A customer recently called to ask questions about the electrical system on his machine. I asked if he had a voltmeter. There was a long pause, then he said, “Yes, but I don’t know how to use it.” He ...

Measuring airflow has always been one of the more difficult and time consuming tasks a service person does. In fact, it is not generally done because it is too time consuming, requires special tools, ...

When you need a multimeter for testing electrical equipment around the home, it's vital to know what all those symbols around the dial mean.