The user presets


The adjustment of modes of work of USB Autoscope III is similar to the work with analog oscilloscope. However, there uses all advantages of digital electronics. One of this features is the ability to create or use presets in order not to have to adjust every time USB Autoscope III at the same regimes of work. Thus, you can adjust USB Autoscope III once on the most often used regime and save it, calling it such as "lambda-sensor" or download a universal user presets. And the next time when you will need to see oscillogram of lambda sensor output signal, you will not need to re-adjust mode USB Autoscope III, but simply cause a user preset "Oxygen-Sensor".


Universal presets.
  • "8 channel"
    Displays waveforms of voltage on all eight analog inputs of the USB Autoscope III without synchronization.
  • "Consumption"
    The mode is intended for calculation and display of the fuel consumption in percentage of maximum possible for the diagnosed engine. For doing this test, oscilloscope probe must be connected in parallel with operating lead of an electromagnetic injector of petrol engine and connected with 5-th analog input of USB Autoscope III.
  • "Hall"
    This preset is intended for displaying voltage from Hall sensor. For doing this test oscilloscope probe must be connected in parallel with the signal wire of Hall sensor and connected with 1-st analog input of USB Autoscope III.
  • "HFM5"
    The mode is intended for displaying of the voltage of output signal from the Mass Air Flow sensor (MAF sensor) BOSCH HFM5. It is recommended to do advantage with differential oscilloscope probe. The black "crocodile" clip from the differential oscilloscope probe should be connected to "ground" of the engine of the diagnosed car, the negative lead (black color) should be connected in parallel with "signal ground" of the MAF sensor (the lead ¹3 of the sensor socket), the positive lead (red color) should be connected in parallel with signal lead of the sensor (the lead ¹5).
    Instead of differential oscilloscope probe it is possible to use oscilloscope probe. Oscilloscope probe should be connected to an analog input ¹1 of USB Autoscope III, the black "crocodile" clip of oscilloscope probe should be connected to "ground" of the engine of the diagnosed car, the input lead of oscilloscope probe should be connected in parallel with the signal lead of the sensor (the lead ¹5).
  • "Ignition"
    Ignition systems diagnostics.
    • "Ignition"
      Displays high-voltage pulses of the ignition systems of all cylinders in the imposing mode.
    • "Ignition_Classic"
      Displays high-voltage pulses in the form of "parade of cylinders" and simultaneously displays in real-time the firing voltage, burn time and the spark voltage for each cylinder individually. The mode is intended for diagnosing ignition systems equipped with a distributor.

      For correct displaying of "parade of cylinders" may be necessary to adjust the level of synchronization for capacitive sensor, for which in the lower left corner of the program window click "Setup PlugIn" (with the icon of the hammer and screwdriver) to open the window "Setup" and correct value "Cap. sensor synchronization level:" so that the program steadily display "parade of cylinders".
    • "Ignition_Dis"
      Displays high-voltage pulses in the form of "parade of cylinders" and simultaneously displays in real-time the firing voltage, burn time and the spark voltage for each cylinder individually. The mode is intended for diagnosing DIS ignition.

      For correct displaying of "parade of cylinders" may be necessary to adjust the level of synchronization for capacitive sensor, for which in the lower left corner of the program window click "Setup PlugIn" (with the icon of the hammer and screwdriver) to open the window "Setup" and correct value "Cap. sensor synchronization level:" so that the program steadily display "parade of cylinders".
    • "Ignition_Cop"
      Displays impulses of a high voltage in an imposing mode. The mode is intended for diagnostics of individual ignition systems with use of a universal capacitive probe Cx Universal.
    • "Ignition_Primary"
      Displays the primary ignition voltage waveform on the control lead of the ignition coil. This mode is intended for the ignition systems diagnosing by the primary voltage. Oscilloscope probe must be connected to the 5-th analog input of USB Autoscope III and connected in parallel with control lead of primary circuit of ignition coil.
    • "Ignition_Sync"
      Displays high-voltage pulses of the ignition systems only that cylinder, at high-voltage wire which installed the first cylinder sensor (synchronization transducer Sync). The mode is intended for diagnosing ignition systems equipped with a distributor.
    • "Lx_Universal"
      This mode is intended for diagnosing of individual ignition coils without the built-in amplifier, the universal inductive transducer Lx Universal is used. The socket of the transducer Lx Universal should be connected to the input "Ignition" located on back panel of the USB Autoscope III, transducer Lx Universal must be installed above the diagnosed ignition coil. It is necessary to connect oscilloscope probe to the input "Sync" of the transducer, a black "crocodile" clip of the oscilloscope probe must be connected to the "ground" of the diagnosed engine, the lead of oscilloscope probe must be connected in parallel with operating lead of the diagnosed ignition coil.
    • "Lx_Universal+"
      This mode is intended for diagnosing of individual ignition coils with the built-in amplifier, the universal inductive transducer Lx Universal is used. The socket of the transducer Lx Universal should be connected to the input "Ignition" located on back panel of the USB Autoscope III, transducer Lx Universal must be installed above the diagnosed ignition coil. It is necessary to connect oscilloscope probe to the input "Sync" of the transducer, a black "crocodile" clip of the oscilloscope probe must be connected to the "ground" of the diagnosed engine, the lead of oscilloscope probe must be connected in parallel with operating lead of the diagnosed ignition coil.
  • "Ignition_Timing"
    Starts the PlugIn "Ignition phase measurement" which in real time calculates and displays ignition timing and RPM of the diagnosed engine.

