Some standard content:
General Specifications for Line Matrix Printers 1 Subject Content and Scope of Application 1.1 Subject Content This standard specifies the general technical requirements for line matrix printers. The main contents include: terminology, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. GB 9312—88 1.2 Scope of Application This standard applies to line matrix printers with full-character impact printing. This standard is the basis for formulating product standards for line matrix printers. 2 Reference standards
GB1988 Information processing - Seven-bit coded characters for information exchange GB2425 Information processing - Shape and size of printed images of characters (common character groups) GB3261 Width of woven printing ribbons for office machines and printers for information processing GB4873
GB 191
Continuous format paper dimensions and delivery holes for information processing Packaging, storage and transportation graphic symbols
GB5793 Basic dimensions of ribbon shafts for drum line printers Safety of information technology equipment (including electrical business equipment) GB4943
GB9254 Radio interference limits and measurement methods for information technology equipment GB6833.2 Specification for electromagnetic compatibility test of electronic measuring instruments Magnetic field sensitivity test GB 6833.3
GR 6833. 4
Electronic measuring instrument electromagnetic compatibility test specification Electrostatic discharge sensitivity test Electronic measuring instrument electromagnetic compatibility test specification Power supply state sensitivity test Electronic measuring instrument electromagnetic compatibility test specification Radiated sensitivity test GB6833.5
3 Terminology
Electronic measuring instrument electromagnetic compatibility test specification Transmission sensitivity test 3.1 Line feed time
Refers to the time required from issuing a line paper feed command to giving a paper feed end signal. 3.2 Printing speed
The speed determined by the sum of the longest time required to print a whole line and the line feed time as the time to print a line. 3.3 Line width
The maximum number of characters that can be printed in a line.
3.4 Line spacing
The distance between the center lines of two adjacent lines of printed characters. 3.5 Character Spacing
1988-04-26 Approved by the Ministry of Electronics Industry of the People's Republic of China 19BB-12-1 for implementation
GB 9312-88
The distance between the center lines of two adjacent characters in a line of printed characters. 3.6 Linearity
The amount of deviation of a line of printed characters from the reference position. 3.7 Columnarity
The amount of deviation of a column of printed characters from the reference position. 3.8 Fixed Printing Method
A printing method that prints at a fixed time. 3.9 Random Printing Method
A printing method that does not print at a fixed time, that is, the line is wrapped after all the characters to be printed in the line are printed. The line is wrapped and printing is started after the line is wrapped.
3.10 Printing Error Rate
The ratio of the number of misprinted characters to the total number of printed characters.
4 Technical requirements
4.1 Environmental conditions
4.1.1 Climate environmental conditions
Climate environmental conditions are divided into two levels, see Table 1. Table 1
Temperature, ℃
Humidity, %
Atmospheric pressure, kPa
4.1.2 Mechanical environmental conditions
Storage, transportation
Storage, transportation
Mechanical environmental conditions are divided into two levels, see Table 2 and Table 3. 4.2 Adaptability to AC power supply
Single-phase: 220±22V, 501Hz
Three-phase: 380±38 V, 50±1Hz.
4.3 Main parameters
4.3.1 Characters
Characters should comply with the provisions of GB1988 and GB2425 common character group. 4.3.2 Line width can be selected from the following values:
80\), 120, 136 (132)\160 characters/line. Note: 1) is the preferred line width.
4.3.3 Line spacing
4.23mm and 3.18mm. It is also possible to select only 4. 23n line spacing. 4. 3.4 Character spacing
2.54mm and 2.12mm. It is also possible to select only 2.54mm character spacing. 4.4 Color ribbon
-40~40
93(40)
86-~106
The color ribbon should comply with the provisions of GB3261.
GB 9312—88
The ribbon reel size of the drum line printer shall comply with the provisions of GB5793. 4.5 Printing paper
The printing paper shall comply with the provisions of GB4873.
