This standard specifies the general technical requirements, quality assurance regulations, and packaging, storage and transportation requirements for waveguide switches. This standard applies to manually or electromechanically controlled waveguide switches used to switch between different radio frequency paths. SJ 20051-1992 General Specification for Waveguide Switches SJ20051-1992 Standard Download Decompression Password: www.bzxz.net
This standard specifies the general technical requirements, quality assurance regulations, and packaging, storage and transportation requirements for waveguide switches. This standard applies to manually or electromechanically controlled waveguide switches used to switch between different radio frequency paths.

Military Standard FL5985 of the Electronic Industry of the People's Republic of China
1992-02-01 Issued
General specification for Waveguide switches
China Electronics Industry Corporation
SJ20051-92
1992-05-01 Implementation
: Approved
1 Scope
1.1 Subject Content
Military Standard of the Electronic Industry of the People's Republic of China General Specification for Waveguide Switches
General specification for
SJ20051-92
This standard specifies the general technical requirements, quality assurance provisions, and packaging, storage and transportation requirements for waveguide switches. 1.2 Scope
This standard applies to manually or electromechanically controlled waveguide switches used to switch between different radio frequency paths. 1.3 Military Component Number
The military component number shall consist of the industry military designation letters "JH", the detailed specification number, a specified component sequence number (see Section 3.1), and the letters S or F. Where S indicates a screened component and F indicates a non-screened component. Example:
JHXXX/XX-
Military Designation
Detailed Specification Number
2. Referenced Documents
001F or S
Component Sequence Number
Non-Screened Screened
The valid versions of the following standards form a part of this standard within the scope specified in this standard. GB191-90
GB192—81
GB193-81
GB196—81
GB197--81
GB3505-83
GB1173—86
GB3191—82
GB3193--82
GB3196—82
GB4437-—84
GB6892—86
GB8544—87
Packaging, storage and transportation pictorial signs
Ordinary thread
Basic tooth profile
Ordinary thread
Diameter and pitch series (diameter 1~600mm)Ordinary thread
Basic size (diameter 1~600mm)
Ordinary thread tolerance and fit (diameter 1~355mm)Surface roughness term surface and its parameters
Casting aluminum alloy
Aluminum and aluminum alloy extruded bars
Aluminum and aluminum alloy hot rolled plates
Aluminum and aluminum alloy wire for rivets
Aluminum and aluminum alloy hot extruded tubes
Aluminum and aluminum alloy for industrial use Gold extruded profiles
Aluminum and aluminum alloy strips
China Electronics Industry Corporation1992-02-01Implemented on 1992-05-01
GB1529—79
GB2041—89
GB2060—89
GB3110—-82
GB4424—-84
GB4425-84
GB2270—-80
GB4226—84
GB4232--84
GB4237 — 84 | | tt | GB6543—86
GJB360.1-87
GJB360.2—87
GJB360.6—87
GJB360. 787 | | tt | 90
SJ42—-77
SJ1743--81
SJ1744—81
SJ2553-84
3Requirements
3. 1 Detailed specification
Drawn brass tube
Brass plate
Brass strip
Brass wire
Ordinary brass rod
Leaded brass rod
SJ2005192
Stainless steel seamless steel tube
Stainless steel cold-worked steel rod
Stainless steel wire for cold heading
Stainless steel hot-rolled steel plate
Stainless steel cold-rolled steel strip
Waveguide flange Part 2: Ordinary rectangular waveguide flange specification Basic environmental test procedures for electrical and electronic products Low temperature/low pressure comprehensive test methods Communication equipment General technical conditions for product packaging Steel straps for packaging
Polyethylene blown film for packaging
Corrugated paperboard
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Salt spray test
Moisture resistance test
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Test methods for electronic and electrical components
Temperature shock test
Explosive atmosphere test
Test methods for electronic and electrical components
Sand and dust test||t t||Test methods for electronic and electrical components
Low frequency vibration test
