What happens next in this paragraph?

How to deal with a police polygraph test
Understand the various parts of the polygraph equipment.
This will help you appreciate what the machine is and is not capable of. When you sit down to take the exam, you will be fitted with a blood pressure cuff, a pneumograph, and two galvanometers.
A galvanometer is a finger plate that is placed on your fingers and that measures how much you perspire as a result of stress. A blood pressure cuff keeps track of your blood pressure.