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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. JY/T 0509.1-2019: Teaching ruler - Part 1: Demo straight ruler Status: Valid
Basic dataStandard ID: JY/T 0509.1-2019 (JY/T0509.1-2019)Description (Translated English): Teaching ruler - Part 1: Demo straight ruler Sector / Industry: Education Industry Standard (Recommended) Classification of Chinese Standard: Y51 Word Count Estimation: 7,711 Date of Issue: 2019-04-08 Date of Implementation: 2019-09-01 Older Standard (superseded by this standard): JY 168-1984 Regulation (derived from): Natural Resources Department Announcement No. 7 of 2019 Issuing agency(ies): Ministry of Education of the People's Republic of China JY/T 0509.1-2019: Teaching ruler - Part 1: Demo straight ruler---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.(Teaching ruler Part 1. Demonstration ruler) ICS 03.180 Y 51 Education Industry Standard of the People's Republic of China Replacing JY/T 168-1984 Teaching ruler part 1. ruler for demonstration Teaching ruler--Part 1. Demo straight ruler Published on April 04,.2019 2019--09--01 Implementation Published by the Ministry of Education of the People's Republic of China JY ForewordThis section is drafted in accordance with the rules given in GB/T 1.1-2009. JY/T 0509 "The Teaching Ruler" is divided into three parts. -Part 1. Demonstration ruler; -Part 2. Ruler; -Part 3. Tape measure. This part is the first part of JY/T 0509. This section replaces JY/T 168-1984 "Demonstration meter". Compared with JY/T 168-1984, except for editorial changes, the main technical changes It is as follows. -Modify the "stuck feet" to indicate a wireframe (see 4.1, 1.2 of the 1984 version); -Added specific requirements for indicating wireframes (see 4.3); -Increased the digital height requirement of the ruler (see 4.2.3); -Increase the allowable error of the external dimensions (see 4.2.2); -Added specific requirements for appearance and workmanship (see 4.5); -Added environmental test items (see 4.6); -Added the content that the wooden ruler should have Baotou on both ends (see 4.2.2); -Removed the limitation of the material of the ruler body (see 1.2 of the 1984 version). Please note that some of this section may involve patents. The issuer of this standard is not responsible for identifying these patents. This section is proposed by the Basic Education Department of the Ministry of Education of the People's Republic of China. This section is under the jurisdiction of the National Education Equipment Standardization Technical Committee (SAC/TC 125). This section was drafted. Beijing Educational Technology Equipment Center. The main drafter of this section. He Zhi. This section replaces JY/T 168-1984. This part replaces the previous versions of the standard. --JY/T 168-1984. Teaching ruler part 1. ruler for demonstration1 ScopeThis section specifies the model designation, requirements, test methods, inspection rules, and marking, packaging, transportation, and storage of rulers for teaching demonstration. Save. This section applies to rulers with instruction wireframe for teaching demonstration.2 Normative referencesThe following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GB/T 2410-2008 Determination of light transmittance and haze of transparent plastics GB/T 2828.1-2012 Counting sampling inspection procedures. Part 1. Sampling plan for batch inspection inspection according to acceptance quality limit (AQL) GB 24613-2009 Hazardous substances limit for coatings for toys JY/T 0001-2003 General quality requirements for teaching instruments and equipment products JY/T 0002 Inspection rules for teaching instruments and equipment products JY/T 0026-1991 teaching instrument and teaching equipment product model naming method JY/T 0213-1994 Teaching mechanics, thermal instrument transportation, storage environmental conditions and test methods3 Model designation3.1 The naming rules are in accordance with the provisions of JY/T 0026-1991. 3.2 Model Nomenclature The model of the demonstration ruler is named. L-JY ZC-M/S/L-1000 Product specifications, length 1000, unit is millimeter (mm) Product feature code, wood or plastic or aluminum alloy Product name Pinyin prefix, "Demonstration Ruler for Teaching" Product model classification code, special instrument for mechanics Model example. L-JY ZC-M-1000 represents a special instrument for mechanics, teaching demonstration ruler, wooden, length 1000 mm.4 Requirements4.1 Product composition The demonstration ruler shall consist of a ruler body and an indication wire frame. 4.2 Ruler 4.2.1 Materials The demonstration ruler can be made of wood, plastic or aluminum alloy. 4.2.2 Dimensions 4.2.2.1 The length of the ruler shall be 1000 mm ± 2 mm, and the ruler width shall be 45 mm ± 1 mm. Plastic and wooden rulers have a thickness of 8 mm ± 0.2 mm. The working end surface of the ruler shall be the starting point and the end point of the scale line, and a metal toe shall be added to both ends of the wooden ruler. 