SJ 20665-1998 General specification for non-directional beacons

This specification specifies the requirements, quality assurance regulations and delivery preparation for non-directional beacons. This specification specifies non-directional beacons and is the basis for formulating product specifications. SJ 20665-1998 General Specification for Non-directional Beacons SJ20665-1998 Standard download decompression password: www.bzxz.net

Military standard for the electronics industry of the People's Republic of China FL5825
SJ20665—1998
General specification for
non - directional radio beacon1998-03-11Published
1998.05-01Implementation
Approved by the Ministry of Electronics Industry of the People's Republic of China1Scope
1.1 Subject matter
1.2 Applicable standards
2 Reference documents
3 Requirements
3.1 Qualification
3.2 Design
3.3 Structure
3.4 ​​Appearance quality
3.5 Dimensions
3.6 Weight
3.7 Color
3.8 Product logo and code
3.9 Maintainability
3. 10 Man-machine-environment system engineering
3.11 Safety...
3.12 Interchangeability...
3.13 Performance characteristics
Environmental requirements
Continuous working time,
3.16 Energy consumption requirements
Electromagnetic compatibility
Reliability
3.19 Packaging test,
4 Quality assurance regulations
4.1 Inspection qualifications
4.2 Inspection classification...
4.3 Inspection conditions
Identification inspection
Quality consistency inspection
4.6 Packaging inspection
· (2)
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4.7 Inspection method
5 Delivery preparation.
6 Notes
6.1 Intended use
6.2 Contents of order documents
1t1h1:
People's Republic of China Electronic Industry Military Standard General specification for
General specification for
non - directional radio beacon1 Scope
1.1 Subject content
This specification specifies the requirements, quality assurance regulations and delivery preparation for non-directional beacons. 1.2 Scope of application
This specification applies to non-directional beacons and is the basis for formulating product specifications. 2 Referenced Documents
GB3181—95 Standard Sample of Rattan Film Color
SJ 20665 -- 1998
GJB151.486 Requirements for electromagnetic emission and sensitivity of military equipment and subsystems Requirements for equipment and subsystems in ground installations (fixed and mobile, including tracked and wheeled vehicles) (Class A3) GJB152-86 Measurement of electromagnetic emission and sensitivity of military equipment and subsystems GJB179-86 Counting sampling inspection procedures and tables GJB367.1-87 General technical conditions for military communication equipment Design and manufacturing requirements GIB367.2-87 General technical conditions for military communication equipment Environmental test methods GJB367.587 General technical conditions for military communication equipment Packaging, transportation and storage requirements GIB 368.2-87 87
General specification for equipment maintainabilityBasic requirements for maintainabilityCJB368.587 General specification for equipment maintainabilityTesting and evaluation of maintainabilityGIB450-88 Reliability of equipment development and production9 Safety requirements for military communication equipment and systems
GJB 663 --- 89
Reliability identification and acceptance test
GJB 899 — 90
CJIB 900-90 System safety database
KIB13-88 Flight inspection specification for aeronautical radio navigation stations3 Requirements
3.1 Qualification identification
The non-directional beacon submitted in accordance with the product specification shall be a product that has been qualified through identification or finalized and approved. Ministry of Electronics Industry of the People's Republic of China Issued on March 11, 1998 Implemented on May 1, 1998
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3.2 Design
ST 20665 — 1998
The design of non-directional beacons shall comply with the relevant provisions of Chapter · of GJB367.1. When conducting reliability design, a product reliability assurance outline shall be drawn up in accordance with the provisions of GJB450. 3.3 Structure
The structure of non-directional beacons shall comply with the provisions of 1.15 of GJB367.1. The knobs on the panels of each part of the product shall be firmly installed, flexible to transport, and free of jamming, and the indicated positions of knobs and switches shall be accurate.
