AEM 30-4110 Digital Wideband UEGO Gauge - Manual (Page 13)

Page 13
Changing the gauge configuration
The AEM UEGO gauge comes configured with the black bezel and the black AFR
faceplate. However, a silver bezel, a white AFR faceplate, and a black Lambda
faceplate are also included in the gauge kit. To change the faceplate or bezel, orient
the gauge so you are looking at the faceplate. Rotate the bezel counter-clockwise to
unscrew it from the gauge cup. The bezel, glass lens, rubber spacer, faceplate, and
anti-glare shield are all removable. Reassemble the gauge as shown in the photo
below. Make sure the small light holes in the faceplate and anti-glare shield line up with
the light sensor on the circuit board. Do not over tighten the bezel when reassembling
the gauge. (Figure 11)
Figure 11. Gauge Assembly
For your reference, below is the multiplier for calculating the Air Fuel Ratio (AFR) of common
fuels from the Lambda value.
Gasoline AFR
= Lambda x 14.64
Methanol AFR = Lambda x 6.47
Propane AFR = Lambda x 15.7
Ethanol AFR = Lambda x 9.00
CNG AFR = Lambda x 14.5
Specifications:
Gauge
Supply Current (nominal):
1.3 amps
0-5V Analog Outputs: 1
Measuring Range: Sweeping LED 0.751 to 1.143 Lambda
Measuring Range: Numerical Display 10.0:1 to 18.5:1 AFR Gasoline
Harness & Connector Temp Limit:
105C
Sensor
Type:
Bosch UEGO LSU4.9
Accuracy: +/- 0.7%
Exhaust Temp Limit: 1030C
Cable & Protector Sleeve Temp Limit: 250C
Connector Temp Limit:
120C
Initial Warm-up Time: Less than 20 seconds
Weight: 80 grams
Heater Current: 1.2A at 12.0V (each sensor)
Mounting: M18 X 1.5 thread, Torque to 30 ft-lbs
Nominal Service Life:
80,000 km for Unleaded Fuel
50,000 km for Leaded Fuel 0.15g Pb/l
20,000 km for Leaded Fuel 0.40g Pb/l
10,000 km for Leaded Fuel 0.60g Pb/l