Test methods for electronic and electrical componentsImpact (specified pulse) testTest methods for electronic and electrical componentsDielectric withstand voltage testGeneral technical conditions for military communication equipmentDesign and manufacturing requirementsGeneral specification for ridge waveguide flanges
Classification, characteristics, application scope and marking of metal coatings and chemical treatment layersX-type small round plug socket
Q-type small round plug socket
Standing wave measurement method for waveguide and coaxial components
The technical requirements of each product shall comply with the provisions of this standard and the corresponding detailed specifications. When there is a conflict between the requirements of this standard and the requirements of the detailed specifications, the detailed specifications shall prevail. 3.2 Identification
The waveguide switches provided in accordance with this standard shall be products that have been identified as qualified or approved for finalization (see Article 4.5). 2-
3.3 Materials
SJ20051-92
The materials of each product shall comply with the provisions of this standard and the relevant detailed specifications. However, when a certain material is not specified, a material that enables the switch to meet the performance requirements of this standard shall be used. The acceptance or approval of any material shall not be regarded as evidence of acceptance of the finished product. The material shall be selected from the following provisions:
Aluminum and aluminum alloy materials shall comply with the provisions of GB3196, GB3191GB3193, GB6892, GB4437GB8544 and a.
GB1173.
b. Stainless steel materials shall comply with the provisions of GB2270GB4226, GB4232, GB4237, GB4239. Brass materials shall comply with the provisions of GB1529, GB2041, GB2060GB3110, GB4424, GB4425. c.
Silver materials shall comply with the provisions of GB4135
Silver-coated copper or copper alloy shall have a chemical composition that complies with the first-grade silver in GB4135, and the minimum thickness of the silver coating is e.
0.12mm.
3.3.1 Incompatible metals
Incompatible metals that produce significant electrolytic corrosion should not be in direct contact without appropriate protection to prevent electrolytic corrosion. For the compatible coupling between metals, please refer to Appendix B.
3.3.2 Mildew resistance
The materials used to manufacture the switch shall be mildew-resistant or mildew-resistant and shall comply with the provisions of Appendix D of GJB367.1.
3.4. Design and structure
The structure and physical dimensions of the waveguide switch shall comply with the detailed specifications (see 3.1). 3.4.1 Operating frequency range
The operating frequency range shall comply with the detailed specifications (see 3.1). 3.4.2 Mode of operation
The switch shall be manually or electromechanically controlled. 3.4.2.1 Working voltage
When applicable, its rated working voltage shall comply with the detailed specifications (see 3.1). 3.4.3 Structure
The switch shall have the specified number of positions (see 3.1). 3.4.4 Threaded parts
The threads of all threaded parts shall comply with the provisions of GB192GB193, GB196, and GB197. Inserts shall be provided when it is required to increase the strength and durability of the mounting hole threads. 3.4.5 Diode suppression
When a diode is used for RF noise suppression, another diode shall be used for protection so that no excessive current is generated in the suppression diode when a reverse polarity voltage is applied to the excitation circuit. Unless otherwise specified, all suppression diodes shall be installed inside the switch housing.
3.4.6 Covers and seals for waveguides and connectors
The openings of the connectors and waveguides of the switch shall be covered and sealed to prevent damage during storage and the entry of moisture and foreign matter. 3.4.7 Connectors
The connectors used shall comply with the relevant provisions of SJ1743 and SJ1744. All connectors shall have a metal shell grounded to the metal shell of the waveguide switch. wwW.bzxz.Net
3.4.8 Waveguide flange
SJ20051—92
The end faces and mounting holes of the waveguide flange shall be able to be well matched with the waveguide flanges that comply with GB11449.2 and GJB975.