4.6 Printing quality
The characters to be printed must be complete and correctly identifiable. Page color tone is uniform; a.
b. Line degree; less than ±0.4 mm
Line degree: less than ±0.4 mm
Line spacing error: less than ±0.4 mmt
Line spacing cumulative error: Line spacing cumulative error is less than ±0.8 mm. 4.7 Appearance and structural requirements
The surface should not have obvious dents, scratches, cracks and deformation, and the surface coating should not bubble, crack or fall off. Metal parts should not have rust or other mechanical damage; b. Fasteners should not be loose:
Moving parts should be flexible and reliable;
d. Words, numbers, symbols and signs describing functions should be clear and correct. 4.8 Noise
The noise should not be greater than 70dB.
4.9 Reliability
The reliability level of the product adopts the unacceptable value m1 of the mean time between failures (MTBF), and specifies m, the value should not be less than 500h. The mean time to repair (MTTR) of the product is less than 30in. The printing error rate of the product is not more than 5×10-. 4.10 Electromagnetic compatibility
4.10.1 Radio interference limit value
The radio interference limit value of the product is divided into A and B levels, which should fully meet the requirements of Chapter 3 and Chapter 4 of GB9254. 4.10.2 Sensitivity
4.10.2.1 Magnetic field sensitivity
The magnetic field sensitivity of the product must meet the requirements of Chapter 1 of GB6833.2. 4.10.2.2. Electrostatic discharge sensitivity
The electrostatic discharge sensitivity of the product must meet the requirements of Chapter 1 of GB6833.3. 4.10.2.3 Power supply transient sensitivity
The power supply transient sensitivity of the product must meet the requirements of Chapter 1 of GB6833.4. 4.10.2.4 Radiated sensitivity
The radiated sensitivity of the product must meet the requirements of Chapter 1 of GB6833.5. 4.10.2.5 Conducted sensitivity
The conducted sensitivity of the product must meet the requirements of Chapter 1 of GB6833.6. 4.11 Safety requirements
The safety of the product must meet the requirements of GB4943. 4.11.1 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. 4.11.2 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. 4.12 Service life
Not less than 10 years under normal operation and maintenance: 4.13 Printing speed
Specified by the manufacturer in the product standard.
5 Test method
5.1 Test environment conditions
GB 9312-88
Except for the climate environment test and reliability test, all other tests shall be carried out under the following climate environment conditions: temperature: 15~35℃;
Relative humidity: 45%~75%;
Atmospheric pressure: 86~106 kPa.
5.2 Appearance and structure inspection
Use visual inspection to inspect. The product should meet the requirements of Article 4. 5.3 Safety requirements inspection
5.3.1 Safety inspection
Perform in accordance with the relevant provisions of GB4943.
5.3.2 Earth leakage current inspection
Perform in accordance with Article 5.2 of GB4943. The result should meet the requirements of Article 4.11.1. 5.3.3 Dielectric strength inspection
Perform in accordance with Article 5.3 of GB4943. However, no pretreatment is performed during the acceptance inspection. The result should meet the requirements of Article 4.11.2. 5.4 Power adaptability inspection
The voltage and frequency used by the printer should be adjusted according to the requirements of Article 4.Take the limit combination of the 2 requirements, pull the deviation respectively, and print for 10 minutes for each combination. The printer should be able to work normally.
5. 5 Performance index inspection
8. Perform functional inspection on various operation buttons. b. Check various alarm functions.
Printing quality inspection. It should print for 5 minutes in offline state, and then check the items specified in Article 4.6. c.
d. Continuous and stable operation inspection. Under normal working conditions, the printer should be able to work normally after continuous printing for 1 hour after powering on offline and printing various self-test codes in a loop.
