LMA-3 Multi-sensor Auxiliary Input Device User Manual
Contents
1. Frequency straight frequency Duty Cycle External 0 5V sensors Speed sensor Custom RPM range The LMA 3 also can act as a power supply for user supplied external sensors The 5V output of the LMA 3 can supply up to 300mA of current For this functionality the LMA 1 must be connected to a switched 12V source in the car It converts the 12V to 5V to power the sensors When no external sensors need to be supplied with 5V power the 12V connection can be left open 1 1 Differential Inputs The LMA 3 s external connections are differential This means that each input channel has 2 input terminals A terminal and a terminal This is to eliminate ground offsets in the signal Many times the ground point of a sensor is at a different ground than the LMA 3 Because each electronic device can only measure a voltage referenced to it s own ground differences in grounding can introduce measurement errors The LMA 3 measures the sensor signal s ground with the input and them measures the difference between the and the input This way it recreates the sensor signal s own ground reference as if this input were referenced directly to that sensor s ground The input is NOT a ground itself It is a ground reference input 2 The Innovate Log Chain concept LogWorks 2 0 has the capability to log display and analyze up to 32 engine parameters Most users will use less though Each o2. LMA 3 Multi sensor Auxiliary Input Device User Manual Auxbox Manual_1 9 doc Ti COVGIVIGWi ith ce A AN A erat het dati A TETEA Dire Aire nl ce RA alias coulis coutabe 3 11 Differentials NPUtS ss E a a aa a aar entre detente unten Rennes rude 5 2 The Innovate Log Chain concept sien 6 2 1 Log Chain of 5 channels consisting of LMA 3 alone ceccceceeeeeeeeeeeeeeeeeeaeeeeaeeeeneeeees 7 2 2 Log Chain of 6 channels consisting of LMA 3 and LM 1 7 2 3 7 channel Log Chain example with 2 AFR channels 7 2 4 17 Channel Log Chain example iii 7 3 Connecting the MASSE nt rt en NE nd ire a a titres item seen entier GEETU E EA 8 3 1 Connecting the LMA 3 to an LM 1 is 8 3 2 Using the LMA 3 as part of a Log Cha in 0 cccceccceeeeeeeeeeeeeeeeeeeceeeeeeaeeeeneeseneeesaeeesaeeeeaes 8 3 3 Connecting external sensor signals ccceeceeeeeeeeeeeeeeaeceeeeeceaaeeeeaaeseeeeeecaeeesaeeneneeesaees 8 3 4 Powenng external Senso S errie e feet ententes tnt chvees eh entr tte steed 9 3 5 Connecting an RPM Signal re tentent ere ddr it Eba d eat 9 3 6 Connecting Type K Thermocouples cccccesceceeeeceeeeeesaeeeeeeeseaeeeeeaeseeneeseceeesaeeseaeeseaes 9 4 Mounting and calibrating the LMA 3 iii 11 4 1 Calibrating the Acceleration Sensor to the mounting position 11 5 lt Setting up the input Channels vic s scic ehenckvesscdeuts eeveches nena aia taaan a dein aaka iris 12 5 1 Prog
3. 8 characters LMA 3 The LM Programmer software then shows in its first page the type and version number of the firmware of the device 11 1 Changing the device name If multiple LMA 3 s are used in a Log Chain each MUST be given a unique name so that LogWorks can identify each LMA 3 Just enter a name in the edit box in this page 23 11 2 Updating the firmware Click on the Update Firmware button You will be presented with a file dialog box that allows you to select a firmware file Firmware files end with the file extension did LMA 3 firmware file names start with AUXB1 for AuxBox 1 The first part is followed by a dash then a V then the version number without dots Example LMA 3 firmware version 1 00 alpha release would have the file name AUXB1 V100A did LAM 3 firmware version 1 00 would have the file name AUXB1 V100 dld After you opened the firmware file this new firmware will be downloaded in the LMA 3 device 11 3 Input 1 Configuration Click on the Input 1 tab in the top of the window 11 3 1 Measuring RPM A info Input 1 input 2 input 3 Input 4 Input 5 Pilsies LM Programmer Version 3 05 Input used as Rx RPM sensing Positive pulse edge Negative pulse edge Cylinder Count fi Cyl 4 Stroke x Also for inductive clamp on 1 spark plug Non waste spark or Coil on plug The drop down list at the top of the window allows you to select
4. NATA Inductive upply p ees gt Clamp Channeh O E Calibrate gt Input Function D o 7 wi Serial INO VA j Fa Ports MOT i 3 Ho Thermo Internal Sensors couple m l RPM Input i EGT CHT 2 3 Duty Cycle s 4 Pressure To LM 1 5 ert i Sensor Power if Manifold Pressure Input Acceleration 3 1 Connecting the LMA 3 to an LM 1 Plug the supplied Mini DIN8 to Mini DIN8 cable in the LM 1 port of the LMA 3 Plug the other end of the cable into the AUX IN port of the LM 1 The LMA 3 is now operable and is powered by the LM 1 NOTE The 5V power supply for external sensors should not be used when the LMA 3 is solely powered by the LM 1 3 2 Using the LMA 3 as part of a Log Chain If the LMA 3 is the first device in the Log Chain it s Serial IN port MUST be plugged by the supplied Terminator plug The Terminator is a 2 5mm Stereo connector with no cable attached 3 3 Connecting external sensor signals For each external connection you can connect the external sensor s output to the CHx connection Connect the CHx connection to the ground of the sensor Make sure the sensor output signal does not exceed 5V The LMA 3 is protected if sensor signals exceed that up to 40V for most inputs but it cannot measure beyond a 5V signal 8 3 4 Powering external sensors If you want to power external sensors connect a switched 12V supply switched on when the cars ignition system is o
