Plug the black lead into the COM (-) jack and the red lead into the (+) jack.
The Micronta 22-212 is a vintage 8-range analog multitester originally sold through Radio Shack. Known for its durable handheld design and simplicity, it remains a popular tool for hobbyists and collectors who prefer analog needle movements for tracking fluctuating signals. micronta multimeter 22 212 user manual
Remove the battery if the meter will be unused for more than a week to prevent corrosion from leaks. Plug the black lead into the COM (-)