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JY/T 0185-2011Metal mesh cover (English PDF)

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Issued by

Ministry of Education of the People's Republic of China

Level / Type

National · Recommended

Issue date

July 11, 2013

Implementation date

July 11, 2013

Scope

JY/T 0185-2011 (Metal mesh cover) is available as an English-translated PDF.

JY/T 0185-2011 - This standard specifies the nomenclature, requirements, test methods, inspection rules, signs, instructions for use, packaging, transportation, and storage of metal mesh covers.

This standard applies to metal mesh covers for physics teaching in middle schools.

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Document preview — JY/T 0185-2011

National Standard of the People's Republic of China

ICS: 03.180
Classification: Y51

Issued by: Ministry of Education of the People's Republic of China

Foreword
1 Scope
2 Normative references
3 Model designation
3.1 Model Nomenclature
3.2 Nomenclature
4 Requirements
4.1 Working environmental conditions
4.2 Product structure and appearance
4.3 Net cover
4.4 Connectors and connecting rods
4.5 Base
4.6 Base Insulation Performance
4.7 Environmental test
5 Test method
5.1 Visual and structural inspection
5.2 Dimensions
5.3 Insulation performance test
5.4 Environmental test
6 Inspection rules
6.1 Inspection classification
6.2 Inspection items
7 Environmental test 4.7--
8 Signs, instructions, packaging 7 -

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces JY 185-1985. In addition to editorial changes, the main technical requirements of this standard have changed as follows.

-Added specific regulations on connecting rods, metal balls and metal chains;

-Increased the requirements for base insulation performance;

-Added environmental tests.

Please note that some content of this standard may involve patents, and the issuing authority of this standard is not responsible for identifying these patents.

This standard was proposed by the National Technical Committee for Standardization of Teaching Instruments (SAC/TC125).

This standard is under the jurisdiction of the National Technical Committee for Standardization of Teaching Instruments (SAC/TC125).

1 Scope

This standard specifies the nomenclature, requirements, test methods, inspection rules, signs, instructions for use, packaging, transportation, and storage of metal mesh covers.

This standard applies to metal mesh covers for physics teaching in middle schools.

2 Normative references

The 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.

JY 0001-2003 General quality requirements for teaching instruments and equipment products JY 0002 Inspection rules for teaching instruments and equipment products JY 0009-1990 Environmental requirements and test methods for electronic equipment for teaching JY 0026-1991 teaching instrument and teaching equipment product model naming method

3 Model designation

3.1 Model Nomenclature

The model name of the product is in accordance with JY 0026-1991.

3.2 Nomenclature

The metal mesh cover is named.

D - WZ - B - 220

Product main parameters, diameter, unit. mm Product feature code, weaving Product name Pinyin prefix, mesh cover Product model classification code, special equipment for electromagnetics Model example.

D-WZ-B-220 stands for metal net cover, made of braid, 220mm in diameter, special instrument for electromagnetics.

4 Requirements

4.1 Working environmental conditions

4.1.1 Working temperature. -10 °C ~ 40 °C.

4.1.2 Relative humidity. not more than 80% RH (40 ° C).

4.2 Product structure and appearance

The metal mesh cover shall consist of four parts. the mesh cover, the connector, the connecting rod and the insulating base. Product structure and appearance quality requirements should meet JY Chapters 6 and 7 of 0001-2003.

4.3 Net cover

4.3.1 The net cover diameter shall not be less than 220mm, and the height shall not be less than 280mm.

4.3.2 The mesh cover shall be woven with wire not less than 0.6mm in diameter, and the mesh diameter shall not be greater than 5mm.

4.3.3 The surface of the net cover should be round, the tip of the metal wire should not be exposed, the skeleton should be straight, the support should be reliable, and the edge of the net mouth should be neat and smooth.

solid. The elbow should be clamped tightly and not loose. The end of the mesh should be retracted into the net and should not be exposed.

4.4 Connectors and connecting rods

The nut on the connector should be locked with the upper opening of the net cover, and it should be firm and reliable. The connector should have set screws to fix the connecting rod and connect There shall be a metal ball on the upper end of the rod, and the ball diameter shall not be less than phi 15mm. There should be a metal chain at the lower end, and the metal chain should be adjustable to a distance from the base surface.

More than 100mm. The adjustment range of the connecting rod should not be less than 30mm.

