Some standard content:
Military standard of the electronics industry of the People's Republic of China FL5820
SJ 20690—1998
General specification for
tactical short wave receivers1998-03-18 Issued
1998-05-01 Implementation
Scope of approval by the Ministry of Electronics Industry of the People's Republic of China
1.1 Subject matter·
1.2 Scope of application
2 Reference documents
3 Requirements
3.1 Qualification
3.2 Components, parts and materials
Maintainability
Interchangeability
Performance characteristics
Safety
Environmental requirements·
Power supply and power consumption
Electromagnetic compatibility
Dimensions and weight
Color and surface condition
Appearance quality
Reliability
4 Quality assurance regulations
4.1 Inspection responsibility
Inspection classification
Inspection conditions
4.4 Appraisal inspection
Quality consistency inspection
Packaging inspection
Inspection method
Defect classification
5 Delivery preparation
6 Notes
Intended use
6.2 Contents of order documents
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1 Scope
General specification for shortwave tactical receivers for military standards of the electronics industry of the People's Republic of China
General specification for
tactical short wave receivers1.1 Subject content
SJ 206901998
This specification specifies the requirements, quality assurance regulations, delivery preparation and instructions for short wave tactical receivers (hereinafter referred to as receivers).
1.2 Scope of application
This specification applies to short wave tactical receivers for ground use. 2 References
GB/T6934-1995 Measurement methods for electrical properties of shortwave single-sideband receivers GJB151.4—86 Requirements for electromagnetic emission and sensitivity of military equipment and subsystems Requirements for equipment and subsystems in ground installations (fixed and mobile, including tracked weapons and wheeled vehicles) (Class A3)
GJB152—86 Measurement of electromagnetic emission and sensitivity of military equipment and subsystems GJB179A--96 Counting sampling inspection procedures and tables GJB367.1-87 General technical conditions for military communication equipment Design and manufacturing requirements GJB367.2--87 General technical conditions for military communication equipment Environmental test requirements GJB367.3 -87 General technical requirements for military communication equipment Reliability identification test and acceptance test methods GJB367.5--87 Technical conditions for military communication equipment Packaging, transportation and storage requirements GJB368A-94 Equipment maintainability outline GJB2072-94 Maintainability test evaluation
GJB1144-91 Tactical radio accessories, connector selection standard Shortwave single sideband communication equipment safety requirements
SJ20044--92
3 Requirements
3.1 Qualification
Ministry of Electronics Industry of the People's Republic of China 1998-03-18 Issued 1998-05-01 Implementation
SJ 20690—1998
Products submitted in accordance with this specification shall be qualified or approved products. 3.2 Components, parts and materials
The selection of components, parts and materials shall comply with the relevant provisions of Chapter 3 of GJB367.1. 3.3 Design
The design of the receiver shall comply with the provisions of Chapter 1 of GJB 367.1. 3.3.1 Functional characteristics
3.3.1.1 Minimum frequency interval of receiver RF: 100Hz. 3.3.1.2 Types of receiver operation: manual or automatic constant amplitude alarm (A1A or A1B), amplitude modulation speech (A3E), sideband speech (J3E).
3.3.1.3 Types of receiver intermediate frequency bandwidth: 3kHz and 17kHz, and automatically selected according to the type of operation. 3.3.1.4 Receiver gain control mode: automatic gain control (AGC), volume control. 3.3.1.5 The receiver RF frequency preset and selection methods are: a. Digital key input;
b. Quasi-continuous modulation input;
C. Directly call the stored channel:
d. Automatically search for preset channels.
3.3.1.6 The receiver should have the ability to store 10 groups of channel parameters, each group of channel parameters includes RF frequency and working type, and the stored channels can be called manually or automatically. 3.3.1.7 When the receiver searches for preset channels, it will pause the search after receiving the signal and wait for selection according to the specified time. 3.3.1.8 The beat frequency tone is automatically fixed at a frequency of 1000Hz. The pitch can be changed by fine-tuning the "quasi-continuous modulation" knob. bzxZ.net
3.3.1.9 The receiver should have a squelch control. 3.3.1.10 The receiver should have speaker monitoring and headphone monitoring. 3.3.1.11 The receiver should have an undervoltage alarm when the battery supply voltage is less than 10.5V. 3.3.1.12 The nickel storage battery used in the receiver can be directly connected to a 12V charger for charging. 3.3.1.13 The receiver should have lock control function, power-off protection function and dynamic fault detection function. 3.3.2 External interface and accessories
The external interface and accessories of the receiver should comply with the provisions of GJB1144. Specific accessories are specified by product specifications or contracts.