Each plug-in and drawer shall be pushed in and pulled out flexibly. The matching between the chassis and the panel and cover should be good. 3.4 Appearance quality
The surface coating of the non-directional beacon should be smooth, beautiful, uniform, and should not have defects such as bubbles, cracks, condensation and shedding. The text, symbols and logos should be clear and beautiful. 3.5 Size
The size is specified by the product specification.
3.6 Weight
The weight is specified by the product specification.
3.7 Color
Unless otherwise specified, the color of the chassis of the non-directional beacon should comply with the provisions of 1.20.1 in GJB367.1. 3.8 Product logo and code
The product should have the name, model, manufacturer, manufacturing date, number or production batch number and other logos. The basic numbering method of the product or part code is specified by the product specification. 3.9Maintainability
The maintainability of non-directional beacons shall comply with the requirements of 1.6 of CIB367.1 and GJB368.2, and the mean repair time (MT-TR) shall not exceed 1h.
3.10Man-machine-environment system engineering
The man-machine-environment system engineering of non-directional beacons shall comply with the provisions of 1.5 of GJB367.1. 3.11Safety
The safety requirements of non-directional beacons shall comply with the provisions of 1.8 of GJB367.1 and GJB663. 3.12Interchangeability
The interchangeability of non-directional beacons shall comply with the provisions of 1.7 of GJB367.1. The same extensions and plug-ins in the same model of non-directional beacons shall be interchangeable, and their performance indicators shall not be reduced after interchange. Whether adjustment is required shall be specified by the product specifications. 3.13 Performance characteristics
3.13.1 Non-directional beacon radio frequency characteristics
3.13.1.1 Carrier frequency (see 4.7.13.1.1) The carrier frequency range of the non-directional beacon is 100~1750kHz, and the specific indicators shall be specified by the product specifications. 3.13.1.2 Carrier frequency accuracy (exempt from 4.7.13.1.2) The carrier frequency accuracy shall not be less than ±5×10-53.13.1.3 Harmonic suppression (see 4.7.13.1.3) The second and third harmonics of the non-directional beacon shall be 60dB lower than the fundamental wave. 2
SJ 20665 -— 1998
3.13.1,4 RF output power (see 4.7.13.1.4) The RF output power series of the non-directional beacon is 50, 10X>. 200, 500, 1000)W, the specific parameters shall be specified by the product specification.
3.13.1.5 Phase jitter (see 4.7.13.1.5) The carrier signal phase jitter of the non-directional beacon shall be specified by the product specification. 3.13.2 Modulation characteristics
3.13.2.1 Modulation signal frequency (see 4.7.13.2.1) a. 400Hz;
b.1020Hz.
3.13.2.2 Modulation signal frequency readiness (see 4.7.13.2.2) a. 400 ± 25Hz;
b.1020±50Hzo
3.13.2.3 Modulation signal waveform distortion (see 4.7.13.2.3) The waveform distortion of each modulation signal shall not exceed 10%. 3.13.2.4 Modulation (see 4.7.13.2.4) The modulation should be 95%, and the error should not exceed ±4%. 3.13.2.5 Working category (see 4.7.13.2.5) Printing, audio report: uninterrupted carrier and keying. The on and off of an AM single tone is used as identification; b. Audio report plus AM words.
3.13.2.6 Identification signal (see 4.7.13.2.6) a. The identification signal consists of two or three international Morse code letters: b. The period of the identification signal is 8, 16, 30s 3.13.3 Antenna (see 4.7.13.3)
Antenna type: T-type, rod type;
Antenna resistance: 2~400;
Antenna capacitance: 250~10000PF.
3.13.4 Equipment format (see 4.7.13.4) The non-directional beacon should adopt a dual-mode mode of mutual master and standby. When the main machine fails, it should be able to automatically switch to the standby machine. When both the main and standby machines fail, they should be able to shut down immediately. While the main machine is working normally, the standby machine can be repaired.
