Electronics US-8A User Manual
S1004911
Ultimate Engine Analyzer
(US-8A)
Operating and Installation Instructions
OI072491 and II072091
7/20/89
Rev. B: 2/1/93 *
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.
S/N:
Electronics International Inc. ®
63296 Powell Butte Hwy Bend, OR 97701 (541) 318-6060 Buy-EI.com
All steps must be read before installing a probe.
F
1. Leave slack in the cable to allow
for engine movement and vibration.
S.S. Washer.
2. Do Not Overtighten.
Over time, tight wire
wraps will cause the wire
to break.
Hose Clamp.
E
Male Conn.
3. Both clip rings must be on
the inside of the hose clamp.
The rubber band is used to hold
the washer on during shipping.
4. The tab inside the male connector must be centered (not
bent up or down) to mate properly. Check each connector
before installation. Two drops of oil on the connector will
protect it from corrosion for many years.
5. If you remove a connector, double over the wire
before installing it into a new connector. Each connector must be double crimped very tightly.
6. If connectors have been disconnected several times the female connector may become
loose. If this happens use a pair of needle nose pliers to retighten the female recep-
tacle then mate the connectors.
Important Notice
***** MUST READ *****
If you think it is not important to read this manual, you're wrong! This manual
contains important installation information that may affect the safety of your aircraft, delay your installation or affect the operation of your instrument. You
read this manual prior to installing your instrument. Any deviation from these
installation instructions is the sole responsibility of the installer/pilot and may
render the STC invalid.
Read the Warranty / Agreement. There is information in the Warranty / Agreement that may alter
your decision to install this product. If you do not accept the terms of the Warranty / Agreement, do not
install this product. This product may be returned for a refund. Contact Electronics International inc. for
details.
Check that the instrument make and model marked on the side of the instrument and on the invoice are
correct before starting the installation.
Must
It is possible for any instrument to fail thereby displaying inaccurate high, low or jumpy readings.
Therefore, you must be able to recognize an instrument failure and you must be proficient in operating your
aircraft safely in spite of an instrument failure. If you do not have this knowledge, contact the FAA or a
local flight instructor for training.
The pilot
to operate the aircraft that does not know the operation of this product. Keep the Operating Manual in the
aircraft at all times.
must understand the operation of this product before flying the aircraft. Do not allow anyone
Contents
Warranty ---------------------------------------------------------------------------- 2
Operating Information: ----------------------------------------------------------- 3
Introduction ------------------------------------------------------------------------------------- 3
Features ------------------------------------------------------------------------------------------ 3
Programming ------------------------------------------------------------------------------------ 6
Selecting The Proper Limits ------------------------------------------------------------------ 10
Operating The Ultimate Analyzer in Your Aircraft --------------------------------------- 15
Installation Instructions: ---------------------------------------------------------- 18
1. Important Information and Initial Check Out ---------------------------------------------- 18
2. CHT Probe Installation ------------------------------------------------------------------- 18.5
3. EGT Probe Installation ------------------------------------------------------------------- 19
4. TIT Probe Installation -------------------------------------------------------------------- 19
5. Oil Temperature Probe Installation ----------------------------------------------------- 19
6. Carb. Temp. Probe Installation ---------------------------------------------------------- 20
7. OAT Probe Installation -------------------------------------------------------------------- 20
8. Add any Aditional Cables and Mark each Cable ------------------------------------------- 20
9. Route The Circular Connector ------------------------------------------------------------ 21
10. Route Each Extension Cable ------------------------------------------------------------- 21
11. Hook Up Connecting Wires -------------------------------------------------------------- 23
12. Instrument Installation -------------------------------------------------------------------- 23
13. System Ground Test ----------------------------------------------------------------------- 24
Wiring Diagrams ------------------------------------------------------------------ 25
Troubleshooting Suggestions ---------------------------------------------------- 28
Specifications and Operating Features ----------------------------------------- 30
Appendix A - Adding a Channel to the US-8A -------------------------------- 32
Appendix B - US-8A Circular Connectors ------------------------------------- 33
STC Information ------------------------------------------------------------------ 34
1
Warranty / 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 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. This warranty
does not cover any reimbursement for any persons time for installation, removal, assembly or repair.