3.4.9 Welding terminals
Welding terminals shall comply with the relevant provisions of national or corresponding professional standards. 3.4.10 Indicator circuit
When specified (see 3.1), the switch shall be designed with separate contacts and lead terminals to control indicator lights or other devices that can indicate each position of the switch. 3.4.11 Interlock circuit
When specified (see 3.1), the switch shall be designed with separate contacts and lead terminals to control the output of the transmitter or other RF power source during switching or in any position. The interlock circuit shall be activated when the gyrator travel across the waveguide switch aperture is less than 6°. 3.4.12 Surface treatment
If not otherwise specified (see 3.1), the surface treatment shall be in accordance with 3.4.12.1 and 3.4.12.2. 3.4.12.1 Waveguide flange end face
The surface roughness of the waveguide flange end face of the switch shall have an arithmetic mean deviation Ra value of no more than 1.6μm. The definition of Ra shall comply with the provisions of GB3505. The aluminum alloy flange end face shall be chromated chemically in accordance with SJ42. 3.4.12.2 External surface
Except flange end faces and connectors, all external surfaces of the switch shall be painted with paint that complies with the provisions of the relevant national or professional standards.
3.4.13 Temperature range
The operating temperature range of the switch shall comply with the provisions of the detailed specification (see 3.1). 3.4.14 Weight
The weight of the switch shall not exceed the value specified in the detailed specification (see 3.1). 3.5 Screening
All switches to be screened produced in accordance with this standard shall be subjected to the inspection items specified in Table 3. After screening, the switches shall be subjected to Group A inspection.
3.6 Running-in
All electromechanical control switches produced in accordance with this standard shall be subjected to the running-in test as specified in 4.7.3. 3.7 Switch-on voltage
When the electromechanical control switch is tested in accordance with 4.7.4, its switch-on voltage shall not exceed the specified value (see 3.1). The measured on-voltage at the highest operating temperature shall not exceed 10% of the maximum specified value (see 3.1). 3.8 Off-voltage
When the electromechanical control switch with failure protection is tested in accordance with 4.7.5, its off-voltage shall be less than the specified value (see 3.1).
3.9 Working current
When the electromechanical control switch is tested in accordance with 4.7.6, its maximum working current shall not be greater than the specified value (see 3.1). It shall not exceed 25% of the maximum specified value when measured at the highest operating temperature. 3.10 Holding current
When the electromechanical control switch with failure protection is tested in accordance with 4.7.7, its holding current shall not be greater than the specified value (see 3.1). It shall not exceed 25% of the maximum specified value when measured at the lowest operating temperature. 4
SJ20051—92
3.11 Rotation delay of gyrator (when specified) (see 3.1) When the electromechanical control switch is tested in accordance with 4.7.8, the rotation delay time of the gyrator shall not be greater than the specified value (see 3.1).
3.12 Dielectric withstand voltage
When the electromechanical control switch is tested in accordance with 4.7.9, there shall be no voltage breakdown. 3.13 Transient interference (radio frequency interference) (when specified) (see 3.1) When the electromechanical control switch is tested in accordance with 4.7.10, the switch shall not conduct or radiate (radio frequency) noise voltage greater than the following specified values:
a. For DC controlled switches: the interference value shall not be greater than 50% or -150% of the rated line voltage (e.g., the interference limit value for DC 28V is ±42V peak value).
b. For switches controlled by AC: the interference value shall not be greater than the effective value of the rated line voltage ±2 times (e.g. the interference limit value of 110V AC is ±220V peak value). 3.14 Isolation
When the switch is tested in accordance with Article 4.7.11, the isolation between its excitation terminal and any other port shall not be less than the specified value (see Article 3.1).
