General requirements of inspection procedures for preparation of measuring equipment in electronic industry
Some standard content:
Ministry of Machinery and Electronics Industry of the People's Republic of China Standard SJ3253-89
General provisions for the preparation of verification procedures for measuring instruments in the electronic industry
Published on March 20, 1989
Implemented on March 25, 1989
The Ministry of Machinery and Electronics Industry of the People's Republic of China issued the Ministry of Machinery and Electronics Industry of the People's Republic of China Standard for the preparation of verification procedures for measuring instruments in the electronic industry
1 Subject content and scope of application
1.1 Subject content
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This standard specifies the main procedures and requirements for the preparation of verification procedures for electronic measuring instruments at the ministerial level, and specifies the basic requirements for the preparation of verification procedures, the composition of the procedures and their preparation details. 1.2 Scope of application
This standard applies to the preparation of verification procedures for electronic measuring instruments at the ministerial level. Part I
Measuring instrument verification procedure writing procedure
2 The writing process and requirements of the verification procedure of measuring instruments The writing process of the verification procedure of measuring instruments is generally divided into four stages: drafting, pre-examination, review and sorting for approval. The main tasks and requirements of each stage are as follows:
2.1 Drafting pre-examination stage
The main tasks of the drafting pre-examination stage are:
a. Prepare the draft verification procedure (draft for comments), error analysis and its preparation instructions, b. Carry out verification work,
C. Pre-examine the draft verification procedure (draft for comments). 2.1.1 Drafting
The drafting of the draft verification procedure (draft for comments) shall comply with the provisions of Part II of this standard. The drafting of the preparation instructions shall comply with the provisions of Article 5.1 of this standard. The drafting of the error analysis shall comply with the provisions of Article 5.2 of this standard. 2.1.1.3
2.1.2 Verification
Necessary verification work should be carried out on the verification principles and methods in the draft verification regulations (draft for comments), and a verification report should be written to put forward conclusive opinions on the verification content. 2.1.3 Preliminary review
During the preliminary review stage, the organizer shall organize relevant personnel to conduct preliminary review of the draft verification regulations (draft for comments).
Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on March 20, 1989, and implemented on March 25, 1989
2.1.3.1 Preliminary review form
Generally, the following two forms are adopted
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a. Letter review: After the drafting work is completed, the organizer will send the draft verification regulations (draft for comments), preparation instructions, error analysis and other relevant materials to relevant units for comments. The time for letter review is generally 1 month to 1.5 months, and the letter review unit should respond within the specified time limit. b. Convene a preliminary review meeting.
2.1.3.2 Handling of opinions
After the preliminary review, the organizer shall summarize, organize, analyze and study the preliminary review opinions, list the summary table of opinions, and modify and supplement the draft regulations and other documents, propose the draft regulations for review, and write the minutes of the preliminary review meeting or the letter review conclusion.
2.2 Approval stage
After the preliminary review work is completed, the organizer shall submit the draft verification regulations (draft for review) and its preparation instructions and other relevant materials to the Secretariat of the Verification Regulations for Electronic Instruments of the Ministry of Machinery and Electronics Industry. The Secretariat shall make suggestions for joint review or letter review to the chairman according to the specific circumstances. 2.2.1 Review content
2.2.1.1 Whether the verification principle, verification method and error analysis in the draft regulations (draft for review) are correct and practical, whether the technology is advanced, whether the economy is reasonable, and whether the content is complete. 2.2.1.2 Whether the draft regulations (draft for review) comply with the provisions of the relevant laws and regulations such as the Metrology Law of the People's Republic of China.