5.6 Noise inspection
In the acoustic experiment, the printer prints in a random printing mode, and the "code change" noise is only placed 1m away from the printer. The average value of the values measured at four places in front, back and left should meet the requirements of Article 4.8. 5.7 Electromagnetic compatibility test
5.7.1 Radio interference limit value test
Perform in accordance with GB9254, and the measured value shall comply with the provisions of 4.10.1. 5.7.2 Sensitivity test
5.7.2.1 Magnetic field sensitivity test
Perform in accordance with Chapter 3 of GB6833.2, and the requirements of 4.10.2.1 shall be met. 5.7.2.2 Electrostatic discharge sensitivity test
Perform in accordance with Chapter 3 of GB6833.3, and the requirements of 4.10.2.2 shall be met. 5.7.2.3 Power supply de-state sensitivity test
Perform in accordance with Chapter 3 of GB6833.4, and the requirements of 4.10.2.3 shall be met. 5.7.2.4 Radiation sensitivity test
Test according to Chapter 3 of GB6833.5, and it shall meet the requirements of 4.10.2.4. 5.7.2.5 Conducted sensitivity test
GB 9312—88
Test according to Chapter 3 of GB6833.6, and it shall meet the requirements of 4.10.2.5. 5.8 Working temperature upper limit check
Place the printer in the test room, and raise the temperature to the upper limit temperature of the ambient temperature level 1 or level 1 in Article 4.1, with an allowable error of ±2°C. After keeping warm for 4 hours, power on and operate continuously for 4 hours, print for 5 minutes every hour, and print various self-test codes in a loop. The machine should be able to work normally. 5.9 Check the lower limit of working temperature
Place the printer in the test room, let the temperature drop to the lower limit temperature of the ambient temperature level 1 or level I in 4.1, allow the error of ±2℃, power on and work continuously for 4 hours, print for 5 minutes every hour, and print various self-check codes in a cycle. The machine should be able to work normally. 5.10 Low temperature storage test
Place the printer in the test room, let the temperature drop to the lower limit temperature specified in Table 1, allow the error of ±2℃, keep it for 4 hours, then restore the machine under normal working conditions for B h and blow off the condensation, and print various self-check codes in a cycle. It should be able to work normally. When doing this test, in order to prevent ice and condensation, the product can be sealed with polyethylene film before testing, and a desiccant can also be placed in the sealing sleeve.
5.11 High temperature storage test
Place the printer in the test room, let the temperature rise to the upper limit temperature specified in Table 1, allow the error of ±2℃, keep it for 4 hours, then restore the machine under normal working conditions for 4 hours. The machine should be able to work normally. 5.12 Wet heat storage test
Put the printer in the test room and raise the temperature to 40±2℃. After the temperature stabilizes for at least 1 hour, input water vapor and make the relative humidity reach 93% within 1 hour. Keep it for 24 hours, then restore the machine under normal working conditions for 12 hours, blow off the condensation, and the machine should be able to work normally. 5.13 Vibration test
5.13.1 Test requirements
Perform vibration test under power-off condition according to the requirements of Table 2. The machine should not have mechanical damage, and the fastening parts should not be loose. It should be able to work normally after power-on.
Resonance reduction
Together maintenance
Resonance cycle
5. 13.2 Test sequence
Frequency range, Hz
Sweep rate, oct/min
Drive amplitude, mm
Drive amplitude, mm
Time min
Frequency range, Hz
Drive amplitude, mm
Sweep rate, nct/min
Vibration direction
Working state
Number (times)
5~33~5
1.5(5~1H)
D, 75(10~25 Hz)
0.15(25~55Hz)
5~55~5
Vertical direction
Non-working state
Resonance search;
b. Resonance hold;
c. Vibration cycle;
d. Repeated resonance search.
GB 9312—88
5. 13.3 Resonance search
According to the provisions of Table 2, sweep frequency vibration is performed on the tested product, and the resonance points are recorded. When there are many resonance points, select 4 relatively close ones. 5.13.4 Resonance hold
For the resonance points of the tested product, the resonance hold test shall be performed according to the provisions of Table 2, and the amplitude of the main resonant components or assemblies shall be recorded. And the resonance transmission rate (Q value) shall be calculated. Where, Q is the resonance transmission rate,
A is the amplitude value of the resonance part, mm
A, is the driving amplitude value, mm.
For a T-level test product with no obvious resonance point in the range of 5 to 33 Hz, it shall be vibrated at a frequency of 33 Hz with an amplitude of 0.15 mm for 10 min.
