Multimeter symbols

About the multimeter symbols

A multimeter is a vital tool for anyone working with electrical circuits. It has the multi-measuring features of a voltmeter, ammeter, and ohmmeter. It is important to know the multimeter's symbols to avoid mistakes while measuring.

The multimeter uses some common symbols like "V" for voltage. A straight line represents direct voltage. A wavy line represents alternating voltage. Likewise, "A" represents current: a straight line for DC and a wavy line for AC. The use of the omega (Ω) symbol indicates resistance, and arcs state continuity testing.

Many multimeters today have symbols for specific purposes. For example, parallel lines state capacitance when measuring farads. There is also an auto range that can be set without manual changes. The HOLD, indicated by "HOLD", suspends the display. The min/max function records the lowest and highest readings during the measurement.

Voltage (AC and DC)

AC voltage is represented by V, which has a wavy line beside it. It measures the voltage across an electrical circuit in volts utilizing AC power.

The symbol for DC voltage is V, with a straight line over it. It measures the voltage across an electrical circuit in volts, determining the potential difference across the outlets, wiring, or devices.

Current (AC and DC)

"A" with a wavy line represents AC(alternating current) that is used to measure current in AC devices. Whereas "A" with a horizontal straight line represents DC(direct current) and is used to measure current in DC appliances.

Resistance (Ω)

The omega symbol is Ω, and it refers to measurements of electrical resistance that define how much a certain component resists the electric current.

Continuity

The form of arcs or a sound wave symbol illustrates continuity and is used to check whether a circuit's path is complete.

Capacitance (F)

The capacitance symbol in most cases consists of parallel lines and describes characteristics, such as the capacitance of individual components, for instance, capacitors in farads.

Auto range

Auto range eliminates the need for manual range selection, simplifies the process and ensures accuracy.

Hold

There is also a hold function indicated by the symbol “HOLD” which stops or pauses the current reading on the digital device.

Min/Max

This feature records and displays the minimum/maximum value sensed during the measurement period.

Diode test

The diode test symbol comprises a triangle touching a line and is used to test diodes.

Transistor gain (hFE)

The hFE symbol indicates the amplification of an input signal by an amount of a transistor.

Frequency (Hz)

The hertz is a unit that refers to how often the frequency symbol measures the oscillation rate for AC currents.

Duty cycle

The duty cycle symbol indicates how long a signal is high or low in each cycle. It's essential for tasks like pulsing and timing, such as pulse width modulation.