Electronics CA-1 User Manual
0906941
Single and Multi-Channel
EGT, CHT, Carb Temp and OAT Instruments
Operating and Installation Instructions
OII 0906941
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.
9/6/94
(This manual covers 25 instruments and remote switches)
(Supersedes OI 070781, II 070781, OI 040831 and II 070781-1)
(FAA Approved)
S/N:_____________________
Electronics International Inc. ®
63296 Powell Butte Hwy Bend, OR 97701 (541) 318-6060 Buy-EI.com
Important Installation Information
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.
0720921
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 Instructions: ----------------------------------------------------------- 3
Features ------------------------------------------------------------------------------------------ 3
EGT's --------------------------------------------------------------------------------------------- 4
CHT's -------------------------------------------------------------------------------------------- 7
Carburetor Temperature ----------------------------------------------------------------------- 8
Outside Air Temperature ---------------------------------------------------------------------- 8
Installation Instructions: ---------------------------------------------------------- 9
1. Important Information and Initial Check Out ------------------------------------------ 9
2. CHT Probe Installation ------------------------------------------------------------------- 10
3. EGT Probe Installation -------------------------------------------------------------------- 10
4. Carb. Temp. Probe Installation ---------------------------------------------------------- 10
5. OAT Probe Installation ------------------------------------------------------------------- 11
6. Route the Extension Cables -------------------------------------------------------------- 11
7. Hook Up Connecting Wires -------------------------------------------------------------- 13
8. Connect and Install the Instrument and/or Remote Switch ------------------------- 13
9. System Ground Test ----------------------------------------------------------------------- 13
Troubleshooting Suggestions ---------------------------------------------------- 14
1. Instrument Check Out --------------------------------------------------------------------- 14
2. Probe Check Out --------------------------------------------------------------------------- 14
3. Extension Cable Check Out -------------------------------------------------------------- 14
Specifications and Operating Features ----------------------------------------- 16
Instrument Wiring Diagram ----------------------------------------------------- 17
Remote Switch Diagram
(RS-4-1, RS-4-2, RS-6-1, and RS-6-2) ----------------- 18
Remote Switch Diagram (RS-8-1 and RS-12-1) ---------------------------------- 19
STC Information ------------------------------------------------------------------ 20
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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
OPERATING INSTRUCTIONS
Features
1. Instruments:
The Electronics International line of single and multi-channel instruments offer the following features:
A. Digital Display - The digital display allows you to read absolute temperatures at a glance. It does
not require interpretation of dials or tic marks. In a short period of time you will be come familiar with
the normal operating temperatures of your engine. Abnormal temperatures will be easy to spot. The
digital display is easily viewable in direct sunlight. If the instrument backlight has been permanently
powered up (as recommended), the digital display will be easier to see during low ambient light conditions and at night.
B. 1 Degree Resolution - The digital display resolves temperatures to 1 degree. This allows you to
interpret trends quickly. This can be very helpful in diagnosing problems and leaning your engine.
Also, any unit may be ordered to display in degrees F or degrees C.
C. 1/2% Accuracy - Electronics International instruments are not affected by shake, shock, vibration,
tilt, stick-slip, bearing wear, spring wear, lead resistance, probe resistance, magnetic fields or the many
other factors that plague analog instrument accuracy. All E.I. instruments are temperature compensated
to read cabin temperature when a probe is disconnected. E.I. instruments should never need
recalibration. Carburetor and outside air temperatures are measured on precision channels. If a non-
precision channel (i.e., EGT, CHT, etc.) is used to measure Carb. Temp or OAT there can be a
several degree temperature error. A precision channel uses a single yellow connector.
D. Flexibility - Electronics International instruments are compatible with any type K ungrounded
probe. This means any instrument, regardless of what is printed on the front panel (EGT, CHT, OAT,
etc.), will work with any of our probes (i.e., an OAT channel can read EGT or CHT probes accurately).
Also, lead resistance does not affect the accuracy of these units. You may use any length extension
cable between the unit and the probe without affecting the accuracy of the instrument.
E. Upgradable - Any single channel EGT and/or CHT unit may be upgraded to a full multi-channel
analyzer by simply adding a remote switch to the system. The instruments, remote switches, extension
cables and probes were designed in a modular fashion with slip-on connectors. This means a remote
switch may be added to your existing system by simply mounting it into your instrument panel, installing the additional wires and probes and plugging it in. You do not have to buy a new system to upgrade
to a full analyzer.
Ice Zone Warning Light. Only available on
the Carb. Temp/OAT instruments.
Digital Display.
Selector Switch.
3
2. Remote Switches:
Instrument displaying
EGT for channel #2.
EGT'sOperating Instructions
A remote switch may be connected to any channel on any Electronics International
Instrument. This gives the instrument multi-channel capability. There are two types
of remote switches available, single deck and double deck. If a single deck four
channel remote switch (RS-4-1) is connected to the EGT channel on an EC-1, the
instrument would be capable of measuring four EGT's and one CHT. The remote
switch will select which EGT channel would be displayed on the EC-1 instrument
when the instruments selector switch is placed in the EGT position. If a double deck
four channel remote switch (RS-4-2) is connected to the EGT and CHT channels on
an EC-1, the instrument will be capable of measuring four EGT's and four CHT's.
The EC-1 will select wether EGT or CHT will be displayed. The Remote Switch will
select which channel will be displayed.
EGT's
1. Leaning:
You will want to lean your engine in cruise. A rich running engine wastes fuel needlessly and tends to run
rough. This creates vibration, which causes deterioration of engine accessories and engine mounts. Also,
proper leaning at cruise and during descent means less spark plug fouling, longer life for the plugs, reduced
maintenance costs and considerable fuel savings. Furthermore, good leaning techniques result in cleaner
combustion chambers with fewer lead salt deposits on the pistons and exhaust valves. Under certain conditions, these deposits invite preignition and higher maintenance costs. 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.
To properly lean your engine using a multi-channel analyzer perform the following steps:
A. Rough Leaning: Select the hottest EGT cylinder. Adjust the mixture control from the full rich
position to a leaner setting that results in a slight drop in engine RPM or to a setting near peak EGT, as
dictated by experience. The mixture control should be left at this setting until the EGTs stabilize. It
will take about 20 seconds for the temperatures to stabilize within 1`F. This lag is due to the combustion walls and piston domes increasing in temperature, which affect the combustion and exhaust gas
temperatures. To correctly lean an engine you must wait for the engine to thermally stabilize. Less
sensitive gauges will not pick up these subtle changes, which are important in leaning and diagnosing
problems.
B. Precision Leaning: Again select the hottest EGT cylinder. This cylinder may be different than the
one you started with. This is the cylinder on which you should perform your precision leaning. Again,
start leaning, making only very small adjustments and waiting 3 to 5 seconds between adjustments. As
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