Electronics SR-8A User Manual
Smart Engine Analyzer
(SR-8A)
Operating and Installation Instructions
OI 020481 and II 012881
1/28/88
Rev. C: 2/2/93 *
You must read this manual before installing or operating the instrument.
S0210921
Model:
S/N:
Electronics International Inc. ®
63296 Powell Butte Highway Bend OR 97701 (541) 318-6060
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 ability for this product to detect a problem is directly related to the pilots interpretation and
observation skills.
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
Introduction ---------------------------------------------------------------------------------- 3
Features --------------------------------------------------------------------------------------- 3
Operating The Smart Analyzer in Your Aircraft ---------------------------------------- 6
Installation Instructions: ----------------------------------------------------------- 9
1. Important Information and Initial Check Out -------------------------------------------- 9
2. Instrument Setup ------------------------------------------------------------------------ 9.5
3. CHT Probe Installation ----------------------------------------------------------------- 10
4. EGT Probe Installation ----------------------------------------------------------------- 11
5. TIT Probe Installation ------------------------------------------------------------------ 11
6. Oil Temperature Probe Installation --------------------------------------------------- 11
7. Carb. Temp. Probe Installation -------------------------------------------------------- 12
8. OAT Probe Installation ---------------------------------------------------------------- 12
9. Mark Each Extension Cable ----------------------------------------------------------- 12
10. Route The Circular Connector ------------------------------------------------------- 13
11. Route Each Extension Cable ---------------------------------------------------------- 13
12. Hook Up Connecting Wires ----------------------------------------------------------- 15
13. Instrument Installation ----------------------------------------------------------------- 15
14. System Ground Test -------------------------------------------------------------------- 15
Troubleshooting Suggestions ------------------------------------------------------ 16
Specifications and Operating Features ----------------------------------------- 18
SR-8A Wiring Diagram ------------------------------------------------------------19
SR-8A Sample Wiring Diagram For Single 6-Cylinder Engine Aircraft - 20
Appendix A - Adding a Channel to the SR-8A -------------------------------- 21
Appendix B - SR-8A Circular Connectors ------------------------------------- 22
STC Information --------------------------------------------------------------------23
1
Warranty
1209921
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.
l. 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 responsible for shipping charges or damages incurred under this
Warranty.
5. No representative is authorized to assume any other liability for Electronics International Inc. in
connection with the sale of Electronics International Inc. products.
6. If you do not agree to and accept the terms of this warranty, you may return the product in new
condition, with receipt, within thirty (30) days 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
SR-8
OPERATING INSTRUCTIONS
OI 020481
Rev: A 2/10/92
The Smart Analyzer is easy to operate. You can learn the basic operation of this unit in the first few minutes of
hands-on operation. Although the Smart Analyzer is simple to operate, its capabilities are numerous. The following section will describe the operating features of the Smart Analyzer and some of its capabilities.
Features
1. Multi-Function Capability:
The Smart Analyzer has 8 channels. For a 6-cylinder engine, the first 6 channels should be used for EGT or
CHT engine analysis. 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 EGT
Overtemp and Lowtemp, TIT Overtemp and Lowtemp, and the CHT Overtemp features are functional on all
channels. The Smart Analyzer knows which channels are TIT, EGT and CHT regardless of how it is hooked
up.
Any channel on the Smart Analyzer may be used to measure any temperature (EGT, CHT, TIT, Oil, OAT,
Carb, Induction Air, Cabin Air, Cowling Air, Water, Intercooler, etc.).
3
A set of switches on the back of the Smart Analyzer allows the unit to be set up for a 4 or 6-cylinder engine,
fuel-injected or carbureted engine and to scan 6 or 8 channels (see Installation Instructions for more information).
2. Mode Select Switch:
A) Manual Mode - With the Mode Select Switch in the center position, the Smart Analyzer will display the
temperature on the channel designated by the green Channel Indicators.
B) Step Position - When the Mode Select Switch is pressed to the right, the Smart Analyzer will advance to
the next channel. When this switch is released, it will return to the center position (Manual Mode). The
Smart Analyzer can be set up to step through 6 or 8 channels from the back panel (see Installation Instructions).
C) Scan Mode - In the Scan Mode, the Smart Analyzer will automatically scan through the channels. 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.
FeaturesOperating Instructions
The Smart Analyzer may be placed in the Scan Mode during runup, takeoff, climb or cruise, as long as the
engine temperatures are increasing or stable. This unique operating characteristic allows the Smart Analyzer
to stand watch over your engine during most phases of a flight. But if the engine temperatures are decreasing
or low (as they would be at idle), the Smart Analyzer should be placed into the Manual Mode of operation to
eliminate any false Low limit or Differential Condition problems it may find. Generally this only happens
when the throttle is decreased or you are operating at low throttle settings.
