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一、概述众所周知,在热量表构成中,配对温度传感器提供温度和温差的信号,流量计提供流量信号,积算器进行热量计算累计。配对温度传感器准确度要求较高,并具有较好的互换性,而温差测量性能对热量计量的影响量占较大权重,不可忽视。热量表实际安装运行的现场条件大多偏离实验室工况,如何在周期检定/校准间隔中对运行状态进行评价,即运行核查,保证热量计量数据准确可靠,对热量贸易结算的实施具有至关重要的作用。近年来,关于能源计量仪表运行核查技术的研究,是我国计量科技人员面临的新课题。下面,笔者就现场运行中的热量表采用等温法运行核查技术进行分析与探讨。
First, an overview As we all know, in the composition of the heat meter, the matching temperature sensor to provide temperature and temperature signals, the flow meter to provide flow signals, totalizer calculus calculation. Paired temperature sensor accuracy is higher, and has good interchangeability, and the temperature measurement of the impact on the amount of heat accounting for a larger weight, can not be ignored. Most of the on-site conditions of the heat meters actually deviate from the working conditions of the laboratory. How to evaluate the operating states during the cycle verification / calibration interval, that is, the operation verification ensures that the heat measurement data is accurate and reliable and is crucial to the implementation of the heat trade settlement Role. In recent years, research on the operation and verification technology of energy measuring instruments has become a new topic for our country to measure scientific and technological personnel. The following, the author on-site operation of the heat meter using isothermal method of operation and verification of the analysis and discussion.