● Setup - Options - ICC
"ICC" stands for "Incomplete Combustion Compensation". The activation of this option
takes into account engine characteristics which, if ignored, would reduce the accuracy of the
AFR measurement. The degree of ICC can be programmed (see Setup - Constants -
ICC_L, ICC_R on page 21). It is recommended that this option be turned off when using
fuels containing oxygen (i.e. methanol). ICC can be independently activated for each AFR
sensor.
● Setup - Options - Sound
The "SOUND" option allows the turning on or off of the "beep" that accompanies the
pressing of keys on the keypad.
● Setup - Options - Defaults
The "Defaults" option resets all setup parameters including sensor constants to default
values.
Setup - Constants Menu
The "CONSTANTS" menu is where calibration information about the sensors, fuel, air, and
engine is input into the AFRecorder (see Figure 13). Selecting "EXIT" from this menu will
return the AFRecorder to the setup menu.
SETUP - CONSTANTS
1 SENSOR_L 4 ICC_L
2 SENSOR_R 5 ICC_R
3 FUEL&AIR 6 EXIT
Figure 13: The Setup - Constants Menu
● Setup - Constants - Sensor_L, Sensor_R
The AFR sensors' calibration constants are entered after selecting "SENSOR_L" (for the left
AFR sensor) or "SENSOR_R" (for the right AFR sensor) from the setup - constants menu.
Fourteen displays following this selection allow the entry of Io
2
, Ico, Ih
2
, I
1
and I
2
values.
These constants describe the AFR sensor's sensitivity to oxygen (Io
2
), carbon monoxide
(Ico), and hydrogen (Ih
2
). These constants are factory determined and provided with every
sensor. If any AFR sensor parameter is entered (including reentering the same number), the
AFRecorder assumes that a new sensor is being used and resets the "AGE FACTOR" to 1.00
(see AFR Measurement Calibration ("AIR CAL") on page 22). The effect of this is to
negate all AFR sensor field calibration and to return the AFRecorder to the factory-delivered
AFR sensor calibration.
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