5. 4 of the LMA 3 measures vaccuum with a range of 0 30 inHg gauge This is the range intended for normally aspirated engines where the maximum intake pressure can be atmospheric pressure Function 4 of input 4 of the LMA 3 measures vaccuum and boost pressure with a range 14 7 to 29 4 PSlg This is the range intended for boosted engines where the maximum intake pressure can be up to 29 4 PSI above atmospheric pressure Vaccuum is typically measured here as negative PSI But you can set up any metric you want with LogWorks 2 8 Measuring Frequencies custom RPM or speed The LMA 3 has the capability to measure frequencies on channels 3 4 and 5 It converts a frequency signal pulses per second into a voltage 0 5V to be logged in the LM 1 or a number between 0 and 1023 to be logged directly by LogWorks This is useful for measuring custom RPM ranges signals from speed sensors or the frequency of MAF sensors with frequency output as opposed to voltage output MAF sensors The range of frequencies that the LMA 3 can measure can be programmed by with LM Programmer The LMA 3 can be set to any frequency range between 0 and 30 Hz for the full 0 5V range to 0 15 kHz for the full 0 5V output logging range Also LM Programmer has convenient conversions built in so you don t have to calculate the resulting frequency ranges for speed sensing or RPM sensing yourself See chapter 10 x for details A frequency input signal must have an amplitu
6. 6 4 Using the LMA 3 with the Inductive Clamp The inductive clamp measures the magnetic field created around a spark plug wire when spark current flows If a metallic shield covers the spark plug wire the inductive clamp may not work because the shield would short out the magnetic field Like all inductive clamp rpm pickup devices some ignition systems like Capacitive Discharge Ignition CDI or multi spark ignition systems may not work properly with the inductive clamp pickup because the pulses created may be too short in duration Multi spark systems confuse the ignition timing measurement because the RPM converter cannot distinguish which ignition pulse belongs to which crank rotation The LMA 3 will work only on the tach output of the ignition system in this case The inductive clamp must be clamped around ONE lead only Clamping it for example around all wires of a coil on plug pack does not allow it to work because the magnetic fields of the wires most likely cancel each other out 6 4 1 Inductive Clamp Usage Plug the inductive clamp s 3 5mm audio plug into the RPM socket of the LMA 3 Clamp the Inductive Clamp on the spark plug wire of one cylinder so the wire is completely surrounded by the clamp Make sure the clamp is completely closed Start the engine Switch on the LM 1 unit The decimal point of the digit display of the LMA 3 should light up steadily This indicates when a valid RPM signal is detected If it does n
7. RPM per step instead of 10 RPM when the range is 0 10230 RPM This functionality is also available for Inputs 4 and 5 11 5 2 Measuring Frequency The center section of the window changes to this 25 m Frequency measurement Full Scale Frequency must be between 10Hz and 15kHz Full Scale Frequency fU You can enter any frequency between 10 Hz and 15000 Hz as full scale frequency LMA 3 measures the frequency with a resolution of 0 1 of the full scale frequency specified So in LogWorks 0 Hz is always 0 Volt and the full scale frequency is equivalent to 5 Volt This functionality is also available for Inputs 4 and 5 11 5 3 Measuring Speed Select the Speed sensing function in the topmost drop down list The center section of the window changes to m Speed sensor setup Metric Units US Units Max Speed 100mph 1 6O0kmh gt Pulses per mile ELLE Calculate pulses per mile With the radio buttons you can select to use metric km h or US mph units In the left drop down list you select the max speed to be measured The LMA 3 measures the speed with a resolution of 0 1 of the selected max speed In the right edit box you enter the pulses per mile the speed sensor produces Speed sensors are typically pulse sensors mounted either on the drive shaft or wheel To calculate the pulses per mile or km h click on the calculate button 26 Speed Sensor Calculation x Spee
8. from the date of purchase If proof of purchase cannot be provided warranty will be determined by date of manufacture When Warranty Void This warranty shall terminate and Innovate shall have no obligation pursuant to it if i your Innovate product has been modified or repaired in a manner not previously authorized by Innovate in writing ii the identification markings on your Innovate product have been removed defaced or altered iii your Innovate product was subjected to accident abuse shipping damage or improper use iv your Innovate product was not used or configured as specified in the product manual or v your Innovate product was subjected to operating conditions more severe than those specified in the product manual Exclusions From This Warranty Oxygen Sensors are excluded from this warranty Repairs Under This Warranty In the unlikely event that your Innovate hardware product should prove defective during the warranty period contact Innovate Customer Support for a return material authorization RMA at 949 502 8400 Products returned for service must be securely packed to prevent damage and shipped charges pre paid along with proof of purchase and the return material authorization number to the Innovate repair location as instructed by Customer Service Innovate within a reasonable amount of time from its receipt of your product so shipped will ship to you at its option the repaired product or a new or reconditioned
9. means that the complete channel data set is ONLY available at the end of the log chain A datalogger capable of recording the log chain data stream therefore MUST be placed at the end of the log chain This includes lap top computers or other loggers Commands for individual devices are sent upstream A device incl a computer or an XD 1 can send commands to the devices upstream of itself but not downstream Commands can include start stop recording calibration configuration commands and so on Only the device directly upstream of the command originator of course will receive the command This device then decides depending on the command whether to execute the command and whether to pass it on An example of a case where the command is executed but not passed on is the start stop record command The first upstream device capable of logging internally will execute the command but not pass it on As said before the first device is special because it is the synchronization source for the entire chain By plugging its IN port with the supplied terminator connector a device can detect that requirement when it powers up The terminator connector just connects the transmit and receive line of the IN port together Each device sends a special command out on it s IN port when it powers up This command is ignored and not passed on by any device if received on it s OUT port If the sending device immediately receives that command on its IN port aga
