Introduction to the selection switch, test leads and test lead jacks of the multimeter
The selector switch of the multimeter is a multi-position rotary switch. Used to select measurement items and ranges. General multimeter measurement items include: "mA"; DC current, "V (-)": DC voltage, "V (~)": AC voltage, "Ω": resistance. Each measurement item is divided into several different ranges for selection.
Test lead and test lead jack
The test leads are divided into red and black. When in use, insert the red test lead into the jack marked "+", and insert the black test lead into the jack marked "-".
