There are many types of power analyzers on the market now. Due to the different emphasis of power analyzers, there are relative differences in function and performance. The selection of power analyzers is a question worthy of discussion. The following is an analysis of the selection of the power analyzer. As for the power analyzer, we all know that it is generally based on digital sampling technology, with high-performance microprocessors, CPLDs, etc. as the basic devices. The main imported power analyzer manufacturers sold in mainland China are: Japan's HIOKI (HIOKI), Japan's Yokogawa (YOKOGAWA), American Fluke (FLUKE), Germany's ZIMMER, etc. The domestic power analyzer manufacturers mainly include: Yinhe Electric, Hangzhou Yuanfang, Qingdao Qingzhi, Guangzhou Zhiyuan, etc. Due to the lack of standards and the unsound traceability system of quantity value, the technical indicators of power analyzers of major manufacturers are not unified, and some manufacturers express or imply, omit or ambiguous wording in product promotion based on commercial purposes, which makes consumption misunderstood the real situation and influence their purchasing decisions and other economic behaviors. (See "Revelation of the Basic Errors and Accuracy of Imported High-precision Power Analyzers_Defending the Rights and Interests of the Chinese People"), the accuracy index of power analyzers is falsely high and the nominal method is chaotic. Difficulties. The accuracy index of the power analyzer is falsely high, and the phenomenon of confusion of the nominal mode is common, which increases the difficulty of the user in the selection of the power analyzer. It is not uncommon for cases to cost a lot of money but not get accurate measurement results due to improper model selection. The reasons for not being elected can be summarized in the following aspects: 1. The function and operation mode of the power analyzer do not conform to the habits of the observer; 2. Don't know the tested object; 3. Not familiar with measuring instruments; 4. Not using the correct measurement method; 5. The influence of measuring conditions on measuring instruments is not fully grasped. So, how to select models to protect the legitimate rights and interests of consumers and ensure the correctness and accuracy of power measurement? In fact, any measurement process has a commonality, which is the five elements of measurement, such as the observer, the object to be measured, the measurement instrument, the measurement method, and the measurement conditions, which have been summarized by predecessors. The correct power analyzer selection should start from the measurement of five elements: 1. Try to choose a power analyzer that matches the observer's knowledge structure and usage habits; 2. Carry out a more comprehensive understanding and evaluation of the measured object, and determine the specific requirements for the power analyzer; 3. Comprehensively analyze the performance indicators of the power analyzer as a measuring instrument in combination with the characteristics of the measured object; 4. The selected power analyzer should have the correct measurement method; 5. Pay special attention to the influence of the conditions of use on the accuracy index of the power analyzer, because the accuracy index of the power analyzer under the conditions of use has practical significance. SHAOXING COLORBEE PLASTIC CO.,LTD , https://www.colorbeephoto.com