3.13.5 Monitoring (see 4.7.13.5)
3.13.5.1 Monitoring characteristics
The non-directional beacon is equipped with a monitoring device that can continuously monitor the conditions specified in 3.13.5.2. If an alarm condition occurs, the monitoring device will issue an alarm to the control point, causing the main and standby machines to switch or shut down automatically. 3.13.5.2 Monitor alarm conditions
When one of the following conditions occurs, the monitor should issue an alarm a. The output power is reduced to less than 50% of the normal value; b. The modulation index is reduced to less than 50%;
C. Identification signal failure.
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3.13.5.3 Main and standby machine switching time
SI 20665 — 1998
Without special requirements, when any alarm in 3.13.5.2 occurs, the main and standby machine switching time should not exceed 30s. 3.13.6 Power supply (see 4.7.13.6)
3.13.6.1 Non-directional beacon adopts AC 220V, 50Hz or DC power supply, and the DC voltage value should be specified by the product specification. 3.13.6.2 When AC power supply is used, an uninterruptible power supply (UPS) or a floating backup DC power supply should be equipped. When the AC power supply is interrupted, the continuous working time should be greater than 2hg
3.13.6.3 The voltage variation range of the AC power supply is 220V±10%, and the frequency is 50Hz±5%: the voltage variation range of the DC power supply is not specified by the product specification.
3.14 Environmental requirements
3.14.1 Low air pressure
Low air pressure is specified by product specifications.
3.14.2 High temperature
a. The working temperature of indoor equipment (including vehicle-mounted equipment) is 55℃, and the storage temperature is 65℃; b. The working temperature of outdoor equipment is 55%, and the storage temperature is 70℃. 3.14.3 Low temperature
a. The working temperature of indoor equipment (including vehicle-mounted equipment) is -25%, and the storage temperature is -50; b. The working temperature of outdoor equipment is -45℃, and the storage temperature is -55℃. 3.14.4 Rain
Outdoor equipment should be able to withstand the rain test specified in GJB367.2 "410 Rain Test". 3.14.5 Humidity and heat
Non-directional beacons should be able to withstand the humidity and heat test specified in Table 1. Table
Temperature ℃
30 ~ 60
3.14.6 Mold
Relative humidity%
Test period 24h
Non-directional beacons should be able to withstand the mold test specified in "412 Mold Test" in GJB367.2, and the mold growth level is specified by the product specification.
3.14.7 Salt spray
Non-directional beacons should be able to withstand the salt spray test specified in "413 Salt spray test" in GJB367.2. 3.14.8 Vibration
Vehicle-mounted non-directional beacons should be able to withstand the vibration test specified in "409 Vibration Test" in GJB367.2 according to the vehicle model requirements.
3.14.9 Impact
Vehicle-mounted non-directional beacons should be able to withstand the vibration test specified in "409 Vibration Test" in GJB367.2 according to the vehicle model requirements. Subject to the impact waveform of Figure 408-1 or 408-2 in "408 Impact Test" in CJB367.2, and the mountain impact test specified in the severity level of Table 408-1. 3.14.10 Transportation
Non-directional beacons should be able to withstand the transportation test specified in "5.5 Highway Transportation Test" in GJB367.5: 4
3.15 Continuous working time (see 4.7.15) Non-directional beacons should be able to work continuously for 24h.
3.16 Energy consumption requirements (see 4.7.16)
Energy consumption requirements are specified by product specifications.
3,17 Electromagnetic compatibility
SJ 20665 1998
The electromagnetic compatibility of non-directional beacons should comply with the relevant requirements of GIB151.4. 3.18 Reliability
Unless otherwise specified, the lower limit value (6,) of the mean time between failures (MTBF) of the non-directional beacon shall not be less than [000H (single peach).