2.2.1.3 Whether the draft regulations (draft for review) are compiled in accordance with the provisions of the second part of this standard. 2.2.2 Review
2.2.2.1 One month before the review meeting, the Secretariat shall send the draft verification regulations (draft for review), preparation instructions and attachments to the members of the Review Committee together with the meeting notice. 2.2.2.2 According to the requirements of Article 2.2.1, the draft regulations (draft for review) that have been reviewed and approved shall be filled in the form of the approval form L (see Appendix A (Supplement)], and the draft regulations that have not passed the review shall be subject to specific handling opinions by the Regulation Review Committee. 2.2.3 Letter review
2.2.3.1 Necessary documents for letter review
Necessary documents for letter review include:
a. Official document for letter review: The official document for letter review shall be accompanied by the letter review unit and the draft (submitted for review) letter review opinion form of the verification procedure for measuring instruments (format see Appendix B (supplement), b. Draft (submitted for review) of verification procedure
c. Preparation instructions of the draft (submitted for review) of verification procedure, error analysis, test report, opinion summary form, preliminary review meeting minutes or preliminary letter review introduction,
d. Other relevant documents.
2.2.3.2 Deadline for letter review
The letter review period is generally two months. Participants in the letter review shall fill in the procedure review opinion form within the specified time and send it back to the Secretariat of the Verification Procedure Review Committee in time. If no position is expressed after the deadline, it shall be deemed as consent. 2.2.3.3 Handling of letter review results
|The Secretariat will summarize the opinions received, list the summary of the opinions, and write the conclusions. After reviewing the current draft of the verification procedure (draft for review), fill in the approval letter. For the draft for review that has not passed, the Secretariat will put forward specific handling opinions.
2.3 Sorting out and submitting for approval stage
2.3.1 The draft verification procedure (draft for review) that has been reviewed and approved by the Verification Procedure Review Committee will be sorted out by the Secretariat or the sponsor to form the verification procedure draft (draft for approval). 2.3.2 The Secretariat or the sponsor will organize the preparation instructions and the summary of opinions and other relevant materials. 2.3.3 The Secretariat will draft the approval report and submit it to the Ministry of Machinery and Electronics Industry for approval and release. 3 After the preliminary review of the necessary materials for the submission of the draft verification procedure (draft for review) is completed, the sponsor must submit it to the Verification Procedure Review Committee. The following materials shall be submitted to the Secretariat of the meeting. Incomplete materials will not be accepted.
a. Three copies of the report for review,
b. Ten copies of the preliminary review meeting minutes or preliminary review conclusions of the draft verification procedures (draft for comments):
Ten copies of the draft verification procedures (draft for review); c.
d. Instructions for the preparation of the draft for review: Ten copies,
Error analysis in ten copies,
Verification report in ten copies!
9. Ten copies of the summary table of opinions on the draft verification procedures (draft for review). The necessary materials for submitting the draft verification procedures (draft for approval) for approval are the report for approval in three copies:
Three copies of the approval letter,
Three copies of the draft verification procedures (draft for approval): c.
Instructions for the preparation of the draft for approval In triplicate;
Error analysis in triplicate:
Verification report in triplicate,bzxZ.net
9. Summary of comments on the draft for approval in triplicate. 5 Requirements for the preparation of relevant materials
5.1 Preparation instructions
The preparation instructions are records of the analysis and demonstration of the main contents of the draft verification procedures from a technical perspective during the preparation process of the draft verification procedures, which serve as one of the main bases for the approval of the draft verification procedures. The preparation instructions for the draft verification procedures should include the following contents:
a, the source of the task,
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b. The preparation process, including the drafting and pre-examination process, focuses on the introduction of the participating drafting units and personnel, what problems have been solved, the pre-examination conclusions and the remaining problems, c. The basis for the preparation of the procedures and the analysis of the scope of application, d. The main technical issues that need to be explained in the preparation process, including verification items, verification points, verification methods, verification status and verification cycle, etc.,
e. The process and basis for handling major disagreements during the preparation process, f, other matters that should be explained.
