POWER PRO BETEK Power Probe 3EZ Manual De Instrucciones página 21

MODES
on the display, the sound of the signals will be monitored and
heard through the PP3EZ speaker. The peak to peak threshold
levels are pre-selected by the operator in "Mode 5". See Mode
#5 for more information on setting threshold levels. Placing
the PP3EZ probe tip next to a sparkplug wire (NOT probing it
directly), allows you to monitor the sound of the ignition pulses
at the same time display a peak to peak reading The PP3EZ
senses the pulses in ignition wires through capacitive coupling
(DO NOT CONTACT PROBE TIP DIRECTLY TO THE SECOND-
ARY IGNITION CIRCUIT). By monitoring each plug wire in this
way you can locate missing cylinders.
Mode #2 Peak to Peak Mode: The Peak to Peak Mode mea-
sures the difference between the positive and negative peak
voltage levels over a 1 second period. With this feature you
can measure and monitor for example, the diode rectifier
ripple voltage in a charging system while the engine is run-
ning. The peak to peak readings will give the technician the
data necessary to determine if a diode rectifier is defective or
not. A normal peak to peak reading while testing a charging
circuit is usually under a volt. If a defective rectifier is present
the peak to peak reading will be over 1 volt and possibly over
3 volts. Probing in "Peak to Peak Mode" is the optimum mode
to display the activity of circuits such as fuel injectors, distrib-
utor pick-ups, cam and crank sensors, oxygen sensors, wheel
speed sensors, hall effect sensors, or any other pulsed DC
signal. It also measures fly back voltage of injectors to quickly
find a problem.
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