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JY/T 0421-2011 English PDF

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JY/T 0421-2011: (Hot cathode ray tube demonstrator)
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Basic data

Standard ID JY/T 0421-2011 (JY/T0421-2011)
Description (Translated English) (Hot cathode ray tube demonstrator)
Sector / Industry Education Industry Standard (Recommended)
Classification of Chinese Standard Y51
Word Count Estimation 8,876
Date of Issue 2013-07-11
Date of Implementation 2013-07-11
Issuing agency(ies) Ministry of Education of the People's Republic of China

JY/T 0421-2011: (Hot cathode ray tube demonstrator)

---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.
(Hot cathode ray tube demonstrator) ICS 03.180 Y 51 Record number 46893-2014 Education Industry Standard of the People's Republic of China Hot cathode ray tube demonstrator Hot cathode-ray tube demonstrator 2013–07–11 Release 2013–07–11 Implementation Published by the Ministry of Education of the People's Republic of China JY JY/T 0421─2011

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. 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 and managed by the National Technical Committee for Teaching Instrument Standardization (SAC/TC 125). This standard was drafted. Hangzhou Jinfan Science and Education Instrument Co., Ltd., Yingkou Vocational and Technical College. The main drafters of this standard. Chen Xiaolin, Qin Xuling. Hot cathode ray tube demonstrator

1 Scope

This standard specifies the requirements, test methods, inspection rules and marks, instruction manuals, packaging, Transportation and storage. This standard is applicable to hot cathode ray tube demonstrators for teaching demonstration with tube-filled tube and dedicated tube with fluorescent screen.

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. GB 8898-2001 audio, video and similar electronic equipment safety requirements 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 0010 General technical requirements for marking, instruction, packaging, transportation and storage of electronic equipment JY 0026-1991 teaching instrument and teaching equipment product model naming method

3 Model designation

3.1 Method of Model According to JY 0026-1991, the model of hot cathode ray tube demonstrator is named. Z ― RS ― C ― 45 Product specifications, screen diameter 45mm Product feature code, Inflatable in tube Product name Pinyin prefix, hot cathode ray tube demonstrator Product model classification code, electronic special instrument Model example. Z-RS-Y-45 represents a 45 mm diameter tube-filled hot cathode ray tube demonstrator, a dedicated electronic instrument.

4 Requirements

4.1 Environmental conditions Ambient temperature. -10 ℃ ～ 40 ℃; Relative humidity. not more than 85% (RH). 4.2 Using power Should use AC 220V ± 22V, 50Hz ± 0.5Hz. 4.3 Main functions The hot cathode ray tube demonstrator should have the following functions. a) Demonstrate the deflection of the electron beam in the electric field (including deflection in both vertical and horizontal directions); b) demonstrate the deflection of the electron beam in a magnetic field; c) Observe the waveform of sinusoidal alternating current; d) Observe Li Sharu's figure (superposition of sine waves in vertical and horizontal directions); e) Show the track of the electron beam in the tube. 4.4 hot cathode ray tube 4.4.1 The visible diameter of the screen should not be less than 45mm. It is a special tube coated with phosphor and filled with inert gas in the tube. Electron beam track; there are two pairs of deflection plates, X and Y, the structure of the electron gun is visible. 4.4.2 When the brightness is adjusted to the brightest and the focus of the electron beam is optimized, the brightness of the electron beam trajectory and the focused spot of the phosphor screen should not be less than 4cd/m 2. 4.4.3 Adjust the acceleration voltage appropriately to optimize the focusing of the electron beam. The diameter of the light spot on the phosphor screen should not be greater than 3mm. 4.4.4 The instrument should be able to work normally after being warmed up for 5 minutes. 4.5 Deflection voltage The deflection voltage of the hot cathode ray tube in the horizontal and vertical directions should be continuously adjustable; the light point should be able to move out when the deflection voltage is adjusted to the maximum screen. 4.6 Waveform display Adjust the "scanning fine-tuning" knob, the instrument should be able to stably display a sine waveform of one or two cycles. 4.7 Phase adjustment The AC voltage phase between the input X deflectors should be continuously adjustable within the range of 0 ° ~ 165 °. 4.8 Security 4.8.1 The product shall meet the requirements for protection against electric shock of category I. Use single-phase three-pole power input socket to connect power. The protective ground in the instrument should be Reliable connection to the ground electrode of the power input socket. The cross-sectional area of the power cord should comply with the provisions of 16.2 in GB 8898-2001. 4.8.2 The electrical clearance and creepage distance of the product shall not be less than 3mm, and the electrical clearance and creepage distance of the printed board shall conform to GB 8898-2001 The provisions of 13.2. 4.8.3 Insulation resistance. Normally not less than 20M, and not less than 2M after humidity test. 4.8.4 Voltage test. The test voltage is 1500V AC voltage and the test time is 1min. There should be no flashover or breakdown. 4.9 appearance quality The appearance quality of the product should meet the relevant regulations of JY 0001. 4.10 Environmental test The environmental test items are temperature test, humidity test and vibration test. The test is in accordance with 4.5, 4.6 and 4.7 of JY 0009-1990. After the test, the product shall meet the requirements of 4.3, 4.4, 4.5, 4.6, 4.7, 4.8 and 4.9.

