you are taking
appropriate action contact a knowledgeable flight instructor for training.

This manual does not make any recommendations as to specific exhaust gas temperature(s) at which
to lean your engine. Check the airframe and/or engine manufacturer’s recommendations to properly
lean your engine. It is the pilot’s responsibility to lean the engine properly.

It is possible for any instrument to fail thereby displaying inaccurate high, low or jumpy readings. There­fore, you
your aircraft safely in spite of an instrument failure. If you do not have this knowledge, contact the
FAA or a knowledgeable flight instructor for training prior to flying the aircraft with this instrument.

mustmust

must be able to recognize an instrument failure and you

mustmust

mustmust

must be proficient in operating

mustmust

Rev. C 9/24/97

Contents

Warranty --------------------------------------------------------------------------------------------------- 2

Introduction ----------------------------------------------------------------------------------------------- 3

Mode Selector Switch ----------------------------------------------------------------------------------- 3

Normal Operating Mode ------------------------------------------------------------------------------- 3

Step Switch ------------------------------------------------------------------------------------------------ 4

1. Displaying the EGTs and CHT’s: --------------------------------------------------------------- 4

2. Displaying a Temperature on the 7th Column of Bars: --------------------------------------- 4

3. Displaying Other Temperatures and/or Functions Digitally: --------------------------------- 5

4. Displaying the Shock Cooling Rate: ------------------------------------------------------------ 5

5. Displaying the Peak EGT and Cylinder: ------------------------------------------------------- 5

6. Displaying the EGT Difference: ---------------------------------------------------------------- 6

Scanning Through the Channels Automatically --------------------------------------------------- 6

Normalized Operating Mode -------------------------------------------------------------------------- 6

Lean Operating Mode ---------------------------------------------------------------------------------- 7

1. False Peaks: --------------------------------------------------------------------------------------- 8

2. Leaning on the Rich Side of Peak: -------------------------------------------------------------- 8

3. Alternate Method for Leaning on the Rich Side of Peak: ------------------------------------ 9

4. Leaning on the Lean Side of Peak: ------------------------------------------------------------- 9

5. Method for Checking the Mixture Setting when Operating on the Lean Side of Peak: --- 9

Alarms ------------------------------------------------------------------------------------------------------ 10

1. High and Low Alarm Annunciators: ------------------------------------------------------------ 10

2. EGT Differential Alarm Annunciator: ---------------------------------------------------------- 10

3. Shock Cooling Alarm Annunciator: ------------------------------------------------------------- 10

4. Finding the Channel on which a Programmed Limit has been Violated: -------------------- 10

5. Canceling all Active Alarms for 10 Minutes: -------------------------------------------------- 11

6. Activating all Canceled Alarms: ---------------------------------------------------------------- 11

Programming the 34 Limits ---------------------------------------------------------------------------- 11

Programming the High and Low EGT and CHT Limits ----------------------------------------- 1 1

1. Selecting the High EGT Limits: ----------------------------------------------------------------- 11

2. Selecting the Low EGT Limits: ------------------------------------------------------------------ 12

3. Selecting the High CHT Limits: ----------------------------------------------------------------- 12

4. Selecting the Low CHT Limits: ----------------------------------------------------------------- 12

Page 1 of 2

Contents Continued:Contents Continued:

Contents Continued:

Contents Continued:Contents Continued:

Programming the Range of the EGT Columns of Bars ------------------------------------------ 1 4

1. Selecting the Upper EGT Bar Trip Point: ------------------------------------------------------ 14

2. Selecting the Lower EGT Bar Trip Point: ------------------------------------------------------ 14

Programming the High and Low Limits and Range of the 7th Column of Bars ------------ 15

Programming the High and Low Limits for Other Temperatures or Functions ------------ 1 6

Programming the Shock Cooling Limit and Cylinder -------------------------------------------- 1 8

Programming the EGT Differential Limit ----------------------------------------------------------- 1 8

Power-up Programming --------------------------------------------------------------------------------- 19