10. multi cylinder 2 strokes have distributors For those that do the number of ignition pulses per crank rotation is equal to the number of cylinders Most two stroke engines have one coil for every cylinder The coil fires once for every crank revolution the same as on a 4 Stroke Waste Spark system 13 6 2 6 1 3 Rotary Engines Wankel Engine A rotary engine consists of a roughly triangle shaped rotor rotating in a roughly elliptical chamber The three spaces left between the chamber and the rotor go through the four cycles of a four stroke engine for each rotation of the rotor A single or dual spark plug at a fixed position in the chamber ignites the mixture of each space in sequence Therefore a rotary engine requires 3 sparks for every rotation of the rotor The mechanical power from the rotor is coupled to an eccentric gear to the output shaft This gear has a 3 1 gear ratio and the output shaft therefore rotates 3 times faster than the rotor The output shaft is the equivalent of the crankshaft on a piston engine Because RPMs are measured conventionally as the rotations of the crankshaft the rotary engine requires one spark for every crankshaft rotation the same as a two stroke engine How the LMA 3 determines RPM The LMA 3 measures RPM not by measuring the number of pulses over a time period as a tachometer does That measurement would be too slow to provide adequate correlation between input channels Instead the LMA 3
11. sign like this Refer to Chapter 1 for the different functions for the inputs 12 6 RPM measurement 6 1 RPM Measurement basics Most RPM measurement methods use the ignition system of the car as a convenient source of RPM dependent pulses Other methods use a TDC sensor one pulse per rotation cam sensor or fuel injection pulses number of pulses rotation is dependent on the fuel injection system Some actually measure the AC frequency created by the car s alternator Because the number of pulses per crank rotation is dependent on the ignition system and engine type a universal RPM measurement method must be adaptable to the different environments encountered The typical ignition system consists of an ignition coil a coil driver that switches current to the coil on and off and a distributor When current is switched on to the coil the coil stores energy in its magnetic field When the current is switched off that energy gets discharged at a very high voltage pulse on the coil s secondary winding creating a spark A capacitive discharge ignition system CDI uses a capacitor to store the spark energy The capacitor is charged to about 400V and then rapidly discharged over the ignition coil s primary winding The coil thus only acts as transformer and does not store energy and can therefore be smaller The advantage of a CDI system is a very high and fast rising spark voltage less susceptible to spark fouling The weakness
12. the different functionality for that input If RPM is selected the area below the functionality selection shows as above Select the cylinder count in the appropriate drop down list 24 11 4 Input 2 Configuration Function 1 and 2 of Input 2 use the TK and TK inputs The CH2 and CH2 inputs are used ONLY of this input is set for external 0 5V sensor When selecting one of the side force modes for Input 2 the center window looks like this m Side Force Sensor Travel Direction Build in direction G C relative to travel direction e Ea e Select the travel direction of the car Please note that changing this setting will effect the travel direction setting for acceleration measurements on Input 5 as well 11 5 Input 3 configuration Input 3 has by default duty cycle measurement as function 1 See chapter 10 for details Duty Cycle measurement is also available on Inputs 4 and 5 11 5 1 Measuring Custom RPM When using the custom RPM feature the center area looks like this RPM sensing Positive pulse edge C Negative pulse edge Custom Max RPM Cylinder Count 6000 fi Cyl 4 Stroke Also for inductive clamp on 1 spark plug Non waste spark or Coil on plug On the left edit box you can specify the max RPM for this measurement channel In the example case the max RPM is 6000 This means that in LogWorks 6000 RPM is equivalent to 5Volt This allows LogWorks to have a higher RPM resolution 6
13. a channel to factory Calibration 0 eceeeeceeeeeeeeceeeeeeeeteeeeeseaeeeeaaeeennees 21 11 Programming the LMA 3 with LM Programmer 23 11 1 Changing the device name ss 23 11 2 Updating the firmware fasses utero nn terme detre ane t age 24 11 3 Input T Configuration stresse aaa aaaea ara aa aE aa dent dites sde 24 That Measuring RPM cest tin td menti En ERE Ke OEA EBER E 24 11 4 INPUT 2 Configuratio Mies rentre aaa aaraa aa data ete aa aa aED messes 25 11 5 Inputs CONTIGQUPATION teisstcctasceeed sites ein is res lire res nn a ed rer lutins 25 145 1 Measuring Custom RPM Aai fenetres ten durement tenees Me 25 11 5 2 Measuring Frequency rene creme in tie etes titine deu He 25 11 5 3 Measuring Speed sssssssrtssssstessnsenenememmanmenneenneanseslensenemennnelessanenenegmntansse 26 11 6 INPUT CONTIQUPATION ss sense aaa a Eaa ate ut a bande relier deleted 27 11 7 INPUT 5 COMPQUIATION Eee ee saut arr ent diet eus ruse 27 12 Kit Gontents z asshiedirshns aliens detre On Mr teur tte E tet NAS 28 Appendix A Limited Warranty ss tisse nine siemens tee ninenteale sl 29 13 REVISION HISTOr VE utero tes EE statuettes men rente rabat eut ave tte 30 1 Overview The LMA 3 also called the AuxBox was originally designed as a peripheral for the LM 1 digital Lambda meter The LM 1 has 5 auxiliary inputs The LMA 3 populates these inputs with either built in sensors or user connectable external sensors The LMA 3 may also be used as a st
