If you intend
running the engine in closed loop fuel control mode, you will
need to install and configure an oxygen sensor.
From the drop-down menu, select the type of
oxygen sensor.
If you only have a serial-connected wideband
oxygen sensor and no analogue oxygen sensor, then the
analogue sensor type should be set to ‘None’.
If a serial-connected wideband oxygen sensor is
selected and connected, the AFR from it overrides the AFR
calculated from the analogue input. However if there is no
data from the serial device for a given period of time,
the value calculated from the analogue input is used
instead.
When the engine is running, the AFR readings
can be verified. There will usually be no sensible output
from an oxygen sensor when the engine is not running, and
usually no reading will be displayed on the software.