3.19 Packaging test
The packaging of the non-directional beacon shall comply with the provisions of Chapter 1 and 2 of GJB367.5. 4 Quality assurance provisions
4.1 Inspection responsibility
Unless otherwise specified in the contract or order, the contractor shall be responsible for completing all inspections specified in this specification. If necessary, the ordering party or the superior appraisal agency has the right to inspect any inspection item described in this specification. 4.1.1 Qualification responsibility
The product must meet all requirements of Chapter 3 and Chapter 5 of this specification. The inspections specified in this specification shall become an integral part of the contractor's entire inspection system or quality outline. 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 is not allowed to submit 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. Identification inspection:
b. Quality consistency inspection.
4.3 Inspection conditions
Unless otherwise specified, all inspections shall be carried out under the following normal test atmosphere conditions: temperature: 15 ~35℃;
Relative temperature: 20%~80%;
Pressure: the atmosphere of the test site.
4.4 Identification inspection
Identification inspection is generally only carried out when the product design and production are finalized, but when there are major changes in the main design, process, components and materials of the product, making the original identification conclusion inapplicable, identification inspection should also be carried out again. Identification inspection must be carried out in a laboratory approved by the ordering party or the superior identification agency. The samples subjected to identification inspection should be products produced by the production equipment and normal processes commonly used in production. 4.4.1 Inspection Items
The identification inspection items are shown in Table 2.
4.4.2 Sample Quantity
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SJ 20665 -- 1998
The number of samples for identification inspection shall be determined according to the size of the production identification batch, equipment cost and inspection fee, and the number of samples shall be specified by the product specification.
4.4.3 Qualification Criteria
When all inspection items meet the requirements specified in the product specification, the identification inspection shall be deemed qualified. If any inspection item does not meet the requirements specified in the product specification, the inspection shall be suspended. The contractor may continue the inspection after analyzing the unqualified items, finding out the causes of the defects and taking corrective measures. During the re-inspection, if all inspection items meet the requirements of the product specification, the identification inspection shall still be deemed qualified. If there is still an inspection item that does not meet the requirements specified in the product specification after the re-inspection, the identification inspection shall be deemed unqualified. 4.4.4 Maintenance of Qualification
To maintain the qualification, the contractor shall submit test data regularly according to the requirements of the ordering party. 4.5 Quality consistency inspection
4.5.1 Inspection grouping
Quality consistency inspection is divided into Group A, Group B, Group C and Group I inspection. 4.5.2 Group A inspection
100% (unit by unit) of all products in the inspection batch submitted by the contractor shall be subject to Group A inspection. The batch quality shall be stipulated by the product specification or contract.
4.5.2.1 Inspection items
Unless otherwise specified, the inspection items are shown in Table 2. Table 2
Appearance quality
Product logo and code
Maintainability
Man-machine-environment system engineering
Safety
Interchangeability
Carrier frequency
Carrier age rate accuracy
Surf suppression
Quality consistency inspection
Required
Chapter number
Inspection method
Chapter number
4.7.13. 1.1
4.7.13.1.2
1.7.13,1.3
RF output power
Phase jitter
Modulation signal frequency
Modulation signal frequency accuracy
Modulation signal waveform distortion
System
Work category
Identification signal
Equipment standard
Power supply
Low pressure
Continuous working time
Energy consumption requirements
Electromagnetic compatibility
Reliability
Packaging test
SJ 20665 -- 1998
Quality consistency inspection
Required
Chapter number
Note: Symbol "０" in the table means mandatory items, "A" means optional items, "" means no items. 4.5.2.2 Qualification criteria
Inspection method
Chapter number
4.7.13.1.4
4.7.13.1.5||tt| |4.7.13.2.1
4.7.13.2.2
4.7.13.2.3
4,.7.13.2.4
4.7.13.2.5
4.7.13.2.5
4.7.14.,8
4.7.14.10
The whole batch is evaluated by inspection one by one. According to the inspection results, if the number of defects found is not greater than the specified value, the batch is judged to be qualified for Group A inspection, otherwise the batch is judged to be unqualified for Group 4 inspection. TKAONKAa-
SI 20665 — 1998
Fateful defects are not allowed in Group A inspection. Once fatal defects are found, the batch is rejected. 4.5.2.3 Re-inspection.
