GB/T 4967-1995 General technical requirements for electronic calculators
Some standard content:
National Standard of the People's Republic of China
General technical conditions for electronic calculators
General specific atlon far electronic calculators1 Subject content and scope of application
GB/T 4967—1995
Replaces GB 4967--85
This standard specifies the general technical conditions for electronic calculators. The main contents include: terminology, product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage, etc. This standard applies to electronic calculators (hereinafter referred to as calculators) and serves as the basis for formulating product standards. 2 Reference standards
GB191 Pictorial marking for packaging, storage and transportation
Basic environmental testing regulations for electric and electronic products GB2421
GB 2422
Terms and terms
Basic environmental testing regulations for electric and electronic products Test A:
Low temperature test method
Basic environmental testing regulations for electric and electronic products Basic environmental testing regulations for electric and electronic products GB 2423. 2
Basic environmental testing regulations for electric and electronic products GB 2423. 3
Test B:
Test Ca:
Basic environmental testing regulations for electric and electronic products Test Ea:
GB 2423. 5
GB 2423. 7
GB 2423. 10
GB2828
GB 2829
Basic environmental test procedures for electric and electronic productsTest Ecr
High temperature test method
Steady-state damp heat test method
Impact test method
Tip and overturn test method
Test Fc vibration (sinusoidal) test method
Basic environmental test procedures for electric and electronic productsBatch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches)Periodic inspection counting sampling procedure and sampling table (applicable to inspection of production process stability)GB 4857. 2
GB 4857- 5
Basic tests for transport packages
Temperature and humidity conditioning treatment
Basic tests for transport packages
Vertical impact drop test method
GB49431
Safety equipment reliability test for information technology equipment (including electrical business equipment)Part 7 Failure rate and mean time between failures under constant failure assumptionVerification GB 5080.7
Test scheme
GB5271.14 Vocabulary of data processing Part 14 Reliability maintenance and availability Electromagnetic compatibility test specification for electronic measuring instruments Magnetic field sensitivity test GB 6833. 2
GB 6833. 3
GR 6833- 4
GB 6833. 5
GB 6833.6
Electronic compatibility test specification for electronic measuring instruments Electrostatic discharge sensitivity test Electromagnetic compatibility test specification for electronic measuring instruments Power supply transient sensitivity test Electromagnetic compatibility test specification for electronic measuring instruments Radiated sensitivity test Electromagnetic compatibility test specification for electronic measuring instruments Conducted sensitivity test Limits and measurement methods of radio interference of information technology equipment GB 9254
SJ/T 9528 Quality classification standard for electronic calculators 3 Terminology
3.1 Simple calculator
simple calculator
Approved by the State Administration of Technical Supervision on April 5, 1995, implemented on December 1, 1995
GB/T 4967—1995
Calculator with functions of addition, subtraction, multiplication, division, accumulation, subtraction, and squaring. 3.2 Function calculator function calculator In addition to the functions of a simple calculator, it must also have the functions of one or more functions (trigonometric functions, logarithms, exponential functions, hyperbolic functions, etc.).
3.3 Program calculator program calculator In addition to the functions of a simple calculator and a function calculator, it also has the function of completing specific functions by inputting a program step by step. 3.4 Mixed calculator mixed calculator adds clock, music, games, storage, graphics and other functions to a simple calculator, a function calculator or a program calculator, but the calculator is mainly used for calculation. 4 Product classification
4.1 Calculators are divided into simple type, function type, program type and mixed type according to their functions. 4.2 Calculators are classified into desktop, pocket and card types according to their size.
Those with a volume of more than 250cm are desktop, those with a volume of less than 250cm are pocket-sized, and those with a maximum thickness of less than or equal to 5mm are card types. 5 Technical requirements
5-1 Appearance and structure
5.1.-1 The surface and decoration of the shell should be free of cracks, deformation, scratches, fading, stains, blistering, degumming, overflowing glue, burrs, etc. The surface coating should be uniform and free of corrosion, shedding and abrasion. Metal parts should not have corrosion and other mechanical damage. 5.1.2 The display should not have stains or damage. The brightness of the character strokes on the display part should be uniform and clear, and there should be no dark corners, black spots, rainbows, bubbles, dark display, hidden strokes, multiple strokes, missing strokes, no display, flashing, cross effects, etc. 5.1.3 The parts of the product should be tightened without looseness. The buttons and switches should be properly matched, and the control should be flexible and reliable. 5.1.4 The words, symbols and signs that describe the functions shall be clear and correct and shall comply with the relevant national standards. 5.2 Functions and performance