Electronics International retains the right to determine the reason or cause for warranty repair.
2. This warranty 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.
5. Personal injury or property damage do to misinterpretation or lack of understanding this product is solely the
pilots responsibility. The pilot must understand the operation of this product before flying the aircraft. Do not
allow anyone to operate the aircraft that does not know the operation of this product. Keep the Operating Manual
in the aircraft at all times.
6. E. I. 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.
8. If you do not agree to and accept the terms of this warranty, you may return the product for a
refund.
This Warranty is made only to the original user. THIS WARRANTY IS IN LIEU OF ALL OTHER
WARRANTIES OR OBLIGATIONS: EXPRESS OR IMPLIED. MANUFACTURER EXPRESSLY
DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. PURCHASER AGREES THAT IN NO EVENT SHALL MANUFACTURER BE LIABLE FOR SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE OR OTHER ECONOMIC LOSS. EXCEPT AS
EXPRESSLY PROVIDED HEREIN, MANUFACTURER DISCLAIMS ALL OTHER LIABILITY
TO PURCHASER OR ANY OTHER PERSON IN CONNECTION WITH THE USE OR PERFORMANCE OF MANUFACTURERS PRODUCTS, INCLUDING SPECIFICALLY LIABILITY IN
TORT.
2
US-8A
S1004911
OPERATING INFORMATION
OI 072491
Rev. A 10/04/91
Introduction
The Ultimate Analyzer is one of the most sophisticated diagnostic tools you can buy for your aircraft. You can
learn the basic operation of this unit in the first few minutes of hands-on operation. Although the Ultimate
Analyzer is simple to operate, its capabilities are numerous. This manual covers the operation of the Ultimate
Analyzer in the following four sections:
1. Features - Describes the operating features of the Ultimate Analyzer.
2. Programming - Describes how to program the Ultimate Analyzer.
3. Selecting the Proper Limits - Describes how to select the limits that should be programmed into the
Ultimate Analyzer.
4. Operating the Ultimate Analyzer in Your Aircraft - Describes how to operate the Ultimate Analyzer
for the different phases of a flight (taxi, run-up, takeoff, climb, cruise and descent).
Temperature Problem
Warning Lights
Left Display Window
Left Peak
Locate Switch
Features
Temp Prob
1473
482
Mode Selector Switch:
Left Position = Scan Mode
Center Position = Manual Mode
Right Position = Step
3
Right Display Window
Channel
Indicators (8ea.)
Right Peak
Locate Switch
Operating Information
1. Multi-Function Capability:
The Ultimate Analyzer has up to 16-channel capability, 8 for each of the displays. For a 6-cylinder single
engine aircraft, the first 6 channels on the left display should be used for EGT and the first 6 channels on the
right display should be used for CHT. For a twin-engine aircraft the first 6 channels should be left EGT and
right EGT. These channels are designated as analyzer channels. The Peak Locate, Hottest Cylinder Indicator and Differential Warning features are only functional on the analyzer channels. The number of analyzer
channels is independently programmable from 1 to 8 for each display. The High-Temp and Low-Temp
features are functional on all channels and may be used to measure any temperature (TIT, Oil, EGT, CHT,
OAT, Carb, Induction Air, Cabin Air, Cowling Air, Intercooler, Water, etc.).
2. Mode Select Switch:
A) Manual Mode - With the Mode Select Switch in the center position, the Ultimate Analyzer will display
the temperatures on the channel designated by the green Channel Indicators. No other channels are being
monitored at this time. In the Manual Mode the Shock-Cooling and High-Temp warning features are enabled
for only the channel displayed. The Low-Temp and Differential warning features are disabled so you may
operate the aircraft at idle and taxi without getting warning lights.
