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MTX-L

Digital Air/Fuel Ratio Gauge

User Manual

Warning!

The Oxygen Sensor used in this device gets very hot in operation.
Do not touch a hot sensor. Do not let a hot sensor touch a combustible surface.
Do not use the sensor with or near flammable liquids or gases. Failure to heed
these warnings may result in severe burns, explosions, fires, or other dangerous
events.

When installed in the exhaust, the oxygen sensor MUST be connected and
operating with the MTX-L whenever the car is running. An un-powered oxygen
sensor can be quickly damaged when exposed to hot exhaust gases.

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Содержание MTX-L

Страница 1: ...stible surface Do not use the sensor with or near flammable liquids or gases Failure to heed these warnings may result in severe burns explosions fires or other dangerous events When installed in the exhaust the oxygen sensor MUST be connected and operating with the MTX L whenever the car is running An un powered oxygen sensor can be quickly damaged when exposed to hot exhaust gases ...

Страница 2: ...ming 10 3 2 3 Customizing your fuel type 11 3 2 4 Customizing your display range 11 3 2 5 Updating the firmware 12 3 3 Logging data from your MTX L with LogWorks 12 4 Wiring Analog Outputs 12 5 Tips Tricks Troubleshooting 13 5 1 Air Fuel and Lambda 13 5 2 General measurement requirements 14 5 3 Vehicles with smog pumps 14 5 4 Single Cylinder Engines 14 5 5 Diesel Engines 14 5 6 Connecting the MTX ...

Страница 3: ...ed stand alone it has digital I O for integration with other MTS compatible products and two configurable analog outputs for integration with ECU s and 3rd party data loggers The following views will help you get familiar with the unit Needle Bar Status Light Numeric Display Mounting Bracket Serial Connectors Wiring Loom Sensor Connector ...

Страница 4: ... If either one or both of these wires are not being used isolate and tape the wire s out of the way The default analog outputs are as follows Analog output one yellow is 0V 7 35 AFR and 5V 22 39 AFR Analog output two brown is 1 1V 14 AFR and 1V 15 AFR This is a simulated narrowband signal 2 2 Mounting and Routing The MTX L gauge fits in any standard 2 1 16 52mm gauge pod Mounting of the gauge shou...

Страница 5: ...e a reading The ideal position is between 10 00 and 2 00 position On NON CATALYTIC converter vehicles You have the option with non catalytic cars to also use an exhaust clamp as described below Use of a bung is the preferred method for mounting the 02 sensor for both catalytic and non catalytic cars On TURBO CHARGED vehicles Install the bung downstream from the turbo but before the catalytic conve...

Страница 6: ...could then be blown by the exhaust stream against the hot sensor when the car is started The resulting heat shock can permanently damage the sensor 2 4 Sensor Calibration Once the unit has been wired and a suitable location has been found for both the gauge and the sensor it is time to do the sensor calibration Innovate Motorsports Direct Digital wideband measurement principal allows you to calibr...

Страница 7: ... if you power up the MTX L without a sensor connected your calibration will be reset see step 1 above 2 4 1 Calibration Schedule Normally aspirated daily driver Calibrate before installation of new sensor Calibrate new sensor again after 3 month of use Thereafter calibrate once a year or every 20 000 miles whichever comes first Turbo Application daily driver tuned rich Calibrate before installatio...

Страница 8: ...staller will automatically start follow the prompts to install the software 3 Once the software has been installed the LogWorks software LM Programmer and MTX L manual can then be located by navigating through Start Programs LogWorks3 3 2 Connecting to LM Programmer LM Programmer is used to update firmware change fuel types set display ranges and program the two analog outputs 1 Connect the OUT po...

Страница 9: ...bs The Analog output page looks like this This shows the analog output voltages versus Lambda for one of the two analog outputs The graph display is automatically scaled to the selected voltages For each output you can specify a minimum and maximum lambda value and the associated voltages Below the minimum and above the maximum lambda values the output voltages stay constant at the associated prog...