The basic performance parameters of various types of calculators are shown in Table 1 (the basic performance parameters of hybrid calculators shall refer to the basic performance parameters of the corresponding types). Table 1
Technical performance
Liquid crystal display
Other displays
Indication signal
Memory capacity
"Base word length
Decimal point form
Power supply mode
Display time
Card type
Pocket type
Simple type
Negative sign, error character, memory numberbzxz.net
Not less than 1 full word length
Not less than 8 bits
Floating point, fixed point
AC, AC, DC
Card type
Blood Number type
Negative sign (including negative sign of exponent), output
increment character, memory content
floating point, exponential representation
The time from numeric key to displaying number is less than 0.5s. The specific functions and performance of the calculator shall be specified by the product standard. AC, AC, DC
Card type
Pearl type
Program type
Negative sign, error symbol, memory content
and operation mode conversion
floating point, exponential representation
AC, AC, DC
5.3 Safety
GB/T 4967—1995
The safety requirements of the product shall comply with the provisions of GB 4943. The following two items are only applicable to products powered by AC; 5.3.1 Earth leakage current
The allowable value of the earth leakage current of the product shall comply with the requirements of Article 5.2 of GB4943, and the specific value shall be specified in the product standard. 5.3.2 Dielectric strength
The applied voltage value of the product's dielectric strength shall comply with the requirements of Article 5.3 of GB4943, and the specific value shall be specified in the product standard. 5.4 Power supply adaptability
5.4.1 For products powered by AC, it should be able to operate normally under AC 220V+%, 502 Hz. 5.4.2 For DC-powered products, they should be able to work normally within the range of 105% to 90% of the nominal value of DC current. Solar-powered products are required to work normally under conditions of 100 to 2501x illumination. The nominal value is specified by the product standard. 5.5 Keyboard
5.5.1 The calculator keyboard should include numeric keys and function symbol keys. The arrangement of the numeric keys is as follows: Tuanhui
Guoguohui
The numeric key "(" can be located at any position below the range of "1" and "2". 5. 5.2 The keys should be flexible to press and have reliable contact. Except for special keys, other keys should be flat and consistent, and their pressure dispersion should not exceed 0.3 N. Under the specified load conditions, the on-off life of each key is not less than 106 times. 5.5.3 The function symbols on keys other than numeric keys are specified by the product standard. 5. 5.4 The key pressure and stroke should comply with Table 2 Table 2
Card Type
Pocket Type
5.6 Electromagnetic Compatibility
Applies only to AC powered products.
5.6.1 Radio interference limit value
Key pressure
0. 2~~ 0. 6
0. 3-~ 0. 8
0. 4~1. 5
Key travel
0. 1 ~0. 9
0.3～1.5
0. 5~2. 0
The radio interference limit value of the product shall meet the requirements of GB9254. The radio interference limit value specified in Class A or Class B shall be clearly specified in the product standard.
5.6.2 Electromagnetic sensitivity
The magnetic field sensitivity of the product shall meet the requirements specified in GB6833.2~6833.6. 5.7 Environmental conditions
5.7.1 Grouping of product environmental tests
Calculators are divided into two groups according to the severity of their environmental conditions: Group 1: Able to withstand occasional slight vibrations, adapt to moderate high and low temperature and humidity changes, and used under general indoor conditions. Group 2: Able to withstand sudden drops or withstand large vibrations and shocks during frequent movements. Able to adapt to large degrees of high and low temperature, humidity changes, and can be used in the open air (or with a simple cover). 5.7.2 Climate and environmental adaptability
Climate and environmental adaptability are shown in Table 3.
Relative humidity
Atmospheric pressure
Storage and transportation
Storage and transportation
5.7.3 Mechanical environmental adaptability
5.7.3. 1 Vibration adaptability
Vibration adaptability is shown in Table 4.
Test items
Initial and final
Perturbation response inspection
Fixed frequency endurance
Sweep cheek endurance
5.7-3.2 Impact adaptability
Impact adaptability is shown in Table 5.
Peak acceleration
5.7.3.3 Drop adaptability
Drop adaptability is shown in Table 6.
GB/T 4967—1995
Liquid crystal display
—540℃
-15 ~55 ℃
Other display
—10~40
30~55℃
40%~80%(40)
LCD display
-5~40℃
-15～55℃
Other display
—15~40℃
—40~55℃
40%~90%(40℃)
More than 93%(40C)
86~106kPa
Test content
Range
Sweep rate
oct/min
Displacement amplitude
Displacement amplitude
Duration
Range range
Displacement amplitude
Frequency sweep rate
oct/min
Number of cycles
Pulse duration
0.75(10-~25Hz)
0.15(25--55Hz)
10-55--10
Impact waveform
Half-sine waveform
Tilt angle
5.7.3.4 Drop adaptability of transport package
Drop adaptability of transport package is shown in Table 7.
Mass of transport package
>15~30
>30~40
>40~45
245~50
5.8 Reliability
GB/T 49671995
The mean time between failures (MTBF) is used to measure the reliability level of the product. Number of horizontal drops
Either side of the bottom edge is 4 drops on each axis
Drop height
This standard stipulates that the m value (unacceptable value of MTBF) of the calculator shall not be less than 12000h. The specific m value shall be given in the product standard.
6 Test method
6.1 Test environment conditions
Unless otherwise specified, all tests shall be carried out under the following normal environmental conditions: temperature: 15~35℃,
Relative humidity: 45%~75%;
Atmospheric pressure: 86~106kPa,
Illuminance: 100~250 [yuan.
