Auto Meter 4378 - Manual (Page 4)

Stoichiometric AfR Setting mode:
The Stoichiometric AFR setting allows you to adjust the gauge scale for alternate fuel types such as Ethanol. As a default this product is set up
for gasoline, with a stoichiometric AFR point of 14.7:1. If you would like to adjust this product for use on an alternate fuel type or would merely
like to adjust the “center” point of your BGD, please follow the instructions below.
To view your current Stoichiometric AFR setting:
From Real-Time Mode, press mODE (-) to scroll until the display indicates “AFr”, then press SELECT (+) to display your current
Stoichiometric set point.
If neither button is pressed for 3 seconds after the Alarm Point Setting is displayed, the gauge will return to Real-Time Mode.
To Change your Stoichiometric AFR setting:
When the current Stoichiometric set point is displayed, press SELECT (+) to increase your Stoichiometric AFR setting, and mODE (-) to
decrease your Stoichiometric AFR setting.
After you have selected your new Stoichiometric set point, the gauge will flash your new set point 5 times on the display and then the
SSD will display “S C” for Save/Cancel.
To confirm your new Stoichiometric setting, press
mODE (-). This will save your Stoichiometric set point changes
and return the gauge to Real-Time mode.
To cancel the changes and return to your previous set point, press SELECT (+). This will cancel the Stoichiometric set point changes
and return the gauge to Real-Time mode.
BGD Range Setting mode:
The Bar Graph Display (BGD) Range Setting Mode allows you to fine tune the resolution of this instrument for your specific application.
With upper and lower set point adjustability, you can set the BGD to utilize the exact range that the engine / vehicle operates within and
see exactly how rich or lean you are running in relation to your current set up and tune. Adjusting your BGD limits also adjusts the scaling
of the 0-4v data logger output supplied from the gauge. The selected low set point of the BGD Range becomes the 0v value of the data
logger output. The selected high set point of the BGD Range becomes the 4v value of the data logger output. Whenever you change these
points, the instrument adjusts the data logger output so that the 0-4v signal is always linear between your chosen set points.
To view your current BGD Range HI / Lean setting or LO / Rich setting:
From Real-Time Mode, press mODE (-) to scroll until the display indicates “dSP”, then press SELECT (+) to display your current
BGD Range set point.
The SSD of your display will show “HI” in the display to indicate that you will be viewing the “above Stoichiometric” or
“Lean”upper range boundary.
If you would like to view the LO / Rich setting, press
mODE (-) when “HI” is shown on the SSD. The SSD should
now indicate “LO”.
When the desired setting, “HI” or “LO”, is displayed, confirm this selection by pressing
SELECT (+). The upper or lower BGD range
value will then be displayed in the SSD of your gauge corresponding to your selection.
Note: When your selection is made and the numeric range value is shown, LEDs in the BGD will light to indicate which set point
you are viewing. If the LEDs to the left of center or Stoichiometric are lit, you are viewing the “LO” or Rich set point. If the LEDs
to the right of center or Stoichiometric are lit, you are viewing the “HI” or Lean set point.
If neither button is pressed for 3 seconds after the BGD Range “HI” Setting is displayed, the gauge will return to Real-Time Mode.
To Change your BGD Range setting:
When the current BGD Range “HI” or “LO” set point is displayed, press SELECT (+) to increase your chosen BGD Range setting,
and mODE (-) to decrease your BGD Range setting.
After you have selected your new BGD Range set point, the gauge will flash your new set point 5 times on the display and then the
SSD will display “S C” for Save/Cancel.
To confirm your new BGD Range setting, press
mODE (-). This will save your BGD Range set point changes
and return the gauge to Real-Time mode.
To cancel the changes and return to your previous set point, press
SELECT (+). This will cancel the BGD Range set point changes
and return the gauge to Real-Time mode.