GB/T 9313-1995 General technical requirements for cathode ray tube display equipment for digital electronic computers
Some standard content:
National Standard of the People's Republic of China
General specifications for
CRT display device of computer1Subject content and scope of application
GB/T9313---1995
Replaces GB 9313 88
This standard specifies the general technical conditions for cathode ray tube display devices for digital electronic computers (hereinafter referred to as: CRT display devices or products). The main contents include technical requirements, test methods, inspection rules, packaging, marking, transportation, storage, etc. This standard applies to CRT display devices for digital electronic computers and is the basis for formulating product standards for CRT display devices for digital electronic computers.
2 Reference standards
Packaging, storage and transportation pictorial symbols
Seven-bit coded character set for information processing exchange GB 1988
GB2311
Extension method of seven-bit coded character set for information processing exchange GB2312 Basic set of Chinese coded character set for information exchange GB2423.1
GB 2423. 2
GB 2423. 3
GB 2423. 8
Basic environmental test procedures for electric and electronic products Test A: Low temperature test method Basic environmental test procedures for electric and electronic products Test B: High temperature test method Basic environmental test procedures for electric and electronic products Test Ca: Steady state damp heat test method Basic environmental test procedures for electric and electronic products Test Ed: White drop test method GB2423.10
Basic environmental test procedures for electric and electronic products Test Fc: Vibration (sinusoidal) test method Safety of information technology equipment (including electrical business equipment) GB 4943
GB5080.7 Equipment reliability test Part 7: Verification test plan for failure rate and mean time between failures under constant failure rate assumption
Supplementary control functions for text and symbol forming equipment GB 5261
GB 6833. 2
Electronic measuring instrument electromagnetic compatibility test specification Magnetic field sensitivity test GB 6833.3
Electronic measuring instrument electromagnetic compatibility test specification Electrostatic discharge sensitivity test Electronic measuring instrument electromagnetic compatibility test specification Power supply transient sensitivity test GB 6833. 41
Electronic measuring instrument electromagnetic compatibility test specification Radiated sensitivity test GB 6833. 5
Electronic measuring instrument electromagnetic compatibility test specification Conducted sensitivity test GB 6833. 6
GB6881 Determination of sound power level of acoustic noise source Reverberation chamber precision method and engineering method GB92541
Radio interference limits and measurement methods for signal comfort technical equipment 3 Product classification
3.1 CRT display equipment can be classified according to the following methods: Approved by the State Administration of Technical Supervision on December 22, 1995 66
Implementation on August 1, 1996
GB/T 9313—1995
3.1.1 According to the nature of information processing, it can be divided into: CRT display or CRT display terminal; 3.1.2 According to the display color, it can be divided into: monochrome display device or color display device. 3.2 CRT display terminal can be divided into the following three types according to its use: a.
Character (including Chinese characters) display terminal;
b. Graphic display terminal;
c. Image display terminal.
4 Technical requirements
4.1 Appearance and structure
4.1.1 The surface of the product should not have corrosion and scratches, burrs, bubbles that affect the quality. The coating layer should be uniform, without condensation, no shedding, no paint film cracking and wear.
4.1.2 The surface of the product casing should have the model, factory name and function logo, and the logo should be concise, clear, correct and firm. 4.1.3 Switches and buttons should be flexible and reliable, and the parts should be tightened without looseness. The knobs that need to be adjusted frequently should be easy to use. The product structure design and the layout of the components should be easy to install, use and maintain. 4.1.4 The product should have a good grounding system, and the logic ground and protection ground should be separated from the AC ground. 4.1.5 It is recommended that the elevation angle of the display screen is adjustable to meet the use requirements of the sight angle between 0° and 60° and the incident angle not greater than 40°. 4.2 Display
4.2.1 Display brightness
The display brightness must be adjustable, and the brightness adjustment rate of the various measurement results in 5.4 should not be less than 2:1; a.
h. In a dark environment (illuminance not greater than 5lx), the maximum adjustment value of the brightness of the bright block should not be less than 45cc/m. 4.2.2 Contrast
When the illumination perpendicular to the CRT screen is 250lx, the contrast should not be less than 3. 4.2.3 Flicker
Non-functional flicker should be limited to a level that is not easily directly perceived by the human eye. 4.2.4 Shake
The periodic shake of the display bright spot should not exceed 0.1mm in the frequency range of 0.1Hz to 30Hz. 4.2.5 Distortion