For a 1-level test product with an obvious resonance point in the range of 5 to 55 Hz, it shall be vibrated at a frequency of 55 Hz with an amplitude of 0.15 mm for 10 min.
5.13.5 Vibration cycle
Perform a vibration cycle test on the test product as specified in Table 2. 5.13.6 Repeat resonance search
When repairs or improvement measures are taken during the vibration test, repeat the test of 5.13.3, and observe the frequency and resonance position of the resonance point, and compare with the records of the first resonance search. The resonance points of the withdrawn positions should not change significantly. If necessary, add the test of 5.13.4 to obtain comparative data.
5.14 Impact test
The power supply of the tested product is placed in the disconnected position, and the impact test is carried out according to the provisions of Table 3. After the test period expires, remove it for inspection of the appearance, which should meet the requirements of Article 4.7. After power is turned on, the machine should be able to work normally. Item
Acceleration + n/s*
Pulse width ms
Shock test
5.15 Reliability test
Number of shocks per minute
Total number of shocks
1000±10 (vertical)
5.15.1 Test conditions
Reliability tests are conducted on the products of each level according to the upper limit of the T. operating range specified in Table 1. The temperature change during the test should not exceed ±2℃.
5.15.2 Test plan
The reliability test is conducted according to the plan specified in GB5080.7. The selection of the specific plan is specified by the product standard. 5.15.3 Equipment utilization coefficient
GB 9312-88
The equipment utilization coefficient is 0.3, and the continuous printing is 18 minutes for every 1 hour of power-on. 5.15.4 Test time
The reliability test time shall be continued until a qualified or unqualified judgment can be made. The test time of each tested product shall not be less than half of the average test time of each tested product.
5.15.5 Number of test samples
The total number of samples for reliability test shall not be less than the requirements of Table 4. 5.15.6 The printing error rate test shall meet the requirements of Article 4.9. 5.16 Printing speed check
The line printer shall continuously self-test and print for 10 minutes in the offline state, and calculate the number of printed lines per minute, which shall meet the requirements of Article 4.13. 6 Inspection rules
The product must pass the specified tests during the finalization and production process. To determine whether the product meets the requirements specified in the standard. 6.1 Inspection classification
The product shall pass the following inspections:
Finalization inspection
b. Delivery inspection;
Routine inspection:
d. Reliability acceptance inspection.
6.2 Finalization inspection
6.2.1 Products should pass finalization inspection when they are designed or produced. Finalization inspection shall be conducted by the quality inspection department of the manufacturing unit or the unit designated by the superior main replacement department.
6.2.2 The items of finalization inspection include all the items specified for finalization inspection in Table 5 and other inspection items specified in the specific product standards.
6.2.3 The number of samples for finalization inspection shall not be less than 2 sets. 6.2.4 If a fault occurs during the test, or some items fail, the test should be stopped. Find out the cause of the fault, eliminate the fault, write a fault analysis report, and then conduct the test of the item. If the fault still occurs, find out the cause of the fault, eliminate the fault, write a fault analysis report, and re-run the finalization test. If the fault occurs again during the entire finalization test, the product is judged to fail the finalization test. 6.2.5 Acceptance or rejection of the reliability finalization test shall be determined according to the judgment criteria of the scheme selected by the specific product standard. Failure classification is shown in Appendix A (Supplement). The number of samples for reliability test shall be randomly selected according to the provisions of Table 4. 6.2.6 The finalization test report shall be submitted after the test. 6.3 Acceptance inspection
6.3.1 Acceptance inspection shall be carried out by the quality inspection department of the manufacturing unit or other quality inspection departments recognized by the state. 6.3.2 Acceptance inspection must be carried out on each unit.
6.3.3 The order of items for acceptance inspection shall be carried out according to the provisions for acceptance inspection in Table 5. 6.3.4 If any fault occurs during the test, the test shall be stopped, the cause of the fault shall be found out, the fault shall be eliminated, and the product shall be marked and re-tested. If the fault still occurs, the product shall be judged as unqualified. 6.4 Routine inspection
6.4.1 For batch-produced products, routine inspection shall be carried out for each batch, and for continuously produced products, routine inspection shall be carried out at least once a year. 6.4.2 Routine inspection shall be carried out by the quality inspection department of the manufacturing unit or other quality inspection departments recognized by the state, or by the unit designated by the superior competent department.