1. Enter the Power-up Programming Mode: ----------------------------------------------------- 20

2. Configuring EGT and CHT Channels: --------------------------------------------------------- 20

3. Configuring the 7th Column of Bars: ----------------------------------------------------------- 20

4. Configuring the Remaining Left and Right Channels: ---------------------------------------- 21

5. Exiting the Programming Mode: ---------------------------------------------------------------- 21

Operating the UBG in Your Aircraft ------------------------------------------------------------------ 2 1

1. Taxi: ------------------------------------------------------------------------------------------------ 21

2. Run Up: -------------------------------------------------------------------------------------------- 21

3. Takeoff: -------------------------------------------------------------------------------------------- 22

4. Climb: ---------------------------------------------------------------------------------------------- 22

5. Cruise: ---------------------------------------------------------------------------------------------- 22

6. Descent: -------------------------------------------------------------------------------------------- 23

Work Sheet for Setting Limits ------------------------------------------------------------------------- 24

"UBG-16" Configuration Form ------------------------------------------------------------------------ 25

Fuel/Air Profile ------------------------------------------------------------------------------------------- 26

Specifications and Operating Features -------------------------------------------------------------- 28

Page 2 of 2

WW

arranty / Agreementarranty / Agreement

W

arranty / Agreement

WW

arranty / Agreementarranty / Agreement

Electronics International Inc. warrants this instrument and system components to be free from defects in
materials and workmanship for a period of one year from the user invoice date. Electronics International
Inc. will repair or replace any item under the terms of this Warranty provided the item is returned to the
factory prepaid.

1. This Warranty/Agreement shall not apply to any product that has been repaired or altered by any person
other than Electronics International Inc., or that has been subjected to misuse, accident, incorrect wiring,
negligence, improper or unprofessional assembly or improper installation by any person.
does not cover any reimbursement for any person’s time for installation, removal, assemblydoes not cover any reimbursement for any person’s time for installation, removal, assembly

does not cover any reimbursement for any person’s time for installation, removal, assembly

does not cover any reimbursement for any person’s time for installation, removal, assemblydoes not cover any reimbursement for any person’s time for installation, removal, assembly
or repair.or repair.

or repair. Electronics International retains the right to determine the reason or cause for warranty repair.

or repair.or repair.

2. This Warranty/Agreement does not extend to any machine, vehicle, boat, aircraft or any other device to
which the Electronics International Inc. product may be connected, attached, interconnected or used in
conjunction with in any way.

3. The obligation assumed by Electronics International Inc. under this warranty is limited to repair, re­placement or refund of the product, at the sole discretion of Electronics International Inc.

4. Electronics International Inc. is not liable for expenses incurred by the customer or installer due to
factory updates, modifications, improvements, upgrades, changes, or any other alterations to the product
that may affect the form, fit, function or operation of the product.

This warrantyThis warranty

This warranty

This warrantyThis warranty

5. Personal injury or property damage do to misinterpretation or lack of understanding of this product is
solely the pilots responsibility. The pilot
before flying the aircraft. If he/she does not, they agree to seek training from a knowledgeable instructor.
Do not allow anyone to operate the aircraft that does not know the operation of this product. Keep the
Operating Instructions in the aircraft at all times.

6. Electronics International Inc. is not responsible for shipping charges or damages incurred under this
Warranty.

7. No representative is authorized to assume any other liability for Electronics International Inc. in connec­tion with the sale of Electronics International Inc. products.

You must read the entire installation and operating instructions. If you do not agree toYou must read the entire installation and operating instructions. If you do not agree to

8.

You must read the entire installation and operating instructions. If you do not agree to

You must read the entire installation and operating instructions. If you do not agree toYou must read the entire installation and operating instructions. If you do not agree to

and accept the terms of this warranty/agreement and the responsibilities set forth in theseand accept the terms of this warranty/agreement and the responsibilities set forth in these

and accept the terms of this warranty/agreement and the responsibilities set forth in these

and accept the terms of this warranty/agreement and the responsibilities set forth in theseand accept the terms of this warranty/agreement and the responsibilities set forth in these
manuals, DO NOT install this product. Contact E.I. for a refund.manuals, DO NOT install this product. Contact E.I. for a refund.

manuals, DO NOT install this product. Contact E.I. for a refund.

manuals, DO NOT install this product. Contact E.I. for a refund.manuals, DO NOT install this product. Contact E.I. for a refund.
This Warranty is made only to the original user.

WARRANTIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EX-WARRANTIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EX-

WARRANTIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EX-

WARRANTIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EX-WARRANTIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EX­PRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FIT-PRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FIT-

PRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FIT-

PRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FIT-PRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FIT­NESS FOR A PARTICULAR PURPOSE. PURCHASER AGREES THAT IN NO EVENTNESS FOR A PARTICULAR PURPOSE. PURCHASER AGREES THAT IN NO EVENT

NESS FOR A PARTICULAR PURPOSE. PURCHASER AGREES THAT IN NO EVENT

NESS FOR A PARTICULAR PURPOSE. PURCHASER AGREES THAT IN NO EVENTNESS FOR A PARTICULAR PURPOSE. PURCHASER AGREES THAT IN NO EVENT
SHALL MANUFACTURER BE LIABLE FOR SPECIAL, INCIDENTAL OR CONSEQUEN-SHALL MANUFACTURER BE LIABLE FOR SPECIAL, INCIDENTAL OR CONSEQUEN-

SHALL MANUFACTURER BE LIABLE FOR SPECIAL, INCIDENTAL OR CONSEQUEN-

SHALL MANUFACTURER BE LIABLE FOR SPECIAL, INCIDENTAL OR CONSEQUEN-SHALL MANUFACTURER BE LIABLE FOR SPECIAL, INCIDENTAL OR CONSEQUEN­TIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE OR OTHER ECONOMICTIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE OR OTHER ECONOMIC

TIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE OR OTHER ECONOMIC

TIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE OR OTHER ECONOMICTIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE OR OTHER ECONOMIC
LOSS. EXCEPT AS EXPRESSLY PROVIDED HEREIN, MANUFACTURER DISCLAIMS ALLLOSS. EXCEPT AS EXPRESSLY PROVIDED HEREIN, MANUFACTURER DISCLAIMS ALL

LOSS. EXCEPT AS EXPRESSLY PROVIDED HEREIN, MANUFACTURER DISCLAIMS ALL

LOSS. EXCEPT AS EXPRESSLY PROVIDED HEREIN, MANUFACTURER DISCLAIMS ALLLOSS. EXCEPT AS EXPRESSLY PROVIDED HEREIN, MANUFACTURER DISCLAIMS ALL
OTHER LIABILITY TO PURCHASER OR ANY OTHER PERSON IN CONNECTION WITHOTHER LIABILITY TO PURCHASER OR ANY OTHER PERSON IN CONNECTION WITH

OTHER LIABILITY TO PURCHASER OR ANY OTHER PERSON IN CONNECTION WITH

OTHER LIABILITY TO PURCHASER OR ANY OTHER PERSON IN CONNECTION WITHOTHER LIABILITY TO PURCHASER OR ANY OTHER PERSON IN CONNECTION WITH
THE USE OR PERFORMANCE OF MANUFACTURER’S PRODUCTS, INCLUDING SPECIFI-THE USE OR PERFORMANCE OF MANUFACTURER’S PRODUCTS, INCLUDING SPECIFI-

THE USE OR PERFORMANCE OF MANUFACTURER’S PRODUCTS, INCLUDING SPECIFI-

THE USE OR PERFORMANCE OF MANUFACTURER’S PRODUCTS, INCLUDING SPECIFI-THE USE OR PERFORMANCE OF MANUFACTURER’S PRODUCTS, INCLUDING SPECIFI­CALLY LIABILITY IN TORT.CALLY LIABILITY IN TORT.

CALLY LIABILITY IN TORT.

CALLY LIABILITY IN TORT.CALLY LIABILITY IN TORT.

must must

must understand all aspects of the operation of this product

must must

THIS WARRANTY IS IN LIEU OF ALL OTHERTHIS WARRANTY IS IN LIEU OF ALL OTHER

THIS WARRANTY IS IN LIEU OF ALL OTHER

THIS WARRANTY IS IN LIEU OF ALL OTHERTHIS WARRANTY IS IN LIEU OF ALL OTHER

2

IntroductionIntroduction

Introduction

IntroductionIntroduction

Congratulations on purchasing the Ultimate Bar Graph Engine Analyzer (UBG), one of the most sophisticated
diagnostic tools available in general aviation. You can learn the basic operation of the UBG in the first few
minutes of hands-on operation. Although the UBG is simple to operate, its capabilities are numerous.

