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MoTeC M1 Software Tutorial: EGT Input

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EGT Input


00:00 If you want to monitor exhaust gas temperatures with an M1, this can be achieved in two ways.
00:05 A thermocouple amplifier can be wired to a spare analogue voltage input or you can add a MoTeC E triple eight or e eight one six expansion unit.
00:15 The E triple eight has eight built in thermocouple amplifiers, while the E eight one six provides sixteen analogue voltage inputs which can then be used in conjunction with a thermocouple amplifier.
00:27 You can then wire your each EGT sensor through the expansion unit and the data will be sent to the M1 via CAN.
00:34 We can configure this function from the ‘Multi Exhaust Temp’ worksheet in the ‘Engine Systems’ workbook here.
00:41 We will start by enlarging the ‘Calibrate’ element so we can see what we need to configure.
00:46 The configuration will vary if you are using a thermocouple amplifier of an expansion device for the EGT inputs so first we will look at configuring the inputs directly as analogue voltage inputs.
00:58 In this case we can leave the ‘E8XX Mode’ set to disabled as this is only used for an expansion device.
01:06 Likewise the CAN bus is not used.
01:09 Now we have some diagnostic settings that the M1 will use to decide if the sensor is faulty.
01:14 As usual, these need to be set outside the normal operating range of the input so they are only exceeded if the input is actually faulty.
01:23 This works in conjunction with the ‘Diagnostic Delay’ value and the diagnostic values will need to be exceeded for this long before the sensor is considered to be in fault.
01:32 The default value will be used as the reading for this particular cylinder if the sensor is deemed to be in fault.
01:38 We will just move out of order for a second and moving down a little, we can define the voltage resource that this particular EGT sensor is wired to and the voltage reference which will depend on which voltage resource you are using.
01:51 Now we can move back up and set the calibration for the thermocouple amplifier.
01:57 If the signal is particularly noisy you can also choose to filter the value if necessary.
02:03 If you are using an expansion unit, we need to go back to the start and enable the ‘E8XX Mode’ and define which CAN bus it is connected on.
02:13 In this case the ECU will receive the data via CAN so we need to make sure the ‘Voltage Resource’ is set to ‘Not in Use’.
02:21 Next we need to define which CAN slot the data will come from and these can be viewed from the drop down menu.
02:28 The inputs listed with ‘TC’ in the title are dedicated thermocouple inputs available on the E triple eight.
02:35 If the data is coming from an E triple eight thermocouple input, you can leave the ‘CAN Type’ set to ‘Calibrated’ and you don’t need to worry about the ‘CAN Scale’.
02:44 If you are using an analogue voltage channel from the expansion unit then you will need to set these to suit the input the M1 is receiving.
02:52 The process for setting up any additional EGT inputs is just a repeat of this process.

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