Lesson 3/Learning Event 4
Current Measurement
FIGURE 62. CURRENT.
Setting the TEST SELECT switches to the required test number tells the VTM to make a current
measurement when the TEST button is pressed and released.
VTM supplies constant voltage to the current probe.
The current probe returns a voltage in proportion to the current being measured.
Voltage developed by the current probe is measured and converted to current by the VTM.
The VTM displays the current in amps.
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