Power Probe IV
www.powerprobe.com · 800-655-3585
VDC
- VDC mode is for testing DC (direct current) voltages.
Voltage testing is as easy as contacting the probe tip to a circuit
and reading the display. The Power Probe IV will display the
probe tip voltage in the center display.
The Power Probe IV automatically enters VDC Mode when first
connected to the vehicle’s battery, or to a 12-24 volt power
supply. VDC Mode is the only mode that the Power Probe IV can
supply battery power or ground by pressing the rocker switch.
If the Probe tip voltage is within 0.5 volts of the source battery
voltage and the circuit resistance is less than 10 Ohms, the Red
LED will illuminate and if the speaker is turned on, the speaker will
make a high-tone.
When testing on ground circuits, as long as there is less than 10
Ohms total circuit resistance from tip to battery ground, the Green
LED will illuminate and the speaker will make a low-tone.
This greatly simplifies testing as the Power Probe IV’s Red/Green LEDs and speaker tones provide
a quick indication if there are excessive voltage drops or circuit resistance. If the LEDs do not illumi-
nate and there is no tone from the speaker, you know instantly there may be a circuit problem.
Minimum and Maximum (MIN/MAX) voltages are shown on the bottom of the display. To reset the
MIN/MAX, press the left “CLR” button beneath the display.
VDC mode has a very high sampling rate that is good for tests where the tech is looking for glitches
or deviations from the main signal. This is a very sensitive mode that can capture even the smallest
voltage spikes or drop-outs without having to use a scope.
The Power Probe IV can safely measure up to 200 VDC.
Testing and Measuring Operations
DC Voltage Measurement in VDC Mode
In this mode, you will supply battery power or battery ground to
the tip when pressing the rocker switch
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