14. and alone 5 channel MTS compatible input device see Chapter 2 for more details a Be Each of the five inputs of the LMA 3 can be user configured for different functionalities The 7 segment display of the LMA 3 Function indicator will show which functionality is selected The following tables show the functionality of each of the 5 inputs of the LMA 3 Input 1 Functions Function 1 2 Indicator Functionality RPM RPM External 0 5V 0 10230 0 20460 sensors Input 2 Functions Function 1 2 3 4 5 Indicator Functionality Thermocouple Thermocouple Side Side Side External 0 5V EGT range CHT range Force Force Force sensors 0 1093 degC 0 300 degC 2g 19 0 259 32 1999 degF 32 572 degF Input 3 Functions Function 1 2 F Indicator Functionality Duty Cycle N A Frequency External 0 5V straight sensors frequency Speed sensor Custom RPM range Input 4 Functions Function 1 2 3 4 F d Indicator Functionality MAP 1 MAP 3 Vaccuum Vaccum Boost Frequency Duty External bar bar 0 30 14 7PSl straight Cycle 0 5V 0 101 3 0 304 1 inHg 29 4 PSI frequency sensors kPa kPa Vacc Speed sensor Custom RPM range Input 5 Functions Function Indicator 1 2 3 F d Functionality Acceleration 2g Acceleration 19 Acceleration 0 25g
15. anged to reflect functionality of firmware 1 1 1 5 8 22 2005 Changes Added 3 button Accel reset to 4 1 needs graphic Changed 8 1 check graphic Min freq 30Hz 9 0 1 6 1 8 2006 Changes Intro text 1 0 Added Accel graphic to 4 1 fixed paragraph spacing 8 0 added new 11 on external input and calibration 1 7 1 8 2006 Changes VR Sensor info typographical errors extra ignition info 1 8 9 14 07 Added Kit Contents section 1 9 12 01 08 Removed unsupported functions 30
16. d sensor setup wheel sensor Driveshaft sensor Pulses per rotation 1 120 fi Tire diameter 25 00 Inch Final drive ratio Select if you use a drive shaft sensor or a wheel sensor Enter the pulses per rotation created by the sensor either as driveshaft rotation or wheel rotation You also need to enter the wheel diameter and in case of a drive shaft sensor the final drive differential ratio The LM Programmer will calculate the pulses per mile km for you This functionality is also available for Inputs 4 and 5 11 6 Input 4 configuration Function 1 2 3 and 4 on this input are used for pressure measurement 11 7 Input 5 Configuration For Custom Frequency Custom RPM speed sensing and duty cycle inputs on Input 5 see chapter 12 5 When selecting one of the acceleration measurement modes for Input 5 the center of the window changes to this Acceleration sensor Travel Direction Build in direction Cy C relative to travel direction e 1 e Select the travel direction of the car Please note that changing this setting will effect the travel direction setting for side force measurements on Input 2 as well 27 12Kit Contents AuxBox P N 3742 28 Appendix A Limited Warranty LIMITED WARRANTY Innovate stands behind the quality of its products Innovate makes the following warranty to purchasers of its products All new Innovate products carry a six month warranty
17. de voltage range of pulse between 0 5V at the low pulse point to minimum of 3V and maximum of 40 V at the high pulse range NOTE The custom RPM feature will work only for even fire tach signals not for tach signals that vary their time between pulses during an engine cycle Use the input 1 RPM functions instead 9 Measuring duty cycle To measure the duty cycle of a signal in channels 3 4 and 5 the input signal must cover the same voltage range as for a frequency signal Duty cycle is defined as the ratio between the time a signal is active and the total time of the active and inactive time A signal can be either active high the event like injector open happens when there is a high voltage or active low the event happes when the measured signal is at ground or close to it Very often the injector duty cycle is to be measured by the LMA 3 A typical fuel injector is connected to 12V on one side while the other side is connected to ground when the ECU opens 18 the injector Because the pulse is therefore active when the voltage on the pin is at ground negative duty cycle is measured So called peak hold injectors as opposed to saturated injectors work differently Their drive signal first goes to ground for a high current opening pulse then rises to 8 10 Volts for the hold period Because the LMA 3 sees everything above 2 5V as high it will be able to see only the peak period On some peak hold systems it is possib
18. e LMA 3 shows the blinking E even when the device is calibrated on a flat horizontal surface the device may need to be reset To reset the LMA 3 s accelerometers place the device on a flat horizontal surface and press and hold all three buttons together until the display shows the letter A M After this re try the above calibration procedure You can now mount the LMA 3 11 5 Setting up the input channels The LMA 3 can be programmed directly through the setup buttons on the LMA 3 LM Programmer software version 3 05 or later allows you to program the LMA 3 via the LM Programmer software This is necessary for some of the more advanced functionality of the LMA 3 Some of these advanced functions like speed sensing frequency sensing custom RPM and so on require more user input data that cannot be supplied by the simple 3 button interface of the LMA 3 5 1 Programming the LMA 3 with the setup buttons To program an input channel repeatedly press the Channel button until the channel number to program appears on the LMA 3 digit display Then repeatedly press the Function button until the digit display shows the intended function The digit display will switch rapidly between indicating the input channel number and the set function The LEDs next to the channel and function buttons will indicate which value is being displayed If the function selected is External input the digit display shows a