6.2 Appearance and structure inspection
Under normal conditions, at a distance of 50cm and at a 45° angle, look at the surface of the test sample's shell obliquely or straight on, and check the key switches of the control mechanism by hand. All of these should meet the requirements of Article 5.1. 6.3 Function and technical performance inspection
Carry out a comprehensive inspection of the functions of the test sample in accordance with the requirements of the "Function Inspection Procedure Table" in the product standard, which should meet the requirements of the product standard. The main technical performance should also meet the requirements of the product standard. 6.4 Safety test
6.4. 1 Safety test
Carry out in accordance with the relevant provisions of GB4943.
6.4.2 Earth leakage current test
Carry out in accordance with Article 5.2 of GB4943.
6.4.3 Dielectric strength test
Carry out in accordance with Article 5.3 of GB4943.
6.5 Power supply adaptability test
6- 5. 1 AC power supply adaptability test GB/T4967—1995
Test the test samples according to the combination in Table 8, and use a 0.5-level voltmeter with a range not less than 1.5 times the power supply voltage. Each test time shall not be less than 15 minutes. During the test, the function specified in the product standard shall be tested. Table 8
6.5.2 DC power supply adaptability test
Use a 0.5-level DC voltmeter with a range not less than 1.5 times the power supply voltage to monitor the power supply voltage. Change the voltage value (the power supply is replaced by a DC variable voltage-regulated power supply) to 105% and 90% of the rated value respectively. During the test, the function specified in the product standard shall be tested. 6.6 Key inspection
Use visual inspection to check whether the keyboard arrangement is correct. Used to check whether the key press is flexible and the contact is reliable. Use a measuring tool with an accuracy of 0.02mm to check the key stroke, and use a pressure gauge with an error of no more than 10% to check the key pressure. Carry out the key life test on the special equipment "key life test bench", and the key pressure is based on the pressure measurement value of various models, so that it can be verified that the input data is the standard.
6.7 Electromagnetic compatibility test
6.7.1 The measurement method of the wireless interference limit value shall be carried out in accordance with the method specified in GB9254. During the test, the function specified in the product standard shall be tested. 6.7.2 Electromagnetic sensitivity test
6.7.2.1 Magnetic field sensitivity test
Carry out according to the test equipment and method specified in GB 6833.2. During the test, the function specified in the product standard shall be tested. 6.7.2.2 Electrostatic discharge sensitivity test
Carry out according to the test equipment and force method specified in GB6833.3. During the test discharge and discharge decay, the functions of the test samples shall be checked according to the provisions of the product standard. The test samples are allowed to make mistakes. After the discharge decays, the test samples shall be able to work normally. 6.7.2.3 Power transient sensitivity test
It shall be carried out according to the test equipment and methods specified in GB6833.4. During the spike signal sensitivity test, the functions of the test samples shall be checked according to the provisions of the product standard. The test samples shall be able to work normally. During the change of the positive transient and frequency transient sensitivity tests, the test samples are allowed to make mistakes. After 30 seconds after the transient change ends, the test samples shall be able to work normally. 6.7.2.4 Radiated and conducted sensitivity test
It shall be carried out according to the test equipment and methods specified in GB 6833.5 Radiated sensitivity test and GB 6833.6 Conducted sensitivity test. The test process shall be checked according to the functions specified in the product standard. 6.8 Environmental test
6.8.1 General requirements
The general principles and terminology of environmental test methods shall comply with the relevant provisions of G32421 and G132422. The initial and final tests specified in the following backup tests shall be subject to appearance and structural inspections, and their functions shall be inspected in accordance with the provisions of the product standard. The test samples shall be able to work normally and shall comply with the requirements of Articles 5.1 and 5.2. When changing the temperature during the test, the rate of temperature increase and decrease shall not exceed 1°C/min. After reaching temperature stability, the temperature change shall not exceed ±2%, the humidity change shall not exceed 2%, and there shall be no condensation. 6.8.2 Lower limit test
6.8.2.1 Lower limit test of operating temperature
GB/T 49671995
After the initial test of the test sample, the power supply shall be disconnected and the test shall be carried out according to GB2423.1\Test Ad\ Carry out the test, the severity level is the lower limit of the working temperature specified in Table 3, and maintain it for 2 hours after reaching the temperature stability. Then turn on the power of the test sample and inspect it according to the functions specified in the product standard.
6. 8. 2.2 Storage and transportation temperature lower limit test Put the power of the test sample in the disconnected position and connect GB 2423.1\Test Ab" for the test. The severity level is the lower limit of the storage and transportation temperature specified in Table 3. After reaching the leakage stability, store it for 2 hours. Recover for 2 hours and conduct the final test. In order to prevent frost or condensation on the test sample during the test, it is allowed to seal the test sample with polyethylene film before testing. If necessary, a desiccant can be placed in the sealing sleeve.
