Sep 12, 2012 // Parts Photos //
Wideband Air/Fuel Meter
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The MoTeC Professional
Lambda Meter (PLM) accurately determines exhaust gas mixture strength over
a wide range of engine operating conditions with a fast response time.
This device has been designed to be quick and easy to use, whilst allowing
a calibration engineer all of the power and configurability required for
OE emissions development and certification work.
Weighing only 135 gms and with a robust aluminium enclosure it can be
conveniently mounted singularly, on in multiples, in almost any
application. The operating range of the device is between 0.7 and 32.0
Lambda. For Gasoline/Petrol this equates to an Air/Fuel Ratio range of
10.3:1 to 470:1.
The display may be set to show Lambda, Air Fuel Ratio or Equivalence Ratio
for any sensor compatible fuel (Gasoline/Petrol, Alcohol, Gas, Diesel or
“blend” fuel as defined by the user). The resolution of the
display (decimal points), display update rate, display filtering,
backlight intensity may all be defined by the user with the Windows setup
The MoTeC PLM provides an differential Analog Voltage Output that may be
connected to an Analog Meter or other measurement instrument such as a
Data Logger or Chart Recorder. The output may be defined by the user to be
linear or non-linear in relation to the measured units. The PLM also
supports 1mbit CAN and RS232 data links to devices such as the MoTeC
Dash/Logger for transmission of sensor and diagnostic data. Comprehensive
diagnostic and status channels are provided for.
The MoTeC PLM configuration determines exactly how it operates. The
initial configuration will allow the MoTeC PLM to be connected to a power
supply and sensor, displaying Lambda values without any modification to
the configuration. Changes can be made to the configuration to alter
various aspects of the MoTeC PLM. This includes the display parameter (eg.
to A/F ratio), display formats, analogue output scaling, sensor type,
sensor calibration, backlight intensity, etc. Standard configuration
templates for most common preferences are included. The user can manually
select the sensor used as Bosch LSU or NTK UEGO. Selecting
“Auto” allows the MoTeC PLM to determine the type of sensor
being used. The sensor can be user calibrated to compensate for sensing
aging and contamination.
The two prime applications for this device are for the development and
tuning of emission controlled vehicles and for use in motorsport. The
highly competitive motorsport environment requires that all aspects of the
vehicle are optimally calibrated and perhaps no area is more critical than
The engine will normally give best performance at only one mixture
strength and the MoTeC PLM lets you accurately determine the direction and
magnitude of adjustments that need to be made to achieve this. The MoTeC
PLM can be used equally effectively on fuel injected and carburetted
vehicles. The versatility and practicality of the MoTeC PLM makes it
perfect for a wide range of applications, from garages to motorsport and
OEM calibration professionals.