The UBG is shipped from the factory with all of the programmed limits turned off. This allows you to learn the
basic operation of the UBG without having to deal with alarms or programming limits. As you become comfort­able operating the UBG, you can start using more of its features.

Mode Selector Switch:Mode Selector Switch:

Mode Selector Switch:

Mode Selector Switch:Mode Selector Switch:

Each time the Mode Switch is pressed to the right, the UBG will advance to the next operating mode. There are
three modes of operation: Normal, Normalized and Lean. The top of the display will indicate in which mode the
UBG is operating. In the Normal Mode (figure 1), there is no indication at the top of the display. In the Normal­ized Mode (figure 2), the word “NORMALIZED” appears at the top of the display, and in the Lean Mode (figure

3) the word “LEAN” appears.
Also, when switching between the three operating modes, “NORMAL”, NORMALZD” or “LEAN” appears in

the digital display when entering a mode, for as long as the Mode Switch is held to the right. This allows you to
see what mode the UBG is entering even if the top of the display is not visible.

The left position of the Mode Selector Switch is used for programming, which will be covered later in this
manual.

Figure 1Figure 1

Figure 1

Figure 1Figure 1

Mode SwitchMode Switch

Mode Switch

Mode SwitchMode Switch

Normal Operating Mode:Normal Operating Mode:

Normal Operating Mode:

Normal Operating Mode:Normal Operating Mode:

In the Normal Operating Mode, the EGTs are indicated by the height of the lit bars in each of the columns. The
CHTs are indicated by the height of the blanked bars in each of the columns. A CHT of 300’F will cause the
second bar from the bottom to blank. The scaling of the blanked CHT bars is 33’F per bar.

Figure 2Figure 2

Figure 2

Figure 2Figure 2

Figure 3Figure 3

Figure 3

Figure 3Figure 3

3

The Bar Graph Display allows visual comparison of EGTs and CHTs at a glance. It also allows you to see where
the EGTs and CHTs are operating in their normal operating range (i.e., high EGTs will be displayed with many
bars lit in a column and low EGTs will be displayed with few bars lit in a column).

The scaling and range of the EGT columns of bars may be customized to accommodate any engine or pilot’s
preference (see the “Programming the Range of the EGT Columns of Bars” section of this manual).

Step Switch:Step Switch:

Step Switch:

Step Switch:Step Switch:

When operating in the Normal or Normalized Operating Mode, each time the Step Switch is pushed to the right
the UBG will advance the digital display to show the next temperature or function. Each time the Step Switch is
pushed to the left the digital display will show the previous temperature or function.

Each time the Step Switch is pushed to the right, the UBG indicates the following temperatures or functions in the
digital display:

1. Displaying the EGTs and CHTs:1. Displaying the EGTs and CHTs:

1. Displaying the EGTs and CHTs:

1. Displaying the EGTs and CHTs:1. Displaying the EGTs and CHTs:

The EGTs and CHTs will be indicated in the digital display, beginning
with cylinder #1. The left side of the digital display will indicate
exhaust gas temperatures and the right side of the digital display will
indicate cylinder head temperatures. The lit box around a specific
cylinder number (located at the top of the columns) coincides with
which cylinder is being digitally displayed. Each time the Step Switch
is pushed to the right the next cylinder will be displayed.

Step SwitchStep Switch

Step Switch

Step SwitchStep Switch

2. Displaying a Temperature on the 7th Column of Bars:2. Displaying a Temperature on the 7th Column of Bars:

2. Displaying a Temperature on the 7th Column of Bars:

2. Displaying a Temperature on the 7th Column of Bars:2. Displaying a Temperature on the 7th Column of Bars:

If installed in a 4 or 6-cylinder engine, after the last EGT channel has been displayed on the UBG, push the
Step Switch once to the right to digitally display the temperature on the 7th column of bars (if the 7th
column is activated). The 7th column of bars may be used to display
EGT and CHT (on a 7-cylinder engine), or TIT or Oil Temperature (on
a 4 or 6-cylinder engine), or it may be turned OFF. Installation and
programming of the UBG will determine what, if any, function will be
displayed on column 7.

