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 calibrate the sensor to compensate for sensor wear. This procedure takes just a few moments and it will ensure the most accurate readings throughout the oxygen sensor’s life. This procedure is required anytime a NEW oxygen sensor is installed. The calibration procedure requires that the oxygen sensor be in free air, this means removed from the exhaust system completely.
1. With the sensor disconnected, apply power to the MTX-L PLUS. When power is applied, all three digits will light up and the needle bar will sweep once through all LEDs. Then the status light will turn red and the numeric display will read “E2”. This is an error code, indicating that no sensor is detected. Leave unit powered on for minimum 30 seconds.
2. Power down the MTX-L PLUS and attach the oxygen sensor using the cable provided. When making these connections, make sure they are fully seated and locked. Again, make sure that the sensor is in free air (not in the exhaust).
3. Power up the MTX-L PLUS.
Again, the display should ‘sweep’, but instead of an error, the display will display “Htr”. This indicates that the sensor is being heated up to operating temperature. After 30-60 seconds, the display will switch from “Htr” to “CAL”, indicating that the sensor is being calibrated. A few seconds later, your MTX-L PLUS will begin displaying AFR. Since the sensor is in free air, the gauge will default to the upper limit of 22.4. The calibration procedure has completed and the system is now ready for use.
Important:
You can disconnect and reconnect the sensor and sensor cable for installation without losing your calibration. However, if you power up the MTX-L PLUS without a sensor connected, your calibration will be reset(see step #1 above).
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 installation of new sensor
- Calibrate new sensor again after 3 month of use
- Thereafter calibrate twice a year or every 10,000 miles, whichever comes first
Race Application
- Calibrate before first installation of new sensor
- Calibrate once per race weekend
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