3.4 Maintainability
The qualitative requirements for the maintainability of the receiver should comply with the relevant provisions of GJB368A, and the mean time to repair (MTTR) should not exceed 15min.
3.5 Interchangeability
The interchangeability of the receiver should comply with the requirements of Article 1.7 of GJB367.1. After replacing the same components, assemblies and parts, the receiver should be able to work normally without adjustment; after a slight adjustment, it should be able to meet the performance characteristics requirements: -2-
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SJ20690—1998
After exchanging the modules, the performance characteristics of the receiver should meet the requirements. 3.6 Performance Characteristics
3.6.1 Frequency Error (See 4.7.6.1) Receiver Frequency Error: 2×10-6.
3.6.2 Frequency Stability (See 4.7.6.2) Receiver Frequency Stability: 1x10-6/d. 3.6.3 Reference Sensitivity (See 4.7.6.3) 3.6.3.1 When the receiver is in the working type of J3E, A1A or AIB, the reference sensitivity is: 2uV. 3.6.3.2 When the receiver is in A3E mode, the reference sensitivity is 7μV. 3.6.4 Large signal signal-to-noise ratio (see 4.7.6.4) When the receiver is in J3E mode, the large signal-to-noise ratio is 40dB. 3.6.5 Audio response (see 4.7.6.5) The audio response of the receiver in the audio range of 350~2850Hz should not be greater than 6dB. 3.6.6 IF selectivity (see 4.7.6.6) The ratio of the IF 40 dB bandwidth to the IF 6 dB bandwidth of the receiver should not be greater than 4. 3.6.7 Total distortion coefficient (see 4.7.6.7) The total distortion coefficient of the receiver is 7%.
3.6.8 Out-of-band intermodulation (see 4.7.6.8) The out-of-band intermodulation of the receiver is 70dBμV.
3.6.9 Blocking (see 4.7.6.9)
Receiver blocking voltage: 80 dBμV.
3.6.10 Reciprocal mixing (see 4.7.6.10) Receiver reciprocal mixing: 70 dBμV.
3.6.11 IF suppression ratio (see 4.7.6.11) Receiver IF suppression ratio: 70 dB.
3.6.12 Image suppression ratio (see 4.7.6.12) Receiver image suppression ratio: 75 dB.
3.6.13 Combined tone (see 4.7.6.13) The receiver frequency point is 10 dB greater than the noise level, not more than 20. 3.6.14 Gate gain control characteristics (see 4.7.6.14) When the receiver is in J3E mode, the input level is 7.5uV～7.5mV, and the output change should not exceed 6dB. When the receiver is in A3E mode, the input level is 30uV～30mV, and the output change should not exceed 6dB. 3.6.15 Volume control (see 4.7.6.15) Receiver volume control range: 40dB, maximum audio output: 17dBm: 3.6.16 Conducted spurious emission at the antenna end (see 4.7.6.16) 3 -
SJ 20690—1998
Conducted spurious emission at the receiver antenna end (reverse radiation level), for frequencies below 30MHz, not more than 20μV; for frequencies above 30MHz, not more than 100μV. 3.6.17 Frequency range (now 4.7.6.17) Receiver frequency range: 1.6～30MHz. 3.7 Safety
The receiver safety requirements shall comply with the provisions of SJ20044. 3.8 Environmental requirements
3.8.1 Temperature
Working temperature: -25~55°C
Storage temperature: -40~65°C
3.8.2 Dust
The receiver should be able to withstand the dust blowing test specified in Article 4.1 of "407 Dust Test" in GJB367.2 and the sand blowing test specified in Article 4.2.
3.8.3 Impact
The receiver should be able to withstand the basic design test specified in Table 408-1 of "408 Impact Test" in GJB367.2. 3.8.4, Toggle
The receiver should be able to withstand the vibration test specified in Curve V of Table 409~~1 of "409 Vibration Test" in GJB367.2.
