MoTeC AFM1 User Manual
MoTeC
AFM1
Air Fuel Ratio Meter
5 June, 2003
Copyright – MoTeC Pty Ltd – 1993-2003
The information in this document is subject to change without notice.
While every effort is taken to ensure correctness, no responsibility will be taken for the consequences of any
inaccuracies or omissions in this manual
.
MoTeC Table of Contents i
Specifications..................................................................... 1
Meter .............................................................................................1
Meter Analog Output .....................................................................1
Sensor ...........................................................................................2
Meter Operation.................................................................. 3
Introduction....................................................................................3
Sensor Placement .........................................................................3
Sensor Life Time ...........................................................................3
Sensor Warm Up...........................................................................3
Power Supply ................................................................................4
Connections ..................................................................................4
Lambda..........................................................................................5
Display...........................................................................................5
Changing the Display Mode................................................5
Engine Tuning ...............................................................................6
Operating Tips...............................................................................6
Analog Output ...............................................................................7
Setting the Output Voltage Range ......................................7
Output Fine Adjustment ......................................................7
Appendices......................................................................... 9
Appendix A - Lambda to Air Fuel Ratio Table..................................................... 9
Appendix B - Sensor Wiring Details .................................................................. 10
Appendix C - Analog Output Wiring Details ......................................................11
Appendix D - Analog Output Modes.................................................................. 12
Appendix E - Analog Output Calibration Levels ................................................ 13
Appendix E - Error Codes ................................................................................. 14
MoTeC Specifications 1
Specifications
Meter
Operating Voltage Range 7 to 16 V DC
Operating Current 0.3 A Max. (Excluding Sensor)
Reverse Voltage - 24 V DC Max.
Transient Protection 10 Joules (100A / 10ms) (Clamping Voltage
24V)
Operating Temperature 0 to 60 deg C
Operating Humidity 0 to 80 % Non Condensing
Measurement Range 0.75 to 1.60 Lambda
Measurement Accuracy ± 1.5% 0.75 to 1.05 Lambda
± 2.5% 1.06 to 1.25 Lambda
± 5.0% 1.26 to 1.60 Lambda
Display Update Rate 3.5 Times per second
Response Time < 150 msec (To 63 % of Final Reading)
Weight 575 g
Dimensions 142 x 48 x 96 mm (WxHxD)
Meter Analog Output
Output Type Isolated (Floating)
Output Isolation 400 V DC Max.
Output Voltage Range 0 to 5 V DC Max. ( Dependant on Range
Selection )
Output Current 1 mA Max.
Response Time 100 ms 0.75 to 0.95 Lambda
150 ms 0.96 to 1.05 Lambda
50 ms 1.06 to 1.60 Lambda
(To 63 % of Final Reading)
2 Specifications
Sensor
Sensor Type Wide Band
Heater Voltage 12 to 14 V DC
Heater Current 1.5 A Nominal (Hot)
5.0 A Max. (Cold)
Operating Temp 250 to 800 C (Heater ON)
450 to 930 C (Heater OFF)
* Life Time > 500 Hrs (Unleaded Fuel)
> 50 Hrs (Leaded Fuel)
Thread Type M18 x 1.5
Note Life Time is dependant on a number of factors - See text.
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