Dynalco AF-900PC Air/Fuel Ratio Controller - Manual (Page 36)

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Min Post-Cat Comp: Sets the maximum allowable negative post-cat
compensation in millivolts. Post-cat integration will be frozen when this level is
reached. Typically set to –100.
Max Post-Cat Comp: Sets the maximum allowable positive Post-cat
compensation in millivolts. Post-cat integration will be frozen when this level is
reached. Typically set to 100.
Post-Cat Temp (F): Displays the current post-catalyst temperature value.
Pre-Cat Temp (F): Displays the current pre-catalyst temperature value.
Cat Delta Temp (F): Displays the current temperature differential across the
catalytic converter.
Filtered Delta Temp (F): Displays the temperature differential across the catalytic
converter after the time filter has been applied.
Filter Time (hours): Select the desired filter time for the FILTERED DELTA TEMP
from the drop down menu. Filter time is defined as the time required to reach 100%
of the new value when a change in delta temperature occurs. The filter is not linear.
Listed below is an example of the % new value reached at different points of the
filter time:
1/8 time ~ 37% 1/4 time ~ 60%
1/2 time ~ 85% 1 time ~ 100%
The following 4 parameters work together to establish the post-catalyst control
integration rate for pre-cat setpoint compensation when an error exists. The
association between these parameters is shown in the drawing on the configuration
screen on the following page.
Min Error (mV): Sets the minimum post-cat error voltage. No post-cat control will
occur when the error is less than this value. Set to 2.000 as a starting point.
Max Error (mV): Sets the post-catalyst error voltage for max rate post-cat
integration will begin. Set to 50.000 as a starting point.
Min Rate (mV/min): Sets the minimum post-cat integration control rate. Set to
1.000 as a starting point.
Max Rate (mV/min): Sets the maximum post-cat integration control rate. Set to
5.000 as a starting point.