FuelTech ALCOHOL-O2 Manual De Instalación Y Especificaciones Técnicas página 10

Alcohol - O2
The free-air calibration also can be performed through FTManager Software. To
reach the calibration screen, with an open map, go to Sensors and Calibration
in the left menu, then enter Inputs and select the channels where the Alcohol
O2 analog outputs are connected.
With the sensors out of the exhaust, turn the Alcohol O2 on and wait them to
heat for at least 3 minutes. After that, enable the calibration.
This procedure must be done on both channels. With everything done, confirm
changes, save the map and write ECU.
Below is the screen where the calibration is done:
EN
For NTK sensors, free air voltage is around 3.000V. For Bosch sensors, free
air voltage is around 2,700V.
While the sensors are heating, analog output voltage is 5.000V.
Voltage differences higher than 0.100V when heating may indicate a wrong
calibration, a damaged sensor or a wiring problem, especially on the negative
(black wire) and/or power ground (black/white wire).
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