6-8.3 Temperature upper limit test
6.8-3.1 Working flow upper limit test
After the initial test of the test sample, turn the power on and press GB 2423.2\Test Bd\ Test. The severity level is the upper limit of the operating temperature specified in Table 3. After the temperature stabilizes, the test is carried out for 2 hours. During the test, the functions specified in the product standard are inspected. 6.8.3.2 Storage and transportation temperature upper limit test
Put the power supply of the test sample in the disconnected position and test according to GB 2423.2\Test Bb\. The severity level is the upper limit of the storage and transportation temperature specified in Table 3. After the temperature stabilizes, store it for 2 hours. Recover for 2 hours and conduct the final test. 6.8.4 Steady state damp heat test
6. 8.4. 1 Constant mixed heat test under working conditions After the initial test of the test sample, the power supply is disconnected and the test is carried out according to G12423.3* test Ca\. It is allowed to reach the upper limit of the working temperature and humidity specified in Table 3 within 1 hour. After 2 hours of the test, the dielectric strength is immediately tested and the final test is carried out. 6.8.4.2 Constant wet heat test under storage and transportation conditions The power supply of the test sample is disconnected and the test is carried out according to GB2423.3 test Ca\. It is allowed to reach the upper limit of the storage and transportation temperature and humidity specified in Table 3 within 1 hour and stored for 48 l. Recovery 2 h, and conduct the final inspection. 6.8.5 Vibration test
After the initial inspection, the test sample is fixed on the vibration table according to the working position, the power is turned off, and according to the values specified in Table 4, the vibration test is carried out in three mutually perpendicular axis directions in turn according to GB2423.10\Test Fc. For card-type and pocket calculators, only sweep frequency endurance test is carried out. 6.8.5.1 Initial vibration response check
The test is completed in a given frequency range on a sweep frequency cycle. The resonant frequency is recorded during the test, 6.8.5.2 Fixed frequency endurance test
Use The resonance frequency recorded in the initial vibration response check is subjected to a fixed frequency test. Within the specified frequency range of the test, if there is no obvious resonance frequency or the resonance frequency points exceed 3, the fixed frequency endurance test is not performed, and the swept frequency endurance test is performed.
6-8.5.3 Sweep frequency endurance test
According to the frequency range specified in Table 4, from low to high, and then from high to low, it is regarded as one cycle. The number of cycles is as specified in Table 4. For the test samples that have undergone the fixed frequency endurance test, the swept frequency endurance test is no longer performed. 6.8.5.4 Final vibration response check
For the test samples that have undergone the fixed frequency endurance test, this test is required. For the test samples that have undergone the swept frequency endurance test, the last swept frequency endurance test can be used as the final vibration response check. In this test, the recorded resonance frequency needs to be compared with the resonance frequency recorded in the initial vibration response check. If there is a significant change, the test sample should be trimmed and the test should be repeated. After the test, the final inspection is performed.
6. 8. 6 Impact test
GB/T4967—1995
The sample to be tested shall be initially tested, the power supply shall be placed in the disconnected position, and the test shall be carried out twice in each of the three mutually perpendicular axis directions according to the values specified in Table 5 according to the test Ea\ of GB2423.5. After the test, the final test shall be carried out. 6.8.7 Drop test
The sample to be tested shall be initially tested, the power supply shall be placed in the disconnected position, and the test shall be carried out according to the values specified in Table 6 according to the test Ec of GB2423.7. After the test, the final test shall be carried out.
The test table used for the drop test shall be covered with a 20 mm thick plywood and shall be in rigid contact with the cement floor. 6.8.8 Drop test for transport packaging
The sample to be tested shall be initially tested and placed in a state ready for transport, and pre-treated for 4 h according to the provisions of condition 6 in the table of clause 2.1 of GB4857.2.
Drop the transport package according to the requirements of 3.5.2 a of GB4857.5 and the specified values of Table 7 of this standard. Choose any four sides and drop each side once. After the test, check the damage of the package according to the provisions of the product standard. And conduct a final inspection on the test sample. 6.9 Reliability test
6.9.1 Test conditions
The comprehensive stress in the test cycle is stipulated as follows: Electric stress: When AC power is supplied, the test sample works within the variation range of % of the nominal value of the input voltage. When DC power is supplied, the test sample works within the range of 1%% of the nominal value of the voltage. The distribution of working time of various conditions in one cycle is: 25% of the upper limit of voltage, 50% of the nominal value, and 25% of the lower limit of voltage.
Temperature stress: The test sample rises from the normal temperature (the specific value is stipulated by the product standard) to the upper limit of the working temperature stipulated in Table 3 and then returns to normal temperature in one cycle. The average value of the temperature change rate is 0.7～1℃/min or other values specified by the product standard can be selected according to the special requirements of the test sample. The ratio of the duration of maintaining the upper limit value and the normal temperature in one cycle should be about 1:1. One cycle is called a cycle, and the number of cycles should not be less than 3 times during the total test period. The duration of each cycle should not be greater than 0.2ms, and the electrical stress and temperature stress should be applied at the same time. 6.9.2 Test plan
The plan of reliability identification test and reliability acceptance test shall be selected in accordance with GB5080.7 and specified in the product standard. During the entire test process, the power supply of the test sample is placed in the on position, and its function shall be checked at least every 4 hours according to the provisions of the product standard. The judgment criteria and counting methods of faults shall be in accordance with the provisions of Appendix A (Supplement), and only the number of related faults shall be counted. 6.9.3 Test time
The test time shall last until the total test time and the total number of faults can be accepted or rejected according to the selected test plan. When multiple test samples are tested, the test time of each test sample shall not be less than half of the average test time of all test samples. 7 Inspection rules
7.1 General provisions
Products must be inspected in accordance with the supplementary provisions of this standard and product standards during finalization (design finalization, production finalization) and production.