4.2.5.1 Brightness non-uniformity should not exceed 1.5:1. 4.2.5.2 Geometric distortion should not exceed 2%.
4.2.5.3 Non-linear distortion should not exceed 10%. 4.2.6 Color
4.2.6.1 The color temperature of color display equipment is specified by the product label. It is recommended to choose 6500K or 9300K. 4.2.6.2 When the color temperature of a color device is specified as 6500K or 9300K, the color coordinates of its white balance point are specified as: 6500K: = 0.313±0.04
y=0.293±0.04
9300K: 0.281±0.04
y=0.311±0.04
If the color coordinates specified in the product standard are not the above values, the range of variation of the coordinate values of its white balance point is: plus or minus 0.01. 4.2.7 Display range
The display range is specified by the product standard, but the ratio of the area of the display range to the nominal effective working area of the CRT should not be less than 0.6. 4.3 Safety
The safety of CRT display equipment shall comply with the relevant provisions of GB4943. 4.4 Noise
GB/T 9313-1995
When the CRT display device is working, the noise at a distance of 500cm from the product screen (normal position) shall not be higher than 55dB4.5 Electromagnetic compatibility
4.5.1 Radio interference limit value
The radio interference limit value of CRT display equipment is divided into two levels, A and B, according to the provisions of GB9254. The product standard should select A or B level standards according to the actual use environment of the product. "H" should be displayed on the full screen during the test. 4.5.1.1 Limit value of power terminal interference voltage The power terminal T interference voltage of CRT display equipment in normal operation is within the frequency range of 0.15MHz~30MHz, and its limit value (divided into A and B levels) should comply with the corresponding provisions of Table 1. The lower limit value should be used at the transition frequency (0.50MHz, 5MHz). Table 1
Frequency range
0. 15 ~0. 60
Quasi-peak
Limit value, dBuV
Average value
Quasi-peak
Note: For Class B, the limit value decreases linearly with the logarithm of the frequency in the frequency range of 0.15MHz~0.50MHz. 4.5.1.2 Limit value of radiated interference field strength
Average value
The limit value of radiated interference field strength when the CRT display equipment is working normally shall comply with the provisions of Table 2 (divided into A and B levels), the frequency range is 30MHz~1000MHz, the test distance is 30m for Class A and 10m for Class B. The lower limit value shall be used at the transition frequency (230MHz). Table 2
4.5.2 Electromagnetic sensitivity
Test distance
4.5.2.1 Power frequency magnetic field sensitivity
Frequency range, MHz
30~230
230~1000
30~~230
230～1000
Quasi-peak limit.dB(μuV/m）
The product under test is placed in a uniform magnetic field with a frequency range of 47.5Hz～198Hz and a peak-to-peak value of 0.1mT, and shall comply with the test requirements of 5.3.
4.5.2.230Hz~30kHz magnetic field sensitivity
The product under test is placed in a 30Hz to 30kHz alternating magnetic field as specified in Figure 1 and shall be able to work normally. 68
4.5.2.3 Electrostatic discharge sensitivity
6/19373
Figure 130Hz.The limit value of 30kHz magnetic field sensitivity is 50000
Cheek rate H2
After the standard discharge test is carried out on any part of the tested product that may be touched by the operator in normal operation, the tested product should be able to continue to work normally.
The standard discharge is to charge a 300pF capacitor to -15000V and discharge the tested quantity through a 5000 resistor. The ground wire of the high-voltage power supply and the electrostatic discharge probe used in the test must be connected to the protective ground wire of the power supply of the tested product. 4.5.2.4 Power spike transient sensitivity
When the power supply line (applicable to both AC and DC power supply) is superimposed with a pulse signal with a duration of 105 and an amplitude of 2 + the nominal value of the power supply voltage (the effective value of AC power supply), the CRT display equipment should be able to operate normally. 4.5.2.5 Power supply voltage transient sensitivity
When the voltage changes according to the conditions and transients in Table 3 respectively, the performance of the CRT display equipment can be temporarily reduced. After the transient process is shortened, it should be able to resume normal operation. 9
Starting voltage
Transient voltage
Transient time
Reset voltage
4.5.2.6 Power supply frequency transient sensitivity
GB/T 9313—1995
CRT display equipment powered by the parent current may temporarily reduce performance when the frequency changes according to conditions I and I in Table 4 respectively, but it should be able to resume normal operation after the transient process ends. Table 4
Process details
Starting frequency
Transient frequency
Transient time
Recovery frequency
4.5.2.7 Radiated sensitivity
CRT display equipment in the frequency range of 14kHz～1G Hz, the intensity of the radiation field is 1Vm, it should be able to work normally. 4.5.2.8 Conducted sensitivity
In the frequency range of 30Hz ~ 50kHz, when the voltage applied to the power lead of the product is 3V effective value, the product should be able to work normally. If the source dissipating 50W on a 0.50 load cannot produce the required test voltage on the tested product and the tested product can still work normally, the product is judged to meet this requirement;
b. In the frequency range of 50kHz ~ 400MHz, when the 1V effective value from the 50W source is When a voltage of V effective value is applied to the power input terminal of the product under test (excluding the power cable), the product should be able to work normally. If the 500, 1W source cannot generate the required voltage on the product under test, and the product under test can still work normally, the product is judged to meet this requirement.