Страница 10: ...FR of 22 39 Analog Output 2 simulates a typical narrow band oxygen sensor The configuration is 1 1 V for an AFR of 14 and 1 V for an AFR of 15 Other curves of course are easily programmable 3 2 2 Advanced output programming The Advanced button allows programming to set the analog out update speed and the voltage output during sensor Warm up and Error Condition The factory defaults of the analog ou...

Страница 11: ...t fuels can be setup This setting can be found on the lower right hand corner of the Info tab in LM Programmer 3 2 4 Customizing your display range The MTX L gauge can be setup to display different ranges from both the Needle Bar and the Numeric Display There is also an option to display lambda or AFR Lastly the gauge can be setup to display percentage of Oxygen once the readings go beyond 7 lambd...

Страница 12: ...f the MTX L to the provided serial programming cable Connect the other end of the serial programming cable to your computer If your computer does not have a serial port you can purchase a USB to Serial adapter from Innovate Motorsports P N 3733 or use any USB to serial adaptor that includes drivers Make sure that nothing is connected to the IN port of the MTX L Power up the MTX L 2 Launch LM Progr...

Страница 13: ...asoline driven engines the theoretically optimal air fuel ratio for efficiency is 14 7 pounds of air for every pound of fuel At this ratio theoretically all available oxygen in the air combines with all available fuel This ratio is called the stoichiometric ratio Stoichiometric for different fuels are as follows Gasoline 14 7 LPG Propane 15 5 Methanol 6 4 Ethanol 9 0 CNG 17 2 Diesel 14 6 The measu...

Страница 14: ...3 Vehicles with smog pumps Older fuel injected vehicles with a smog pump actually inject air into the exhaust stream to aid their catalytic converter in the burn up of unburned or partially burned fuels This additional air will make the exhaust look leaner than the engine is running For an accurate measure install the MTX L sensor up stream of the outputs of the smog pump If this is not possible t...

Страница 15: ...ily in the exhaust and connect the heater wires to it to keep the EFI computer happy Be careful where you mount the stock sensor as heated sensors will get hot To connect the MTX L to the EFI computer first determine what kind of narrow band sensor is used then follow the instructions below you will need a digital multimeter to determine correct OEM sensor wires a Vehicle has a 1 wire sensor Wire ...

Страница 16: ...he Ground connection has low resistance to chassis ground less than 1 Ohm Measure while the engine is off d Vehicle has a 4 wire sensor Typically the 4 wires are heater power heater ground sensor ground and sensor element connection Proceed as for the 3 wire sensor ...

Страница 17: ...nal Serial Communication Serial Port Speed 19 2 kbit sec Packet Logging Speed 81 92 msec sample packet Sample Resolution 10 bits 0 5V at 0 1 resolution Mechanical Hole Size 2 1 16 52mm Software Supported OSs Windows 98 ME 2000 XP and Vista Temperature Max Operating Temperature 20 to 85 deg Celsius ...

Страница 18: ...y 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 product of comparable or greater speci...

Страница 19: ...ppendix C Connectors 1 Sensor Pin Use 1 IPUMP 2 SENSE PUMP 3 SHTR 4 VBAT 5 SENSE 6 SHIELD GND 7 SHTR 8 VBAT 2 Power and Analog Cable 3 Serial Out Pin Use 1 RX 2 TX 3 GND 4 GND 4 Serial In Pin Use 1 TX 2 RX 3 GND 4 MTS Sense ...

Страница 20: ...rs 2 Replace sensor Error 6 Reference cell circuit open 1 Cable connector not fully seated 2 Damaged sensor cable 3 Damaged Sensor 1 Verify Sensor is fully seated into connector make sure it clicks 2 Inspect sensor cable for rips or tears 3 Replace sensor Error 7 General System error typically a software error Software error Reboot MTX L by cycling power Reload firmware if necessary Error 8 Sensor...

Страница 21: ...MTX L_Manual doc 21 Revision History 1 0 11 18 10 Initial Release 1 1 12 17 10 Added analog output configuration Bezel gauge face installation and new screenshot for customizing the range display ...

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