ISO 7507-3:2006规定了一种校准程序，适用于直径大于8 m且圆柱形层基本垂直的储罐。它提供了一种在计量液位下确定储罐内容量的方法。确定半径所需的测量是在内部或外部进行的。外部方法仅适用于无绝缘的储罐。 ISO 7507-3:2006适用于倾斜至垂直偏差3%的储罐，前提是按照ISO 7507-1中的说明对测量的倾斜进行校正。

ISO 7507-3:2006 specifies a calibration procedure for application to tanks above 8 m in diameter with cylindrical courses that are substantially vertical. It provides a method for determining the volumetric quantity contained within a tank at gauged liquid levels. The measurements required to determine the radius are made either internally or externally. The external method is applicable only to tanks that are free of insulation. ISO 7507-3:2006 is suitable for tanks tilted up to a 3 % deviation from the vertical, provided that a correction is applied for the measured tilt as described in ISO 7507-1.