7.2 Inspection classification
Products shall pass the following inspections:
and. Finalization inspection;
b, delivery inspection;
c. Routine inspection.
The date and order of various inspection items shall be in accordance with the provisions of Table 9. If there are supplementary inspection items in the product standard, they shall be placed in the corresponding position of Table 9.
Inspection items
Appearance and structure
Function and performance
Earth leakage current
Electrical strength
Power adaptability
Electromagnetic compatibility
Lower temperature limit
Upper temperature limit
Constant damp heat
Transport package drop
Reliability identification
Reliability acceptance
Technical requirements
Note: “\ indicates the inspection items to be carried out. 7.3
Type inspection
CB/T4967
Test method
Type inspection
Products should pass the type inspection during design and production. 7. 3- 1
Delivery inspection
Routine inspection
Type inspection The quality inspection department of the product manufacturing unit or the quality inspection unit designated or entrusted by the superior competent department is responsible for the number of samples for reliability identification test in the type inspection as specified in Table 10, and the number of samples for other inspection items is not less than 2 units. Table 10
Number of units for batch or continuous production
97-200
More than 200
Maximum number of samples
Maximum Number of samples
7.3.4 If a fault occurs or a certain item fails during the final inspection (except for reliability identification), the inspection should be stopped. After finding out the cause of the fault, eliminating the fault and submitting a fault analysis report, the inspection should be repeated. If a fault occurs again or a certain item fails during the subsequent inspection, the final inspection should be repeated after finding out the cause of the fault, eliminating the fault and submitting a fault analysis report. The method for determining and counting faults in the reliability identification test during the final inspection is shown in Appendix A (Supplement), 7.3.5
Submit the finalization inspection report after inspection.
7.4 Acceptance inspection
GB/T 49671995
7.4.1 For batch-produced or continuously produced products, the performance inspection and appearance structure inspection shall be carried out in the acceptance inspection. The sampling inspection batch quality requirements shall not be lower than the qualified product requirements specified in Table 2 of SJ/T9528. The product standard shall specify the AQL value, inspection level and treatment method after rejection. The remaining inspection items shall be fully inspected. If any item fails in the inspection, it shall be re-inspected after repair. If any item fails again, the product shall be judged as a non-conforming product. 7.4.2 Acceptance inspection shall be carried out by the quality inspection department of the product manufacturing unit. 7.5 Routine inspection
7.5.1 For continuously produced products, if the annual output exceeds 10,000 units, a routine inspection shall be carried out once a year. When the annual production is less than 10,000 units, a routine inspection shall be carried out when the cumulative number reaches 10,000 units. 7.5.2 Routine inspection samples shall be randomly selected from the qualified batches of delivery inspection, and the number of samples for the reliability acceptance inspection items shall be as specified in Table 10, and the number of accompanying products for other inspections shall not be less than 2 units. Environmental tests shall be sampled and inspected in accordance with GB2829, and the batch quality requirements shall not be lower than the qualified product requirements specified in SJ/T9528. The batch quality requirements shall be specifically specified in the product standards. 7.5.3 The fault judgment and counting method of the reliability acceptance test in routine inspection shall be based on Appendix A (Supplement). The troubleshooting of the remaining items shall be carried out in accordance with the following provisions:
If a fault occurs during the inspection or any item fails, the cause of the fault shall be found out and a fault analysis report shall be submitted. After repair, the item shall be re-tested. After that, the following tests shall be carried out in sequence. If a fault occurs again or an item fails, the cause of the fault shall be found out, a fault analysis report shall be submitted, and after repair, the routine tests shall be re-performed. If a fault occurs again during the re-inspection or a basic item fails, it shall be judged as unqualified in the routine inspection.
The test samples subjected to the environmental test in the routine inspection shall be If it is printed with a mark, it should not be shipped as a genuine product. 7.5.4 A routine inspection report should be submitted after inspection. 8 Marking, packaging, transportation, storage
8.1 Marking
8.1.1 Product marking
The calculator should be marked with the product name, model, trademark, manufacturer name, and the year, month, and batch number of production. 8.1.2 Packaging marking
The packaging box should be marked with the product name, model, manufacturer name, address, and date of manufacture, and have transportation marks such as "Handle with care", "Afraid of moisture", and "Upward". The transportation marks should comply with the provisions of GB191. The markings on the packaging box should not fade, change color, or fall off due to transportation conditions or natural conditions. 8.2 Packaging
The packaging box should meet the requirements of moisture-proof, dust-proof, and dew-proof. A single packaging box (tray) should contain instructions for use, a guarantee card, an inspection certificate or inspection mark, and spare accessories.
