EMTRON ELC USER MANUAL
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© EMTRON AUSTRALIA PTY LTD MARCH 2018
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5.0 Heater Control and Sensor Calibration
5.1 Heater Control
During engine start-up, condensation forms in the exhaust which may damage the sensor. It
is recommended to only start heating the LSU sensor after the engine is running and the
moisture content in the exhaust has evaporated. ELC settings allow the ECU to control
heater setup if enabled.
For maximum sensor life the ECU should control heater start-up. It does this by
communicating with the ELC over CAN Bus. For setup options see Config View ->
Communications Tab -> Emtron CAN Device -> Emtron Lambda to CAN (ELC/ELCM) Setup.
See Figure 5.0.
Figure 5.0. Emtune ELC Setup menu - Heater Control
Once changed, the settings are automatically stored by the ELC and therefore used on the
next power cycle. If the CAN bus is not used to control the heater (Enable Heater Override =
OFF), then by default the heater remains OFF for 15 seconds after the device is powered up.
5.2 Sensor Calibration
The sensor is calibrated by the ELC on power up. During the Calibration process two
important pieces of data are read:
▪
The optimal
Nernst Cell Temperature
which is used for sensor heater control. The
ELC applies duty cycle and a PID routine to maintain a constant and accurate heater
temperature which results in a very stable and accurate Lambda value.
▪
The
Pump Current
that corresponds to a Lambda reading of 1.000 Lambda.
NOTE:
A Free-Air Calibration is NOT required on the LSU4.9. The sensor uses a reference
pump current instead of reference air. The big advantage with this is that the reference is a
calibrated electrical signal and remains constant.