For the batch that fails the Group A 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. The resubmitted batch shall be separated from the new batch and clearly marked with the "re-inspection batch" sign. During the re-inspection, the batch quality level shall be improved. If the re-inspection is qualified, the batch is judged to have passed the Group A inspection; if the re-inspection is still unqualified, the batch of products shall be rejected. 4.5.3 Group B inspection
4.5.3.1 Inspection items
The inspection items of Group B are shown in Table 2.
4.5.3.2 Sampling plan
Group B inspection should be carried out on the products of the Group A inspection qualified batch. Unless otherwise specified, the Group B sampling inspection shall be carried out in accordance with the relevant provisions of GJB179. A single positive belt sampling plan with special inspection level S-2 is adopted, and the acceptable quality level can be selected from Table 3. The defect classification is specified by the product specification.
Defect classification
Major defects
Minor defects
Acceptable quality level
4.5.3.3 Qualification criteria
According to the results of sample inspection, if the number of defects found in the sample is less than or equal to the qualified judgment number, the group B inspection is judged to be qualified, otherwise the group B inspection is judged to be unqualified. 4.5.3.4 Re-inspection
For batches that fail the group B inspection, the contractor shall analyze the batch of products, find out the cause of the defects and take corrective measures, and then resubmit for inspection. For resubmitted batches, stricter inspection shall be adopted. If the re-inspection is qualified, the batch is still judged to be qualified for the group B inspection; if the re-inspection is unqualified, the batch is judged to be unqualified for the group B inspection and rejected.
4.5.4 Sample processing
For defective samples in the batches that pass the group A and group B inspections, the contractor shall be responsible for repairing and delivering them in batches according to the contract or order after passing the inspection.
4.5.5 Group C Inspection
4.5.5.1 Inspection Items
The inspection items of Group C are shown in Table 2.
4.5.5.2 Sampling Plan
Group C inspection shall be conducted on the batches that have passed the inspections of Group A and Group B. When the batch output is less than or equal to 10 units, 1 unit shall be sampled, and when the batch output is greater than 10 units, 2 units shall be sampled for Group C inspection: 4.5.5.3 Qualification Criteria
When conducting Group C inspection, if all inspection items meet the requirements specified in the product specification, the Group C inspection shall be judged to be qualified: 8
SI 20665 1998
If any inspection item does not meet the requirements specified in the product specification, the Group C inspection shall be judged to be unqualified. 4.5.5.4 Re-inspection
If the sample fails to pass the Group C inspection, the acceptance and delivery of the product shall be stopped, and the contractor shall notify the qualification appraisal unit of the unqualified situation. After finding out the cause and taking corrective measures, all tests or inspections shall be carried out according to the opinions of the ordering party or the superior appraisal organization, or only the unqualified items shall be tested or inspected. When re-inspecting, the number of samples shall be doubled. If the re-inspection is still unqualified, the unqualified situation shall be notified to the superior appraisal organization. If the re-inspection is qualified, the C group inspection shall be judged to be qualified, and the acceptance and delivery of the product shall be resumed. 4.5.5.5 Inspection cycle
Unless otherwise specified, each submitted batch shall be subject to a C group inspection. 4.5.5.6 Sample processing
Unless otherwise specified, for samples that have passed the C group inspection, the contractor shall repair all found or potential damages and pass the A and B group inspections before delivery according to the contract or order. 4.5.6 D group inspection
4.5.6.1 Inspection items
The D group inspection items are shown in Table 2.
4.5.6.2 Number of samples
The D group inspection shall be conducted by sampling the products from the qualified batches of the A group, B group and C group inspections. The number of samples shall be specified by the product specification.
