You can put the internal measurement readings on your screen by using FRStack and ticking the meter window. You can get PA voltage and temperature, Power, SWR and so on. Change log # 5782 must be a firmware correction applied to the voltage sensor.
Dave, they are talking about different "meters" aka values, available in the Flexlib api for programing.
Not necessarily actual meters in SSDR. Although, these values could be used in SSDR and displayed as meter values, not all of them are. Get the Flexlib api and docs and have some fun building a custom app for your radio!