With Auto on, changing mass or volume changes the submerged fraction using the object's density. Turn Auto off to control the submerged fraction manually.
Physics Model W = mg Fb = ρwVsubg T = W − Fb
Apparent weight is the spring-scale reading: Wapp = T
Auto submersion: f = ρobject/ρw
Spring Scale Reading
Apparent weight reading0%
Submerged fraction0%
Weight W
Buoyant force Fb
Tension / apparent weight T