Calibration Terminology

Below is the definition of each term used within the tank calibration page.

Actual:   Veritable Calibration.

Theoretical:    Hypothetical Calibration.

Reference Point:    Fixed point of mark at or near the top of the tank, the highest point of the tank or otherwise noted on the calibration chart.

Strike Point:    Fixed point of mark at or near the top of the tank, the highest point of the tank or otherwise noted on the calibration chart.

Reference Depth:    Distance from the reference point to the bottom of the tank and noted on some calibration charts.

Gaging Height:    Distance from the reference point to the bottom of the tank and noted on some calibration charts.

Gauge Height:    Distance from the reference point to the bottom of the tank and noted on some calibration charts.

Ullage:    Distance from the reference point to the surface of the liquid in a tank.

Outage:    Distance from the reference point to the surface of the liquid in a tank.

Inage:    Depth of liquid in a tank measured from the surface of the liquid to the tank bottom.

Shell Full:    Capacity designates that a tank is filled to it's shell capacity.

Nominal Capacity:    97% of shell full capacity.