4.6 Environment
4.6.1 Climate and environmental conditions
The climate and environmental conditions of CRT display equipment are divided into three groups, see Table 5. Table 5
Working temperature
Storage and transportation temperature
T Degree
Storage and transportation humidity
Atmospheric pressure
4.6.2 Mechanical environmental adaptability
5℃～35℃
40%~80%
0℃～40℃
40℃～55℃
40%～90%
20%~95%
86kPa-106kPa
10C-~50℃
20%~93%(40)
GB/T 9313
CRT display equipment is divided into three groups according to its mechanical adaptability: 4. 6. 2. 1
Group I: allowed to be subjected to slight vibration and impact; Group II: allowed to be subjected to general vibration and impact; Subgroup: allowed to be subjected to larger vibration and impact. The vibration test conditions are shown in Table 6, and the impact test conditions are shown in Table 7Table 6
Resonance search
Resonance hold
Vibration cycle
Frequency range
Sweep rate
Displacement amplitude or acceleration
Displacement amplitude or acceleration
Duration
Frequency range
Displacement amplitude or acceleration
Sweep rate
Number of times or duration
Note: The displacement amplitude in the table is a single peak value.
5Hz～35Hz
10±0.5min
51z～35Hz～5Hz
Peak acceleration, m/s
10Hz～-55Hz
10Hz～58Hz
≤1 oct/min
0. 75mm(10~-25Hz)
0.15mm(25~58Hz)
30±1min
10Hz~58Hz～10Hz
≤1 oct/min
Pulse duration, ms
CRT display equipment should be able to withstand the package drop test. The test conditions are shown in Table 8. Table 8
Gross weight of packing box, kg
>10~25
25～50
>50～75
75～100
Drop height, cm
Note: The levels of climate and mechanical environment in 4.6.1 and 4.6.2 are not required to correspond one to one during use, and cross-use is allowed.
4.7 Power supply adaptability
58Hz~~5001z
60+lmin
58Hz500Hz～58Hz
120min
Impact waveform
Half sine wave
Post-peak sawtooth wave
Half sine wave
4.7.1 For AC-powered CRT display equipment, it should be able to work normally under the conditions of 220V15%, 50Hz±1Hz (except 4.2.4).
4.7.2 For DC-powered CRT display equipment, it should be able to work normally when the supply voltage is ±5% of the nominal value. The nominal value is specified in the product standard.
4.8 Performance
G9313-1995
Use the unacceptable value of mean time between failures (MTF) m as an indicator of the reliability level of RT display equipment. Its specific value is specified in the product standard. RT display should not be less than 6000h; CRT display terminal should not be less than 4000h. 4.9 Others
4.9.1 (RT display terminal shall meet the following requirements: 4.9.1.1 It shall have offline information processing capabilities. 4.9.1.2 The characters (including 4.9.1.3 The display format shall comply with the serialization and standardization requirements. The following formats are recommended: a. Western character display terminal:
80 columns × 24 (25) rows
132 columns × 24 (25) rows
Chinese character display terminal:
40 columns × 24 (25) rows
64 columns × 24 (25) rows
C. Graphics and image display terminal:
512 × 512 dot matrix
640 × 100 dot matrix
640 × 480 dot matrix
1021 × 768 dot matrix
1024 × 1024 dot matrix
1280 × 1024 Dot matrix
1636×1280 dot matrix
2048×1636 dot matrix
2048×2048 dot matrix
4.9.1.4 The design of information processing, information exchange and control functions shall comply with the relevant regulations of GB1988, G2311, G2312 and B5261.
4.9.2 The interface with the host or other equipment shall comply with the relevant standards and detailed provisions of the product standards. 4.9.3 The input and output devices of the product shall comply with the relevant standards and detailed provisions of the product standards. 4.9.4 Other technical performance and technical requirements shall be specified by the product standards. 5 Test methods
5.1 Test environmental conditions
Except for the climatic environment test and reliability test, other tests shall be carried out under the following climatic environment conditions: Temperature:
Relax temperature:
15~35 C
45%~75%
86kPa- 106kPa
5.2 Appearance and structure inspection
Use door test method to inspect, the product should meet the requirements of 4.1. 5.3 Performance inspection
Test each technical performance requirement in 4.9 one by one. It should meet the requirements of product standards. 5.4 Display characteristics inspection
5.4.1. Brightness test
Measure the brightness of the screen under the condition of not more than 5x illumination. During the measurement, ensure that the detection area of the brightness meter is within the bright block and not less than 9 pixels. Adjust the brightness and find two values that meet the requirements of 4.2.1a: At the same time, the larger value should meet the requirements of 4.2.1b.
