Ultimate Engine Analyzer S1004911 (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.
F All steps must be read before installing a probe. E 1. Leave slack in the cable to allow for engine movement and vibration. 2. Do Not Overtighten. Over time, tight wire wraps will cause the wire to break. S.S. Washer. Hose Clamp. 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. Male Conn. 4. The tab inside the male connector must be centered (not bent up or down) to mate properly. Check each connector before installation.
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 Must 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.
Contents Warranty ---------------------------------------------------------------------------- 2 Operating Information: ----------------------------------------------------------- 3 Introduction ------------------------------------------------------------------------------------- 3 Features ------------------------------------------------------------------------------------------ 3 Programming ------------------------------------------------------------------------------------ 6 Selecting The Proper Lim
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.
US-8A OPERATING INFORMATION OI 072491 S1004911 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.
Operating Information Features 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.
Operating Information Features 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 Leanest Cylinder will be verified. Leaning will be covered later in this manual.
Operating Information Features 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.
Operating Information Programming 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.
Operating Information Programming 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.
Operating Information Programming 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.
Operating Information Selecting the Proper Limits 4-cylinder engine would be programmed for 1-4). This would set up the first six channels to be analyzed against the Differential Limit and these channels are the only ones looked at when the Peak Button is pressed. Channels 7 and 8 may be used for any other temperature measurement without interfering with the Differential or Peak Locate features.
Operating Information Selecting the Proper Limits These limits are only a starting point. More specific information on how to select the proper temperature limits for your engine is provided below. 1. EGTs: The Exhaust Gas Temperatures are directly related to your engines ability to produce power. If any cylinder has a problem producing power (fouled plug, burned or stuck valve, broken ring, intake leak, plugged injector, timing problem, bad mag, etc.
Operating Information Selecting the Proper Limits pilot of an over-temperature condition. This is an important feature for turbo-charged aircraft since turbine inlet temperatures can easily creep above limit after a change in power or mixture settings. Another advantage of the Ultimate Analyzer over conventional gauges is its extreme accuracy and linearity. This assures you of accurate TIT readings. Turbine housing life is also affected by sudden changes in temperature.
Operating Information Selecting the Proper Limits The Cylinder Head Temperatures are related to your engines ability to produce power. If any cylinder has a problem producing power (fouled plug, burned or stuck valve, broken ring, intake leak, plugged injector, timing problem, bad mag, etc.) the CHT for that cylinder will be abnormally high or low depending on the extent of the problem. Each cylinder on your engine operates differently and has a normal operating temperature of its own.
Operating Information Selecting the Proper Limits A) Selecting the High Oil Limit: On a hot day with your engine set at 75% power, lean your engine to peak EGT. Record the Oil Temperature reading with the cowl flaps closed. Program the High Limit for 20F above the recorded reading. Some aircraft reach the highest Oil Temperature during a long full throttle climb. If this is the case for your aircraft, record the highest Oil Temperature reading during a long climb.
Operating Information Operating the Ultimate Analyzer in Your Aircraft It is not uncommon for an aircraft engine to backfire on start. This is especially true when the battery is low. If this happens and a fire starts in the carburetor, it can cause extensive damage before the problem is noticed. The Ultimate Analyzer can detect this problem almost immediately. Set the High Carb Temp Limit for 150F. This is only a recommended limit.
Operating Information Operating the Ultimate Analyzer in Your Aircraft For the Ultimate Analyzer to diagnose problems it is important the limits be set properly. The golden rule for setting the limits on the Ultimate Analyzer is No Red Light During Take-Off, Climb or Cruise. If your engine is operating properly and youre getting a red light, see Selecting the Proper Limits section of this manual. 4. Climb: Leave the Ultimate Analyzer in the scan operating mode during the entire climb.
Operating Information Operating the Ultimate Analyzer in Your Aircraft you should perform your precision leaning. Again, start leaning, only this time making very small adjustments and wait 3 to 5 seconds between adjustments. As you approach peak the exhaust gas temperature will rise much slower until it starts to decrease. When this happens you have reached peak EGT. The 1`F resolution of the digital display will be invaluable in helping you precisely detect peak EGT.