5.2 Error analysis report
a. Overview
b. Error source and error synthesis (refers to the error caused by the calibration system when the metrological instrument is calibrated according to the calibration procedure)
c. Conclusion
Compare the comprehensive error obtained through error analysis with the allowable error of the metrological instrument to see whether it meets the requirements. d. Appendix
Includes references and other contents.
5.8 Verification report
Verification is to verify whether the verification principle and verification method of the draft verification procedure are correct and feasible. The content of the verification report should include a.
Test location, time, environment and measurement personnel, verification purpose;
C. The name, model and technical indicators of the verification equipment, d. Verification data,
e. Verification result analysis and conclusion.
5.4 Summary of opinions
The format of the summary of opinions is as follows:
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5.5 Minutes of the preliminary review meeting of the draft verification regulations (draft for comments) 5.5.1 Overview
State the name of the meeting, the start and end time, the location, the host unit and the host of the meeting, the units and number of people invited to the pre-examination meeting, and the units and number of people who actually attended the meeting. 5.5.2 Modification opinions on the main technical contents of the draft regulations (draft for comments). 5.5.3 Issues that cannot be reached through discussion and consultation and need to be reported to the verification regulations review committee for coordination or arbitration.
5.5.4 Pre-examination conclusion.
5.5,5 Other issues that need to be explained.
5.5.6 Annex: List of units and personnel (including positions) who attended the pre-examination meeting. Part II Rules for writing verification regulations for measuring instruments 6 Basic requirements for writing verification regulations
6.1 The writing of verification regulations should implement relevant laws and regulations such as the National Metrology Law. 6.2 The technical content of the verification regulations should be correct and feasible, and its text expression should be accurate, concise and easy to understand. 6.3 The terms and symbols in the same procedure should be consistent. The names and symbols of measurement units, physical quantity names and symbols, measurement terms and other names and symbols should comply with relevant national regulations. 7 The composition and writing order of verification procedures
Cover, pages, table of contents
7.2 Text of verification procedures
a. Scope of application,
b. Overview,
Technical requirements,
Verification conditions:
Verification items and verification methods,
f. Processing of verification results and verification cycle. 7.3 Supplementary content (including appendix)
8 Requirements for the preparation of each component of the verification procedure8.1 Cover and fan pages
The cover and fan pages of the verification procedure shall comply with the provisions of Appendix C (Supplement) "Verification Procedure Cover Format", Appendix D (Supplement) "Verification Procedure Bottom Page Format" and Appendix E (Supplement) "Verification Procedure Back Page Format".
8.2 Table of Contents
When the content of the verification procedure is long and there are many articles, a table of contents should be prepared. Write out the main division units of the article and Appendix 6
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number, title and page number. The writing method of the month should comply with the provisions of Appendix F (Supplement). 8.3 Applicable Model Diagram
This part does not have a title or serial number. Its content mainly describes the scope of application of the verification procedure. 8.4 Overview
Mainly briefly describe the purpose, principle and structure of the measured instrument. 8.5 Technical requirements
Focus on stipulating the metrological performance, safety of use and other related contents of the measured instrument. 8.6 Verification conditions
8.6.1 Environmental conditions
Determined according to the specific requirements of the measured instrument and the verification equipment. If there are no special requirements, the environmental conditions shall be as follows:
Environmental temperature: 20±2℃, 23±2℃ or 25±2℃, relative humidity: 45%~75%,
Atmospheric pressure: 86106kPa,
AC power supply voltage: 220V±2%
AC power supply frequency: 50Hz±1%!
Surrounding environment: Avoid external electromagnetic interference, others.
