Select the specific 1.5V or 9V battery test range on the dial.
While some models require you to select the range, the 4320 series often features auto-ranging to simplify the testing process. equus 4320 manual pdf
This is why people buy the 4320.
Set the dial to the range. Touch the red lead to the positive terminal and the black lead to the negative. A healthy, fully charged car battery should read approximately 12.6V . 2. Checking for Continuity Select the specific 1