Heat meter test detection value standards affect the development of the industry

Recently, it was learned that some heat meter manufacturers have a manufacturing license for the meter, and the factory's products also have a certificate. However, they have been certified as unqualified after going from place A to place B; or they have obviously been unqualified after installation and operation. The problem. This situation has occurred in a large number of domestically produced tables. One of many reasons, in the inspection and inspection work.

Some companies do not actually have the verification capabilities, or even have not been tested; there are two types of quality specifications for the inspection and sales tables; while some companies have verification devices, there are technical problems or operators Training - and so on. The relevant leaders of the State Administration of Work of Supervision have already investigated and understood the above-mentioned situations, including the standard equipment for hunger verification currently used, and there is also the problem of inconsistency in the measurement standards.

As we all know, the overall accuracy of the heat meter will produce the largest error under the condition of low flow and low temperature difference. For products from two European countries, the relative deviation of measurement results is within 1-3%. In this kind of consistency, I think it is also possible to explain the level of their respective measurement inspections, verification system devices and technologies.

In November 2004, the Ministry of Construction has established the “Quality Supervision and Inspection Center for Heating Supply of the Ministry of Construction”, which includes the quality of the heat metering products used in the heating system and will conduct supervision and inspection. The Metrology Division of the State Administration of Technology Supervision has included the task of drafting and formulating the national standards for the procedures related to the heat meter verification device system, which was included in the 2005 plan. Obviously, the verification and inspection of heat meters has been highly valued by the relevant government departments. Our heat meter manufacturer companies must establish as soon as possible a metrological verification device that can ensure product quality.

The author has the opportunity to investigate and understand some of the heat meter verification devices at home and abroad, but also conducted some research. Although it is not thorough enough, it is obvious that China's inspection and inspection devices and technologies have a large gap compared with foreign countries. Our heat meter manufacturing companies must establish as complete a metrological verification device as possible, not only for the national and local government certification agencies, but also for the production companies that really want to make the heat metering industry bigger and better.

A heat meter is a multi-part, electromechanically integrated instrument that involves a variety of cell technologies, and there is a need for improvement. R&D personnel must have a general concept, otherwise it may produce the result equivalent to “door-to-door”. In the development of IC card heat meters, some companies have already learned lessons. It is worth noting that there are improved flowmeters for R&D, improved research and development without magnetic sensors, as well as integrator software and hardware processes and structural design, etc., to avoid misconduct and cause wastage of human, financial, and material resources.