A multimeter is also often called a “multitester” because it is designed to measure a fairly wide range of indicators: measuring direct and alternating voltage, resistance and current. Many multimeters also have the ability to measure the gain of transistors and have a special mode for testing diodes, testing circuit continuity for short circuits, etc. In one word - “multi” (for many) “tester”.
Expensive models of such measuring devices also include additional functions: temperature measurement (using a thermocouple probe), coil inductance, capacitor capacitance.
We will learn how to use a multimeter using the example of a budget Chinese-made device worth 10-15 dollars “XL830L”, which I use.
Its delivery set includes a set of simple “probes” (red and black wires in the photo above), with the help of which measurements are made. If necessary, they can be replaced with better ones or more convenient ones.