Multitester

To measure temperature

To measure sound levels

To measure light intensity

To measure electrical properties such as voltage, current, and resistance

The device is turned off

The probes are connected to the correct terminals

The multitester is set to the highest voltage setting

The battery is removed from the device

To ensure that a function has no breaks, jumps, or holes

To verify that a function is differentiable

To determine if a function is increasing or decreasing

To check if a function is periodic

The circuit is continuous

The circuit is open or has a break

The battery in the multitester is low

The probes are not connected properly

V~

V-

A~

Ω or a symbol resembling a diode