4.5.6.3 Failure
If the sample fails the D group inspection, the acceptance and delivery of the product shall be stopped. The contractor shall notify the appraisal unit of the failure. After taking corrective measures, all tests or inspections shall be repeated or only the failed items shall be tested or inspected according to the opinions of the superior appraisal organization. If the inspection is still unqualified, the superior appraisal organization shall be notified of the failure.
4.5.6.4 Inspection cycle
The D group inspection cycle shall be specified by the product specification.
4.5.6.5 Sample handling
Unless otherwise specified, the samples that have passed the D group inspection shall be repaired by the contractor. Replace all components that have exceeded half of their service life and are confirmed to be damaged during the test, and after passing the Group A and Group B inspections, they can be delivered according to the contract or order. 4.6 Packaging Inspection
The packaging inspection items, sampling plan and qualification criteria are specified by the product specifications. 4.7 Inspection Methods
4.7.1 General Requirements
4.7.1.1 Unless otherwise specified, when conducting tests, the voltage and frequency of the power supply used by the test instruments and equipment should be their rated values.
4.7.1.2 The performance of the test instruments and equipment used should meet the requirements of the performance indicators being tested, and their accuracy should be one order of magnitude or one third better than the accuracy of the lower indicators.
4.7.1.3 The test instruments and equipment used should be metrologically qualified and within the validity period. 4.7.2 Design
The design shall be inspected according to the drawings and materials of the non-directional beacon, 9
TTTKAONTKAca-2 Sampling plan
Group B inspection shall be conducted on products of Group A inspection qualified batches. Unless otherwise specified, Group B sampling inspection shall be conducted in accordance with the relevant provisions of GJB179. A single positive belt sampling plan with special inspection level S-2 is adopted, and the acceptable quality level is selected from Table 3. Defect classification is specified by the product specification.
Defect classification
Serious defects
Minor defects
Acceptable quality level
4.5.3.3 Qualification criteria
Based on the results of sample inspection, if the number of defects found in the sample is less than or equal to the qualified judgment number, the Group B inspection is judged to be qualified, otherwise the Group B inspection is judged to be unqualified. 4.5.3.4 Re-inspection
For batches that fail the Group B inspection, the contractor shall analyze the batch of products, find out the causes of the defects and take corrective measures, and then resubmit for inspection. For resubmitted batches, stricter inspection shall be adopted. If the re-inspection is qualified, the batch of Group B inspection is still judged to be qualified; if the re-inspection is unqualified, the batch of Group B inspection is judged to be unqualified and rejected.
4.5.4 Sample processing
For defective samples in the batches that have passed the Group A and Group B inspections, the contractor shall be responsible for repairing and delivering the whole batch according to the contract or order after passing the inspection.
4.5.5 Group C inspection
4,5.5.1 Inspection items
The inspection items of Group C are shown in Table 2.
4.5.5.2 Sampling plan
The Group C inspection shall be carried out on the batches that have passed the Group A and Group B inspections. When the batch production is less than or equal to 10 units, 1 unit shall be selected, and when the batch production is greater than 10 units, 2 units shall be selected for Group C inspection: 4.5.5.3 Qualification criteria
When conducting Group C inspection, if all inspection items meet the requirements specified in the product specification, the Group C inspection shall be judged to be qualified: 8
SI 20665 1998
If any inspection item does not meet the requirements specified in the product specification, the Group C inspection shall be judged to be unqualified. 4.5.5.4 Re-inspection
If the sample fails to pass the Group C inspection, the acceptance and delivery of the product shall be stopped, and the contractor shall notify the qualification appraisal unit of the unqualified situation. After finding out the reasons and taking corrective measures, all tests or inspections 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. When re-inspecting, the number of samples shall be doubled. If the re-inspection is still unqualified, the unqualified situation shall be notified to the superior appraisal agency. If the re-inspection is qualified, the Group C inspection shall be judged to be qualified, and the acceptance and delivery of the product shall be resumed. 4.5.5.5 Inspection cycle
Unless otherwise specified, each submitted batch shall be subject to a Group C inspection. 4.5.5.6 Sample handling
Unless otherwise specified, for samples that have passed the Group C inspection, the contractor shall repair all discovered or potential damage and pass the Group A and Group B inspections before delivery in accordance with the contract or order. 4.5.6 Group D inspection
4.5.6.1 Inspection items
The Group D inspection items are shown in Table 2.
