The terms defined here have a special and technical meaning when used in the Code for Carbon Dioxide Liquid-Measuring Devices.

automatic temperature or density compensation. The use of integrated or ancillary equipment to obtain, from the output of a volumetric meter, an equivalent mass indication.

carbon dioxide liquid-measuring device. A system including a mechanism or machine of (a) the meter or mass-flow type, or (b) a weighing type of device mounted on a vehicle designed to measure and deliver liquid carbon dioxide. Means may be provided to indicate automatically, for one of a series of unit prices, the total money value of the quantity measured.

large-delivery devices. Devices used primary for single deliveries greater than 1,000 pounds or 500 kilograms.

mass flow meter. A device that measures the mass of a product flowing through the system. The mass measurement may be determined directly from the effects of mass on the sensing unit or may be inferred by measuring the properties of the product, such as the volume, density, temperature, or pressure, and displaying the quantity in mass units.

small delivery device. Any device other than a large-delivery device.

transfer standard. A measurement system designed for use in proving and testing carbon dioxide liquid-measuring devices.

vapor equalization credit. The quantity deducted from the metered quantity of liquid carbon dioxide when a vapor equalizing line is used to facilitate the transfer of liquid during a metered delivery.

vapor equalization line. A hose or pipe connected from the vapor space of the seller's tank to the vapor space of the buyer's tank that is used to equalize the pressure during a delivery.

wet-hose type. A type of device in which it is intended that the discharge hose be completely filled prior to each commercial delivery.

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