8.6.2 Verification equipment
Verification equipment refers to standard instruments and auxiliary equipment for verification, and the relevant technical indicators and reference models should be stated. 8.7 Verification items and verification methods
8.7.1 Verification items are items that must be verified in order to verify whether the main technical performance of the inspected measuring instruments meets its technical requirements. The determination of the inspected items should be based on reality and be feasible. 8.7.2 Verification methods are specific methods and steps that must be followed to complete the verification items. Its content should include the selection of verification points, the provisions of verification status, the reading of values and data processing, etc. The determination of verification methods must have a theoretical basis, and the verification steps should be simple, clear and feasible. 8.8 Processing of verification results and verification cycle
8.8.1 Processing of verification results refers to the conclusion made on whether the inspected measuring instruments are qualified after the verification is completed. The verification result clauses are written as follows:
For measuring instruments that pass the verification, a verification certificate shall be issued; for measuring instruments that fail the verification, a verification result notice shall be issued, and the unqualified items shall be indicated.
8.8.2 Verification cycle
The verification cycle refers to the time interval between two consecutive verifications of the inspected measuring instruments. The length of the verification cycle shall be determined based on many factors such as the performance, operating environment conditions and frequency of use of the inspected measuring instruments. Since there are many factors that affect the verification cycle, the provisions on the verification cycle of measuring instruments in the verification regulations generally only stipulate the longest verification cycle. The verification cycle clauses are written uniformly as follows:
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The verification cycle is X years, and it can be sent for inspection at any time when necessary. 8.8.3 Appendix
According to the needs, the verification regulations can have several appendices, and their contents generally include: a, verification certificate,
b, format of verification record sheet,
c recommended verification method,
d. Explanation and supplement of the technical content of the main text of the verification regulations. Introduction and explanation of other relevant technical contents. 9 Division, numbering and arrangement format of chapters, sections, articles, clauses and items of the verification regulations 9.1 Division and numbering of chapters, sections, articles, clauses and items of the verification regulations The verification regulations are divided into several chapters, sections, articles, clauses and items for description according to their contents. According to the complexity of the contents of the regulations, they can be adopted in full or in part, but the articles must be numbered. The numbers are: "Chapter" numbering is represented by one, two, three... "Section" numbering is represented by (one), (two), (three)... "Article" numbering is represented by 1, 2, 3. In the main text of the regulations, each article should be numbered consecutively. "Clause" is the sequential unit under the clause. Its number is represented by 1.1, 1.2, 1.3, 2.1, 2.2, 2,3...…. "Item" is the sequential unit under the "clause". Its number is represented by 1.1.1, 1,1.2, 1.1.3... The numbering sequence of chapters, sections, articles, clauses and items in the verification regulations is shown in Appendix G (Supplement). 9.2 Arrangement of chapters, sections, articles, clauses and items 9.2.1 "Chapter" should have a title. Its number and title should be located in the center of the page and occupy a separate line. There should be a space between the number and the title.
9.2.2 "Section" should have a title. Its number is located at the left end of the page and is separated by two spaces. There is a space between the number and the title, and no period is added after the number.
9.2.3 The number of the article, clause and item shall be written from the left end of the page with two spaces between them. If there is a title, it shall occupy a single line, with one space between the number and the title, and no period shall be added after the number. If there is no title, the specific content shall be written with one space between the number.
The arrangement format of chapters, sections, articles, clauses and items of the verification regulations is shown in Appendix H (Supplement). 10 The method of reaching drawings, tables, formulas and notes in the verification regulations 10.1 Drawings of the verification regulations
10.1.1 The drawings and graphic symbols of the verification regulations shall comply with the provisions of relevant national standards. 10.1.2 If there are more than two drawings in the same verification regulation, the drawing numbers shall be marked continuously, such as Figure 1, Figure 2 and Figure 3. If necessary, the name of the drawing shall be written after the drawing number, and there shall be one space between the two. The drawing number and the name of the drawing shall be written in the center below the drawing.