Record the adjustment positions of the above two values (ST, S2). If S and S have a large margin, it is allowed to reselect the position that is beneficial to the test results when performing subsequent tests related to S1 and S, but S1 and S2 should be unified for all related tests, that is, after reselecting SS, all tests related to S and S should be re-performed.
5.4.2 Contrast measurement
Under a diffuse light environment with adjustable illumination, set the illumination perpendicular to the CRT screen to 2501x, and measure the brightness of the bright block in the center of the screen and the dark background around it. When measuring, avoid the shadow of the probe falling within the detection coverage area, and avoid the glare from the glass screen entering the probe. Adjust the millimeter to the S. and S. positions recorded in 5.4.1, and repeat the above test. The contrast measured at each adjustment position shall meet the requirements of 4.2.2.
5.4.3 Flash detection
Make the sample under test display a static bright pattern that fills the display range as much as possible (such as a full screen bright block, etc.), and use visual inspection to check the flash of the bright pattern on the screen when the brightness adjustment is respectively at the S,~S2 positions recorded in 5.4.1. The result shall meet the requirements of 4.2.3. 5.4.4 Detection of display dot shaking
Use a microscope with a magnification of not less than 20 times and a scale resolution of not less than 0.02mm to observe the swing amplitude of the center or edge of the independently distinguishable display bright spot in the center and four corners of the screen, as shown in Figure 2. The results should all meet the requirements of 4.2.4. When measuring, the frequency of the AC power supply can be limited to 50Hz+0.1Hz
Complete dot center swing amplitude 4
5.4.5 Detection of brightness non-uniformity
Bright spot edge swing amplitude d
In a dark room with an illumination of not more than 51x, find the positions of the two bright blocks with the largest brightness difference in the display range caused by non-brightness control function and measure their brightness: If there is no position with brightness difference, measure the brightness of the bright blocks in the center of the screen and the four corners of the display range respectively. When measuring, the detection coverage area should not be greater than 0.5% of the display range. Adjust the brightness to the two positions (S, S1) recorded in 5.4.1 respectively, and measure according to the above requirements and methods. The ratio of the maximum value to the minimum value of the several values measured at each brightness adjustment position shall meet the requirements of 4.2.5.1. 5.4.6 Detection of geometric distortion
Within the range of S1, S2 recorded in 5.1.1, adjust the brightness so that the test sample is in the position that is most unfavorable to the test result of this item, and display a pattern that can directly reflect the display range. Take the points of the four corners of the contour as A, B, C, I) to form a quadrilateral ABCI) as shown in Figure 3. The maximum offset of the contour line beyond the outside of the dotted line AB is α1. The maximum offset into the inside of AB is α. Similarly, the offsets of the other sides are bh2, c and dd respectively. 73
GB/T 9313--1995
Measure and calculate the distortions not listed. Each result shall meet the requirements of 4.2.5.2. a.
Horizontal keystone distortion TH:
TH-[(AD-BC)/(AD+BC)IX 100%
Vertical keystone distortion Tv:
Tv(AB-DC)/(AB+DC)J×100%
Upper barrel distortion BH upper:
BH upper-[4ai/(AD+BC)JX100%
Lower barrel distortion BH lower:
BH lower=[4b,/(AID)+ BC)1X 100%Left barrel distortion Bv left:
Bv left=[4c1/(AD+BC)]X 100%
right barrel distortion Bv right:
Bv right=[4d,/(AD-+BC)1X100%
upper pincushion distortion CHE:
CH upper=[4a2/(AD+ BC)I× 100%
lower pincushion distortion CH lower:
CH lower=- [4b2/(AID)+ BC) ]X 100%left pincushion distortion Cv left:
Cv left=E4c2/(AB+DC)IX 100%
right pincushion distortion Cv right:
Cv right=[4d2/(AB-+DC)]× 100%
Parallelogram distortion P:
P=[2(AC--BD)/(AC+BD)1X100%
5.4.7 Nonlinear distortion detection
（5）
（6）
（9）
（10）
（11)
Make the test sample display a mark with equal horizontal distribution (equal column pixels) of not less than 16 columns and equal vertical distribution (equal row pixels) of not less than 12 rows in the entire display range. Within the range of S1 and S2 recorded in 5.4.1, adjust the brightness so that the test sample is in the position that is most unfavorable to the test result of this item.
a. Find and measure the maximum value Lmx/mm and the minimum value Lmin/mm of the distance between two adjacent marks in the horizontal direction. The horizontal display nonlinear distortion K is calculated as follows: K' [(Lmax-Lm)/Lm]X100%
K\=[(Lm - Lmin)/Lm×100%
Wu (12), (13); K\-
The distortion at the widest mark width;
(12)
(13)
GB/T 9313—1995
K”…Distortion at the maximum mark width;
Lm—average mark width, nm. See formula (14). In: L/n
Horizontal width of display range:
n: number of horizontal columns.
b. The measurement and calculation method of vertical display nonlinear distortion is the same as that of horizontal display nonlinear distortion. The test results should meet the requirements of 4.2.5.3.