The scaling and range of the 7th column of bars may be customized
(independent of the EGT columns) to accommodate any engine or
pilot’s preference (see “Programming the Range of the 7th Column of
Bars”).

4

3. Displaying Other Temperatures and/or Functions Digitally:3. Displaying Other Temperatures and/or Functions Digitally:

3. Displaying Other Temperatures and/or Functions Digitally:

3. Displaying Other Temperatures and/or Functions Digitally:3. Displaying Other Temperatures and/or Functions Digitally:

There are a total of 16 input channels on the UBG. The columns
of bars can display EGT, CHT, TIT or Oil. Other functions will be
indicated only in the digital display. While viewing the digital
readout for the last column of bars, push the Step Switch to the
right to display the next temperature or function connected to the
UBG’s input channels.

Note:Note:

Note: While viewing OAT, the digital display may be toggled

Note:Note:
between degrees F and degrees C by pushing the Mode Switch to
the left.

4. Displaying the Shock Cooling Rate:4. Displaying the Shock Cooling Rate:

4. Displaying the Shock Cooling Rate:

4. Displaying the Shock Cooling Rate:4. Displaying the Shock Cooling Rate:

While the last monitored temperature or function is being dis­played, push the step switch once to the right to see the Shock
Cooling Rate in the digital display. This is the rate (in degrees F
per minute) at which the indicated cylinder head temperature is
cooling. Normally, cooling will occur only during descent. The
Cylinder Number inside the lit box at the top of the columns is the
programmed shock cooling cylinder being displayed.

Note: An aircraft engine can not be shock cooled when cylinder
head temperatures are below 300'F. For this reason, the UBG-16
will display "-00" when the CHT drops below 300'F.

A Shock Cooling Limit and the cylinder to be monitored for shock cooling are programmable (see
“Programming the Shock Cooling Limit and Cylinder”).

5. Displaying the Peak EGT and Cylinder:5. Displaying the Peak EGT and Cylinder:

5. Displaying the Peak EGT and Cylinder:

5. Displaying the Peak EGT and Cylinder:5. Displaying the Peak EGT and Cylinder:

While the Shock Cooling Rate is being displayed, push the Step Switch once to the right to display the
Peak EGT achieved during the last leaning session. The cylinder
number inside the lit box at the top of the columns is the cylinder
which first reached peak EGT. If you have not leaned the aircraft
during this flight, the Peak EGT from the last time you leaned your
engine will be retrieved from long-term memory and will be
displayed.

Note:Note:

Note: When viewing Peak EGT, the display may be toggled

Note:Note:
between Profile and Peak EGT by pushing the Mode Switch to the
left. While showing Profile, each cylinder’s fuel/air mixture
distribution is displayed in the Bar Graph Display. This is an
advanced feature of the UBG and is described in detail at the back
of this manual.

5

6. Displaying the EGT Difference:6. Displaying the EGT Difference:

6. Displaying the EGT Difference:

6. Displaying the EGT Difference:6. Displaying the EGT Difference:

While the Peak EGT is being displayed, push the Step Switch once to the right to
display the difference between the hottest and coldest EGT. A programmable limit may
be set to alert you when the EGT Differential Limit is exceeded (see “Programming the
EGT Differential Limit”).

Scanning Through the Channels Automatically:Scanning Through the Channels Automatically:

Scanning Through the Channels Automatically:

Scanning Through the Channels Automatically:Scanning Through the Channels Automatically:

When operating in the Normal or Normalized Operating Mode, by pushing
and holding the step switch to the right until the word “SCAN” appears in the
digital display, you may set the UBG to automatically scan the digital display
through the various temperatures and/or functions being monitored. The
length of time a temperature or function will be displayed is programmable.
To cancel the Scan operation, push the step switch to the right or left, or push
the Mode Switch to the right.

If a limit is violated while operating in the Scan Mode, the scan will stop
and the UBG will display the channel with the violation.

When operating in the
grammed by performing the following steps:

1.1.