4.5.6.2 Number of samples
Samples for Group D inspection shall be drawn from the products that have passed the Group A, Group B and Group C inspections. The number of samples shall be specified by the product specifications.
4.5.6.3 Failure
If the sample fails the Group D inspection, the acceptance and delivery of the product shall be stopped. The contractor shall notify the appraisal unit of the failure. After taking corrective measures, all tests or inspections shall be repeated or only the unqualified items shall be tested or inspected according to the opinions of the superior appraisal agency. If the inspection is still unqualified, the unqualified situation shall be notified to the superior appraisal agency.
4.5.6.4 Inspection cycle
The inspection cycle of Group D shall be specified by the product specification.
4.5.6.5 Sample processing
Unless otherwise specified, the samples inspected by Group D shall be repaired by the contractor. Replace all components that exceed half of their life span and are indeed damaged during the test, and after passing the Group A and Group B inspections, they can be delivered according to the contract or order. 4.6 Packaging inspection
Packaging inspection items, sampling plans and qualification criteria shall be specified by the product specifications. 4.7 Inspection methods
4.7.1 General requirements
4.7.1.1 Unless otherwise specified, when testing, the voltage and frequency of the power supply used by the test instruments and equipment shall be their rated values.
4.7.1.2 The performance of the test instruments and equipment used shall meet the requirements of the performance indicators being tested, and their accuracy shall be one order of magnitude or one third of the accuracy of the lower indicators.
4.7.1.3 The test instruments and equipment used shall be qualified by measurement and within the validity period. 4.7.2 Design
The design shall be checked according to the drawings and materials of the non-directional beacon, 9
TTTKAONTKAca-2 Sampling plan
Group B inspection shall be conducted on products of Group A inspection qualified batches. Unless otherwise specified, Group B sampling inspection shall be conducted in accordance with the relevant provisions of GJB179. A single positive belt sampling plan with special inspection level S-2 is adopted, and the acceptable quality level is selected from Table 3. Defect classification is specified by the product specification.
Defect classification
Serious defects
Minor defects
Acceptable quality level
4.5.3.3 Qualification criteria
Based on the results of sample inspection, if the number of defects found in the sample is less than or equal to the qualified judgment number, the Group B inspection is judged to be qualified, otherwise the Group B inspection is judged to be unqualified. 4.5.3.4 Re-inspection
For batches that fail the Group B inspection, the contractor shall analyze the batch of products, find out the causes of the defects and take corrective measures, and then resubmit for inspection. For resubmitted batches, stricter inspection shall be adopted. If the re-inspection is qualified, the batch of Group B inspection is still judged to be qualified; if the re-inspection is unqualified, the batch of Group B inspection is judged to be unqualified and rejected.
4.5.4 Sample processing
For defective samples in the batches that have passed the Group A and Group B inspections, the contractor shall be responsible for repairing and delivering the whole batch according to the contract or order after passing the inspection.
4.5.5 Group C inspection
4,5.5.1 Inspection items
The inspection items of Group C are shown in Table 2.
