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Metering control

Metering control

First, according to market requirements, improve the adaptability of the measurement work

Measurement work is an important basis for the work of enterprises, it runs through the entire process of production and operation, in 2003, the International Organization for Standardization in the vote to 95 percent in favor of the adoption of IS010012: 2003 "Measurement management systems - Measurement process the measuring equipment ", and on April 15, 2003 formally promulgated by the international organization for standardization. IS010012 series of IS09000 standards, with strong market demand for the concept of metrological work contains many new understanding, new ideas and new demands. Promulgation of the new standard marks development enterprise metrological work entered a new phase. IS010012 standards emphasize the needs of the market, emphasizing the views of users, so it has a strong practicality, flexibility and choice. In IS010012 standard does not specify the assessment indicators relating to the measurement, nor tell which companies must purchase measuring and testing equipment, but for the enterprise metrological work to adapt to market needs by analyzing user requirements and other technical specifications, to choose measuring and testing equipment to meet the needs. IS010012 measurement requires companies should develop goals and plans, but does not indicate what specific measurable objectives and plans are, but requires companies to set their own goals and apply their own plans, different types of enterprises should be based enterprise products, enterprise scale, Objects , the environment, product quality is different, to develop their own measurement assurance program to establish suitable for their goals. IS010012 measurement requires companies to establish and confirm the measurement process control system and does not require companies to copy certain system, and control system and confirm the measurement process by the enterprises according to their need to establish measurement applicable. It did not provide documentation and sample programs, but developed by the companies themselves. How to use a standard measurement for Chinese enterprises personnel, there is a certain degree of difficulty, there is no format copy, there is no uniform assessment indicators set the tone for the entire enterprise must metering production and operation of enterprises is very familiar with the market and users It demands a deeper understanding of how to build to meet the needs of the proposed metering control system. Our business is to be based on consumer opinions on the quality of products, the suggestions and needs, to develop our measurement objective, plan, organize, carry out the measurement of our work.


Second, establish a scientific and effective Metrological confirmation system

Metrological confirmation system specifically includes measuring and testing equipment management, validation and file three parts. Metrological confirmation comprises measuring and testing equipment calibration, commissioning, repair, seal and flag, and a set of operating norms. From the content point of view alone, nine aspects of Metrological confirmation system for measuring and testing equipment specifications, performance requirements and equipped, storage and custody, traceability, record, label, environmental conditions, measurement and personnel management system requirements and Chinese Enterprises practice measurement work in essentially the same form. But Metrological confirmation system is the above items to consider engineering as a system, as a whole to operate, it will work through the program files of each part linked to a clear relationship between the various links, to play its overall effectiveness, not because changes in human and randomly change. In China, all aspects of the enterprise metrological work is often scattered in several departments to operate, there is no good convergence between its rules and regulations, departmental assessment of the enterprise metering equipment and metering performance measuring instruments are often not involved, measuring and testing equipment dispersed management, commissioning and repair nor unified management system can not form.

Establish a system must have a feedback system, IS010012 metrological confirmation system to confirm system requirements for periodic audits and reviews, as well as program files modification requirements constitute a feedback system Metrological confirmation system to ensure the implementation of the metrological confirmation system can, operate effectively, and in a state of dynamic equilibrium. With feedback to make the entire system is in operation at any time to adjust the inappropriate manner, so that the whole Metrological confirmation system can keep running on the right track. Thus constitute the management of measuring and testing equipment, validation, all closed-loop process and effective use of feedback. Thus showing the superiority of the enterprise metrological confirmation system. It can be modified by the program system, continuous improvement and development system in order to enhance the applicability of the system.

In addition, the metrological confirmation system is a documented system, the file system by linking the entire work. These documents should have a connection, normative, targeted, dynamic, legal nature. Metrological confirmation system as a carrier to confirm the work of all the metering drive and link up.

In short, IS010012 proposed Metrological confirmation system is a more systematic, scientific, standardized management system, enables companies to adapt to the measurement work more production and management, research and market needs.


Third, the principle of practical, reasonable choice confirmation interval

"OK Interval" often use "test period" to express in our country. In fact "test cycle" is just for verification purposes, and confirmed that the interval includes verification, calibration, commissioning, repair, and other delivery way time interval, so that the test cycle than the confirmation interval narrower range.

Our system under the planned economy to the amount of business pass way of measuring instruments mainly verified, that has a strong legal nature. Maximum duration of its period is often made to provide for a unified technical regulations, are not allowed to adjust their own business. Due to the situation of different enterprises use measuring instruments, such as: terms of the frequency of use, use the occasion, measuring performance of measuring instruments, and the use of the environment is not the same, and therefore universally applicable test cycle, it is impossible another way to pass different amounts of measuring instruments, such as: calibration, alignment, use or dissemination of information and other measuring measurement assurance program, which is not necessarily the same transmission interval. Measurement interval is too long will make the enterprise data misalignment caused risk, too short will increase expenses. For this reason, in practical work should be based on their own situation to develop specific intervals to confirm the objective evaluation criteria, and according to the interval selected as the impact on the recognition provisions. So that the "dead period" into a "living space." With minimal expenditure to get the maximum benefit measurement.


Fourth, strengthen data management, control over the measurement process

IS010012 made a point of asking and methods of measurement process control, which is the enterprise metrological work of deepening and development.

Measurement process and the production process is very similar. Measurement process "product" is the measurement data. The difference is that industrial product specifications are artificially designed and imposed on the product, measured data "Specifications" is the average of the measurement process is limited long-term accumulation of data, not artificially designed, but the measurement process itself own, long-term historical data calculated.

Measurement process control is the control of the measurement process in accordance with the quality control of the production process. Therefore, to control the measurement process measurement uncertainty evaluation process, especially when the measurement results of doubt or dispute on the special needs of Uncertainty. With accurate measurement process control can automatically determine the measurement accuracy of the data given in the confidence level required. In assessing the uncertainty of statistical methods can be used, and can not be assessed by the method of statistical uncertainty, mining limit correction mode or estimated uncertainty.

Objective measurement process control is to ensure reliable and accurate measurement data. It is not only in the management requirements of enterprise metering sector important measurements give inspection, certification or measured directly by the metrological department, not just the data required to measure and control the formation of integrated production. It is through the measurement of statistical data, analysis of the measurement uncertainty of whether the error is within the allowable range, enabling measurement process control, is a scientific quantitative analysis method, it can measure the long-term controlled data. Since the process is also a traceable measurement process, it is also suitable for the control of traceability data.

In order to achieve control of the measurement process, enterprises should establish a set of appropriate assurance measures, such as: documentation requirements, responsibilities distribution system and technical specifications of the measurement process, including equipment, measuring the extent, conditions of use and other factors; establishing the control system of the measurement process, analyze measurement data, the measurement process verification, monitoring and control system failure corrective action. Measurement and process control systems for periodic audits and reviews and so on.

In short, we are through monitoring and analysis of measurement data obtained, identify problems and take timely corrective measures, so that the measurement of performance measuring and testing equipment continuously maintained within a predetermined range of characteristics.