MMD 540H Hybrid Multimeter Meter Functions 23
Meter Functions – ms-PULSE (Pulse Width) & ms-PERIOD (Period)
Pulse Width is the length of time an actuator is energized. For example, fuel injectors are activated by an electronic pulse from the Engine Control Module (ECM).
This pulse generates a magnetic field that pulls the injectors nozzle valve open.
The pulse ends and the injector nozzle is closed.
This open to close time is the Pulse Width and is measured in milliseconds( ms).
The most common automotive application for measuring pulse width is on fuel injectors.
You can also measure the pulse width of the fuel mixture control solenoid and the idle air control motor.
Measuring Pulse Width on Port Fuel injectors is described on the following page.
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MMD 540H Instruction Manual Version 1 February 2008 | Robert Bosch LLC |