5.4.8 Display range measurement
Make the test sample work in a state that is convenient for measuring the display range (such as the display can directly reflect the pattern of the edge of the display range contour, etc.) but not conducive to increasing the display area (the brightness adjustment position is between S and S. recorded in 4.4.1). The result should meet the requirements of 5. 2.7 requirements.
5.5 Safety test
Perform according to the relevant provisions of GB4943, and the results should meet the requirements of GB4943. 5.6 Noise detection
Perform according to GB6881. The test point is 50cm outside the CRT screen (on the normal position), and the results should meet the requirements of 4.4. 5.7 Electromagnetic compatibility test
5.7.1 Radio interference limit value test
5.7.1.1 Interference at the power supply end The voltage limit value test measurement method shall be carried out in accordance with Chapter 7 of GB9254; the measurement results shall comply with the requirements of 4.5.1.1. 5.7.1.2 The radiation disturbance field strength limit value test measurement method shall be carried out in accordance with Chapter 8 of GB9251, and the measurement results shall comply with the requirements of 4.5.1.2. 5.7.2 Electromagnetic sensitivity test
5.7.2.1 Magnetic field sensitivity test
The test method shall be carried out in accordance with the relevant chapters of GB6833.2, and the test results shall comply with the requirements of 4.5. 2.1 and 4.5.2.2 requirements 5.7.2.2 Electrostatic discharge sensitivity test
The test method shall be carried out in accordance with the relevant clauses of GB6833.3, and the test results shall meet the requirements of 4.5.2.1 and 4.5.2.3. 5.7.2.3 Power supply transient sensitivity test
The test method shall be carried out in accordance with the relevant clauses of GB6833.4, and the test results shall meet the requirements of 4.5.2.4, 4.5.2.5 and 4.5.2.6 respectively. 5.7.2.4 Radiated sensitivity test
The test method shall be carried out in accordance with the relevant clauses of GB6833.5, and the test results shall meet the requirements of 4.5.2.7. 5.7.2.5 Conducted sensitivity test
The test method shall be carried out in accordance with the relevant clauses of GB6833.6, and the test results shall meet the requirements of 1.5.2.8a and 4.5.2.8b respectively. 5.8 Environmental test
The environmental test method of this standard shall be carried out in accordance with the provisions of relevant national standards. For specific tests, see the following clauses. 5.8.1 Low temperature test
5.8.1.1 Low temperature test under working state
According to GB2423.1. Test Ad: The low-temperature test method of temperature gradient of non-heat dissipation test samples shall be carried out. The test temperature shall be the lower limit of the operating temperature specified in Table 5, and the duration shall be 16 hours. In order to prevent ice and condensation of the test samples during the test, the test samples are allowed to be sealed with a moisture-proof film before the test. If necessary, a desiccant can also be placed in the sealing sleeve. After the test period expires, restore for 2 hours, conduct appearance and structural inspection according to 5.2, and then power on for no less than 30 minutes. The test samples should work normally. 5.8.2 High-temperature test
5.8.2.1 High-temperature test under T working state
Perform the high-temperature test method of temperature gradient of heat dissipation test samples in Test Bd in GB2423.2. This test does not require pretreatment: the initial inspection shall be carried out according to 5.2; the test temperature shall be the upper limit of the working temperature specified in Table 5, and the duration shall be 2h: during the test, the test sample shall be operated in a state that is easy to judge whether it is normal, and it shall work normally. 5.8.2.2 The high temperature test under storage and transportation conditions shall be carried out according to the high temperature test method of temperature gradient of non-heat dissipation test samples in Test Bh of GB2423.2. The test temperature shall be the upper limit of the storage and transportation temperature specified in Table 5, and the duration shall be 16h. After the test period expires, restore for 2h to carry out appearance and structural inspection according to 5.2 - then power on for no less than 30min, and the test sample shall work normally. 5.8.3 Steady damp heat test
shall be carried out according to GB2423.3. The initial test shall be carried out in accordance with 5.2; the conditional test shall be carried out when the test sample is not packaged, not powered on, and in a "ready to use" state. The duration is 48 hours. After the conditional test, the temperature and humidity of the test box (room) shall be adjusted according to the upper limits of the working temperature and humidity specified in Table 5. When adjusting, the relevant requirements of the test Ca: constant mixed heat test method shall be referred to to prevent condensation from forming on the test sample 1. After reaching stability, the test sample shall be powered on for no less than 30 minutes and work normally. 5.8.4 Vibration test
shall be carried out in accordance with GB2423.10, and the initial test shall be carried out in accordance with 5.2; the conditional test shall be carried out according to the values specified in Table 6. During the test, the test sample shall not have any mechanical damage, loosening of the fastening parts, or adjustment phenomenon in the machine. During the vibration cycle, the power supply shall be turned on. Work normally. The test sequence is abcd.