3.15 Voltage Standing Wave Ratio
When the switch is tested in accordance with Article 4.7.12, its input loss shall not be greater than the specified value (see Article 3.1). 3.16 Insertion Loss
When the switch is tested in accordance with Article 4.7.13, its insertion loss shall not be greater than the specified value (see Article 3.1). 3.17 Transition Time
When the electromechanical control switch is tested in accordance with 4.7.14, the transition time between one position and the next adjacent position shall not be greater than the specified value (see 3.1) 3.18 RF Energy Leakage (when specified) (see 3.1) When the switch is tested in accordance with 4.7.15, the RF leakage shall not be greater than the specified value (see 3.1). 3.19 RF Power Transfer Capacity
When the switch is tested in accordance with 4.7.16, the switch shall not break down, burn, arc or overheat significantly when the specified RF power (see 3.1) passes through the switch. After the test, the isolation and insertion loss of the switch shall meet the requirements. Unless otherwise specified (see 3.1), the switch shall not be required to switch under power. 3.20 Life Cycles (see 3.1)
When the switch is tested in accordance with 4.7.17, the switch shall not show any physical damage or performance deterioration. After the test, its switching time, insertion loss, voltage standing wave ratio and isolation should not be inferior to the specified initial values ​​(see 3.1). 3.21 Temperature shock
When the electromechanical control switch is tested in accordance with the provisions of 4.7.18, the switch should be able to work reliably. After the test, the insertion loss, isolation and switching time of the switch should meet the requirements. 3.22 Low temperature and low pressure
When the electromechanical control switch is tested in accordance with the provisions of 4.7.19, the switch should not fail. The switch should work within the specified initial switching time (see 3.1) and withstand the dielectric withstand voltage test without breakdown (see 4.7.9). 3.23 Moisture resistance
When the electromechanical control switch is tested in accordance with the provisions of 4.7.20, the switch should be able to work reliably. After the test, the isolation, voltage standing wave ratio, insertion loss, holding current, on-voltage, off-voltage, conversion time, and gyrator rotation delay of the switch shall comply with the provisions of 5
.
3.24 Sealing (when specified) (see 3.1) SJ20051--92
When the sealed switch is tested under the specified pressure (3.1) in accordance with 4.7.21, the leakage rate of the switch gas shall not be greater than 8.44kPacm\/s (5 cubic centimeters per minute, standard atmospheric pressure) or there shall be no continuous bubbles precipitated from the switch, 3.25 Vibration
When the switch is tested in accordance with 4.7.22, there shall be no displacement or looseness of the parts. After the test, the isolation, voltage standing wave ratio, insertion loss, holding current, on-voltage, off-voltage, conversion time, and gyrator rotation delay of the switch shall comply with the provisions.
3.26 Impact (specified pulse)
When the switch is tested in accordance with 4.7.23, there should be no damage or looseness of the parts. After the test, the isolation, insertion loss and switching time of the switch should meet the requirements. 3.27 Explosion (when specified) (see 3.1) When the switch is tested in accordance with 4.7.24, there should be no explosion in the test chamber. After the test, the switching time of the switch should meet the requirements.
3.28 Salt spray (corrosion) (when specified) (see 3.1) When the switch is tested in accordance with 4.7.When the switch is tested in accordance with Article 25, rust and corrosion shall not appear on the surface of the switch. After the test, the switch's switching time, insertion loss and dielectric withstand voltage shall meet the requirements. 3.29 Sand and dust
When the electromechanical control switch is tested in accordance with Article 4.7.26, there shall be no sand and dust accumulation in the switch cover. 3.30 Post-test electrical test
After the environmental test, the post-test test shall be carried out in accordance with Article 4.7.27. The switch's switch-on voltage, switch-off voltage, operating current, holding current, gyrator rotation delay, dielectric withstand voltage, isolation, voltage standing wave ratio, insertion loss and switching time shall meet the requirements. 3.31 Marking
The switch shall be marked with the component number and the manufacturer's production batch number. In addition: a. The electromechanical control switch shall be marked with the power supply type, control voltage and frequency of the AC power supply. b. The waveguide port shall have a mark that can identify the input or output. Its marking shall still be clearly visible after all the specified environmental tests. 3.32 Appearance Quality
The appearance quality of the switch shall be uniform and the surface shall be free of dents, burrs, deep scratches and other defects that affect the life, function and appearance.
