Getting Started
The current pro
be is shown connected to a power supply line. (See Figure 9.)
Notice that the probe arrow points toward the negative terminal of the power
supplytoconf
orm to the conventional current flow of positive (+) to negative (-).
To measure DC current, perform these steps:
1. Open the pro
be slide, place the probe around the conductor under test, and
then lock the slide.
2. For correct
measurement polarity, make sure the probe arrow is po inting in
the direction o f conventional (positive to negative) current flow. Reversing
the flow will display the current waveform upside-down on the oscilloscope.
3. Adjust the oscilloscope time base, trigger, and gain as needed.
Figure 9: Arrow on current probe indicates conventional current flow
14 TCPA300/400 Amplifiers and TCP300A/400 Series Current Probes User Manual
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