6.4.3 The samples for routine inspection shall be randomly selected from the products that have passed the delivery inspection, and the number shall not be less than 2. 6.4.4 The items and sequence of routine inspection shall be in accordance with the provisions of routine inspection in Table 5. 6.4.5 If a fault occurs during the test or any item fails, the cause of the fault shall be found out, the fault shall be eliminated, the product shall be marked, and then the test shall be continued or GB 9312-88
re-tested from the item. If a fault recurs or a certain item fails, the cause of the fault should be found out, the fault should be eliminated, and a fault analysis report should be submitted. Routine inspection should be carried out again. If a certain item fails again in the re-test, the batch of products shall be judged to have failed the routine inspection.
6.4.6 The test products that slightly pass the routine inspection must be marked with "routine inspection\". 6.4:7 A routine inspection report should be submitted after the routine inspection is completed. According to the user's requirements, the manufacturer should provide the routine inspection report of the year or the batch of products.
6.5 Reliability acceptance test
6.5.1 After the finalization, the batch-produced products shall undergo a reliability test once a batch, and the continuously produced products shall undergo a reliability test at least twice a year.
6.5.2 Acceptance or rejection of the reliability acceptance test shall be determined according to the specific product standards. The selected scheme is judged according to the judgment criteria. The failure classification is shown in Appendix A (Supplement). The number of samples for the reliability acceptance test is randomly selected according to the provisions of Table 4. Table 4
Batch size (sets)
97~200
Above 200
Inspection items
Appearance structure
Performance index
Print speed
Safety
Power adaptability
Electromagnetic compatibility
Specific product standards
Test method
Type inspection
Delivery inspection
Sample bulk (sets)
Routine inspection
Reliability acceptance test
Inspection items
Reliability
Test method
GB 9312--88
Continued Table 5
Type inspection
Delivery inspection
Note: the safety test in the delivery inspection only includes the sweet electric strength test and the ground leakage current test. 7 Marking, packaging, transportation, storage
Routine inspection
Reliability acceptance test
7.1 The outside of the packaging box should be marked with the manufacturer's name, product model, name, year, month and day of production, and the product certificate should be affixed, which includes the product name, specification, quantity, and inspector code. The outside of the packaging box should be printed or affixed with transportation labels such as "Caution Light", "Afraid of Wetness", and "Upwards". The transportation marks should comply with the provisions of the national standard GB191.
The printed or affixed marks on the outside of the packaging box should not fade or fall off due to transportation conditions and natural conditions. 7.2 The packaging box should meet the requirements of moisture-proof, dust-proof and anti-sac. The packaging box should contain a packing list, product certificate, accessories and related random documents.
7.3 The packaged products should be able to be transported to any place by any means of transportation. They should not be loaded in covered carriages or cabins during long-distance transportation, and should not be stored in open warehouses during transit. They should not be loaded in the same vehicle (or other means of transportation) with flammable, explosive, and corrosive items during transportation. And the products should not be exposed to boxes, snow, or liquid substances and mechanical damage. 7.4 The products should be stored in the original packaging box before use. The storage temperature of the warehouse for storing products should be 0~40℃ and the relative humidity should be 20%~80%. There should be no harmful gases, flammable, explosive items, and 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. It should be at least 50cm away from the wall, heat source, cold source, window or air inlet. The storage period under the conditions specified in this article, if there are no other provisions, should generally be six months. A1 Failure
GB 9312—88
Appendix A
Failure classification
(Supplement)
Partial or complete loss of working ability of the line printer. Resulting in the inability to complete or incorrect completion of the specified functions. A2 Associated failure
All failures caused by the conditions of the test product itself and expected to occur in quasi-field use. That is, failures that must be taken into account when interpreting test results or calculating reliability characteristics.
