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.
Resistance--measured in ohms, the basic unit of electrical resistance--is the opposition to the flow of free electrons in a circuit. Measuring the DC resistance through a transformer's winding is an easy way to judge the condition of a transformer without applying power to it.nstructions. Disconnect the transformer from the circuit before testing it. A transformer's winding forms a parallel connection with the circuit, and unless you disconnect at least one leg, you will get a false reading. Set up the DMM to read resistance and select an appropriate resistance range.