3.8.5 Rain
The receiver should be able to withstand the rain test specified in Article 4.1 of "410 Rain Test" in GJB367.2. 3.8.6 Humidity
The receiver should be able to withstand the humidity test for ground communication equipment specified in Chapter 3 of "411 Humidity Test" in GJB 367.2.
3.8.7 Mold
The receiver should be able to withstand the mold test specified in Chapter 4 of "412 Mold Test" in GJB367.2. 3.8.8 Salt Spray
The receiver should be able to withstand the salt spray test specified in Chapter 4 of "413 Salt Spray Test" in GJB367.2. 3.9 Power supply and power consumption
3.9.1 Power supply
AC power supply: 220V±19%, 50±2Hzt Current consumption power supply: nickel storage battery pack, 12V±15%3.9.2 Power consumption
AC power consumption should not exceed 15W, DC power consumption should not exceed -4.5W3.10 Electromagnetic compatibility
The electromagnetic compatibility of the receiver should comply with the requirements specified in GJB151.4, and the specific test items shall be specified by the product specifications. 4-
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3.11 Dimensions and weight
SJ20690—1998
The maximum external dimensions of the receiver shall comply with the provisions of Appendix C (reference) of GJB367.1, and the weight of the receiver shall be specified by the product.
3.12 Color and surface condition
The color, surface processing and coating of the receiver shall comply with the provisions of Articles 1.20, 2.5 and 2.6 of GJB367.1. 3.13 Labeling
The labeling of the receiver shall comply with the provisions of Article 1.21 of GJB367.1. 3.14 Appearance quality
The receiver surface shall be free of rust, rust spots, peeling, scratches and burrs of the coating; plastic parts shall be free of blistering, cracking and deformation; words, symbols and signs shall be clear; structural parts and control components shall be complete; and there shall be no mechanical damage. 3.15 Reliability
The mean time between failures MTBF (6,) of the receiver shall not be less than 1000h. 4 Quality assurance provisions
4.1 Inspection responsibilities
Unless otherwise specified in the contract or order, the contractor shall be responsible for all inspections specified in the cost specification. The ordering party and the superior appraisal agency have the right to inspect any of the inspection items described in the specification when necessary. 4.1.1 Responsibility for Conformity
All products must meet all the requirements of Chapter 3 and Chapter 5 of the specification. The inspections specified in this specification shall become an integral part of the contractor's entire inspection system or quality program. If the contract includes inspection requirements not specified in this specification, the contractor shall also ensure that the products submitted for acceptance meet the contract requirements. Quality consistency sampling does not allow the submission of products that are known to be defective, nor can the ordering party be required to accept defective products. 4.2 Inspection Classification
The inspections specified in this specification are divided into:
a. Appraisal inspection;
b. Quality consistency inspection.
4.3 Inspection Conditions
Unless otherwise specified, various inspections shall be carried out in accordance with Article 2.1.1 of G3B367.2. 4.4 Appraisal Inspection
Appraisal inspection is generally carried out when the product design and production are finalized. When the main design, process, components and materials of the product have major changes that affect the important performance of the product and make the original identification results no longer valid, the adjustment inspection should also be carried out.
The adjustment inspection should be carried out in a laboratory approved by the ordering party or the superior identification agency. 4.4.1 Inspection items
See Table 1 for the identification inspection items.
4.4.2 Inspection samples
SJ 20690---1998
The identification inspection samples must be products that have passed the inspection of the quality inspection department of the contractor and have complete inspection records. The number of samples is generally two sets.
4.4.3 Qualification Criteria
When all inspection items meet the requirements of Chapter 3 and Chapter 5, the appraisal inspection is considered qualified. If any inspection item does not meet the requirements of Chapter 3 and Chapter 5 due to poor design or workmanship, the inspection should be suspended. The contractor should analyze the unqualified items, find out the causes of the defects and take corrective measures. Then, the unqualified items and related items can be inspected. If all inspection items meet the specified requirements, the appraisal inspection is still considered qualified: If there is still an item that does not meet the specified requirements after continued inspection, the appraisal inspection is considered unqualified.
4.4.4 Maintenance of Qualification of Appraisal
To maintain the qualification of appraisal inspection, the contractor should regularly provide product test data according to the requirements of the ordering party or the superior appraisal agency.