8.3 Transportation
The packaged products should be able to be transported to the destination by any means of transportation. They should not be loaded in open cabins and carriages during long-distance transportation. They should not be stored in open warehouses during transit. During transportation, they are not allowed to be shipped in the same vehicle (or other transportation tools) as flammable, explosive, and corrosive items. The products are not allowed to be exposed to rain, snow, or liquid substances and mechanical damage. 8.4 Storage
The products should be placed in the original packaging boxes during storage. The temperature of the warehouse where the products are stored should be 0-40℃ and the relative humidity should be 30%-85%. There should be no flammable, explosive products, harmful gases, corrosive chemicals in the warehouse, and there should be no strong mechanical vibration, impact, and strong magnetic field. The packaging box should be at least 20cm above the ground and at least 50cm away from the wall, heat source, cold source, window or air inlet. The storage period is six months. If the storage exceeds six months during production, the delivery inspection should be carried out again. A1 Definition and interpretation of faults
GB/T49671995
Appendix A
Classification of faults
(Supplement)
According to the definition of faults specified in GB5271.14, any of the following situations is interpreted as a fault. a. One or more performance parameters of the test sample cannot be maintained between the upper and lower limits of the specified value under the specified conditions; b. When the test sample works within the specified stress range, mechanical parts or structural parts are damaged or stuck, or components fail or break, so that the test sample cannot complete its specified function. A2 Classification of faults
Fault types are divided into correlated faults (referred to as correlated faults) and non-correlated faults (referred to as non-correlated faults). Correlated faults are faults that are expected to occur in the test sample, usually caused by the conditions of the product itself. It is a failure that must be taken into account when interpreting the test results and calculating the reliability characteristic value. Non-related failures are unexpected failures of the test sample. Such failures are not caused by the conditions of the test sample itself, but are caused outside the test requirements. Non-related failures are not taken into account when interpreting the test results and calculating the reliability characteristic value. However, records should be made during the test for easy analysis and judgment.
A3 Criteria for related failures
Failures that must be replaced to eliminate components and parts; a.
b. Failures of consumable parts (such as batteries, etc.) during their lifespan; failures that cause unsafe or dangerous conditions for test and maintenance personnel or cause serious damage to the test sample and equipment and must be immediately terminated. Once such failures occur, a rejection decision should be made immediately; d. If two or more related failures occur at the same time due to factors other than the same, they should be taken into account in full. If they are caused by the same factor, only: times:
e. The inspection unit responsible for the confirmation test is qualified to identify a certain failure as a related failure based on the failure situation and analysis results. A4 Non-correlated fault judgment criteria
a. Dependent fault
Fault caused by failure of a component or part of the test sample or equipment failure that directly causes failure of another related component or part of the test sample, or caused by changes in test conditions beyond the specified range (such as sudden power failure, changes in grid voltage and frequency, changes in temperature, severe mechanical environmental changes and interference, etc.). b. Misuse fault
Fault caused by operator negligence, such as improper installation, failure caused by exceeding the specified stress conditions, etc. Induced sensitivity
Fault caused by the negligence of maintenance personnel during maintenance. d. The inspection unit responsible for the confirmation test is qualified to determine that a certain fault is a non-correlated fault based on the fault situation and analysis results. Additional remarks:
GB/T 4967--1995
This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard is drafted by Beijing Computer Factory No. 2. The main drafters of this standard are Yang Wenshan, Xie Senmao and Feng Hui.3 The fault determination and accounting methods for reliability acceptance tests in routine inspections are based on Appendix A (Supplement). The fault handling of the remaining items shall be carried out in accordance with the following provisions:
When a fault occurs during the inspection or any item fails, the cause of the fault shall be identified and a fault analysis report shall be submitted. After repair, the inspection shall be repeated. After that, the following inspections shall be carried out in sequence. If the fault occurs again or an item fails, the cause of the fault shall be identified, a fault analysis report shall be submitted, and then after repair, the routine inspections shall be carried out again. If the fault occurs again during the re-inspection or one item fails, it shall be judged as unqualified in the routine inspection.
The test samples subjected to the environmental test in the routine inspection shall be If it is printed with a mark, it should not be shipped as a genuine product. 7.5.4 A routine inspection report should be submitted after inspection. 8 Marking, packaging, transportation, storage
8.1 Marking
8.1.1 Product marking
The calculator should be marked with the product name, model, trademark, manufacturer name, and the year, month, and batch number of production. 8.1.2 Packaging marking
The packaging box should be marked with the product name, model, manufacturer name, address, and date of manufacture, and have transportation marks such as "Handle with care", "Afraid of moisture", and "Upward". The transportation marks should comply with the provisions of GB191. The markings on the packaging box should not fade, change color, or fall off due to transportation conditions or natural conditions. 8.2 Packaging
The packaging box should meet the requirements of moisture-proof, dust-proof, and dew-proof. A single packaging box (tray) should contain instructions for use, a guarantee card, an inspection certificate or inspection mark, and spare accessories.