a. Resonance search, that is, initial vibration response check. If there are more than 4 resonance points in each axis, only the 4 larger ones are selected: h. Resonance maintenance, that is, the fixed frequency test method in the endurance test. Each axis selects the resonance frequency or dangerous frequency obtained in the resonance search for the test. If there is no obvious resonance within the test frequency range, the upper limit of the range is selected; C vibration cycle, that is, the sweep frequency test method in the endurance test: d. Post-drum vibration response check, that is, repeat the resonance search. The resonance position and resonance point of the two inspections should not have a large change. After the test, the test sample is finally inspected. First check according to 5.2, and then power on for at least 30 minutes. It should work normally. 1. 5.8.5 Self-exit drop test||tt ||Perform according to (B2423.8, initial test according to 5.2: Condition test is carried out according to the values specified in Table 8, the test sample is in good packaging condition, and the drop height is determined according to the group and gross weight: the number of drops is 2 times: the test sample is in the normal transportation position and state for free drop. After the test, the packaging box of the test sample should not have large deformation or obvious damage. The test sample is checked according to 5.2 and powered on for no less than 30 minutes. It should work normally.
5.9 Power adaptability test
5.9.1 AC power adaptability test
For AC-powered CRT display equipment, test the test sample according to the following combinations. The test time for each combination is not less than 15 minutes. The test sample should be able to stop normally.1. (4.2.5 220V
e: 242V
5.9.2 DC power supply voltage adaptability test For DC-powered CRT display equipment, adjust the DC power supply voltage to make it deviate from the nominal value by 5%. The duration of various deviations (multiple power supplies should take various deviation combinations) should not be less than 15min: the test sample should be able to work normally. 5.10 Reliability test
5.10.1 Test conditions
The ambient temperature of the reliability test should be carried out under the upper limit of the temperature range specified in the product standard (the error is ±10). 5.10.2 Test plan
When the reliability test is ordered, it shall be carried out according to the 5:6 of the fixed-time constant-number truncation test plan in GB5080.7. The 76
plan of the product standard can also be used.
GB/T 9313
—1995
During the entire test process, the test sample should work in a state that is easy to judge whether it is a fault. For this purpose, the product standard shall specify the working state of the test sample and the judgment method of the operation of the test sample and related faults during the reliability test. 5.10.3 Test time
The test time shall last until the total test time and the total number of related faults can be accepted or accepted according to the specified test plan. When multiple devices are tested, the test time of each device shall not be less than half of the average test time of all the tested devices. 5.10.4 Fault classification
Fault classification and judgment criteria shall be judged in accordance with the provisions of Appendix A (supplement). 6 Inspection rules
General provisions
Products must be inspected in accordance with the provisions of this standard and the supplementary provisions in the product standard during finalization (design finalization, production finalization) and during production, and shall meet the requirements of these provisions. 6.2 Inspection classification
Product inspection is classified as follows:
Finalization inspection;
Delivery inspection;
Routine inspection
The test items and sequence of each type of inspection are shown in Table 9. If the product standard supplements the test items, the test classification and the insertion position of the test sequence of the supplementary test items shall be specified.
Inspection items
Appearance and structure
Performance inspection
Display characteristics
Safety
Electromagnetic compatibility
Current adaptability
Reliability
Technical requirements
Note: "" indicates the items that should be carried out in this type of test; "6.3 Finalization inspection
Testing party
" indicates the items that are not carried out.
6.3.1 The product shall pass the finalization inspection during the design finalization and production finalization. Finalization inspection
Delivery inspection
Routine inspection
Finalization inspection is funded by the quality inspection department of the product manufacturing unit or the quality inspection unit designated or entrusted by the superior competent department. 6.3.2
3 The number of samples for finalization inspection is 2 sets. The number of samples for reliability test shall be as specified in Table 10. 6.3.32; the condition test is carried out according to the values specified in Table 6. During the test, the test sample should not have mechanical damage, loose fastening parts or adjustment phenomena in the machine. During the vibration cycle, it should be powered on and work normally. The test sequence is carried out in order of abcd.