US-8A INSTALLATION INSTRUCTIONS II 072091 S1003911 Rev. A 10/4/91 You should have no trouble installing the Ultimate Analyzer in your aircraft. The instrument, probes and cables simply plug together to make hookup easy. Probe and instrument installation is standard and straightforward. The Ultimate Analyzer does not require any programming before installation. Also, it does not use any internal batteries, so once installed the US-8A does not have to be removed.
Installation Instructions 1. Important Information and Initial Check Out 6. Before starting the installation make sure the unit will fit in the location you intend to install it without obstructing the operation of any controls. 7. If this instrument is to replace an existing unit in the aircraft, it is the installer's responsibility to move or replace any existing instruments or components in accordance with FAA approved methods and procedures.
Installation Instructions 3. EGT Probe Installation 3. EGT Probe Installation: A single EGT probe should be installed in the exhaust stack of the leanest cylinder. Each engine has its own characteristics and the leanest cylinder can be different from aircraft to aircraft. As a general rule, the leanest cylinder is one of the back cylinders on a carbureted engine and one of the center cylinders on a fuel-injected engine.
Installation Instructions 5. Oil Temperature Probe Installation All Other Engines Equipped with a 5/8"-18 Oil Drain Plug Remove the 5/8" - 18 oil drain plug located on the bottom of the engine. Install E.I.s P-120 Oil Probe with a new oil seal and torque to specifications. Check for oil leaks after the first flight. 6. Carb Temp Probe Installation: Remove the threaded plug located in the carburetor housing just below the throttle valve.
Installation Instructions 8. Mark Each Extension Cable Mark each of the appropriate extension cables (on the yellow heat shrink) with the function for which it is to be used (i.e., CHT, EGT, OAT, EGT R., EGT L., etc). An ink pen or marker works well. E.I. recommends you use the left display starting with channel number 1 for your EGTs and the right display for your CHTs.
Installation Instructions 10. Route Each Extension Cable Red Slip-on Connectors A) Strip the over braid back 3 1/2". Be careful not to nick the wires. B) Shrink a piece of 1" heat shrink over the cut portion of the over braid. C) Split the two wires back 3". Be careful not to nick the wires. D) Strip each wire and double the wires over. These wires must be doubled over. E) Place a male connector on the red wire and a female connector on the yellow wire. Double crimp these connectors.
Installation Instructions 10. Route Each Extension Cable on the Female Precision Connector. Be careful not to overtighten any screws or twist the wires when installing the connector. Yellow Precision Connector Red Wire Yellow Wire Plug each probe into its associated Extension Cable. Be sure the connectors mate properly. When tie wrapping these cables down, be sure there is no strain or pull on the cable against the probe or connectors.
Installation Instructions 12. Instrument Installation Connect all the Circular Connectors to the Ultimate Analyzer in the following manner: A) Push the two mating connectors together and twist them until they snap into position. B) Turn the locking ring on the instrument connector clockwise (1 1/2 turns) until it locks into position. 13. System Ground Test: A) Turn the master switch on and look for a near ambient temperature reading on each channel.
US-8A Wiring Diagram WD 1001911 Connects to: R. Probe #1. R. Probe #2. R. Probe #3. R. Probe #4. R. Probe #5, R. Probe #6. R. Probe #7. R. Probe #8. Channel marked on ext. cable. 1 2 Connects to: 1 US-8A Back View 2 3 3 4 4 5 5 6 6 7 7 8 8 Right Extension Cable Harness. L. Probe #1. L. Probe #2. L. Probe #3. L. Probe #4. L. Probe #5. L. Probe #6. L. Probe #7. L. Probe #8. Left Extension Cable Harness. Connecting Wire Harness. Description Note: Any channel will accept any one of E.I.