3. Hottest Cylinder Indicator:
In the Scan Mode, an arrow will appear in the display any time the Smart Analyzer 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.
4. "Temp Prob" Warning Light (Automatic Engine Analysis):
A) Manual Mode - In the Manual Mode, if the temperature on the displayed channel exceeds 1650F, the
red Temp Prob warning light over the display will come on, indicating this is a TIT or EGT channel and it
is over its temperature limit. To eliminate false warnings, all other warning features of the Smart Analyzer
are disabled in the Manual Mode of operation.
B) Scan Mode - In the Scan Mode, all the automatic temperature warning features of the Smart Analyzer
are enabled. The scan will stop and the Temp Prob warning light will come on any time one of the following problems occurs:
4
Operating Instructions
1) Any EGT or TIT channel exceeds 1650F.
2) Any CHT channel exceeds 500F.
3) Any EGT or TIT channel drops below 1100F.
4) As an EGT analyzer (when first 4-6 channels on the SR-8A are used to measure EGT's): Any time
the EGT spread between cylinders exceeds 95F for a fuel-injected engine (195F for a carbureted
engine). Also, a DC (Differential Condition) indicator will appear in the display.
5) As a CHT analyzer (when first 4-6 channels on the SR-8A are used to measure CHT's): Any time
the CHT spread between cylinders exceeds 95F (may be programmed to 195F). Also, a DC
(Differential Condition) indicator will appeart in the display.
The Smart Analyzer will stop on the first channel on which it finds a problem and light the Temp Prob
warning light. If the problem corrects itself, the Temp Prob warning light will go out and the Smart
Analyzer will continue its scan. If the problem is a Differential Condition, the Smart 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 of the analyzer channels, press the PEAK botton on the front panel.
Features
5. DC Differential Condition Indicator:
In the Scan Mode, any time there is a temperature spread between any analyzer channel that exceeds the set
limit, the Smart Analyzer will stop the scan, light the Temp Prob warning light and a DC will appear in
the top left corner of the display. This DC indicator will allow you to distinguish a differential problem
from any other type of problem.
6. Scan Rate Adjustment:
The Scan Rate may be adjusted to suit you (2 to 10 seconds per channel). Using a small, flat tip screwdriver,
rotate this adjustment clockwise to increase the time the Smart Analyzer displays each channel. Be careful
not to damage this adjustment. Exert only a light force against the pot when making an adjustment.
7. Peak Locate Button:
The Peak Locate button may be used in the Manual or Scan Mode of operation. Its purpose is to eliminate all
of the mental calculations and time ordinarily required to find the hottest cylinder of the analyzer channels.
This can be a real asset in leaning or locating a possible problem.
A) Manual Mode - To find the hottest analyzer cylinder in the Manual Mode, press the Peak
button. The Smart Analyzer will automatically switch to Channel One and start a fast scan (one
second per channel). It will scan through all the channels, and on the second pass it will stop on the
hottest analyzer channel. If during the fast scan the Temp Prob warning light flashes, the Smart
5
Operating Instructions Features
Analyzer has detected a problem but it will not stop its scan until it reaches the hottest analyzer
channel. (Note: In order to use this feature to lean to an EGT, the first 4-6 channels of the SR-8A
should be used to measure EGT's.)
B) Scan Mode - You may also use the Peak Locate feature in the Scan Mode. Pressing the Peak
button will start the fast scan on the current channel being displayed and it will scan until it reaches the
hottest analyzer channel. At that time, it will continue scanning at the normal scan rate.
8. Back Light and Channel Indicator Intensity:
The Smart 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 easily be 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.
Operating The Smart Analyzer in Your Aircraft
1. Taxi:
During taxi the exhaust gas temperatures will be below the Lower Temperature Limits (1100'F). Therefore,
to avoid a red Temp Prob light, operate the Smart Analyzer in the Manual Mode. In the Manual Operating
Mode the Lower and Differential Limits are disabled.
2. Run Up:
During run up you may want to look at each of your engine temperatures by stepping the Smart Analyzer
through the channels manually. If you want the Smart Analyzer to diagnose your engine automatically, place
the Smart Analyzer in the Scan Operating Mode. A situation you may encounter by scanning during run up
is that some of the engine temperatures (such as EGTs) may not exceed their Lower Temperature Limits
(1100'F). If this is the case, you may want to check your engine in the manual operating mode.
3. Takeoff:
Place the Smart Analyzer in the Scan Operating Mode during takeoff. For the first few seconds of the
takeoff roll you may get a red Temp Prob light until the exhaust gas temperatures exceed their Lower
6
Loading...