A3 Non-in-line failure
Failures that are not caused by the conditions of the test product itself, are not subject to test requirements, and are not expected to occur in field use. That is, failures that should not be taken into account when interpreting test results or calculating reliability characteristics. A4 Hardware failure
Any situation that disrupts the normal operation of the equipment and causes downtime or out-of-tolerance due to replacement of parts is a hardware failure and should be attributed to associated failures.
A5 Error shutdown
Error shutdown caused by equipment failure. If no repair is required and the test is repeated, this fault will automatically disappear and will not be attributed to associated failure. A6 Dependent failure
Failure caused by failure of associated parts and components will not be attributed to associated failure. A7 Misuse failure
Failure caused by failure to use the product as specified. Additional notes:
This standard was drafted by the State-owned Factory 734.
The main drafters of this standard are Zhang Yongming, Lin Shu'ai, Tao Liusheng, Wang Lijian and Bu Jian.If a certain item fails again during the re-test, the batch of products is judged to have failed the routine inspection.
6.4.6 The test products that slightly pass the routine inspection must be marked with the "routine inspection\" mark.6.4:7 A routine inspection report should be submitted after the routine inspection is completed. According to the user's requirements, the manufacturer should provide the routine inspection report for the year or the batch of products.
6.5 Reliability acceptance test
6.5.1 After the finalization, the batch-produced products should undergo a reliability test once per batch, and the continuously produced products should undergo reliability tests at least twice a year.
6.5.2 The acceptance or rejection of the reliability acceptance test shall be determined according to the judgment criteria of the scheme selected by the specific product standard. The failure classification is shown in Appendix A (supplement), the number of samples for reliability acceptance test shall be randomly selected according to the provisions of Table 4. Table 4
Batch size (sets)
97~200
200 and above
Inspection items
Appearance structure
Performance index
Printing speed
Safety
Power adaptability
Electromagnetic compatibility
Specific product standards
Test method
Type inspection
Delivery inspection
Sample bulk (sets)
Routine inspection
Reliability acceptance test
Inspection items
Reliability
Test method
GB 9312--88
Continued Table 5
Type inspection
Delivery inspection
Note: the safety test in the delivery inspection only includes the sweet electric strength test and the ground leakage current test. 7 Marking, packaging, transportation, storage
Routine inspection
Reliability acceptance test
7.1 The outside of the packaging box should be marked with the manufacturer's name, product model, name, year, month and day of production, and the product certificate should be affixed, which includes the product name, specification, quantity, and inspector code. The outside of the packaging box should be printed or affixed with transportation labels such as "Caution Light", "Afraid of Wetness", and "Upwards". The transportation marks should comply with the provisions of the national standard GB191.
The printed or affixed marks on the outside of the packaging box should not fade or fall off due to transportation conditions and natural conditions. 7.2 The packaging box should meet the requirements of moisture-proof, dust-proof and anti-sac. The packaging box should contain a packing list, product certificate, accessories and related random documents.
7.3 The packaged products should be able to be transported to any place by any means of transportation. They should not be loaded in covered carriages or cabins during long-distance transportation, and should not be stored in open warehouses during transit. They should not be loaded in the same vehicle (or other means of transportation) with flammable, explosive, and corrosive items during transportation. And the products should not be exposed to boxes, snow, or liquid substances and mechanical damage. 7.4 The products should be stored in the original packaging box before use. The storage temperature of the warehouse for storing products should be 0~40℃ and the relative humidity should be 20%~80%. There should be no harmful gases, flammable, explosive items, and 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. It should be at least 50cm away from the wall, heat source, cold source, window or air inlet. The storage period under the conditions specified in this article, if there are no other provisions, should generally be six months. A1 Failure
GB 9312—88
Appendix A
Failure classification
(Supplement)
Partial or complete loss of working ability of the line printer. Resulting in the inability to complete or incorrect completion of the specified functions. A2 Associated failure
All failures caused by the conditions of the test product itself and expected to occur in quasi-field use. That is, failures that must be taken into account when interpreting test results or calculating reliability characteristics.