4.2.2.2 The dimensions of the aluminum alloy ruler shall meet the bending strength requirements. Put the aluminum ruler up and apply a force of 4.9 N perpendicular to the ruler in the middle of the ruler with a length of 900 mm. The middle of the ruler should not fall more than 2 mm. 4.2.3 Graduation lines and numbers There should be graduation lines on both sides of the ruler. The minimum division is 1 cm, every 5 cm is represented by a line of 20 mm length, and every 1 cm is represented by a line of 15 mm length. The line width of the long and short lines is 1.5 mm ± 0.2 mm. The difference between the line widths of the same ruler should not be greater than 0.2 mm. The indexing line should reach the ruler edge vertically, and it should be even and clear. There should be no heavy lines, missing lines or broken lines exceeding the width of the lines. The two sides of the ruler body should be marked with a number every 10 cm, one side of the number should be horizontal, and the other side should be vertically. The numbers should be arranged neatly, the font should be bold, and the font height should not be less than 18 mm. The minimum scale should be marked at the beginning of the ruler The unit of degree is "cm". 4.2.4 Error of graduation line The cumulative error of the graduation line within any 10 cm should not exceed 1 mm, and the cumulative error of the full length should not exceed 2 mm. 4.2.5 Color The ruler body should be white, the graduation line should be black, and the number should be red. 4.2.6 Shape Error of Ruler The flatness of the ruler shall not be greater than 3 mm, and the straightness of the ruler shall not be greater than 2 mm. 4.3 Indication Wireframe 4.3.1 The width of the indicated wire frame shall be 36 mm to 42 mm, the thickness shall not be less than 1 mm, and the corners shall be rounded. The middle of the wireframe should be marked in red Indication line, line thickness is 1.5 mm and length is 45 mm. 4.3.2 A spring leaf or other device shall be placed where the indication wire frame contacts the edge of the ruler, so that the indication wire frame cannot slide freely and is parallel to Pull the indicating wire frame in the direction of the ruler body between 0.5 N and 1.5 N. 4.3.3 The indication wire frame should adopt a structure that cannot be easily removed from the ruler. 4.3.4 The indication wire frame shall be made of non-brittle materials. 4.3.5 When the indication wire frame is made of transparent material, it should be colorless and transparent, and the light transmittance should not be less than 90%. 4.4 Requirements for materials and coatings using wood and plastic 4.4.1 When using wood, it should be made of logs, and each side of the ruler should be coated with paint, and the content of harmful substances in the coating should meet GB 24613-2009 Chapter 4. The moisture content of wood is 6.28 in JY/T 0001-2003. 4.4.2 When plastics are used, they should be made of non-brittle materials such as engineering plastics. 4.5 Appearance and workmanship 4.5.1 The surface of the ruler shall be smooth, flat, and consistent in color. The wooden ruler should be evenly painted, flat and clean, free of mildew, insect eyes, dead knots, resin paint (mingzi), and there should be no bumps, cracks, or insects. Pheasants, scars, burrs, sharp edges, etc. The surface of the plastic ruler should be smooth and clean, there should be no obvious spots, scratches, and bubbles, and the ruler body should not have cracks; the ruler edge should be smooth and not chipped. The surface of the aluminum alloy ruler should be treated with matt oxidation. 4.5.2 The surface of the instruction wire frame should be flat and clean, without scratches, dissolving marks, shrinkage marks, air bubbles, powder, and pinching, and edges Burrs, deformation, broken edges, and unevenness should have no gates or flashes. 4.5.3 The front of the ruler shall be marked with the name or trademark of the manufacturer. 4.5.4 The rest shall comply with 6.26, 6.27, 6.28, 7.4.1, 7.4.2, 7.4.3, 7.4.4, 7.6, 7.7, JY/T 0001-2003 Requirements of 7.8, 7.11. 4.6 Environmental test 4.6.1 When wood is used as the material, the humidity environment test shall be carried out according to the requirements in Table 2 of 3.1 of JY/T 0213-1994. 4.6.2 When plastic is used as the material, the temperature environment test and tilt drop test shall be carried out in accordance with the requirements of Table 2 in 3.1 of JY/T 0213-1994. Check.5 Test method5.1 Length Under the reference conditions stipulated by JY/T 0213-1994, the time for the indoor temperature of the ruler and the calibration tool to be in the room should not be less than 3 hours. Use a steel ruler with a 0.02 mm vernier caliper and a 1 mm graduation to measure the general dimensions. The line width was measured with a reading microscope. Should Meet the requirements of 4.2.2, 4.2.3, 4.2.4, 4.3.1. 