    In order to perform this test, the spark plug on the cylinder used must be removed and the pressure transducer Px installed and connected to the 1-st analog input of USB Autoscope III. A spark tester with a spark gap of not less than 5mm must be connected to the plug wire and grounded. The cylinder sync probe Sync (black color) should be attached to the spark plug wire for this cylinder.


     Warning!
Do not run the engine for more than 3 minutes with the pressure transducer installed. Damage to the catalytic converter and/or the pressure transducer may occur.


  • "Inductive_Crankshaft"
    This mode is intended for displaying of the output signal voltage waveform of the crankshaft position sensor. In order to perform this test the oscilloscope probe should be connected in parallel with signal lead of the crankshaft position sensor and connected to 5-th analog input of USB Autoscope III.
  • "Injector"
    This mode is intended for capturing injector waveforms. The PlugIn "Time parameters" will calculate and display in real time the injector pulse width. The input lead must be connected to the switched side of the injector. The switched side, in most cases, is the negative side (or ground side) of the injector. An analog input ¹5 on the USB Autoscope III is used.
  • "Lambda"
    This mode is intended for displaying voltage waveform of the output signal of the lambda sensor (Oxygen sensor). Up to 4 sensors can be evaluated simultaneously, using input ¹1-4 of the USB Autoscope III.
  • "Lambda_LC1"
    The mode is intended for displaying the voltage waveform of the output signal of the wideband Lambda Sensor controller. For displaying of the coefficient Lambda waveform, it is necessary to connect the output signal of the wideband Lambda Sensor controller to any of the first four analog inputs of the USB Autoscope III. For displaying the current numerical value of the coefficient Lambda, it is necessary to choose "View => Current value indicator => Channel *".
  • "Phases"
    These modes are used for checking vacuum waveform in an intake manifold.
    • "Phases"
      This test is intended for checking the intake manifold pressure waveform of the engine. The low-pressure transducer Dx must be connected to the intake manifold. It may be necessary to use a "T" and connect in-line on an existing vacuum port. The low-pressure transducer can be connected to any of the first four analog inputs of the USB Autoscope III. The ignition and/or fuel delivery system must be disabled. The USB Autoscope III should be set to "record mode" (Control => Record). The engine must be cranked for 5-6 seconds, and then the recorded waveform can then be analyzed.
    • "Phases_Sync"
      This test enables th intake manifold pressure waveform to be synchronized with the ignition system. The low-pressure transducer Dx is connected as in the previous test. The low-pressure transducer can be connected to any of the first three analog inputs of the USB Autoscope III. The cylinder sync probe Sync should be attached to the spark plug wire of the first cylinder and must be connected to the input "In Synchro" of the Ignition Adapter. The adapter Ignition Adapter must be connected to the USB Autoscope III. The fuel delivery must be disabled. The USB Autoscope III should be set to "record mode" (Control => Record). The engine must be cranked for 5-6 seconds. The waveform, synchronized with the ignition, can then be analyzed.
  • "Potentiometer"
    This mode is used for testing potentiometers. Any of the first four inputs of the USB Autoscope III can be used.
  • "Px"
    Starts PlugIn "Phase measurement", allowing quickly and precisely to estimate correctness of mutual position crankshaft and camshafts of the diagnosed engine by the in cylinder pressure waveform.

    In order to perform this test, it is necessary to install the pressure transducer Px on the place of a spark plug of the diagnosed cylinder and to connect the socket of the pressure transducer to the 1-st analog input of USB Autoscope III, and connect the spark plug wire of the diagnosed cylinder to the spark gap with a spark interval no more 5mm.

    • The displayed signal can be recorded. For this it is necessary to choose "Control => Record". The recorded waveform can be analyzed, and, if desired, saved. To do so, select "File Save As.." in the "File" menu.