5 Test method

5.1 Test equipment 5.1.1 Vernier calipers. The division value is 0.02mm. 5.1.2 Steel ruler. The division value is 0.5mm. 5.1.3 Brightness meter. Digital, with a resolution not greater than 0.01 cd/m2. 5.1.4 Transparent ruler. It is made of a transparent circular plastic plate with a diameter of 45mm and a thickness of 1mm. Vertical and horizontal coordinates are engraved on the board. Point at the center. The abscissa scale value is 1mm, and the ordinate scale value is 10mm. The total length of both coordinates is 40mm, and the error is not greater than ± 1mm; The two-coordinate verticality error does not exceed ± 1º. 5.2 Main function test Warm up for 5 minutes after starting up, check the functions of the instrument, and it should meet the requirements of 4.3. 5.3 Hot cathode ray tube test 5.3.1 The visible diameter of the screen is measured with a vernier caliper, which shall meet the requirements of 4.4.1. 5.3.2 E-beam trajectory and fluorescent screen brightness test. Place the instrument in a dark room, adjust the brightness to the brightest, and focus the electron beam optimally. The measurement of the brightness of the focused light spot on the phosphor screen shall comply with the provisions of 4.4.2. 5.3.3 The diameter of the focused beam spot of the electron beam shall be measured with a steel ruler and shall comply with the provisions of 4.4.3. 5.4 Deflection voltage test Turn the "Brightness" knob to a moderate brightness, turn the "Accelerator voltage" knob to the best focus, the "Y-axis selection" switch and the "X-axis selection" The switches are all set to "OFF". By adjusting the "X-axis displacement" knob, the light spot can be moved out of the screen in the left and right directions. Then adjust the "X-axis shift" knob to move the light point to the center of the screen, and then set the "Y-axis selection" switch to "upward bias" or "downward bias", Adjust the "Y-axis deflection" knob, the light spot should be able to move out of the screen from the up and down directions respectively. 5.5 Waveform display test Turn the "Brightness" knob to a moderate brightness, turn the "Accelerator voltage" knob to the best focus, and set the "Y-axis selection" switch to "AC". The "X-axis selection" switch is set to "Scan". Slowly adjust the "scanning fine-tuning" knob, the screen should be able to stably display one or two cycles of positive Chord waveform. 5.6 Phase adjustment test Turn the "Brightness" knob to a moderate brightness, turn the "Accelerator voltage" knob to the best focus, the "Y-axis selection" switch and the "X-axis selection" The switches are all set to "AC". Compare with the Li Sharu pattern in the range of 0 ° ~ 180 ° listed in Appendix A (informative appendix). When the knob is turned to the maximum, use a transparent ruler to measure the values of a and b, and calculate the maximum phase difference 按下 according to the following formula, which should meet the requirements of 4.7. 1sin  (1) In the formula. -maximum phase difference in degrees (º); a--The intercept of the Li Sharu figure on the x axis, the unit is millimeter (mm); b-The maximum displacement of the Li Sharu figure on the x axis, the unit is millimeter (mm), see Figure 1. Note. The sign of a and b is based on the coordinate value. Figure 1 Intercept of Li Sharu graph on the x axis and maximum displacement on the x axis 5.7 Safety and environmental tests According to the provisions of Chapter 4 of JY 0009-1990, it shall meet the requirements of 4.8 and 4.10. The hot cathode ray tube should be removed during the vibration test. 5.8 Inspection of appearance quality Sensory testing should meet the requirements of 4.9.

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 inspection methods for factory inspection and type inspection Item No. Inspection Item Item Number Factory Inspection Type Inspection 1 Main functions 4.3 ○ ● 2 Hot cathode ray tube 4.4 ○ ● 3 Deflection voltage 4.5 ● ● 4 Waveform display 4.6 ● ● 5 Phase adjustment 4.7 ○ ● 6 Power input socket and power cord 4.8.1 ○ ● 7 Clearance and creepage distance 4.8.2 ○ ● Table 1 Inspection items for factory inspection and type inspection (continued) Item No. Inspection Item Item Number Factory Inspection Type Inspection 8 Insulation resistance 4.8.3 ● ● 9 Voltage test 4.8.4 ○ ● 10 Appearance quality 4.9 ● ● 11 Environmental test 4.10-● Note. "●" in the table means all inspection items, "○" means sampling inspection items, and "-" means no inspection items 6.3 Lot rules and sampling methods 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 the sampling inspection items should be inspected among the qualified products Check. 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 shall be in accordance with the provisions of JY 0002. 6.4 Non-conformance determination 6.4.1 The judgment of sampling inspection shall be in accordance with JY 0002. 6.4.2 The failure criterion of a single sample shall be in accordance with 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 Items 1, 2, 6, 7, 8, and 9 in Table 1 are the main performance indicators. 6.5 Review rules 6.5.1 Unqualified products can be submitted for re-inspection after rework. 6.5.2 If the cause of the batch disqualification is a sampling inspection item, the item shall be fully inspected 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, instruction manuals, packaging, transportation and storage 7.1 The instructions shall comply with Chapter 11 of JY 0001-2003. 7.2 The rest shall comply with the relevant provisions of JY 0010.

Appendix A

(Informative appendix) Lisaru pattern with 0 ° ～ 180 ° phase A.1 Li Sharu's pattern of 0 ° ～ 180 ° phase is shown in Figure A.1. Figure A.1 Li Sharu pattern of 0 ° ～ 180 ° phase

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