19. e thermocouple wire Twist the two exposed metal ends together You may optionally solder them also But twist them first Do not solder them in parallel This will form what is called the Hot junction This Hot junction is what you will connect to the surface that you want to measure This is usually either a under the copper gasket of a sparkplug for cylinder head temperature CHT or b clamped to a primary header tube for exhaust gas temperature EGT There is also the Cold junction This is where the 2 leads of the thermocouple come together again at the LMA 3 terminals The LMA 3 has an internal temperature sensor at the T C input terminals It uses this sensor to offset the effect of the Cold junction in the measurement This is called Cold junction compensation Once the effects of the cold junction are neutralized the LMA 3 can accurately read the temperature of the Hot junction which is the twisted lead pair at the opposite end of the thermocouple wire One thing that is counter intuitive for many people is that the negative side of a thermocouple wire is always red There are many different types of thermocouple wire types K J and T being the most popular All have a red negative lead and a yellow black or blue positive lead respectively When connection the thermocouple to the TC terminals on the LMA 3 be sure to connect the yellow lead to the and red lead to the terminals Several manufacturers offer EGT ther
20. f the MTS components reads between 1 and 6 engine parameters To interface a multitude of MTS components to LogWorks with a single connection the Innovate LogChain concept was introduced The LMA 3 can be used as a MTS component in a Log Chain Each of the MTS components has two serial ports except the LM 1 which has only one One serial port is designated as IN port the other as OUT port The OUT port of one device is connected to the IN port of the next device and so on This way devices can be daisy chained to build a log chain for up to 32 channels total The OUT port of the last device is connected to the computer for logging or downloading of logged data The device that s first in the chain is special It determines the logging sample rate The first device in the chain sends a data packet containing its channel data a sample to the next device downstream left to right in the diagram every 81 92 milliseconds The next device appends its data to that packet and hands that packet to the next device downstream and so on At each device the packet grows in length The devices in the chain synchronize their sampling of the engine parameters to the packets so that all the channels in a packet together represent the same instance in time At the downstream end of the log chain OUT port of the last device a computer or external logger can be connected to store or display the stream data The XD 1 display is such a device This also
21. from the input of the channel to be restored to the GND connection on the LMA 3 21 e Press the Channel button until the channel number to be calibrated is displayed e Press and hold the Calibrate button while the channel number is still displayed The LMA 3 will either display a lower case d to indicate the defaults have been restored for the selected channel or an upper case E to indicate that the restoration could not occur Normally an E indicates that more than 1V is being detected on the selected input 22 11 Programming the LMA 3 with LM Programmer To connect the LMA 3 for programming follow these steps 1 Insert the terminator plug included 2 5 mm stereo connector without wire into the Serial IN port Make sure it is seated fully 2 Connect the 2 5mm to DB 2 computer interface cable into the Serial OUT port Your computer needs a serial port If it does not have one you will need a USB to serial adapter 3 Power the LMA 3 either from 12V a 9V battery or by connecting it to an LM 1 as described in chapter 3 1 4 Start the LM Programmer application The following screen will show up LM Programmer Version 3 05 o xj info input 1 input 2 Input 3 Input 4 Input 5 2003 2004 Innovate Technology Inc NNOVATE 5 MOTORSPORT Ss Device Type LMA 3 Firmware Version 1 10e Connected to port COM 1 Processor Version ATM162 16 Please give this device a unique name Max
22. in because the terminator is plugged in it assumes it is the first and special device in the chain The LM 1 having only one serial port is ALWAYS a special device and MUST be connected to the beginning of the chain The following are some examples of Log Chains using the LMA 3 and other MTS devices 2 1 Log Chain of 5 channels consisting of LMA 3 alone To Wa Computer Terminator Plug Arnold LMA 2 2 Log Chain of 6 channels consisting of LMA 3 and LM 1 To Computer This allows to record LMA 3 data in the LM 1 2 3 7 channel Log Chain example with 2 AFR channels To Computer Terminator Plug Arnold LE CJ LMA KD F OI Notice that the LC 1 s are connected BEFORE the first LMA 3 LC 1 s should always be connected before the first LMA 3 2 4 17 Channel Log Chain example The example chain consists of a LM 1 LMA 2 a LC 1 two LMA 3 s and 2 XD 1 s In this case the chain has 17 channels 6 from LM 1 1 from LC 1 and 5 each from the two LMA 3 s To Computer OUT LCI LMA 3 LMA 3 XDF AD T Devices attached to the LM 1 s analog input count as being part of the LM 1 s 6 channels They don t count extra XD 1 s do not contribute any channels so you can add as many as needed 7 2 3 Connecting the LMA 3 The LMA 3 looks like this Accelerometer Calibration Function Channel gt and APM Cylinder select select select LMA 3 MULTI SENSOR AUXILIARY INPUT DEVICE La