a. Resonance search, that is, initial vibration response inspection. If there are more than 4 resonance points in each axis, only 4 larger vibration points are selected: h. Resonance maintenance, that is, the fixed frequency test method in the endurance test. Each axis selects the resonance frequency or dangerous frequency obtained in the resonance search for testing. If there is no obvious resonance within the test frequency range, the upper limit of the range is selected; C vibration cycle, that is, the sweep frequency test method in the endurance test: d. Post-drum vibration response inspection, that is, repeated resonance search, the resonance parts and resonance points of the two inspections should not have significant changes. After the test, the test sample is finally inspected, first checked according to 5.2, and then powered on for not less than 30 minutes. It should work normally. 5.8.5 Free fall test
Perform according to (B2423.8, initial test according to 5.2: Condition test according to the values specified in Table 8, the test sample is in good packaging condition, and the drop height is determined according to the group and gross weight: the number of drops is 2 times: the test sample is in the normal transportation position and state for free fall. After the test, the packaging box of the test sample should not have large deformation or obvious damage. Check the test sample according to 5.2 and power on for no less than 30 minutes. It should work normally.
5.9 Power adaptability test
5.9.1 AC power adaptability test
For AC-powered CRT display equipment, test the test sample according to the following combinations. The test time for each combination is not less than 15 minutes. The test sample should be able to stop normally.1. (4. 2.5 may be excluded). 220V
e: 242V
5.9.2 DC power supply voltage adaptability test For DC-powered CRT display equipment, adjust the DC power supply voltage to deviate from the nominal value by 5%. The duration of various deviations (multiple power supply groups should take various deviation combinations) should not be less than 15 minutes: the test sample should be able to work normally. 5.10 Reliability test
5.10.1 Test conditions
The ambient temperature of the reliability test should be carried out at the upper limit of the temperature range specified in the product standard (the error is ±10). 5.10.2 Test plan
When conducting the reliability test, follow the 5:6 of the timing constant truncation test plan in GB5080.7. The 76
plan of the product standard can also be used.
GB/T 9313
—1995
During the entire test process, the test sample should work in a state that is easy to judge whether it has a fault. For this reason, the product standard should specify the working state of the test sample and the judgment method of the operation of the test sample and related faults during the reliability test. 5.10.3 Test time
The test time shall last until the total test time and the total number of related faults can be accepted or accepted according to the prescribed test plan. When testing multiple devices, the test time of each device shall not be less than half of the average test time of all the tested devices. 5.10.4 Fault classification
Fault classification and judgment criteria shall be judged in accordance with the provisions of Appendix A (supplement). 6 Inspection rules
General provisions
The product must be tested in accordance with the provisions of this standard and the product standard during finalization (design finalization, production finalization) and production. The product shall be inspected in accordance with the supplementary provisions of the relevant regulations and shall comply with the requirements of these regulations. 6.2 Inspection classification
Product inspection is classified as follows:
Type inspection;
Delivery inspection;
Routine inspection
The test items and sequence of each type of inspection are shown in Table 9. If the product standard supplements the test items, the test classification of the supplementary test items and the insertion position of the test sequence shall be specified.
Inspection items
Appearance and structure
Performance inspection
Display characteristics
Safety
Electromagnetic compatibility
Current adaptability
Reliability
Technical requirements
Note: "" indicates the items that should be carried out in this type of test; "6.3 Type inspection
Test side
" indicates the items that are not carried out.
6.3.1 The product shall pass the type inspection when the design is finalized and the production is finalized. Finalization inspection
Delivery inspection
Routine inspection
Finalization inspection is undertaken by the quality inspection department of the product manufacturing unit or the quality inspection unit designated or commissioned by the superior competent department. 6.3.2
3The number of samples for finalization inspection is 2 sets. The number of samples for reliability test shall be as specified in Table 10. 6.3.32; the condition test is carried out according to the values specified in Table 6. During the test, the test sample should not have mechanical damage, loose fastening parts or adjustment phenomena in the machine. During the vibration cycle, it should be powered on and work normally. The test sequence is carried out in order of abcd.
a. Resonance search, that is, initial vibration response inspection. If there are more than 4 resonance points in each axis, only 4 larger vibration points are selected: h. Resonance maintenance, that is, the fixed frequency test method in the endurance test. Each axis selects the resonance frequency or dangerous frequency obtained in the resonance search for testing. If there is no obvious resonance within the test frequency range, the upper limit of the range is selected; C vibration cycle, that is, the sweep frequency test method in the endurance test: d. Post-drum vibration response inspection, that is, repeated resonance search, the resonance parts and resonance points of the two inspections should not have significant changes. After the test, the test sample is finally inspected, first checked according to 5.2, and then powered on for not less than 30 minutes. It should work normally. 5.8.5 Free fall test
Perform according to (B2423.8, initial test according to 5.2: Condition test according to the values specified in Table 8, the test sample is in good packaging condition, and the drop height is determined according to the group and gross weight: the number of drops is 2 times: the test sample is in the normal transportation position and state for free fall. After the test, the packaging box of the test sample should not have large deformation or obvious damage. Check the test sample according to 5.2 and power on for no less than 30 minutes. It should work normally.