4.5 Quality Consistency Inspection
4.5.1 Inspection Grouping
Quality consistency inspection is divided into Group A, Group B, Group C and Group D inspection. 4.5.2 Formation of inspection batch
The formation of inspection batch shall comply with the provisions of Article 3.6 of GJB179. 4.5.3 Group A inspection
4.5.3.1 Inspection items
The inspection items of Group A are shown in Table 1.
Inspection items
Components, parts and materials
Maintainability
Interchangeability
Frequency error
Frequency stability
Base thrust sensitivity
Large signal signal-to-noise ratio
Audio frequency response
Quality consistency inspection
Instrument requirements
Chapter number
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Inspection method
Chapter number
Inspection items
Intermediate frequency selectivity||tt ||Total distortion factor
Out-of-band intermodulation
Reciprocal mixing
IF modulation ratio
Image rejection ratio
Conformity
Automatic gain control characteristics
Voice control
Conducted spurious content at the antenna end
Frequency range
Safety
Power supply and power consumption
Electromagnetic compatibility
Size and weight
Color and surface condition
Appearance quality
Trafficability
SJ 20690--1998
Continued Table 1
Quality consistency inspection
Note: "○" in the table is a mandatory item; "△" is an optional item; "-" is an item not required
Chapter number
Inspection method
Chapter number
4.5.3.2 Sampling plan
SJ 20690--1998
One hundred percent of the inspection batches submitted by the contractor shall be subject to A red inspection. The quality of the batch inspected by group A is expressed by the number of defects per hundred units of products. The acceptable number of defects per hundred units of products shall be agreed upon by the contractor and the ordering party or selected from the following values: number of serious defects: 10, 15: 25;
number of minor defects: 40, 65, 100.
The specific acceptable number of defects per hundred units of products shall be specified by the product specifications or contract. 4.5.3.3 Defect classification
Defect classification see 4.8
4.5.3.4 Qualification criteria
Based on the inspection results, calculate the number of defects per 100 units of products. If it is equal to or less than the specified acceptable value, the batch of Group A inspection is considered qualified. Otherwise, the batch of Group A inspection is considered unqualified: Group A inspection does not allow fatal defects, and if fatal defects are found, the batch is considered unqualified. 4.5.3.5 Re-inspection
For batches that fail the Group A inspection, the manufacturer shall analyze the batch, find out the cause of the defect and take corrective measures before resubmitting for inspection. The resubmitted batch shall be separated from the new batch and marked with "resubmitted batch".
If the re-inspection is qualified, the batch is still judged to have passed the Group A inspection: If the re-inspection is still unqualified: The batch is judged to have failed the Group A inspection.
4.5.4 Group B inspection
4.5.4.1 Inspection items
The Group B inspection items are shown in Table 1.
4.5.4.2 Sampling plan
Samples for Group B inspection shall be randomly selected from the qualified batches that have passed the Group A inspection. The sampling inspection of group B is carried out in accordance with the relevant provisions of GJB179, and a normal sampling plan with special inspection level S-3 is adopted. The acceptable quality level (AQL) of the continued batch is selected from the following values: Severe defect AQL: 4.0, 10, 15:
Minor defect AQL: 25, 40, 65.
The specific value of AQL is specified by the product specification or contract, and the corresponding limit quality (LQ) value of the isolated batch is specified in the contract in accordance with Article 4.5 of GJB179: 4.5.4.3 Defect classification
Defect classification see Article 4.8.
4.5.4.4 Qualification Criteria
According to the inspection results, if a fatal defect is found in the sample, the batch of products is judged to be unqualified for the B-level inspection. If the number of defects in the sample is not greater than the acceptance judgment number, the batch of products is judged to be unqualified for the B-level inspection. If not, the batch of products is judged to be unqualified for the B-level inspection.
4.5.4.5 Re-inspection
SJ 20690--1998
For the batch that fails the B-level inspection, the contractor shall analyze the batch of products, find out the cause of the defect and take corrective measures, and then resubmit it for inspection. During the re-inspection, the resubmitted batch shall be separated from the new batch, and marked with "resubmitted batch", and stricter inspection shall be adopted. If the re-inspection is qualified, the batch of products is still judged to be qualified for the B-level inspection; if the re-inspection is still unqualified, the batch of products is judged to be unqualified for the B-level inspection.
