Testec TT-CC 770 handleiding

Handleiding

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AC/DC Oscilloscope Current Probes TT-CC Series

E-11

English

Figure 2: Connecting the current probe

5. Adjust the oscilloscope’s channel amplitude and time base settings as

necessary to get a clear and stable signal. Set the oscilloscope input to

DC volts to see both the AC and DC currents; set the channel to AC to

see the AC current only.

The current drawn by selected devices can vary. While the RMS current

can only be used in low frequency current, the transient peaks can be

quite high. Figure 3 shows the difference between a line current drawn by

a resistive load and a motor controller.

Resistive

load

Motor

controller

Figure 3: Typical current waveforms

When connecting the current probe to a Digital Multimeter (DMM), use the

included BNC-to-banana adapter. Connect the black banana plug on the

adapter to the DMM’s COM or ground jack and the red banana plug to the VΩ

jack.

To measure only AC current, set the meter to measure AC volts.

To measure DC current, set the meter to measure DC volts. Note the current

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