23. le to connect the CHx input of the LMA 3 to 12V at the injector and connect the CHx input to the injector signal to still measure correctly But that is not always the case The LogWorks 2 0 Manual shows an alternative method If the above method works it actually measures positive duty cycle 19 10 Measuring external 5V sensors Each of the 5 channels on the LMA 3 can be configured to accept input from an external 0 5V sensor Hookup is very straight forward with ground going to the input for the channel and the positive sensor signal going to the input for the channel Raw sensor data can be converted into meaningful units and values using the input configuration features of LogWorks on a PC 10 1 Calibrating external 5V inputs LMA 3 external inputs are factory calibrated However depending on a number of factors it is not unusual to see a small discrepancy between values read on an external voltmeter and those read by LogWorks from an LMA 3 If higher precision is required the LMA 3 can be field calibrated The following calibration instructions all assume that the input being calibrated has already been configured for external input Either using LM Programmer or the front panel interface 10 1 1 Calibrate using built in sensor power In order to calibrate using the built in sensor power the following steps must be taken e Connect the LMA 3 to external 12V power e Connect a jumper wire between the 5V sensor outpu
24. measures the time between input pulses and from that calculates RPM for each pulse measurement This measurement method has a few caveats though 1 Ifthe RPM pulse signal is derived from the ignition signal a multi spark ignition system will trigger the measurement multiple times for each pulse This throws the measurement off because the LMA 3 does not know if the pulses are for each ignition event one per cylinder cycle or because of multispark This is specially problematic because the number of multispark pulses also varies with RPM in a lot of ignition systems Fortunately many multispark ignition systems output a tach signal with only one pulse per engine cycle But some notably Ford EDIS systems output all pulses and therefore require a special tach adapter 2 Odd fire engines like V Twin motorcycle engines and odd fire V6 engines have ignition pulses that are not evenly spaced For example a 60 degree V Twin running at 10 degrees ignition advance will fire cyl 1 at 10 degrees BTDC Then fire cyl Two 420 degrees later at 410 degrees Then fire cyl 1 300 degrees later at 710 degrees This means the ignition pulses sent to the LMA 3 are alternating between 420 and 300 degrees apart and therefore the time between pulses alternates The LMA 3 therefore measures the times between ALL pulses for a complete engine cycle 2 rotations and averages the times between them 14 6 3 Programming the RPM input Determine the number of igni
25. mocouple probes which are actually inserted into the exhaust gas stream through a hole in the headers or exhaust manifold These provide a more accurate measurement of exhaust gas temperature They are commonly available in types K and J Only type K will currently work with the LMA 3 To use a thermocouple probe connect the red and yellow leads of the thermocouple wire to the yellow and red leads of the thermocouple probe The junction is inside the probe You can not use normal copper wire to eG connect the thermocouple probe to the LMA 3 You must use thermocouple wire to connect the probe If you do not there will be an extra two metal junction where the Copper wire meets the Constantan wire of the probe This extra junction will cause a large error in the temperature readings Most Thermocouple probes are of the grounded junction type This means that the hot junction is also connected to the probe s body As this body is connected for example to the exhaust manifold the sensor wires are essentially grounded through that The same is true if a home made thermocouple junction is used as described above by twisting the wires and if that wire twist is connected to some grounded engine part You can check if you have a grounded junction type by measuring between the probe body and one of the Thermocouple wires If you have continuity you have a grounded junction The LMA 3 NEEDs a grounded junction If you don t have a gro
26. n to the connection marked 12V on the left side Connect the connection marked GND to the cars chassis ground At the connection marked 5V you can connect external sensors External sensors don t HAVE to be powered by the LMA 3 The 5V output is a convenience for external sensors when no 5V supply is available The 5V supply can power sensors with a total power consumption of up to 300mA 3 5 Connecting an RPM signal For RPM measurement you can either connect a tach signal to the CH1 input or plug an inductive clamp into the 3 5 mm stereo socket marked RPM See chapter 6 for RPM measurement details 3 6 Connecting Type K Thermocouples Thermocouples are used to measure temperatures by relying on the phenomena where a junction of any two different metals Copper and Iron for example will generate a small voltage This voltage is dependant upon which two metal are used and the temperature of the junction This phenomena is known formally as the Seebeck Effect Because every junction of different metals contributes its own voltage into the measurement it is important to have as few junctions between dissimilar metals as possible in order to record an accurate measurement This is why thermocouple wire is made completely of two different metals A Type K thermocouple is composed of Cromel and Alumel one lead being made of each the red and yellow leads To make a thermocouple strip approximately 3 4 of insulation form one end of th
