仪表校准仪用于验证排量和涡轮流量计的读数，例如与卡车加油站安装一起使用的永久安装仪表，或安装在移动加油设备上的仪表，例如R-11 6000加仑加油机和R-12消防栓加油机。校准仪设计用于在30 GPM至600 GPM的工作流量范围内，在不超过150 psi的工作压力下，验证正排量和涡轮流量计。仪表校准仪由拖车底盘和传动装置组成，其中包括一个主仪表、合适的进出口管道和接头、排放软管和喷嘴、控制阀、一个接一个仪表的止回阀、压力计和2个温度计。主仪表校准仪将根据API MPMS 4-1和4-5进行设计。

The meter prover is used to verify readings on displacement and turbine meters such as permanently installed meters used with truck fill stand installations or meters mounted on mobile refueling equipment such as the R-11 6000 gallon refueler and R-12 Hydrant Refueler. The prover is designed for the verification of positive displacement and turbine meters within the operational flow range of 30 GPM to 600 GPM with operating pressures not to exceed 150 psi. The meter prover consists of a trailer chassis and running gear that contains a master meter, suitable inlet and outlet piping and connections, discharge hoses and nozzles, control valves, check valve after meter, and pressure and 2 temperature gages. The master meter prover will be designed in accordance with API MPMS 4-1 and 4-5.