5.9 Power adaptability test
5.9.1 AC power adaptability test
For AC-powered CRT display equipment, test the test sample according to the following combinations. The test time for each combination is not less than 15 minutes. The test sample should be able to stop normally.1. (4. 2.5 may be excluded). 220V
e: 242V
5.9.2 DC power supply voltage adaptability test For DC-powered CRT display equipment, adjust the DC power supply voltage to deviate from the nominal value by 5%. The duration of various deviations (multiple power supply groups should take various deviation combinations) should not be less than 15 minutes: the test sample should be able to work normally. 5.10 Reliability test
5.10.1 Test conditions
The ambient temperature of the reliability test should be carried out at the upper limit of the temperature range specified in the product standard (the error is ±10). 5.10.2 Test plan
When conducting the reliability test, follow the 5:6 of the timing constant truncation test plan in GB5080.7. The 76
plan of the product standard can also be used.
GB/T 9313
—1995
During the entire test process, the test sample should work in a state that is easy to judge whether it has a fault. For this reason, the product standard should specify the working state of the test sample and the judgment method of the operation of the test sample and related faults during the reliability test. 5.10.3 Test time
The test time shall last until the total test time and the total number of related faults can be accepted or accepted according to the prescribed test plan. When testing multiple devices, the test time of each device shall not be less than half of the average test time of all the tested devices. 5.10.4 Fault classification
Fault classification and judgment criteria shall be judged in accordance with the provisions of Appendix A (supplement). 6 Inspection rules
General provisions
The product must be tested in accordance with the provisions of this standard and the product standard during finalization (design finalization, production finalization) and production. The product shall be inspected in accordance with the supplementary provisions of the relevant regulations and shall comply with the requirements of these regulations. 6.2 Inspection classification
Product inspection is classified as follows:
Type inspection;
Delivery inspection;
Routine inspection
The test items and sequence of each type of inspection are shown in Table 9. If the product standard supplements the test items, the test classification of the supplementary test items and the insertion position of the test sequence shall be specified.
Inspection items
Appearance and structure
Performance inspection
Display characteristics
Safety
Electromagnetic compatibility
Current adaptability
Reliability
Technical requirements
Note: "" indicates the items that should be carried out in this type of test; "6.3 Type inspection
Test side
" indicates the items that are not carried out.
6.3.1 The product shall pass the type inspection when the design is finalized and the production is finalized. Finalization inspection
Delivery inspection
Routine inspection
Finalization inspection is undertaken by the quality inspection department of the product manufacturing unit or the quality inspection unit designated or commissioned by the superior competent department. 6.3.2
3The number of samples for finalization inspection is 2 sets. The number of samples for reliability test shall be as specified in Table 10. 6.3.32 Inspection classification
Product inspection is classified as follows:
Type inspection;
Delivery inspection;
Routine inspection
The test items and sequence of each type of inspection are shown in Table 9. If the product standard supplements the test items, the test classification and insertion position of the test sequence of the supplementary test items should be specified.
Inspection items
Appearance and structure
Performance inspection
Display characteristics
Safety
Electromagnetic compatibility
Current adaptability
Reliability
Technical requirements
Note: "" indicates the items that should be carried out in this type of test; "6.3 Type inspection
Test side
" indicates the items that are not carried out.
6.3.1 Products should pass the type inspection when they are finalized in design and production. Finalization inspection
Delivery inspection
Routine inspectionbzxZ.net
Finalization inspection is undertaken by the quality inspection department of the product manufacturing unit or the quality inspection unit designated or commissioned by the superior competent department. 6.3.2
3The number of samples for finalization inspection is 2 sets. The number of samples for reliability test shall be as specified in Table 10. 6.3.32 Inspection classification
Product inspection is classified as follows:
Type inspection;
Delivery inspection;
Routine inspection
The test items and sequence of each type of inspection are shown in Table 9. If the product standard supplements the test items, the test classification and insertion position of the test sequence of the supplementary test items should be specified.
Inspection items
Appearance and structure
Performance inspection
Display characteristics
Safety
Electromagnetic compatibility
Current adaptability
Reliability
Technical requirements
Note: "" indicates the items that should be carried out in this type of test; "6.3 Type inspection
Test side
" indicates the items that are not carried out.
6.3.1 Products should pass the type inspection when they are finalized in design and production. Finalization inspection
Delivery inspection
Routine inspection
Finalization inspection is undertaken by the quality inspection department of the product manufacturing unit or the quality inspection unit designated or commissioned by the superior competent department. 6.3.2
3The number of samples for finalization inspection is 2 sets. The number of samples for reliability test shall be as specified in Table 10. 6.3.3
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