US-8A Sample Wiring Diagram For Single 6-Cylinder Engine Aircraft WD 1001913 Connects to: CHT Probe #1. CHT Probe #2. CHT Probe #3. CHT Probe #4. CHT Probe #5, CHT Probe #6. Oil Temp. Probe. OAT Probe. Channel marked 1 on ext. cable. 2 Connects to: 1 US-8A Back View 2 3 3 4 4 5 5 6 6 7 7 8 8 Right Extension Cable Harness. EGT Probe #1. EGT Probe #2. EGT Probe #3. EGT Probe #4. EGT Probe #5. EGT Probe #6. Cowl Temp. used as fire alarm. Carb. Temp. Left Extension Cable Harness.
US-8A Sample Wiring Diagram For Twin 6-Cylinder Engine Aircraft WD 1001914 Connects to: R. EGT Probe #1. R. EGT Probe #2. R. EGT Probe #3. R. EGT Probe #4. R. EGT Probe #5. R. EGT Probe #6. R. CHT Probe #1. R. CHT Probe #2. Channel marked on ext. cable. 1 2 Connects to: 1 US-8A Back View 2 3 3 4 4 5 5 6 6 7 7 8 8 Right Extension Cable Harness. L. EGT Probe #1. L. EGT Probe #2. L. EGT Probe #3. L. EGT Probe #4. L. EGT Probe #5. L. EGT Probe #6. L. CHT Probe #1. L. CHT Probe #2.
TROUBLESHOOTING SUGGESTIONS T 1004911 10/4/91 Because high reliability is designed into Electronics Internationals equipment, there is no reason to put up with poor operation. We have few problems with our probes, cables and units and installation is simple. Usually fixing a problem is just a matter of inspecting the installation at a few key points. Strategy: If you have more than one problem, FIX ONE PROBLEM AT A TIME. Trying to fix all of them at once can be confusing and misleading.
TROUBLESHOOTING SUGGESTIONS C. Extension Cable Check Out: connect an ohmmeter, set to 10K range, to the open probe ends of the suspected bad Extension Cable. Set the Ultimate Analyzer to the proper channel and look for a very high (+ or -) reading. A near cabin temperature reading or no change in reading indicates an open in the cable or its connectors. Also, look for a reading on the ohmmeter around 12K ohms. Most problems of this kind are usually one of the following: 1.
SPECIFICATIONS and OPERATING FEATURES S1004911 10/4/91 Model: US-8A Weight: Unit only: 19 oz., One probe and 6 foot cable: 3.5 oz., One Probe and 20 foot cable: 7 oz. Environmental: Meets TSO C43a Power Requirements: 7.5 to 30 Volts, 1/10 Amp. Display: LCDs (viewable in direct sunlight), with 12 and 24 volt backlight control wires for night operation (channel indicators dim when your instrument panel lights are turned on).
SPECIFICATIONS and OPERATING FEATURES Differential Limit: Programmable in 1F increments from 1F to 1999F from the front panel. One limit for each display. Shock-Cooling: Programmable from 1 to 9 Seconds/F. One limit for each display. Temp Prob Warning Lights: Lights for the following conditions: A. Any channel over the High Limit. Also exhibits a high bar in the display. B. Any channel under the Low Limit (in the scan mode only). Also exhibits a low bar in the display. C.
Appendix A Adding a Channel to the US-8A If you have an unused channel and would like to add an extension cable to your instrument, perform the following steps: 1. Order an XCS Extension Cable at the proper length from Electronics International Inc. 2. Disconnect the Circular Connector from the back of the US-8A. 3. Insert the the XCS Extension Cable into the Circular Connector at the proper location (see below). Once these connectors are installed do not try to remove them without an extraction tool.
Appendix B US-8A Circular Connectors Extension Cable Harness, Back View (wire side) OR Instrument Connector, Front View 2 3 Yel 6 14 3 Red 5 Yel 10 6 Red 6 Yel 8 Yel 3 4 Red 4 Yel 5 Red 16 1 2 Red 2 Yel 7 Red 7 Yel 1 Red 1 Yel Note: 1 Red = Channel #1 Red wire. 1 Yel = Channel #1 Yel wire.
