Clamp meters, also known as clamp-on meters or current clamps, are versatile electrical testing devices used to measure current flow in electrical circuits. They are commonly used by electricians, technicians, and professionals working with electrical systems. Clamp meters offer a convenient and non-intrusive method for measuring current without the need to disconnect wires or break the circuit. Here are some key features and functionalities of clamp meters:

1.      Current Measurement: The primary function of a clamp meter is to measure current. They can measure both alternating current (AC) and direct current (DC) flowing through a conductor. The clamp feature allows the meter to clamp around the wire, allowing for non-contact current measurement.

2.      AC/DC Voltage Measurement: Many clamp meters also offer voltage measurement capabilities. They can measure both AC and DC voltages to assess the voltage levels in electrical circuits.

3.      Resistance Measurement: Some clamp meters have a built-in resistance measurement feature. This allows users to measure the resistance of electrical components or circuits.

4.      Continuity Testing: Clamp meters often include a continuity testing function to check for the continuity of a circuit. It can detect open or short circuits by providing an audible or visual indication when a circuit is complete.

5.      Non-Intrusive Measurement: One of the main advantages of clamp meters is their non-intrusive measurement method. The clamp jaws can be clamped around a conductor without disconnecting or breaking the circuit, making it convenient and safe to use.

6.      Auto-Ranging and Manual Range Selection: Many clamp meters offer auto-ranging capabilities, which automatically select the appropriate measurement range based on the detected signal. Some models also allow manual range selection for more precise measurements.

7.      Display and Data Hold: Clamp meters feature a digital display that provides clear and easy-to-read measurements. Some meters also have a data hold function, which allows the user to freeze the display to capture and record readings.

8.      Additional Features: Depending on the model, clamp meters may offer additional features such as frequency measurement, temperature measurement with optional probes, diode testing, and capacitance measurement.

Clamp meters are widely used in various applications, including electrical maintenance, troubleshooting, HVAC (heating, ventilation, and air conditioning), industrial maintenance, and automotive electrical systems. They provide a convenient and efficient way to measure current without the need for direct contact with live wires, making them a valuable tool for electricians and technicians working with electrical systems.