Features
B) Step Position - Each time the Mode Select Switch is pressed to the right, the Ultimate Analyzer will
advance to the next channel. When this switch is released, it will return to the center position (Manual
Mode). The Ultimate Analyzer can be programmed from the front panel to step through 2 to 8 channels.
C) Scan Mode - In the Scan Mode, the Ultimate Analyzer will scan through the channels, automatically
analyzing your engine. When the unit is first placed into the Scan Mode, it will switch to Channel One to
start its scan. This is done to establish a reference for the automatic engine analysis features.
In the Scan Mode the High-Limits, Low-Limits, and Differential warning features are enabled. The ShockCooling feature is disabled (Shock-Cooling is only a problem during descents).
The Ultimate Analyzer may be placed in the Scan Mode during run up, takeoff, climb or cruise, as long as
the engine temperatures are increasing or stable and above the programmed lower limits. This unique
operating characteristic allows the Ultimate Analyzer to stand watch over your engine during most phases of
a flight. But if the engine temperatures are decreasing (which would occur on a descent) or low (which
would occur at idle, the Ultimate Analyzer should be placed into the Manual Mode of operation to eliminate
any false Low or Differential Condition problems it may find and to enable the automatic Shock-Cooling
detection feature.
3. Peak Locate Switch:
There are two Peak Locate Switches, one for the left display and one for the right. The Peak Locate feature
may be used in the Manual or Scan Mode of operation. Its purpose is to eliminate all of the mental calcula-
4
tions and time to find the hottest cylinder. This can be a real asset in leaning or locating a possible problem.
When used for EGT leaning, it should be noted that the leanest cylinder is not always the hottest; but it is the
cylinder you want to start your leaning process on. Precision leaning will then be done to 1'F and the
Cylinder will be verified. Leaning will be covered later in this manual.
A) Manual Mode - To find the hottest analyzer cylinder in the Manual Mode, press the Peak button. The
Ultimate Analyzer will automatically switch to Channel One and start a fast scan (one second per channel).
It will only scan through the analyzer channels and jump to the hottest channel when done.
B) Scan Mode - You may also use the Peak Locate feature in the Scan Mode. The Ultimate Analyzer will
operate the same as in the Manual Mode. After it has found the hottest analyzer channel it will continue
scanning at the programmed scan rate.
4. Hottest Cylinder Indicator:
In the Scan Mode only, the Ultimate Analyzer will light a bar high in the left hand corner of the display any
time it is displaying the hottest analyzer cylinder. This feature allows you to determine if the leanest cylinder
has changed. If this happens, you may need to readjust your mixture.
FeaturesOperating Information
Leanest
5. Temp Prob Warning Lights (Automatic Engine Analysis):
A) High-Temp Problem (Scan and Manual Modes) - If the temperature being displayed exceeds the
programmed limit, the Temp Prob warning light over the appropriate display will come on. Also, there
will be a bar high in the left hand corner of the display. If you are in the scan mode, the scan will stop on the
problem channel.
B) Low-Temp Problem (Scan Mode only) - If the temperature being displayed is less than the programmed
Low Limit, the Temp Prob warning light over the appropriate display will come on. Also, there will be a
bar low in the left hand corner of the display and the scan will stop on the problem channel.
C) Differential Temp Problem (Scan Mode only) - Any time the temperature difference between the
hottest and coldest channel exceeds the programmed differential limit the Temp Prob warning light over
the appropriate display will come on. Also, the high and low bar in the left hand corner of the display will
alternately blink and the Ultimate Analyzer will stop on the coldest cylinder. In this case, the problem may
be the coldest cylinder or it may be the hottest cylinder. By comparing temperatures with adjacent cylinders
the problem cylinder will become apparent. To quickly find the hottest cylinder, press the PK button on
the front panel.