10.2 Verification Procedure Tables
10.2.1 The tables in the verification procedures should generally be arranged near the relevant provisions. In the same procedure, if there are more than two tables 8-
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, the serial number of the table should be written, such as Table 1, Table 2, Table 3. If necessary, the table name can be written after the table number. The table number is written in the upper left corner of the table with two spaces in front, and the table name is written in the center of the top of the table. 10.2.2 If the parameters in each column of the table use the same measurement unit, the unit should be written in the upper right corner of the table with two spaces in the back. If the measurement units of each column are different, the units should be written below or to the right of the parameter name in each column and marked. If adjacent parameters use the same measurement unit, they can be combined and written in their common unit column. The symbols or words "same as above" or "same as left" shall not appear in the table. The decimal points of the values in the table should be aligned. When there is no content in some columns in the table, they are represented by a short horizontal line.
The table number, name, measurement unit, and data writing method are shown in Table 1 and Table 2. Table 1
Range (mH)
Standard inductance and its operating frequency
Nominal value of standard inductance
100μH
1000μH
Operating frequency (kHz)
10.2.3 When the table is not completed due to space limitations on this page and is continued on the next page, the lower part of the table is closed with a thin solid line. The upper left corner of the continued table should be written "Continued table ×". The header of the continued table shall not be omitted. 10,3 Expression of formulas in verification regulations Formulas in verification regulations should be written in the middle of the page, and the symbols and unit of measurement in the formulas should be written below Formula 9—
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. If there are more than two formulas in the same regulation, they should be numbered in sequence with Arabic numerals in brackets after the formulas, and the numbers of the formulas in the entire regulation should be continuous. For example: The calculation formula for the relative error 8f of the signal source frequency of=f-fo×100%
Where: f--indication of the signal source frequency (MHz) fo--indication of the standard meter (frequency meter) (MHz). 10.4 Expression of "Notes" in Verification Regulations 10.4.1 "Notes" should be avoided as much as possible in verification regulations. If a certain content in an individual article or chart does need to be explained, the note should be added below the relevant article, clause, item and chart, and written on a new line with two spaces from the left. 10.4.2 If there are two or more notes in the same article, figure or table, a colon should be added after the word "Note", and then the notes should be numbered in sequence (1), (2), (3). If there is only one note in the same place, a colon should be added after the word "Note", followed by the content of the note.
Each note should be written separately, and when moving to another line, it should be aligned with the position where the text was started. 10.4.3 For notes on numbers or symbols in figures or tables, an asterisk "" should be made in the upper right corner of the marked object, and the content to be annotated should be written at the bottom of the same page as the asterisk, and a thin solid line should be drawn on the left side of the page to separate it from the article. The length of the thin solid line is about one-fourth of the width of the page. The “*” is written with two spaces between it from the left end. If there are more than two notes on the same page, different numbers of asterisks are used to represent them, such as “”, “*”, “*”·”. 11 Methods of writing numerical values and rules for rounding numerical values in verification procedures 11.1 Methods of writing numerical values
11.1.1 The data in the procedures shall all be written in Arabic numerals, but the numerals in sentences such as “twice”, “three points”, and “five years”, among which “two”, “three”, and “five” can be written in Chinese numerals as usual. 11.1.2 When writing decimals, the “0” before the decimal point must be written, for example, 0.35, 0.05. 11.1.3 All the significant digits of the numerical value should be written out. For example, the number series with 3 significant digits, 1.50, 2.75, 2.00, should not be written as 1.5, 2.7, 2.
11.1.4 When the number has many digits, such as an integer with more than three "0"s after it, or a pure decimal with more than three "0"s after the decimal point, it can be written by multiplying by 10 (Ⅱ is a positive or negative integer), but all the "0"s in the effective digits must be written out. For example, it is clear that the number 120000 has three effective digits, so it should be written as 120×10, and cannot be written as 12×10* or 1200×10. 11.1.5 The values indicating deviation ranges are written as follows: 20±2℃ (not written as 20℃+2℃)
5012mA (not written as 50mA+2mA)
11.1.6 The values indicating the range of parameters are written as follows: 2×103~3×10* (23× 10)
45%~75%
—10-
5~15mA
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11.1.7 When there is a series of values in the same unit of measurement in the verification regulations, the unit symbol can be listed only after the last number.
