[Danny’s] approach was not to use the ammeter scale. Instead ... known source), you can convert the voltage to a current. For example, on a Fluke 115 meter, [Danny] found that he could read ...

For example, 20 A is a bigger current than 5 A. The word ‘ampere’ is often abbreviated to ‘amp’, so people talk about how many amps flow. A device called an ammeter is used to measure current.