The AFRecorder will abort the "AIR CAL" if the AFR sensor's output in air is unreasonable
or if its output is not steady. An aborted "AIR CAL" can be caused by a faulty sensor or an
improper calibration environment (i.e. not pure air).
AFR Measurement Enable/Disable
Selecting "ENABLE" from the main menu allows the AFR sensors to be powered down
("DISABLED") and up ("ENABLED") for sensor removal. To avoid AFR sensor damage, a
sensor should only be removed or attached when the sensors are disabled or when the
AFRecorder is off. After enabling the AFR measurement function, the AFR sensors require
40 seconds to reach operating temperature.
Stand-Alone Operation 23
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