4.5.5 Sample handling for group A and group B inspections
If defective products are found in the batches that have passed the group A and group B inspections, the contractor shall be responsible for repairing them and the whole batch may be delivered according to the contract or order after they meet the requirements specified in the product specifications. 4.5.6 Group C inspection
4. 5. 6. 1 Inspection items
The inspection items for group C are shown in Table 1.
4.5.6.2 Sampling plan
Samples for group C inspections shall be randomly selected from the batches that have passed the group A and group B inspections. The sampling plan for group C inspection is: when the batch is less than 8 sets, select one set; when the batch is between 9 and 150 sets, select two sets; when the batch is greater than 150 sets, select three sets.
4.5.6.3 Qualification Criteria
When conducting Group C inspection, if all inspection items meet the requirements specified in Chapter 3 and Chapter 5, the Group C inspection is considered qualified. If any inspection item does not meet the requirements specified in Chapter 3 and Chapter 5 of the product, the Group C inspection is considered unqualified.
4.5.6.4 Re-inspection
If the product fails the Group C inspection: the acceptance and delivery of the product shall be stopped. The contractor shall report the unqualified condition to the ordering party or the superior appraisal agency. After finding out the cause and taking corrective measures, the product may be resubmitted for inspection. When re-inspecting, the number of samples shall be increased. The re-inspection shall be carried out according to the opinions of the ordering party or the superior appraisal agency. All tests or inspections shall be carried out, or only the unqualified items shall be tested or inspected. If the re-inspection is qualified, the Group C inspection is still considered qualified; if the re-inspection is still unqualified, the Group C inspection is considered unqualified.
4.5.6.5 Product Handling
Unless otherwise specified, samples that have passed the Group C inspection can be delivered according to the contract or order after the contractor repairs the discovered or potential damage and passes the Group A and Group B inspections. 4.5.6.6 Inspection Cycle
In any of the following situations, the submitted products shall be subject to Group C inspection: a. Isolated batch;
b. Continuous batch. The first submission of each production batch. The submission of batches every 6 months thereafter -9-
SJ 20690--1998
C. When there are major changes in the product structure, materials, process, etc. that may affect the product performance 4. 5.7 Dimensional Inspection
4.5.7.1 Inspection Items
See Table 1 for the inspection items.
4.5.7.2 Sampling plan
D group inspection shall be randomly selected from the products that have passed the inspection of group A and group B, and the number of samples shall be specified by the product specifications.
4.5.7.3 Sample processing
Unless otherwise specified, for samples that have passed the D group inspection, the contractor shall be responsible for repairing and replacing the parts that have consumed all or most of the design service life, and after passing the inspection of group A and group B, they can be delivered according to the contract or order. 4.5.7.4 Inspection cycle
In any of the following situations, the submitted products need to be inspected by group D: a. After the product is officially put into production, if there are changes in design, process, materials and key components that affect product quality: b. When the contract or order requires D group inspection, 4.5.8 Unqualified
If the sample fails the inspection of group C or group D, the acceptance and delivery of the product shall be stopped. The contractor shall inform the superior appraisal agency of the unqualified situation. After taking corrective measures, all tests or inspections should be repeated, or only the unqualified items should be tested or inspected according to the opinions of the superior appraisal agency. If the test is still unqualified, the unqualified situation should be notified to the qualified appraisal agency. 4.6 Packaging inspection
It shall be carried out in accordance with the relevant provisions of GB367.5.
4.7 Inspection method
4.7.1 General requirements
4.7.1.1 Test conditions
Unless otherwise specified, all inspections specified in this specification shall be carried out under the environmental conditions specified in Article 4.3 and the power supply conditions specified below:
AC power supply: 220V±2%, 50Hz±2%. 4.7.1.2 Measuring instruments and test devices
The accuracy of the measuring instrument shall be able to meet the accuracy requirements of the measured performance indicators, and within the period of metrological verification, the test device shall be able to provide the conditions required for the test. During the test, the test device shall maintain the specified accuracy. 4.7.2 General Inspection
The following aspects shall be measured or visually inspected using measuring tools in accordance with the product design drawings and documents: a. Components, parts and materials (see 3.2); 6. Dimensions and weight (see 3.11); c. Color and surface condition (see 3.12): - 10 -
TKANiKAca-5. Sample handling for group A and group B inspection
If defective products are found in the batches that have passed the group A and group B inspections, the contractor shall be responsible for repairing them and the batches can be delivered in accordance with the contract or order after they meet the requirements of the product specifications. 4.5.6. Group C inspection
4. 5. 6. 1 Inspection items
The inspection items of group C are shown in Table 1.