4 Quality Assurance Provisions
4.1 Responsibility for Inspection
Unless otherwise specified in the contract or order, the supplier shall be responsible for completing all inspections specified in this standard. If not otherwise specified in the contract or order, the supplier may use its own or other suitable equipment to complete the inspections specified in this standard with the permission of the superior appraisal agency. If necessary, the ordering party or the superior appraisal agency has the right to inspect any inspection item described in the standard. 4.1.1 Responsibility for Conformity
All products must comply with all requirements of Chapter 3 and Chapter 5 of this standard. The inspections specified in this standard shall become an integral part of the supplier's entire inspection system or quality program. If the contract includes inspection requirements not specified in this standard, the supplier shall also ensure that the products submitted for acceptance meet the contract requirements. 6
4.1.2 Test equipment and inspection devices
SJ20051—92
The supplier shall establish and maintain test and measuring equipment and inspection devices with sufficient accuracy, quantity and quality to check the required inspections. The supplier shall establish and maintain a calibration system to control the accuracy of the measuring and test equipment. 4.2 Inspection classification
The inspection classification specified in this standard is as follows:
Material inspection (see Article 4.3)
b. Identification inspection (see Article 4.5)
c. Quality consistency inspection (see Article 4.6)4.3 Material inspection
Material inspection shall be replaced by verification of certification information before production to ensure that the materials listed in Table 1 used in production meet the requirements of the corresponding standards.
Table 1 Inspection of materials
Aluminum alloy
LF21.LD30.LD31
Cast aluminum alloy
Stainless steel
lcr18ni9ri
Copper alloy
H62.Hpb59—1
Incompatible metals
Fungus resistance
Connectors
Waveguide flange
Surface treatment
4.4 Inspection conditions
Required clauses
Corresponding standards
GB3191.G B3193,GB3196,
GB4437.GB6892,GB8544
GB1178
GB2270,GB4226,
GB4232,CB4237,GB4239
GB1529,GB2041.GB2060,
GB3110,GB4424,GB4425
GB4135
See Appendix B
See Appendix D in GJB367.1 for reference)
SJ 1743,SJ1744
GB11449.2GJB975
GB3505.SJ42
Unless otherwise specified, all tests shall be conducted under the standard atmospheric pressure conditions specified in GJB360.1. 4.4.1 Deviations from the test methods
Deviations from the test methods specified in this standard are permitted, provided that they are demonstrated to the competent authority that they do not reduce the requirements of this standard in any way and are approved before testing. For the proposed test deviations, a corresponding error analysis of the test method shall be made for review and approval by the competent authority.
4.5 Qualification test (type test)
Qualification test shall be conducted at an inspection station (institute) approved by the government or competent authority. The sample units for qualification test shall be products produced by equipment and processes commonly used in production. The qualification obtained for each group (see Appendix A) shall constitute the qualification of all switches with the characteristics of the group.
1 group (all sample units)
Screening (see Table 3) (for screened switches)
Appearance and mechanical inspection (for non-screened switches)Run-in (for non-screened switches)
On voltage\
Off voltage"
Working current"
Holding current"
Gyrator rotation delay3)
Dielectric withstand voltage\
Transient interference (radiation interference)1.2)
Isolation
Voltage standing wave ratio
Capture loss
Switching time\
2 groups (two sample units)
RF energy leakage2|| tt||RF power transmission capacity
Life cycle
Post-test electrical test
3 groups (two sample units)
Temperature shock
Low temperature and low pressure\
Moisture resistance!
Sealed"
Shock (specified pulse)
Explosion"
Salt spray (corrosion)\
Sand and dust"
Post-test electrical test
Note: 1) Only for electromechanically controlled waveguide switches
2) When specified
3) Only for fail-safe electromechanically controlled waveguide switches 4.5.1 Sample size
Four switches should be taken for identification inspection.