27. of the CDI system is the very short duration spark which might not be long enough to ignite the mixture Multispark ignition systems try to overcome the inherent weakness by creating multiple spark pulses over some degrees of crank rotation to increase the likelihood of igniting the mixture The distributor switches the spark voltage to the appropriate spark plug 6 1 1 Four Stroke Engines On a typical 4 stroke engine each spark plug fires once for every two crank rotations The coil on a distributor equipped 4 stroke has to create sparks for every cylinder The number of ignition pulses per crank rotation in this case is the number of cylinders divided by 2 Some engines have one coil for every 2 cylinders instead of a distributor The coil fires two spark plugs at the same time One spark is wasted because it fires one cylinder at the end of its exhaust stroke Therefore this system is called a Waste Spark System Each coil of a Waste Spark System fires once for every crank revolution Other distributor less 4 stroke engines use one ignition coil for every spark plug This ignition system fires each coil once for every 2 crank revolutions Coil on Plug ignition systems actually incorporate the ignition coil in a module that plugs directly onto a spark plug and do not have a spark plug wire 6 1 2 Two Stroke Engines On a 2 stroke engine there is a spark for every crank rotation so the spark frequency doubles compared to a 4 stroke Very few
28. ot light up or lights up intermittently reposition or reverse the clamp try clamping it upside down If the decimal point out only occasionally that is OK The RPM converter will still convert though its output might be noisy A noisy output has spikes or lengthy flat areas in the data log Note to work properly with the inductive clamp pickup the LMA 3 must be set up for the appropriate number of pulses per crank rotation e For a 4 stroke engine without waste spark ignition this would be 1 pulse per 2 crank rotations This is the factory setting e For a4 stroke engine with waste spark ignition or a 2 stroke engine this would be 1 pulse per crank rotation e For a rotary engine this would be 1 pulse per rotation This is the same as for a 1 cyl 2 stroke motor Note On any distributor less ignition system you can alternately clamp the inductive clamp around one of the power wires on the primary side of the ignition coil or coil on plug module 16 6 5 Using the RPM Converter with pulsed RPM input Tach signals Unplug the inductive clamp from the LMA 3 if connected Connect the RPM signal to the CH1 input screw terminal The decimal point of the digit display of the LMA 3 should light up steadily This indicates when a valid rpm signal is detected If it does not light up check your connections DO NOT CONNECT A PULSED RPM SIGNAL TO THE INDUCTIVE CLAMP INPUT THIS MIGHT DAMAGE THE LMA 3 OR LM 1 7 Measuring P
29. product of comparable or greater specified functionality All repaired or replacement products shall be warranted for the remainder of the original product warranty Disclaimer INNOVATE MAKES NO OTHER EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO YOUR INNOVATE PRODUCT OTHER THAN THE LIMITED WARRANTY SET FORTH ABOVE No Innovate dealer agent or employee is authorized to make any modification extension or addition to this warranty unless enforceable or unlawful under applicable law INNOVATE DISCLAIMS ALL IMPLIED WARRANTIES INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY NONINFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE AND THE LIABILITY OF INNOVATE IF ANY FOR DAMAGES RELATING TO ANY ALLEGEDLY DEFECTIVE PRODUCT SHALL UNDER ANY TORT CONTRACT OR OTHER LEGAL THEORY BE LIMITED TO THE ACTUAL PRICE PAID FOR SUCH PRODUCT AND SHALL IN NO EVENT INCLUDE INCIDENTAL CONSEQUENTIAL SPECIAL OR INDIRECT DAMAGES OF ANY KIND EVEN IF INNOVATE IS AWARE OF THE POSSIBILITY OF SUCH DAMAGES Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages so the above limitations or exclusions may not apply to you 29 13 Revision History 1 0 8 23 04 Initial release 1 1 8 31 04 Corrected miscellaneous typographical errors 1 2 9 1 04 Corrected table 1 and section 6 1 3 9 20 04 Corrected miscellaneous typographical errors 1 4 8 19 2005 Ch
30. ramming the LMA 3 with the setup buttons 12 6 RPM m easur ment sitis Geeks minette TE E E tire mere M 13 6 1 RPM Measurement Dasies sisri Te ekkr eeek TEESE SEEREN destin mener se EE E KAES ete ds AE AENA Saen 13 6 1 1 Four Stroke ENgGin S e aa aa aaa nent at aE aa apie nel baaa ent 13 6 1 2 TWo StrokKe Engines Hassan inner e a anaana Eaa iaaa a 13 6 1 3 Rotary Engines Wankel Engine ss 14 6 2 Howthe LMA 3 determines RPM iii 14 6 3 Programming the RPM input sise 15 6 4 Using the LMA 3 with the Inductive Clamp 16 6 4 1 INndUCTIVE Clamp USAGe esecce relate diet eee ti ent at 16 6 5 Using the RPM Converter with pulsed RPM input Tach signals 00easseeeneeeeeeen 17 7 NIGASUTING PFESSUIES sise tenir sert den ele s EAEN AEE nt deteste anis 17 bel Measuring MAP nsetti tnt ere rte re nada eee Martine etes cire dass 17 Te Measuring DOOSUVACCUIM ire esan eKA ESA SOKE osa AARE AENEA GUNEEN AEI SEREA ESENE beg 17 8 Measuring Frequencies custom RPM or speed 18 9 Measuringcauty CyCo aeie kerap eka saik Raa en AE SEGNEN ti etats ste de etage Re ds set tente nus 18 10 Measuring external 5V sensors ue 20 10 1 Calibrating external 5V inputs su 20 10 1 1 Calibrate using built in sensor power eee eee eeeeeeeeeeeeeeeeeeeaeeeeaeeseeaeeeeaaeeesaaeeenees 20 10 1 2 Calibrate using external sensor power cceeeeeeeeeeeeeceeeeeeaeeeeaeeteeeeeecaaeeeeaaesennees 20 10 1 3 Restoring
31. ressures The LMA 3 has a built in MAP sensor To use it connect a small 1 4 hose between a vacuum boost connection AFTER the throttle body and the LMA 3 MAP input port It should be connected after the throttle body because the lowest pressure that can be measured before the throttle body is atmospheric pressure discounting some pressure losses from the intake tract before the throttle body MAP stands for Manifold Absolute Pressure This means that the sensor measures pressure referenced to absolute vacuum not atmospheric pressure like many vacuum and boost gauges Engine parameters like fueling ignition timing compressor efficiency and so on are dependent on the MASS of air in pounds per cubic foot or kg per cubic meter entering the engine As air is a gas it s mass is dependent on its ABSOLUTE pressure referenced to absolute vaccuum and it s temperature Most vaccuum and boost gauges are gauge pressure sensors A gauge pressure sensor measures the difference to atmospheric pressure not the absolute pressure So without knowing atmospheric pressure at the point where the sensor gets it from the actual air mass entering the engine can t be measured Because the atmospheric pressure changes with altitude and weather the gauge pressures are not a precise metric This is specially problematic for boost pressure sensors because their atmospheric reference source comes typically from inside the cabin or engine compartment The atmo
