Eye Strain. When you stare at screens all day, your eyes can get tired. Take a break with the 20/20/20 rule. Look at an object at least 20 feet away for 20 seconds every 20 minutes, says Ivan Schwab, MD, a spokesman for the American Academy of Ophthalmology.
Once you have the dial on your volt meter set to measure voltage, simply touch the black lead to the negative (-) terminal on your battery and the red lead to the positive ( ) terminal on your battery.
Select your multimeter function to measure voltage or resistance by turning the function knob or selecting a function button. If you're going to measure voltage, such as measuring the power that is supplied to the circuit board, select either an alternating current (AC) or direct current (DC) voltage.