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本文介绍为建立气体流量标准装置而研制的专用电子天平，其最大称量为３ｔ，读出能力为１ｇ，总不确定度不大于２ｇ。该天平的横梁为不等臂杠杆，采用由一把支点刀、一把重点刀和两把力点刀构成的四刀结构，支撑系统为具有四根大立柱的框架结构；这些都是独创性的。测量系统采用电磁平衡式传感器技术，将非电量（质量）转变为电量（电流）进行测量，并实现了数据处理的自动化。
This article describes the establishment of gas flow standard devices and developed a special electronic balance, the maximum weighing 3t, readout capacity of 1g, the total uncertainty is not greater than 2g. The balance of the beam for the unequal arm lever, the use of a knife by a point, a key knife and two force point knife form a four-knife structure, the support system for the four large columns of the frame structure; These are original . Measurement system using electromagnetic balance sensor technology, the non-power (quality) into electricity (current) for measurement, and the realization of the data processing automation.