1. A voltmeter is a tool used to measure voltage (electrical pressure) in circuits.
2. There are two main types of electrical current: AC (Alternating Current) and DC (Direct Current).
3. AC current constantly changes direction, symbolized by a wavy line (~).
4. DC current flows in a constant direction, symbolized by a straight line with dashes (-)
5 . Voltmeters have settings for both AC and DC measurements.
Use the wavy line setting (~) for AC measurements.
Use the straight line with dashes (-) setting for DC measurements.
6. It's safe to switch between AC and DC settings while using the voltmeter.
Amps (amperage) measure electrical current strength.
Similar to voltage, ammeters (clamp meters) have settings for AC and DC.
When using a clamp meter, only clamp around one conductor (wire) at a time, not the entire cable.
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