32. spheric pressure there can change with speed from aerodynamic effects ram pressure 7 1 Measuring MAP Function 1 of input 4 of the LMA 3 measures absolute pressure with a range of 0 1 bar 0 14 7 PSla This is the range intended for normally aspirated engines where the maximum intake pressure can be atmospheric pressure Function 2 of input 4 of the LMA 3 measures absolute pressure with a range of 0 3 bar 0 44 1 PSla This is the range intended for boosted engines where the maximum intake pressure can be up to 29 4 PSI above atmospheric pressure 7 2 Measuring boost vaccum The LMA 3 can use it s MAP sensor also as gauge pressure sensor if so desired As stated above this is NOT the preferred way of measuring pressures but it is possible The LMA 3 will measure the current atmospheric pressure in the intake tract when it starts up and stores this 17e value internally until it is started the next time In vaccuum boost measurement mode the LMA 3 will then subtract the measured value from the MAP value internally For this to work the LMA 3 MUST be powered by a switched 12V source that switches on before the engine is started like the ignition power This 12V source MUST stay active during cranking To give the LMA 3 a chance to measure atmospheric pressure you must change the way you start the engine First switch ignition on powering the LMA 3 wait for 0 5 seconds THEN crank the engine starter Function 3 of input
33. t and the terminal for the input to be calibrated e Press the Channel button until the channel number to be calibrated is displayed e Press and hold the Calibrate button while the channel number is still displayed The LMA 3 will either display a lower case c to indicate the Calibration has occurred for the selected channel or an upper case E to indicate that the calibration could not occur Normally an E indicates that the voltage being input is 1V or more off from 5V 10 1 2 Calibrate using external sensor power In order to calibrate using external sensor power the following steps must be taken 20 e Connect the ground from the external sensor supply to the GND connection on the LMA 3 e Connect the 5V from the external sensor supply to the input of the channel to be calibrated e Press the Channel button until the channel number to be calibrated is displayed e Press and hold the Calibrate button while the channel number is still displayed The LMA 3 will either display a lower case c to indicate the Calibration has occurred for the selected channel or an upper case E to indicate that the calibration could not occur Normally an E indicates that the voltage being input is 1V or more off from 5V 10 1 3 Restoring a channel to factory calibration In order to restore an external input back to the factory default calibration the following steps must be taken e Connect a jumper wire
34. tion pulses per crank rotation Refer to Table 2 or 3 for guidance Press the Channel button until it shows channel 1 Press the Function button until it shows 1 or 2 Use 1 if your engine s redline is below 10000 RPM Otherwise use 2 Press the Calibrate button until the selected Cyl Number apears Table 2 Cylinder number and RPM calibrate number 4 Cyl engine Number 4 Stroke Calibrate Comment of pulses Crank Number Cylinders Rotation 1 1 2 1 Use also when using inductive clamp on spark wire or power wire of COP system of 1 cylinder only for all cylinder numbers 2 1 2 Use also when using inductive clamp on spark wire or power wire of Waste spark coil of 1 cylinder only Waste spark system 1 coil for every 2 cylinders 3 1 1 2 3 4 2 4 5 2 1 2 5 6 3 6 8 4 8 10 10 A 12 12 C Table 3 Cylinder number and RPM calibrate number 2 Cycle and Rotary Engine Number 2 Stroke Calibrate Comment of pulses Crank Number Cylinders Rotation 1 1 2 Use also when using inductive clamp on spark wire or power wire of COP system of 1 cylinder only for all cylinder numbers Also use for rotary engine 2 2 4 Use also when using inductive clamp on spark wire or power wire of Waste spark coil of 1 cylinder only Waste spark system 1 coil for every 2 cylinders 3 3 6 4 4 8 5 5 A 6 6 C 15
35. unded junction connect a wire between the TC input of the LMA 3 and the ground terminal of the LMA 3 10 4 Mounting and calibrating the LMA 3 In order to use the acceleration sensor of the LMA 3 care must be taken to mount the LMA 3 correctly on a horizontal surface in the car The LMA 3 MUST be aligned with the direction of travel The following pictures show the four possible mounting positions Direction of Travel Direction of Travel Direction of Travel Direction of Travel t f external Connector a og rc c ox LMA 3 Qe a Te I T z fall a amp I LMA 3 external Connector The mounting position should not deviate more than 3 degrees from horizontal 4 1 Calibrating the Acceleration Sensor to the mounting position Lay the LMA 3 down on the mounting surface but don t mount it yet Switch the LM 1 on to power the LMA 3 or switch the 12V supply to the LMA 3 on if it is powered from a switched 12V supply rr Press the Calibrate button until the digit display shows a blinking C Ln If the mounting surface is not within the 3 degrees of horizontal the acceleration sensor can t be calibrated for zero g and the LMA 3 shows a blinking E for Error E After the zero g acceleration calibration is performed hold the LMA 3 such that the side of the LMA 3 pointing in the intended direction of travel points vertically up Then press the Calibrate button again until the blinking C shows up If th
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