8.3 Transportation
The packaged products should be able to be transported to the destination by any means of transportation. They should not be loaded in open cabins and carriages during long-distance transportation. They should not be stored in open warehouses during transit. During transportation, they are not allowed to be shipped in the same vehicle (or other transportation tools) as flammable, explosive, and corrosive items. The products are not allowed to be exposed to rain, snow, or liquid substances and mechanical damage. 8.4 Storage
The products should be placed in the original packaging boxes during storage. The temperature of the warehouse where the products are stored should be 0-40℃ and the relative humidity should be 30%-85%. There should be no flammable, explosive products, harmful gases, corrosive chemicals in the warehouse, and there should be no strong mechanical vibration, impact, and strong magnetic field. The packaging box should be at least 20cm above the ground and at least 50cm away from the wall, heat source, cold source, window or air inlet. The storage period is six months. If the storage exceeds six months during production, the delivery inspection should be carried out again. A1 Definition and interpretation of faults
GB/T49671995
Appendix A
Classification of faults
(Supplement)
According to the definition of faults specified in GB5271.14, any of the following situations is interpreted as a fault. a. One or more performance parameters of the test sample cannot be maintained between the upper and lower limits of the specified value under the specified conditions; b. When the test sample works within the specified stress range, mechanical parts or structural parts are damaged or stuck, or components fail or break, so that the test sample cannot complete its specified function. A2 Classification of faults
Fault types are divided into correlated faults (referred to as correlated faults) and non-correlated faults (referred to as non-correlated faults). Correlated faults are faults that are expected to occur in the test sample, usually caused by the conditions of the product itself. It is a failure that must be taken into account when interpreting the test results and calculating the reliability characteristic value. Non-related failures are unexpected failures of the test sample. Such failures are not caused by the conditions of the test sample itself, but are caused outside the test requirements. Non-related failures are not taken into account when interpreting the test results and calculating the reliability characteristic value. However, records should be made during the test for easy analysis and judgment.
A3 Criteria for related failures
Failures that must be replaced to eliminate components and parts; a.
b. Failures of consumable parts (such as batteries, etc.) during their lifespan; failures that cause unsafe or dangerous conditions for test and maintenance personnel or cause serious damage to the test sample and equipment and must be immediately terminated. Once such failures occur, a rejection decision should be made immediately; d. If two or more related failures occur at the same time due to factors other than the same, they should be taken into account in full. If they are caused by the same factor, only: times:
e. The inspection unit responsible for the confirmation test is qualified to identify a certain failure as a related failure based on the failure situation and analysis results. A4 Non-correlated fault judgment criteria
a. Dependent fault
Fault caused by failure of a component or part of the test sample or equipment failure that directly causes failure of another related component or part of the test sample, or caused by changes in test conditions beyond the specified range (such as sudden power failure, changes in grid voltage and frequency, changes in temperature, severe mechanical environmental changes and interference, etc.). b. Misuse fault
Fault caused by operator negligence, such as improper installation, failure caused by exceeding the specified stress conditions, etc. Induced sensitivity
Fault caused by the negligence of maintenance personnel during maintenance. d. The inspection unit responsible for the confirmation test is qualified to determine that a certain fault is a non-correlated fault based on the fault situation and analysis results. Additional remarks:
GB/T 4967--1995
This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard is drafted by Beijing Computer Factory No. 2. The main drafters of this standard are Yang Wenshan, Xie Senmao and Feng Hui.3 The fault determination and accounting methods for reliability acceptance tests in routine inspections are based on Appendix A (Supplement). The fault handling of the remaining items shall be carried out in accordance with the following provisions:
When a fault occurs during the inspection or any item fails, the cause of the fault shall be identified and a fault analysis report shall be submitted. After repair, the inspection shall be repeated. After that, the following inspections shall be carried out in sequence. If the fault occurs again or an item fails, the cause of the fault shall be identified, a fault analysis report shall be submitted, and then after repair, the routine inspections shall be carried out again. If the fault occurs again during the re-inspection or one item fails, it shall be judged as unqualified in the routine inspection.
The test samples subjected to the environmental test in the routine inspection shall be If it is printed with a mark, it should not be shipped as a genuine product. 7.5.4 A routine inspection report should be submitted after inspection. 8 Marking, packaging, transportation, storage
8.1 Marking
8.1.1 Product marking
The calculator should be marked with the product name, model, trademark, manufacturer name, and the year, month, and batch number of production. 8.1.2 Packaging marking
The packaging box should be marked with the product name, model, manufacturer name, address, and date of manufacture, and have transportation marks such as "Handle with care", "Afraid of moisture", and "Upward". The transportation marks should comply with the provisions of GB191. The markings on the packaging box should not fade, change color, or fall off due to transportation conditions or natural conditions. 8.2 Packaging
The packaging box should meet the requirements of moisture-proof, dust-proof, and dew-proof. A single packaging box (tray) should contain instructions for use, a guarantee card, an inspection certificate or inspection mark, and spare accessories.
8.3 Transportation
The packaged products should be able to be transported to the destination by any means of transportation. They should not be loaded in open cabins and carriages during long-distance transportation. They should not be stored in open warehouses during transit. During transportation, they are not allowed to be shipped in the same vehicle (or other transportation tools) as flammable, explosive, and corrosive items. The products are not allowed to be exposed to rain, snow, or liquid substances and mechanical damage. 8.4 Storage
The products should be placed in the original packaging boxes during storage. The temperature of the warehouse where the products are stored should be 0-40℃ and the relative humidity should be 30%-85%. There should be no flammable, explosive products, harmful gases, corrosive chemicals in the warehouse, and there should be no strong mechanical vibration, impact, and strong magnetic field. The packaging box should be at least 20cm above the ground and at least 50cm away from the wall, heat source, cold source, window or air inlet. The storage period is six months. If the storage exceeds six months during production, the delivery inspection should be carried out again. A1 Definition and interpretation of faults
GB/T49671995
Appendix A
Classification of faults
(Supplement)
According to the definition of faults specified in GB5271.14, any of the following situations is interpreted as a fault. a. One or more performance parameters of the test sample cannot be maintained between the upper and lower limits of the specified value under the specified conditions; b. When the test sample works within the specified stress range, mechanical parts or structural parts are damaged or stuck, or components fail or break, so that the test sample cannot complete its specified function. A2 Classification of faults
Fault types are divided into correlated faults (referred to as correlated faults) and non-correlated faults (referred to as non-correlated faults). Correlated faults are faults that are expected to occur in the test sample, usually caused by the conditions of the product itself. It is a failure that must be taken into account when interpreting the test results and calculating the reliability characteristic value. Non-related failures are unexpected failures of the test sample. Such failures are not caused by the conditions of the test sample itself, but are caused outside the test requirements. Non-related failures are not taken into account when interpreting the test results and calculating the reliability characteristic value. However, records should be made during the test for easy analysis and judgment.
