Operation; Calibration; Resistor Trim Calibration Mode (Rcal); Free Air Calibration Mode (Acal) - AEM 30-0300 Instruction Manual

X-series uego gauge bosch lsu4.9

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Operation

Mode (MODE) and select (SEL) buttons are located on the face of the gauge for configuration; refer to the diagram below

for the available options and their function. Note that the faceplate is two-sided and reversible. If the display mode is

changed to lambda, the faceplate may be flipped to display the corresponding lambda scaling. Please reference the

Faceplate/Bezel Installation section in this manual for instruction on this process. The oxygen percentage display mode

may be selected but the outer "needle" LEDs will be non-functional and, thus, there is no corresponding faceplate for this

mode. The center display will indicate the current sensor reading numerically or four dashes "----" if the current mixture is

full lean (> 20:1 AFR).

The supplied UEGO sensor is factory calibrated via a trim resistor, integral to the sensor connector, and requires no

further calibration. The ability to perform a free air calibration is provided for users that wish to do so. A free air calibration

can be used as a sensor ages, however, new sensors should use the resistor calibration for best accuracy.

This is the X-Series UEGO controller's default mode as shipped from the factory. It is the recommended calibration mode

and, for most users, no further action or calibration is required.

Refer to the Operation section of this manual for instruction on how to navigate to the menu selection ACAL. The sensor

MUST be removed from the exhaust for this procedure. The free air calibration process begins once the ACAL menu

option selection is confirmed. The calibration will take approximately ten to fifteen seconds during which the sensor must

be placed in a "fresh" air environment, i.e. an area without lingering exhaust or chemical fumes.

complete and the gauge will report PASS or FAIL on the display. If the gauge reports FAIL then the sensor detected too

low a level of oxygen; this is typically indicative of a sensor being left in the exhaust pipe or in an environment with excess

exhaust/chemical fumes.

7/12/2017 - DOCUMENT NUMBER: 10-0300

30-0300 X-Series UEGO Gauge

The process will

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