4.5.5.2 Sampling plan
The Group C inspection shall be carried out on the batches that have passed the Group A and Group B inspections. When the batch production is less than or equal to 10 units, 1 unit shall be selected, and when the batch production is greater than 10 units, 2 units shall be selected for Group C inspection: 4.5.5.3 Qualification criteria
When conducting Group C inspection, if all inspection items meet the requirements specified in the product specification, the Group C inspection shall be judged to be qualified: 8
SI 20665 1998
If any inspection item does not meet the requirements specified in the product specification, the Group C inspection shall be judged to be unqualified. 4.5.5.4 Re-inspection
If the sample fails to pass the Group C inspection, the acceptance and delivery of the product shall be stopped, and the contractor shall notify the qualification appraisal unit of the unqualified situation. After finding out the reasons and taking corrective measures, all tests or inspections 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. When re-inspecting, the number of samples shall be doubled. If the re-inspection is still unqualified, the unqualified situation shall be notified to the superior appraisal agency. If the re-inspection is qualified, the Group C inspection shall be judged to be qualified, and the acceptance and delivery of the product shall be resumed. 4.5.5.5 Inspection cycle
Unless otherwise specified, each submitted batch shall be subject to a Group C inspection. 4.5.5.6 Sample handling
Unless otherwise specified, for samples that have passed the Group C inspection, the contractor shall repair all discovered or potential damage and pass the Group A and Group B inspections before delivery in accordance with the contract or order. 4.5.6 Group D inspection
4.5.6.1 Inspection items
The Group D inspection items are shown in Table 2.
4.5.6.2 Number of samples
Samples for Group D inspection shall be drawn from the products that have passed the Group A, Group B and Group C inspections. The number of samples shall be specified by the product specifications.
4.5.6.3 Failure
If the sample fails the Group D inspection, the acceptance and delivery of the product shall be stopped. The contractor shall notify the appraisal unit of the failure. After taking corrective measures, all tests or inspections shall be repeated or only the unqualified items shall be tested or inspected according to the opinions of the superior appraisal agency. If the inspection is still unqualified, the unqualified situation shall be notified to the superior appraisal agency.
4.5.6.4 Inspection cycle
The inspection cycle of Group D shall be specified by the product specification.
4.5.6.5 Sample processingwwW.bzxz.Net
Unless otherwise specified, the samples inspected by Group D shall be repaired by the contractor. Replace all components that exceed half of their life span and are indeed damaged during the test, and after passing the Group A and Group B inspections, they can be delivered according to the contract or order. 4.6 Packaging inspection
Packaging inspection items, sampling plans and qualification criteria shall be specified by the product specifications. 4.7 Inspection methods
4.7.1 General requirements
4.7.1.1 Unless otherwise specified, when testing, the voltage and frequency of the power supply used by the test instruments and equipment shall be their rated values.
4.7.1.2 The performance of the test instruments and equipment used shall meet the requirements of the performance indicators being tested, and their accuracy shall be one order of magnitude or one third of the accuracy of the lower indicators.
4.7.1.3 The test instruments and equipment used shall be qualified by measurement and within the validity period. 4.7.2 Design
The design shall be checked according to the drawings and materials of the non-directional beacon, 9
TTTKAONTKAca-1.1 Unless otherwise specified, the voltage and frequency of the power supply used by the test instruments and equipment during the test shall be their rated values.
4.7.1.2 The performance of the test instruments and equipment used shall meet the requirements of the performance indicators being tested, and their accuracy shall be one order of magnitude or one third of the accuracy of the indicators.
4.7.1.3 The test instruments and equipment used shall be qualified by measurement and within the validity period. 4.7.2 Design
The design shall be checked according to the drawings and materials of the non-directional beacon, 9
TTTKAONTKAca-1.1 Unless otherwise specified, the voltage and frequency of the power supply used by the test instruments and equipment during the test shall be their rated values.
4.7.1.2 The performance of the test instruments and equipment used shall meet the requirements of the performance indicators being tested, and their accuracy shall be one order of magnitude or one third of the accuracy of the indicators.
4.7.1.3 The test instruments and equipment used shall be qualified by measurement and within the validity period. 4.7.2 Design
The design shall be checked according to the drawings and materials of the non-directional beacon, 9
TTTKAONTKAca-
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