D) Shock-Cooling Temp Problem (Manual Mode only) - Any time you are on a channel on which the High
Limit has been programmed between 300F and 600F (this indicates a CHT channel) and the temperature
being monitored is between 300F and 600F (this is the critical range of cylinder head temperatures) and the
temperature is decreasing faster than the programmed limit, the appropriate Temp Prob warning light will
blink.
5
Operating Information
NOTE: The Ultimate Analyzer will stop on the first channel on which it finds a problem and light the
appropriate Temp Prob warning light. If the problem corrects itself, the Temp Prob warning light will go
out and the Ultimate Analyzer will continue its scan.
6. Back Light and Green Channel Indicator Intensity:
The Ultimate Analyzer comes with 12 and 24 volt digital display back light control lines. The digital display
should be backlit all the time. This will allow it to be easily viewed in dim light. The digital display is best
viewed in high ambient light or direct sunlight.
Also provided is a Green Channel Indicator Intensity Control Line. If this line is connected to your Panel
Light Rheostat, the Green Channel Indicators intensity can be controlled for night operation. As the Panel
Light Rheostat is turned up the Green Channel Indicators will dim. If you find the Green Channel Indicators
to be too bright during daytime operation, turn the Panel Light Rheostat up slightly to control the intensity of
the Green Channel Indicators to suit your requirements.
Features
Programming
Although programming may be new to some of you, programming the Ultimate Analyzer is simple. After a
few tries, you should have the hang of it. No matter which buttons you push or limits you set you cannot hurt
the Ultimate Analyzer and any limit can be reset.
Your objective is to set the limits on the Ultimate Analyzer just outside the normal operating temperatures for
each measured parameter (see Selecting the Proper Limits section of this manual). The 36 programmable
limits allow you to characterize the Ultimate Analyzer to your engine. That means trend analysis and problem detection is done automatically every 16 seconds and you are alerted as soon as a problem starts to occur
(i.e., if an engine temperature starts to drift high or low from its normal operating temperature range it will be
detected by a High, Low or Differential limit). This is a far better method of trend analysis than pouring over
pages of data every six months.
The golden rule for setting the limits on the Ultimate Analyzer is No Red Light During Take-Off, Climb or
Cruise. The following sections will describe how to program the Ultimate Analyzer.
1. Manual Programming Mode:
There are two programming modes: Manual and Scan. In the Manual Mode you can program the High
Limits, Low Limits, Differential Limits and Shock-Cooling Limits for both the left and right displays.
Before setting your limits it may be helpful to read the Selecting the Proper Limits section of this manual
to get an idea where the limit should be set.
6
Operating Information
To enter the Manual Programming Mode, select the channel you would like to program using the Stp
position on the Mode Selector Switch. Then with the Mode Selector Switch in the center position, push both
Pk buttons at the same time. This will put you in the Manual Programming Mode displaying the High
Limit for the channel you selected.
A) Programming a High Limit - There will be a bar in the upper far left corner of the left and right Display
Windows. This high bar indicates you are programming the High Limit. The digit blinking is the only digit
you can program at this time.
High
Bar
Programming
1650
Blinking Digit
1) Select a Digit - The left and right Peak Locate Switches can be used to select the desired digit you
would like to program. Push the right button to select the next digit to the right of the one currently
blinking. Push the left button to select the next digit to the left of the one currently blinking. In this
same manner you can select a digit in the left or right window.
2) Advance a Digits Count - Use the Step Position on the Mode Selector Switch to advance the
blinking digit to the desired limit you would like. When the digit is advanced past 9 (19 for the far left
digit) it will reset to 0. Programming all digits to 0000 will disable the High Limit.
3) Changing Functions - If you are done programming the High Limits for this channel and would
like to program the Low limits, place the Mode Selector Switch in the Scan position. In this manner the
Mode Selector Switch will call up the different functions in the following sequence:
High Limit (set on each channel).
Low Limit (set on each channel).
Differential Limit (set once, shows up on all channels).