5.2 Bending strength of aluminum alloy ruler Set up both ends of the aluminum ruler (the separation distance is 900 mm), put a weight of 500 g in the middle of the 900 mm long ruler, and use The radius of the vernier caliper measuring scale with a division value of 0.02 mm shall comply with 4.2.2. 5.3 Ruler Shape Error The flatness and straightness of the ruler surface measured on the platform (or using a flat ruler) and feeler gauge shall comply with 4.2.6. 5.4 Wood moisture content test Tested with a wood hygrometer, the moisture content of the wood should comply with 4.4.1. 5.5 Indication wire frame pull force test Use a dynamometer with a division value of 0.1 N to measure the pulling force of the indicating wire frame in a direction parallel to the ruler body, which shall comply with 4.3.2. 5.6 Indication wire frame material transparency test The transparency performance test is in accordance with GB/T 2410-2008 7.1 (haze meter method) test. Simplified test method. with new colorless transparent organic glass Comparison of glass materials, sensory test. In case of dispute, the test in accordance with GB/T 2410-2008 7.1 (haze meter method) is used as the arbitration method. 5.7 Coating harmful substance test Determination of the limit of harmful substances in coatings shall be performed in accordance with GB 24613-2009 Appendix A, B, C, D, E. 5.8 Visual inspection Sensory test. 5.9 Environmental test According to JY/T 0213-1994 4.1 (temperature test) or 4.2 (humidity test), 4.5 (tilt drop test). After the test, the product should Does not deform or chip.6 Inspection rules6.1 Inspection classification The inspection of this product is divided into factory inspection, type inspection and quality supervision inspection. 6.2 Inspection items and inspection methods The inspection items and inspection methods for factory inspection and type inspection are shown in Table 1. Table 1 Inspection items and inspection methods for factory inspection and type inspection Serial number inspection content standard provisions factory inspection type inspection 1 Product Composition 4.1 ● ● 2 Dimension of ruler 4.2.2 ○ ● 3 Bending strength of aluminum alloy ruler 4.2.2 ○ ● 4 graduation lines and numbers 4.2.3 ● ● 5 Index line error 4.2.4 ○ ● 6 Color 4.2.5 ○ ● 7-foot shape error 4.2.6 ● ● 8 Indication wire frame size 4.3.1 ○ ● 9 Indicate the contact between wire frame and ruler 4.3.2 ● ● 10 Instruction wire frame structure 4.3.3 ○ ● 11 Instruction wire frame production materials 4.3.4 ○ ● Table 1 Inspection items and inspection methods for factory inspection and type inspection (continued) Serial number inspection content standard provisions factory inspection type inspection 12 Light transmittance of indicator wire frame surface 4.3.5 ○ ● 13 Moisture content of wood a 4.4.1 ○ ● 14 Limit of harmful substances in coatings 4.4.1 ○ ● 15 Plastic ruler material 4.4.2 ○ ● 16 Appearance and craftsmanship 4.5 ● ● 17 Environmental test 4.6-● Note. "●" in the table means full inspection for batch products, "○" means sample inspection for batch products, and "-" means no inspection. 6.3 Lot rules and sampling methods 6.3.1 The factory inspection shall be batched according to the natural batch of delivery, and the type inspection shall be batched according to the stock array. 6.3.2 When leaving the factory for inspection, inspect all the inspection items first, take samples from the qualified products of all inspection items, and inspect the items for sampling inspection. 6.3.3 The sampling method for factory inspection and type inspection is according to JY/T 0002. 6.4 Non-conformance determination 6.4.1 The failure criterion of a single sample is JY/T 0002. 6.4.2 The main technical indicators are the serial numbers 1, 3, 4, 6, 8, 9, and 11 in Table 1. 6.5 Review rules 6.5.1 Unqualified batches and products can be submitted for inspection again after rework. 6.5.2 The re-inspection of sampling inspection items shall be carried out in accordance with the transfer rules of 9.3 in GB/T 2828.1-2012, and intensified inspection shall be carried out once. The same scheme, the general inspection level III, AQL value is 2.5. 6.6 Quality supervision inspection Refer to type inspection. 7 Marking, packaging, transportation, storage 7.1 The ruler body shall be marked with a special measuring instrument for teaching demonstration, see Figure 1. Figure 1 Special marks for teaching demonstration special measuring instruments 7.2 The rest shall comply with Chapters 11 and 12 of JY/T 0001-2003. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of JY/T 0509.1-2019_English be delivered?Answer: Upon your order, we will start to translate JY/T 0509.1-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of JY/T 0509.1-2019_English with my colleagues?Answer: Yes. 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