4.5 Base

4.5.1 The paint on the surface of the iron base shall be uniform and smooth without scratches and peeling.

4.5.2 The base should be connected to the insulation rod, the upper end of the insulation rod should be connected to the metal disc, the insulation performance of the insulation rod should comply with 4.6, and the insulation rod should be it is made of materials with insulation performance not lower than plexiglass. The connection between the rod and the base and the disc should be firm and free of looseness.

4.5.3 The diameter of the metal disc should not be less than 240mm, and the surface of the metal material should be electroplated without scratches.

4.5.4 The height of the base should not be less than 120mm.

4.6 Base Insulation Performance

A gold foil electroscope should be used as a test tool at a relative humidity of 75% to 80%.

Place the gold foil electroscope on the base, make the gold foil electroscope charged, and the opening angle is greater than 30 °. The opening angle of the foil in 20s should not be visible Variety.

4.7 Environmental test

Should be able to withstand the humidity storage test and transport test items according to JY 0009-1990.

5 Test method

5.1 Visual and structural inspection

Visual inspection and sensory inspection of appearance and structure shall comply with 4.3.3, 4.4, 4.5.1, 4.5.2, 4.5.3.

5.2 Dimensions

Product related dimensions require a micrometer with a division value of 0.01mm, a vernier caliper with a division value of 0.02mm or a steel straight with a division value of 1mm.

Ruler measurement should meet the requirements of 4.3, 4.4, and 4.5.

5.3 Insulation performance test

Under the condition of relative humidity of 75% to 80%, the iron parts of the base are grounded, and the metal disc parts and the gold foil electroscope are connected by wires.

The metal balls are connected to make the disc and the gold foil electroscope charged, the opening angle is greater than 30 °, and there should be no visible change in the opening angle of the foil within 20s.

5.4 Environmental test

According to JY 0009-1990 4.6, 4.9 humidity and transportation test related requirements. Humid storage conditions. The temperature is 40 ° C and the relative humidity is 90%.

The storage time is 4h, and the recovery time is 4h. Should comply with 4.7.

6 Inspection rules

6.1 Inspection classification

The inspection of this product shall be divided into factory inspection, type inspection and quality supervision inspection.

6.2 Inspection items

The inspection items and inspection methods for factory inspection and type inspection shall conform to Table 1.

Table 1 Inspection items and methods of factory inspection and type inspection

Item No. Inspection Item Standard Provisions Factory Inspection Type Inspection

1 Appearance

4.3.3, 4.4, 4.5.1,

4.5.2, 4.5.3

2 Dimensions 4.3, 4.4, 4.5

3 Net cover structure 4.3 -

4 Connectors, connecting rods 4.4 -

5 Base 4.5 -

6 Insulation performance 4.6 -

7 Environmental test 4.7--

8 Signs, instructions, packaging 7 -

Note. "-" in the table means all inspection items, "-" means sampling inspection items, and "-" means no inspection items.

6.3.1 The factory inspection shall be based on the natural batch of delivery, and the type inspection shall be based on the inventory array.

6.3.2 During the factory inspection, all the inspection items should be inspected first, and then samples should be taken from the qualified products for all inspection items, and the sampling inspection items should be inspected.

6.3.3 The samples for type inspection shall be taken from the products that passed the factory inspection.

6.3.4 The sampling methods for factory inspection and type inspection are in accordance with the relevant provisions of JY 0002.

6.4 Non-conformance determination

6.4.1 The determination of sampling inspection shall be in accordance with the relevant provisions of JY 0002.

6.4.2 The criteria for the failure of a single sample shall be in accordance with the relevant provisions of JY 0002.

6.4.3 The inspection of all inspection items shall be determined according to the unqualified criterion of a single sample.

6.4.4 In the requirements of this standard, 4.3.3 and 4.6 are the main performance indicators.

6.5 Review rules

6.5.1 Unqualified batches and products can be submitted for inspection again after rework.

6.5.2 If the cause of the batch failure is a sampling inspection item, the item shall be changed to a full inspection during the re-inspection.

6.6 Quality supervision inspection Quality supervision and inspection shall be in accordance with the relevant provisions of JY 0002.

7 Signs, instructions for use, packaging, transportation and storage

7.1 Signs and instructions should comply with the provisions of Chapter 11 of JY 0001-2003.

7.2 Packaging, transportation and storage should comply with the provisions of Chapter 12 of JY 0001-2003. The product should be sealed with plastic bags, and the packaging box should have sufficient strength, and its outer surface should be marked "Afraid of wet" sign.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 4 pages — is available in the English PDF.

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