How to Check 115 or 230 on a Voltage Meter
A voltmeter is a device that is used to measure the voltage of an electrical outlet or battery. A voltmeter is also known as a voltage meter. Some voltmeters are mounted in a panel while others are portable units. It is often more practical for electrical professionals to use a portable device that measures not only voltage, but also other electrical measures such as current and resistance. One such device is the volt/ohm meter or VOM. The volt/ohm meter is sometimes referred to as a multimeter or a multitester. Both the voltmeter and the multimeter may be either analog or digital. An analog meter moves a pointer across a scale to reflect the voltage of the circuit. A digital meter gives a numerical or "digital" display of the voltage of the circuit.
- Set the voltmeter to the AC voltage closest to the voltage you will measure. The United States, Mexico and Canada generally use 110/120 volt electrical outlets for electrical household appliances and equipment such as lamps, computers, televisions and power tools. Some electrical outlets use 220/240 volts for large equipment and appliances, such as stoves and dryers. 220/240 circuits are easily identified by their non-standard plug configuration. Most European countries and countries in other parts of the world generally use 220/240 volt electrical outlets.
- Hold the insulated portion of the probes. Place one probe into each terminal, being careful not to touch the metal parts of the probes together or to anything else.
- Read the meter scale or display.
- Remove the probes from each of the two terminals, being careful not to touch the metal part of the probes to each other or to anything else.
- Call a professional electrical service if the voltage reading is not within the typical range of the particular electrical circuit. For a 120 volt wall outlet in the United States, the normal range would be 108 to 121 volts. In this example, a professional should be called in the voltage measures less than 108 volts or more than 121 volts.
Things You Will Need
- Voltmeter or multimeter
- Positive input terminals are generally red or designated by "(+)," while negative input terminals are generally black or designated by "(-)". However, when checking the AC voltage of an electrical outlet, it does not matter which colored probe is inserted into which terminal.