4.5.2 Inspection Procedure
SJ20051—92
Table 2 Qualification Inspection
Requirement Clauses
3.1;3.4~3.4.12,3.4.14
3.31;3.32
Test Method Clauses
The samples shall be subjected to the qualification inspections specified in the order of Table 2. All sample units shall be subjected to one group of inspections, and then the samples shall be divided into two groups, each group consisting of two sample units (see Clause 4.5.1), and subjected to the inspections specified in the group. 4.5.3 Number of Failures
SJ20051—92
One or more failures shall be grounds for refusing to grant qualification approval. Any failure that does not meet the requirements of this standard shall be a failure.
4.5.4 Handling of Qualification Sample Units
Sample units that have undergone Qualification Inspection shall not be delivered to the ordering party. Sample units after Qualification Inspection shall be properly stored. 4.5.5 Maintenance of Qualification Inspection
To maintain Qualification Inspection, the manufacturer shall submit product inspection reports to the Qualification Inspection Agency on a regular basis every 24 months. If the product quality is good during two consecutive reporting periods, the reporting period may be changed from 24 months to 60 months, and the Qualification Inspection Agency shall determine the starting date of the report. Its inspection report shall include: a. Summary of test results of product delivery inspection (Group A), which shall at least indicate the number of qualified batches and the number of failed batches that have passed. And identify and explain the inspection results of all repaired batches. b. Summary of test results of periodic inspection (Group C), which shall indicate the number and failure mode of failure. The summary shall include the test results of all periodic inspections conducted and completed during the reporting period. If the test result summary indicates non-conformity with the standard requirements and no corrective measures are taken to the satisfaction of the Qualification Inspection Agency, the qualification of the product may be lost. Failure to submit a report within 60 days after the end of each reporting period may result in loss of qualification for product certification. In addition to periodic submission of inspection data, the manufacturer shall immediately notify the certification body at any time during the 24-month period when the inspection data indicates that the qualified product has expired. 4.6 Quality consistency inspection
4.6.1 Product delivery inspection
Product delivery inspection shall consist of Group A inspection and screening (when applicable). 4.6.1.1 Inspection batch
An inspection batch shall consist of all waveguide switches with the same component number, produced under essentially the same conditions, and submitted for inspection at the same time.
4.6.1.2 Screening
Screening shall consist of the inspection items specified in Table 3 and shall be carried out in the order listed in the table. Switches shall pass screening before being subjected to Group A inspection.
Table 3 Screening
Inspection items
Temperature shock
Appearance and mechanical inspection
4.6.1.3 Group A inspection
Requirements Clauses
3.1;3.4~3.4.12;
3.4.14,3.31 and 3.32
Test methods Clauses
Group A inspection shall consist of the inspection items specified in Table 4 and shall be carried out in the order listed in the table. 4.6.1.4 Sampling plan
All screened switches shall be subjected to screening inspection (see Table 3) and Group A inspection, and all non-screened switches shall be subjected to Group A inspection, and unqualified products shall be rejected.
4.6.1.5 Handling of sample units
Switches that have passed Group A inspection shall be delivered as per the contract or order. Inspection items
Appearance and mechanical inspection (for non-screening switches)Run-in test (for non-screening switches)
On voltage13
Off voltage3
Working current
Holding current"
Gyrator rotation delay2)
Dielectric withstand voltage1\
Transient interference (RF interference)1>.2)
Isolation
Voltage standing wave ratio
Insertion loss
Switching time1
Note: 1) Only for electromechanically controlled waveguide switches 2) When specified
SJ20051-92
Table 4 Group A inspection
Requirement clauses
3.1:3.4~3. 4.12;3.4.14
3.31:3.32
3) Only for all fail-safe electromechanically controlled waveguide switches 4.6.1.6 Rejected components
Test method clause
If an inspection component is rejected, the manufacturer may correct its defects by repair and resubmit it for re-inspection, but these repaired products should be isolated from new products and should be clearly marked as re-inspected components. 4.6.2 Periodic inspection!
