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Application Note

Top 10 Automotive Applications for the 190 Series Scopemeter® Digital Storage Oscilloscope

Fluke ScopeMeter 199c portable oscilloscope
 Oxygen Sensor: Track the signal rise and fall time as well as the minimum and maximum peak voltage values the sensor generates as the fuel system transitions from rick to lean and back to rich.
 TPS: Throttle Position Sensor voltage variations as the wiper in the sensor moves across the carbon track resistor, changing resistance and output voltage.
 Magnetic Sensors: Monitor the ac voltage signal as the change in amplitude and frequency varies with trigger timing.
 Hall Effect Sensor: Monitor the dc voltage variations in the signal effecting frequency and signal quality.
 Data Stream and/or CAN Bus Activity: Display and record the activity found on the active data stream identifying the presence of a communication protocol.
 Fuel Injectors and Fuel Pumps: Use a current clamp to monitor the current ramping of the fuel injector signifying the pulse width injection timing in resopnse to PCM fuel control. Use the current clamp to identify an open or shorted commutator segment on the rotor of a fuel pump, worn brushes and/or seizing bushings causing excessive current flow.
 Ignition System Performance: Display or record the high secondary voltage values to the spark plugs using a capacitive pickup or the lower primary voltage to the negative side of the coil.
 Voltage Drop: Quickly identify a high resistance connection on the power or ground side of a circuit by monitoring the dc offset values in a waveform.
 Relay and Contacts: Identify worn relay or switch contacts and any bounce in relay contacts as the relay closes.
 Recording Over Time: Use the advanced acquisition and recording features found on the ScopeMeter to acquire, store, share and recall the waveforms and setups with other users - even miles away.

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