Which term describes mounting a transformer above the bottom of the tank?

• A. Zero Suppression
• B. Zero Elevation
• C. Resolver
• D. Split Range

Answer: (B)

Zero elevation is about where the instrument’s zero reference is placed relative to a fixed point, like the bottom of a tank. If the transformer (or sensor) is mounted above the tank bottom, the zero reference is raised. The measurement must then be calibrated so that the displayed level corresponds to the actual tank level with that higher zero point. In other words, changing the physical mounting height changes where zero sits, and zero elevation describes that adjusted zero position.

The other terms don’t describe this mounting- height concept. Zero suppression is about trimming the lower end of a signal or scale, a resolver is a type of rotating transformer used for position sensing, and split range is a control strategy that splits a signal to drive actuators over different portions of a range.