Periodic inspections should consist of Group C inspections. Unless the results of these inspections indicate non-compliance with the corresponding requirements (see Section 4.6.2.5), the delivery of products that have passed Group A inspections should not be postponed until the completion of periodic inspections. 4.6.2.1 Group C inspection
Group C inspections should It consists of the inspection items specified in Table 5 and should be carried out in the order listed in the table. The sample units for Group C inspection should be drawn from the inspection batch that has passed the Group A inspection. Table 5 Group C inspection
Inspection items
Life cycle
Electrical test after test
4.6.2.2 Sampling plan
Requirement clause
Test method clause
Four sample units (see Section 4.5.1) should be drawn every 24 months for Group C inspection. The first inspection should be carried out within 24 months after the date of the appraisal notification.
4.6.2.3 Number of failures
If one or more sample units fail to pass the Group C inspection, the sample should be considered to have failed. 4.6.2.4 Sample unit Handling of positions
Sample units that have been subjected to Group C inspection shall not be delivered according to the contract or order. 4.6.2.5 Nonconformity
SJ20051--92
If a sample fails to pass the Group C inspection, the manufacturer shall take corrective measures in terms of material, process or both, and shall take corrective measures for all products produced under substantially the same conditions with the same material, process, etc.; and all products that are considered to be subject to the same failure mechanism. At this time, the acceptance of the product shall be interrupted until corrective measures are taken to the satisfaction of the competent authority. After taking corrective measures, the Group C inspection shall be repeated on the additional sample units (repeating the inspection of all inspection items or only the inspection of the failed items of the original sample, depending on the opinion of the competent authority). However, the final acceptance shall not be until the Group C re-inspection proves that the corrective measures are successful, at which time the Group A inspection can be restarted. If there are still failures after re-inspection, the relevant circumstances of the failure and the information on the corrective measures shall be submitted to the appraisal agency and the competent authority. 4.6.3 Packaging Inspection
The sampling inspection of packaging and marking of protective packaging and inner packaging, and the sampling inspection of packing and marking shall comply with the provisions of GB3873.
4.7 Inspection and Test Methods
4.7.1 Appearance and Mechanical Inspection
The switch shall be inspected to verify whether its material, design, structure, physical dimensions, coating, marking and appearance quality meet the applicable requirements (see 3.1; 3.4~3.4.12; 3.4.14; 3.31 and 3.32). 4.7.2 Screening (see 3.5)
The switch shall be screened in accordance with the provisions of 4.7.2.1~4.7.2.3. 4.7.2.1 Temperature Shock
The switch shall be tested in accordance with the provisions of 4.7.18, except that the running-in test shall be carried out after the temperature shock test, not after the post-test electrical test.
4.7.2.2 Running-in test
The switch shall be tested in accordance with 4.7.3
4.7.2.3 Appearance and mechanical inspection
The switch shall be inspected in accordance with 4.7.1. 4.7.3 Running-in (see 3.6)
The switch shall be operated 4800 times at a rate of not more than one position per second using the apparatus of Figure 1. One cycle shall consist of the switch being switched from its starting position to each of its other positions and then back to its starting position. For switches with externally used contacts (such as indicating circuit or interlocking circuit contacts), the contact resistance of the contacts shall be measured and recorded before and after the running-in test. Switches with a contact resistance increase of 10% shall not be delivered. Signal generator
Test switch
Timer
Figure 1 Running-in test and life cycle test device 4.7.4 Turn on the voltage (see 3.7)
Detector
Counter
Keep the switch at room temperature and connect a voltmeter directly across the input terminal of the selected position of the switch. Then slowly increase the drive voltage and record the actual voltage when the switch conversion action occurs. Repeat the test at each position where the switch needs to apply drive power. Repeat the above steps to test at the minimum and maximum operating temperatures specified for the switch (see 3.1).1 Group C inspection
Group C inspection shall consist of the inspection items specified in Table 5 and shall be carried out in the order listed in the table. Sample units for Group C inspection shall be selected from the inspection lot that has passed the Group A inspection. Table 5 Group C inspection
Inspection items
Life cycle
Post-test electrical test
4.6.2.2 Sampling plan
Requirement clause
Test method clause
Four sample units (see 4.5.1) shall be selected every 24 months for Group C inspection. The first inspection shall be carried out within 24 months after the date of the appraisal notice.
