How to measure AC/DC voltage

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This is straight from the full owner's manual for the Innova 3320 digital multimeter

1. Plug the BLACK test lead into the COM jack of the multimeter. Then, plug the RED test lead into the V jack.

The COM jack is located in the middle. The V jack is located to the right.

2. Set the meter’s Function/Range Selector Switch to the appropriate ACV or DCV position as desired.

3. Place the RED test lead onto the positive (+) side of the item being tested and the BLACK test lead onto the negative (-) side of the item. BE CAREFUL not to touch any energized conductors with any part of your body.

4. Read the results on the display.

The Innova 3320 digital multimeter can be purchased on Amazon.

The Innova 3340 digital multimeter can be purchased here.

!WARNING!
To avoid possible electric shock, instrument damage and/or equipment damage, DO NOT attempt to measure voltages ABOVE 600V AC/DC or take measurements if the voltage is unknown. 600V AC/DC between the COM and V jacks is the maximum voltage that this instrument is designed to measure. The COM terminal potential should not exceed 300V AC/DC measured to ground.

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