A3 Non-in-line failure
Failures that are not caused by the conditions of the test product itself, are not subject to test requirements, and are not expected to occur in field use. That is, failures that should not be taken into account when interpreting test results or calculating reliability characteristics. A4 Hardware failure
Any situation that disrupts the normal operation of the equipment and causes downtime or out-of-tolerance due to replacement of parts is a hardware failure and should be attributed to associated failures.
A5 Error shutdown
Error shutdown caused by equipment failure. If no repair is required and the test is repeated, this fault will automatically disappear and will not be attributed to associated failure. A6 Dependent failure
Failure caused by failure of associated parts and components will not be attributed to associated failure. A7 Misuse failure
Failure caused by failure to use the product as specified. Additional notes:
This standard was drafted by the State-owned Factory 734.
The main drafters of this standard are Zhang Yongming, Lin Shu'ai, Tao Liusheng, Wang Lijian and Bu Jian.If a certain item fails again during the re-test, the batch of products is judged to have failed the routine inspection.
6.4.6 The test products that slightly pass the routine inspection must be marked with the "routine inspection\" mark.6.4:7 A routine inspection report should be submitted after the routine inspection is completed. According to the user's requirements, the manufacturer should provide the routine inspection report for the year or the batch of products.
6.5 Reliability acceptance test
6.5.1 After the finalization, the batch-produced products should undergo a reliability test once per batch, and the continuously produced products should undergo reliability tests at least twice a year.
6.5.2 The acceptance or rejection of the reliability acceptance test shall be determined according to the judgment criteria of the scheme selected by the specific product standard. The failure classification is shown in Appendix A (supplement), the number of samples for reliability acceptance test shall be randomly selected according to the provisions of Table 4. Table 4
Batch size (sets)
97~200
200 and above
Inspection items
Appearance structure
Performance index
Printing speed
Safety
Power adaptability
Electromagnetic compatibility
Specific product standards
Test method
Type inspection
Delivery inspection
Sample bulk (sets)
Routine inspection
Reliability acceptance test
Inspection items
Reliability
Test method
GB 9312--88
Continued Table 5
Type inspection
Delivery inspection
Note: the safety test in the delivery inspection only includes the sweet electric strength test and the ground leakage current test. 7 Marking, packaging, transportation, storage
Routine inspection
Reliability acceptance test
7.1 The outside of the packaging box should be marked with the manufacturer's name, product model, name, year, month and day of production, and the product certificate should be affixed, which includes the product name, specification, quantity, and inspector code. The outside of the packaging box should be printed or affixed with transportation labels such as "Caution Light", "Afraid of Wetness", and "Upwards". The transportation marks should comply with the provisions of the national standard GB191.
The printed or affixed marks on the outside of the packaging box should not fade or fall off due to transportation conditions and natural conditions. 7.2 The packaging box should meet the requirements of moisture-proof, dust-proof and anti-sac. The packaging box should contain a packing list, product certificate, accessories and related random documents.
7.3 The packaged products should be able to be transported to any place by any means of transportation. They should not be loaded in covered carriages or cabins during long-distance transportation, and should not be stored in open warehouses during transit. They should not be loaded in the same vehicle (or other means of transportation) with flammable, explosive, and corrosive items during transportation. And the products should not be exposed to boxes, snow, or liquid substances and mechanical damage. 7.4 The products should be stored in the original packaging box before use. The storage temperature of the warehouse for storing products should be 0~40℃ and the relative humidity should be 20%~80%. There should be no harmful gases, flammable, explosive items, and 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. It should be at least 50cm away from the wall, heat source, cold source, window or air inlet. The storage period under the conditions specified in this article, if there are no other provisions, should generally be six months. A1 Failure
GB 9312—88
Appendix A
Failure classification
(Supplement)
Partial or complete loss of working ability of the line printer. Resulting in the inability to complete or incorrect completion of the specified functions. A2 Associated failure
All failures caused by the conditions of the test product itself and expected to occur in quasi-field use. That is, failures that must be taken into account when interpreting test results or calculating reliability characteristics.