1650
Shock-Cooling Limit (set once, shows up on all channels).
4) Leaving the Programming Mode - You may leave the programming mode at any time by pushing
both Peak Buttons at the same time. When this is done, the programmed information is stored in an
EEPROM memory for life, unless you program in new limits. The Ultimate Analyzer does not use any
internal batteries and the information will not be lost if the unit is disconnected from power or removed
from the aircraft.
7
ProgrammingOperating Information
B) Programming the Low Limit - If you have selected the Low Limit to be programmed there will be a bar
low in the far left hand corner of the left and right Display Windows. This bar indicates you are programming the Low Limit. The Low Limit may be programmed as shown in steps A-1 and A-2.
To move from programming the Low Limit to programming the Differential Limit, place the Mode Selector
Switch in the Scn position once again. If the Differential limits and Shock-Cooling limits have already
been set, you may want to leave the programming mode at this time (see step A-4). Differential and ShockCooling Limits will show up on each channel even though they only need to be programmed one time.
C) Programming the Differential Limit - There will be NO bars in the far left hand corner of the left and
right Display Windows. This indicates you are programming the Differential Limit. The Differential Limit
sets the maximum allowed difference between the hottest cylinder and the coolest cylinder for the analyzer
channels only. Analyzer channels would be EGTs or CHTs and always start with channel one. There is
only one Differential Limit for each Display Window. This limit can be set on any channel but only needs to
be set once. The Differential Limit may be programmed as shown in steps A-1 and A-2.
To program the Shock-Cooling Limit, place the Mode Selector Switch in the Scan position once again.
D) Programming the Shock-Cooling Limit - The Shock-Cooling limit will be preceded by an Sc in the
left and right Display Windows. The limit is displayed in seconds per one degree change. The ShockCooling Limit may be programmed as shown in steps A-1 and A-2.
Sc3
Blinking Digit
To program the High Limit, place the Mode Selector Switch in the Scan position once again and go to step A.
Every time you go to the Scan position you will be selecting the programmable limits as follows:
High Limit (set on each channel).
Low Limit (set on each channel).
Differential Limit (set once, shows up on all channels).
Shock-Cooling Limit (set once, shows up on all channels).
Sc3
To leave the programming mode, see step A-4.
8
ProgrammingOperating Information
2. Scan Programming Mode:
There are two programming modes: Manual and Scan. In the Scan Mode you can program the following
functions in the sequence listed below:
Scan Rate.
Last Channel to be scanned.
Analyzer Channels (6 EGTs, 6 CHTs, etc).
To enter the Scan Programming Mode, place the Mode Selector Switch in the Scan position and push both
Peak buttons at the same time. It does not matter which channel is being displayed when you do this.
A) Programming the Scan Rate - In the left display will be the letters Scn, indicating you are programming the Scan Rate. In the right display will be the Scan Rate displayed in seconds. This number indicates
the time the Ultimate Analyzer will display a channel before stepping to the next channel. The Scan Rate
may be programmed from 2 to 9 seconds per channel by using the Stp Position on the Mode Selector
Switch.
Scn 002
To program the Last Channel to be scanned, place the Mode Selector Switch in the Scn Position once
again.
B) Programming the Last Channel - In the left display will be the letters Ch, indicating you are programming the Last Channel to be used. In the right display will be the last channel the Ultimate Analyzer will
display before resetting to channel one. The Last Channel may be set by using the Step Position on the Mode
Selector Switch.
Ch
To program the Analyzer Channels, place the Mode Selector Switch in the Scan Position once again.
C) Programming the Analyzer Channels - In the left and right display will be 1-?, indicating you are
programming the Analyzer Channels. The "?" will be a number between 1 and 8 and is programmable. If
you have a 6-cylinder engine and have the left display channels 1 through 6 connected to EGTs and the right
display channels 1 through 6 connected to CHTs, you would program the left and right display for 1-6 (a
008
9
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