New Mechman 250 Alternator Question

[Doubeleive]

Good to know I have the 145a alternator. Can anyone recommend a decent amp clap meter or another way to measure what my alternator is putting out?

https://www.amazon.com/gp/product/B09M6D5BDD/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1