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.