4.5.6.2 Sampling plan
Samples for group C inspection shall be randomly selected from the batches that have passed the group A and group B inspections. The sampling plan for group C inspection is: when the batch is less than 8 sets, select one set; when the batch is between 9 and 150 sets, select two sets; when the batch is greater than 150 sets, select three sets.
4.5.6.3 Qualification criteria
When conducting group C inspection, if all inspection items meet the requirements specified in Chapter 3 and Chapter 5, the group C inspection is considered qualified. If any of the inspection items do not meet the requirements of Chapter 3 and Chapter 5 of the product, the Group C inspection is judged to be unqualified.
4.5.6.4 Re-inspection
If the product fails the Group C inspection: the acceptance and delivery of the product shall be stopped. The contractor shall report the unqualified situation to the ordering party or the superior appraisal agency. After finding out the cause and taking corrective measures, the product may be resubmitted for inspection. When re-inspecting, the number of samples shall be increased. The re-inspection shall be carried out according to the opinions of the ordering party or the superior appraisal agency, or only the unqualified items shall be tested or inspected. If the re-inspection is qualified, the Group C inspection is still qualified; if the re-inspection is still unqualified, the Group C inspection is judged to be unqualified.
4.5.6.5 Product handling
Unless otherwise specified, the samples that have passed the Group C inspection can be delivered according to the contract or order after the contractor repairs the discovered or potential damage and passes the Group A and Group B inspections. 4.5.6.6 Inspection cycle
In any of the following situations, the submitted products shall be subject to Group C inspection: a. Isolated batch;
b Continuous batch The first submission of each production batch and the submission of batches every 6 months thereafter-9-
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C. When there are major changes in the structure, materials, process, etc. of the product, which may affect the product performance 4. 5.7 D-dimensional inspection
4.5.7.1 Inspection items
See Table 1 for the inspection items.
4.5.7.2 Sampling plan
The D-group inspection shall be randomly selected from the qualified batches of Group A and Group B inspections, and the number of samples shall be specified by the product specifications.
4.5.7.3 Sample handling
Unless otherwise specified, for samples that have been inspected by Group D, the contractor shall be responsible for repairing and replacing parts that have consumed all or most of the design service life, and can be delivered according to the contract or order after passing the Group A and Group B inspections. 4.5.7.4 Inspection cycle
In any of the following situations, the submitted products need to be inspected by Group D: a. After the product is officially put into production, if there are changes in design, process, materials and key components that affect product quality: b. When the contract or order requires Group D inspection, 4.5.8 Unqualified
If the sample fails to pass the Group C or Group D inspection, the acceptance and delivery of the product shall be stopped. The contractor shall inform the superior appraisal agency of the unqualified situation. After taking corrective measures, all tests or inspections shall be carried out again according to the opinions of the superior appraisal agency, or only the unqualified items shall be tested or inspected. If the test is still unqualified, the unqualified situation shall be notified to the qualified appraisal agency. 4.6 Packaging inspection
Carry out in accordance with the relevant provisions of GB367.5.
4.7 Inspection methods
4.7.1 General requirements
4.7.1.1 Test conditions
Unless otherwise specified, all inspections specified in this specification shall be carried out under the environmental conditions specified in Article 4.3 and the power supply conditions specified below:
AC power supply: 220V±2%, 50Hz±2%. 4.7.1.2 Measuring instruments and test devices
The accuracy of the measuring instrument shall be able to meet the accuracy requirements of the measured performance indicators, and within the period of metrological verification, the test device shall be able to provide the conditions required for the test, and during the test, the test device shall maintain the specified accuracy. 4.7.2 General Inspection
The following aspects shall be measured or visually inspected using measuring tools in accordance with the product design drawings and documents: a. Components, parts and materials (see 3.2); 6. Dimensions and weight (see 3.11); c. Color and surface condition (see 3.12): - 10 -
TKANiKAca-5. Sample handling for group A and group B inspection
If defective products are found in the batches that have passed the group A and group B inspections, the contractor shall be responsible for repairing them and the batches can be delivered in accordance with the contract or order after they meet the requirements of the product specifications. 4.5.6. Group C inspection
4. 5. 6. 1 Inspection items
The inspection items of group C are shown in Table 1.