For example: 2.5, 6.4, 10.0, 12.0, 15.5mV. 11.2 Rules for rounding off values
11.2.1 When the various measurements and calculations in the verification regulations need to be rounded off, the following rules should be followed: a
If the last digit of the retained number is used as the unit, and the number after it is greater than 0.5, then add 1 to the last digit: b,
If the last digit of the retained number is used as the unit, and the number after it is less than 0.5 , the last digit remains unchanged, c.
If the last digit of the retained number is taken as the unit, and the number after it is exactly 0.5, then the last digit is increased by 1 when it is an odd number, and the last digit remains unchanged when it is an even number (including "o"). For example: retain three significant digits:
Before rounding
After rounding
2.14
11.2.2 For the value of the error, if the last digit of the retained number is taken as the unit, no matter how large the number after it is (except 0), the last digit is increased by 1.
For example: Before rounding
12 Expression method of appendix to verification procedures
After rounding
12.1 The appendix in the verification procedures should be written on a separate page, and the word "Appendix" should be written in the center above the first page of the appendix, occupying a single line. The page number of the appendix is continuous with the page number of the main text. 12.2 If there are more than two appendices in the same regulation, Arabic numerals shall be used for sequential numbering, such as Appendix 1, Appendix 2, and Appendix 3, and shall be written at the top left of the top page of each appendix. Each appendix shall be written on a separate page. The articles, charts, formulas, etc. in the appendix shall be numbered separately in each appendix, and the numbering method shall be the same as that of the main text. If the appendix has a title, the title shall be written in the center of the line below the appendix number. 13 Termination symbol of verification regulations5, then the last digit is an odd number and is increased by 1, and the last digit remains unchanged when it is an even number (including "o"). For example: retain three significant figures:
before rounding
after rounding
2.14
11.2.2 For the numerical value of the error, if the last digit of the retained digit is used as the unit, the last digit is increased by 1 regardless of the size of the subsequent digit (except 0).
For example: before rounding
12 Expression method of appendix of verification regulations
after rounding
12.1 The appendix in the verification regulations should be written on a separate page, and the word "Appendix" should be written in the center above the first page of the appendix, occupying a single line. The page number of the appendix is continuous with the page number of the main text. 12.2 If there are more than two appendices in the same regulation, they are numbered in Arabic numerals in sequence, such as Appendix 1, Appendix 2, and Appendix 3, and are located at the top left of the top page of each appendix. Each appendix should be written on a separate page. The articles, diagrams, formulas, etc. in the appendix should be numbered separately in each appendix, and the numbering method is the same as the main text. If the appendix has a title, the title should be written in the center of the line below the appendix number. 13 Termination symbol of the verification procedure5, then the last digit is an odd number and is increased by 1, and the last digit remains unchanged when it is an even number (including "o"). For example: retain three significant figures:
before rounding
after rounding
2.14
11.2.2 For the numerical value of the error, if the last digit of the retained digit is used as the unit, the last digit is increased by 1 regardless of the size of the subsequent digit (except 0).
For example: before rounding
12 Expression method of appendix of verification regulations
after rounding
12.1 The appendix in the verification regulations should be written on a separate page, and the word "Appendix" should be written in the center above the first page of the appendix, occupying a single line. The page number of the appendix is continuous with the page number of the main text. 12.2 If there are more than two appendices in the same regulation, they are numbered in Arabic numerals in sequence, such as Appendix 1, Appendix 2, and Appendix 3, and are located at the top left of the top page of each appendix. Each appendix should be written on a separate page. The articles, diagrams, formulas, etc. in the appendix should be numbered separately in each appendix, and the numbering method is the same as the main text. If the appendix has a title, the title should be written in the center of the line below the appendix number. 13 Termination symbol of the verification procedure
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