A3 Non-in-line failure
Failures that are not caused by the conditions of the test product itself, are not subject to test requirements, and are not expected to occur in field use. That is, failures that should not be taken into account when interpreting test results or calculating reliability characteristics. A4 Hardware failure
Any situation that disrupts the normal operation of the equipment and causes downtime or out-of-tolerance due to replacement of parts is a hardware failure and should be attributed to associated failures.
A5 Error shutdown
Error shutdown caused by equipment failure. If no repair is required and the test is repeated, this fault will automatically disappear and will not be attributed to associated failure. A6 Dependent failure
Failure caused by failure of associated parts and components will not be attributed to associated failure. A7 Misuse failure
Failure caused by failure to use the product as specified. Additional notes:
This standard was drafted by the State-owned Factory 734.
The main drafters of this standard are Zhang Yongming, Lin Shu'ai, Tao Liusheng, Wang Lijian and Bu Jian.4 The product should be stored in the original packaging box before use. The storage temperature of the storage product is 0~40℃ and the relative humidity is 20%~80%. No harmful gases, flammable, explosive items and corrosive chemicals are allowed 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. At least 50cm away from the wall, heat source, cold source, window or air inlet. The storage period under the conditions specified in this article, unless otherwise specified, should generally be six months. A1 Failure
GB 9312—88
Appendix A
Failure classification
(Supplement)
Partial or complete loss of working ability of the line printer. Resulting in the inability to complete or correctly complete the specified function. A2 Associated failure
All failures caused by the conditions of the test product itself and expected to occur in quasi-field use. That is, failures that must be taken into account when interpreting test results or calculating reliability characteristics.
A3 Non-in-line failure
Failure that is not caused by the conditions of the tested product itself, does not meet the test requirements, and is not expected to occur in field use. That is, failure that should not be included in the interpretation of test results or calculation of reliability characteristics. A4 Hardware failure
Any situation that disrupts the normal operation of the equipment and causes shutdown or out-of-tolerance due to replacement of parts is a hardware failure and should be attributed to associated failure.
A5 Error shutdown
Error shutdown caused by equipment failure. If no repair is required and the test is repeated, this failure will automatically disappear and is not attributed to associated failure. A6 Dependent failure
Failure caused by the failure of associated parts is not attributed to associated failure. A7 Misuse failure
Failure caused by not using the product as specified. Additional notes:
This standard was drafted by the State-owned Factory 734.
The main drafters of this standard are Zhang Yongming, Lin Shuai, Tao Liusheng, Wang Lijian and Bu Jian.4 The product should be stored in the original packaging box before use. The storage temperature of the storage product is 0~40℃ and the relative humidity is 20%~80%. No harmful gases, flammable, explosive items and corrosive chemicals are allowed 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. At least 50cm away from the wall, heat source, cold source, window or air inlet. The storage period under the conditions specified in this article, unless otherwise specified, should generally be six months. A1 Failure
GB 9312—88
Appendix A
Failure classification
(Supplement)
Partial or complete loss of working ability of the line printer. Resulting in the inability to complete or correctly complete the specified function. A2 Associated failure
All failures caused by the conditions of the test product itself and expected to occur in quasi-field use. That is, failures that must be taken into account when interpreting test results or calculating reliability characteristics.
A3 Non-in-line failurebzxz.net
Failure that is not caused by the conditions of the tested product itself, does not meet the test requirements, and is not expected to occur in field use. That is, failure that should not be included in the interpretation of test results or calculation of reliability characteristics. A4 Hardware failure
Any situation that disrupts the normal operation of the equipment and causes shutdown or out-of-tolerance due to replacement of parts is a hardware failure and should be attributed to associated failure.
A5 Error shutdown
Error shutdown caused by equipment failure. If no repair is required and the test is repeated, this failure will automatically disappear and is not attributed to associated failure. A6 Dependent failure
Failure caused by the failure of associated parts is not attributed to associated failure. A7 Misuse failure
Failure caused by not using the product as specified. Additional notes:
This standard was drafted by the State-owned Factory 734.
The main drafters of this standard are Zhang Yongming, Lin Shuai, Tao Liusheng, Wang Lijian and Bu Jian.
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