4.5.6.2 Sampling plan
Samples for group C inspection shall be randomly selected from the batches that have passed the group A and group B inspections. The sampling plan for group C inspection is: when the batch is less than 8 sets, select one set; when the batch is between 9 and 150 sets, select two sets; when the batch is greater than 150 sets, select three sets.
4.5.6.3 Qualification criteria
When conducting group C inspection, if all inspection items meet the requirements specified in Chapter 3 and Chapter 5, the group C inspection is considered qualified. If any of the inspection items do not meet the requirements of Chapter 3 and Chapter 5 of the product, the Group C inspection is judged to be unqualified.
4.5.6.4 Re-inspection
If the product fails the Group C inspection: the acceptance and delivery of the product shall be stopped. The contractor shall report the unqualified situation to the ordering party or the superior appraisal agency. After finding out the cause and taking corrective measures, the product may be resubmitted for inspection. When re-inspecting, the number of samples shall be increased. The re-inspection shall be carried out according to the opinions of the ordering party or the superior appraisal agency, or only the unqualified items shall be tested or inspected. If the re-inspection is qualified, the Group C inspection is still qualified; if the re-inspection is still unqualified, the Group C inspection is judged to be unqualified.
4.5.6.5 Product handling
Unless otherwise specified, the samples that have passed the Group C inspection can be delivered according to the contract or order after the contractor repairs the discovered or potential damage and passes the Group A and Group B inspections. 4.5.6.6 Inspection cycle
In any of the following situations, the submitted products shall be subject to Group C inspection: a. Isolated batch;
b Continuous batch The first submission of each production batch and the submission of batches every 6 months thereafter-9-
SJ 20690--1998
C. When there are major changes in the structure, materials, process, etc. of the product, which may affect the product performance 4. 5.7 D-dimensional inspection
4.5.7.1 Inspection items
See Table 1 for the inspection items.
4.5.7.2 Sampling plan
The D-group inspection shall be randomly selected from the qualified batches of Group A and Group B inspections, and the number of samples shall be specified by the product specifications.
4.5.7.3 Sample handling
Unless otherwise specified, for samples that have been inspected by Group D, the contractor shall be responsible for repairing and replacing parts that have consumed all or most of the design service life, and can be delivered according to the contract or order after passing the Group A and Group B inspections. 4.5.7.4 Inspection cycle
In any of the following situations, the submitted products need to be inspected by Group D: a. After the product is officially put into production, if there are changes in design, process, materials and key components that affect product quality: b. When the contract or order requires Group D inspection, 4.5.8 Unqualified
If the sample fails to pass the Group C or Group D inspection, the acceptance and delivery of the product shall be stopped. The contractor shall inform the superior appraisal agency of the unqualified situation. After taking corrective measures, all tests or inspections shall be carried out again according to the opinions of the superior appraisal agency, or only the unqualified items shall be tested or inspected. If the test is still unqualified, the unqualified situation shall be notified to the qualified appraisal agency. 4.6 Packaging inspection
Carry out in accordance with the relevant provisions of GB367.5.
4.7 Inspection methods
4.7.1 General requirements
4.7.1.1 Test conditions
Unless otherwise specified, all inspections specified in this specification shall be carried out under the environmental conditions specified in Article 4.3 and the power supply conditions specified below:
AC power supply: 220V±2%, 50Hz±2%. 4.7.1.2 Measuring instruments and test devices
The accuracy of the measuring instrument shall be able to meet the accuracy requirements of the measured performance indicators, and within the period of metrological verification, the test device shall be able to provide the conditions required for the test, and during the test, the test device shall maintain the specified accuracy. 4.7.2 General Inspection
The following aspects shall be measured or visually inspected using measuring tools in accordance with the product design drawings and documents: a. Components, parts and materials (see 3.2); 6. Dimensions and weight (see 3.11); c. Color and surface condition (see 3.12): - 10 -
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c. Color and surface condition (see 3.12): - 10 -
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c. Color and surface condition (see 3.12): - 10 -
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