Current Measurement

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107

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.

106

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