1. Push and hold the Mode Switch to the left until the word “PROGRAM” appears in the digital display.

1.1.
When the Mode Switch is released, the word “SCAN R. X” will appear in the digital display. The number
blinking (X) in the right portion of the digital display is the Scan Rate in seconds.

22

2. Push the Step Switch right or left to increase or decrease the Scan Rate.

22
33

3. To exit this programming mode, push and hold the Mode Switch to the left until the word “END” ap-

33
pears in the digital display.

Normalized Operating Mode:Normalized Operating Mode:

Normalized Operating Mode:

Normalized Operating Mode:Normalized Operating Mode:

The purpose of the Normalized Operating Mode is to be able to compare
current engine operation to prior engine operation.

Once the height of the EGT columns has been normalized (brought to the
same level), any abnormal change in the engine’s EGTs will show up as an
abnormally high or low column of bars. In this way you can see temperature
trends over weeks, months or years. The Bar Graph Display provides a
graph of long-term trend, allowing you to spot problems easily.

Scan Mode onlyScan Mode only

Scan Mode only, the Scan Rate may be pro-

Scan Mode onlyScan Mode only

6

It is recommended that the EGT columns be normalized while operating your aircraft in normal cruise
flight, with the engine leaned.
normalized on the UBG display by performing the following steps:

1.1.

1. Push and hold the Mode Switch to the left until “PROGRAM” appears in the digital display. Release the

1.1.
Mode Switch and the digital display will show “Normalize N”.

2.2.

2. Push the Step Switch right or left to change the “N” to a “Y” ("NO" to a "YES").

2.2.

3.3.

3. To exit this programming mode, push and hold the Mode Switch to the left until the word “END” ap-

3.3.
pears in the digital display.

Note:Note:

Note: The TIT column of bars will not be affected by normalizing the EGT columns.

Note:Note:

Normalizing brings the EGT columns to the same height and stores the data in memory. Once the EGTs are
normalized, each time you operate your aircraft in normal cruise flight with your engine leaned, you may put the
UBG into its Normalized Operating Mode and look for abnormally high or low columns of bars. Many problems
occur slowly over time. The UBG’s Normalized Operating Mode helps you spot these problems as they occur.

When operating in the

Normalized Mode onlyNormalized Mode only

Normalized Mode only, the EGT bars may be

Normalized Mode onlyNormalized Mode only

Lean Operating Mode:Lean Operating Mode:

Lean Operating Mode:

Lean Operating Mode:Lean Operating Mode:

This manual does not make any recommendations as to specific exhaust gas temperature(s) at which to lean your
engine. Check the airframe and/or engine manufacturer’s recommendations to properly lean your engine. It is the
pilot’s responsibility to lean the engine properly.

We recommend leaning your engine in cruise. A rich running engine wastes fuel and tends to run rough. Good
leaning techniques result in cleaner combustion chambers with fewer lead salt deposits on the pistons and exhaust
valves. Also, proper leaning means less spark plug fouling, longer life for the plugs, reduced maintenance costs
and a considerable fuel savings. Furthermore, proper leaning at cruise during cool or cold weather aids in
raising engine and oil temperatures to desirable minimums in order to evaporate the water and acids out of
the oil. Water and acids attack the insides of an engine, causing rust and corrosion.

When you enter the Lean Operating Mode of the UBG, the right portion of
the digital display will show the current EGT for the cylinder which peaked
first the last time you leaned your engine. The word “LEAN” will be
displayed in the left portion of the digital display. The UBG will not activate
the Lean Operating Mode until the hottest EGT has raised 10’F.

Most engines will exhibit a 200 to 350’F rise in EGTs before a cylinder
reaches peak. Start the leaning process by rough leaning your engine near
peak EGT (pull the mixture back to a predetermined setting or use a fuel
flow instrument). Experience should be your guide. Do not lean past
peak EGT during rough leaning.

Note: Note:

Note:

Note: Note:

It is not recommended to lean an engine for peak EGT above 75% power setting.It is not recommended to lean an engine for peak EGT above 75% power setting.

It is not recommended to lean an engine for peak EGT above 75% power setting.

It is not recommended to lean an engine for peak EGT above 75% power setting.It is not recommended to lean an engine for peak EGT above 75% power setting.

7