MoTeC LTCN - Manual (Page 13)

MoTeC Configuration 13
address is hex 460, the slave devices must use CAN addresses in the
range hex 461 to 46F.
The Collect column on the main LTC
Manager Window shows the configuration
of CAN Collect Masters and Slaves. The
Master device is always shown as LTC
unit 1 (Master (1)), and the slave devices
are shown as LTC units 2 to 16 according
to the configured CAN address as shown
in this example.
Calibration
Warning: The Bosch LSU 4.9 Lambda sensors are fitted from factory with a
calibrated trimming resistor embedded in the sensor connector, if the factory
sensor connector is cut off and replaced with another type the LTC will not
operate correctly.
Note: Unlike the Bosch LSU 4.9 the NTK sensors standard connector can be
removed and replaced by a non-standard connector without affecting the
performance of the sensor or the LTC-N. However, the initial factory calibration
method will not work as the calibration resistor is built into the original
connector. In this case Free Air calibration is required. It is recommended that
no wiring modification is made to the NTK sensor or LTC-N unless completely
necessary.
Calibration Methods
Initial factory calibration
The default calibration method uses the known characteristics of a new
sensor that has been factory trimmed.
Free Air Calibration
As a sensor ages, the sensor calibration may change. To maintain accurate
readings, the LTC allows for re-calibration using the known oxygen
concentration of free air. The free air calibration procedure takes several
readings with the sensor in free air to calculate new calibration values.
To perform an accurate free air calibration, the lambda sensor must be
removed from the exhaust and placed in an open air environment.
It is recommended to perform the calibration outside of a workshop or dyno
room as there may be large amounts of hydrocarbons in the atmosphere.