A multimeter, often referred to as a volt-ohm-millimetre (VOM) or volt-ohmmeter, is an instrument that measures various electrical parameters. It can evaluate current, voltage, and resistance; certain models can also measure temperature and capacitance. Electrical engineers and technicians utilise multimetres to troubleshoot electrical problems.
To determine the voltage of a live wire, set your multimeter to the AC voltage mode, place one probe on the live wire and the other on a grounded surface (like a metal pipe), and check the voltage displayed on the meter; a reading above zero indicates that the wire is live and carries voltage.
Discover the incredible versatility of a multimeter in ways you can put this handy tool to use:
There are several types of multimetres, including analogue, digital, auto-ranging, and clamp meters:
Multimetres, often called volt-ohm-millimetres or volt-ohmmeters, can measure various electrical parameters, including voltage, resistance, and current.
The four main components of a digital multimeter are:
Multimetres are instruments used to measure the electrical properties of a circuit or device. They are capable of measuring current, voltage, resistance, temperature and capacitance. These are essential tools for anyone working with electrical devices or circuits. They have probes that connect the multimeter to the circuit being measured.
Most multimetres typically feature three ports: COM (or “-”), mAVΩ, and 10A. The black probe is generally connected to the COM port, while the red probe is inserted into the mAVΩ port.
To use a multimeter, you can:
Safely measuring the voltage of energised wires is crucial for all electrical tasks. Here’s a detailed guide on how to use a multimeter for precise voltage readings:
Double-check that your probes are connected appropriately to get the most precise readings. Good joining is key to being safe from misinterpretations.
A multimeter is pivotal for assessing electrical characteristics like voltage, current, and resistance. To accurately measure the voltage of a live wire, it’s important to select the appropriate mode on the multimeter and connect the probes correctly.
Whether used to examine wall sockets and batteries or diagnose circuit issues, a multimeter offers rapid insights into electrical systems, making it indispensable for professionals and DIYers.