Long, thin needles are inserted at specific pressure points along an animal's body to alleviate pain and stimulate the central nervous system. (waterlooanimalhospitalok.com)
Low tire pressure warning stays on even though all tires are at the manufacturers specific pressure of 32 pounds. (truecar.com)
So, for example you wouldn't need the system specific pressure / temperature values to tell the status of your AC. (mechanics.stackexchange.com)