A3 Criteria for related failures
Failures that must be replaced to eliminate components and parts; a.
b. Failures of consumable parts (such as batteries, etc.) during their lifespan; failures that cause unsafe or dangerous conditions for test and maintenance personnel or cause serious damage to the test sample and equipment and must be immediately terminated. Once such failures occur, a rejection decision should be made immediately; d. If two or more related failures occur at the same time due to factors other than the same, they should be taken into account in full. If they are caused by the same factor, only: times:
e. The inspection unit responsible for the confirmation test is qualified to identify a certain failure as a related failure based on the failure situation and analysis results. A4 Non-correlated fault judgment criteria
a. Dependent fault
Fault caused by failure of a component or part of the test sample or equipment failure that directly causes failure of another related component or part of the test sample, or caused by changes in test conditions beyond the specified range (such as sudden power failure, changes in grid voltage and frequency, changes in temperature, severe mechanical environmental changes and interference, etc.). b. Misuse fault
Fault caused by operator negligence, such as improper installation, failure caused by exceeding the specified stress conditions, etc. Induced sensitivity
Fault caused by the negligence of maintenance personnel during maintenance. d. The inspection unit responsible for the confirmation test is qualified to determine that a certain fault is a non-correlated fault based on the fault situation and analysis results. Additional remarks:
GB/T 4967--1995
This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard is drafted by Beijing Computer Factory No. 2. The main drafters of this standard are Yang Wenshan, Xie Senmao and Feng Hui.Failures of consumable parts (such as batteries, etc.) during their lifespan; failures that cause unsafe or dangerous conditions for testers and maintenance personnel or cause serious damage to the test samples and equipment and must be immediately terminated. Once such failures occur, a rejection decision should be made immediately; d. If two or more related failures occur at the same time and are not caused by the same factor, they should be counted in full. If they are caused by the same factor, only one failure is allowed:
e. The inspection unit responsible for the confirmation test is qualified to determine that a certain failure is a related failure based on the failure situation and analysis results. A4 Non-related failure criteria
a. Dependent failure
Failure caused by the failure of a component or part of the test sample or equipment failure that directly causes the failure of another related component or part of the test sample, or a failure caused by changes in test conditions that exceed the specified range (such as sudden power failure, changes in grid voltage and frequency, changes in temperature, severe mechanical environment changes and interference, etc.). b. Misuse failure
Failure caused by operator's fault, such as improper installation, exceeding the specified stress conditions, etc. Induced sensitivity
Failure caused by the fault of maintenance personnel during maintenance. d. The inspection unit responsible for the confirmation test is qualified to determine that a certain failure is a non-related failure based on the failure situation and analysis results. Additional notes:
GB/T 4967--1995
This standard was proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard was drafted by Beijing Computer Factory No. 2. The main drafters of this standard are Yang Wenshan, Jie Senmao, and Feng Hui.Failures of consumable parts (such as batteries, etc.) during their lifespan; failures that cause unsafe or dangerous conditions for testers and maintenance personnel or cause serious damage to the test samples and equipment and must be immediately terminated. Once such failures occur, a rejection decision should be made immediately; d. If two or more related failures occur at the same time and are not caused by the same factor, they should be counted in full. If they are caused by the same factor, only one failure is allowed:
e. The inspection unit responsible for the confirmation test is qualified to determine that a certain failure is a related failure based on the failure situation and analysis results. A4 Non-related failure criteria
a. Dependent failure
Failure caused by the failure of a component or part of the test sample or equipment failure that directly causes the failure of another related component or part of the test sample, or a failure caused by changes in test conditions that exceed the specified range (such as sudden power failure, changes in grid voltage and frequency, changes in temperature, severe mechanical environment changes and interference, etc.). b. Misuse failure
Failure caused by operator's fault, such as improper installation, exceeding the specified stress conditions, etc. Induced sensitivity
Failure caused by the fault of maintenance personnel during maintenance. d. The inspection unit responsible for the confirmation test is qualified to determine that a certain failure is a non-related failure based on the failure situation and analysis results. Additional notes:
GB/T 4967--1995
This standard was proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization Institute of the Ministry of Electronics Industry. This standard was drafted by Beijing Computer Factory No. 2. The main drafters of this standard are Yang Wenshan, Jie Senmao, and Feng Hui.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.