4.6.2.3 Number of failures
If one or more sample units fail to pass the Group C inspection, the sample shall be considered to have failed. 4.6.2.4 Handling of sample units
Sample units that have undergone Group C inspection shall not be delivered according to the contract or order. 4.6.2.5 Failure
SJ20051--92
If a sample fails to pass the Group C test, the manufacturer shall take corrective measures in terms of materials, processes or both, and shall take corrective measures for all products produced with the same materials, processes, etc. under substantially the same conditions; and all products that are considered to be subject to the same failure mechanism. At this time, the acceptance of the product shall be interrupted until corrective measures are taken to the satisfaction of the competent authority. After taking corrective measures, the Group C test shall be repeated on the additional sample units (repeating the test of all test items or only the test of the failed items of the original sample, depending on the opinion of the competent authority). However, the final acceptance shall not be until the Group C re-test proves that the corrective measures are successful, at which time the Group A test can be restarted. If there are still failures after the re-test, the relevant circumstances of the failure and the information on the corrective measures shall be submitted to the appraisal agency and the competent authority. 4.6.3 Packaging Inspection
The sampling inspection of packaging and markings of protective packaging and inner packaging, and the sampling inspection of packing and markings shall comply with the provisions of GB3873.
4.7 Inspection and Test Methods
4.7.1 Visual and Mechanical Inspection
Switches shall be inspected to verify that their materials, design, construction, physical dimensions, coating, marking, and appearance quality conform to the applicable requirements (see 3.1; 3.4 to 3.4.12; 3.4.14; 3.31 and 3.32). 4.7.2 Screening (see 3.5)
Switches shall be screened in accordance with 4.7.2.1 to 4.7.2.3. 4.7.2.1 Temperature Shock
Switches shall be tested in accordance with 4.7.18, except that the running-in test shall be performed after the temperature shock test instead of after the post-test electrical test.
4.7.2.2 Running-in test
The switch shall be tested in accordance with 4.7.3
4.7.2.3 Appearance and mechanical inspection
The switch shall be inspected in accordance with 4.7.1. 4.7.3 Running-in (see 3.6)
The switch shall be operated 4800 times at a rate of not more than one position per second using the apparatus of Figure 1. One cycle shall consist of the switch being switched from its starting position to each of its other positions and then back to its starting position. For switches with externally used contacts (such as indicating circuit or interlocking circuit contacts), the contact resistance of the contacts shall be measured and recorded before and after the running-in test. Switches with a contact resistance increase of 10% shall not be delivered. Signal generator
Test switch
Timer
Figure 1 Running-in test and life cycle test device 4.7.4 Turn on the voltage (see 3.7)
Detector
Counter
Keep the switch at room temperature and connect a voltmeter directly across the input terminal of the selected position of the switch. Then slowly increase the drive voltage and record the actual voltage when the switch conversion action occurs. Repeat the test at each position where the switch needs to apply drive power. Repeat the above steps to test at the minimum and maximum operating temperatures specified for the switch (see 3.1).1 Group C inspection
Group C inspection shall consist of the inspection items specified in Table 5 and shall be carried out in the order listed in the table. Sample units for Group C inspection shall be selected from the inspection lot that has passed the Group A inspection. Table 5 Group C inspection
Inspection items
Life cycle
Post-test electrical test
4.6.2.2 Sampling plan
Requirement clause
Test method clause
Four sample units (see 4.5.1) shall be selected every 24 months for Group C inspection. The first inspection shall be carried out within 24 months after the date of the appraisal notice.
4.6.2.3 Number of failures
If one or more sample units fail to pass the Group C inspection, the sample shall be considered to have failed. 4.6.2.4 Handling of sample units
Sample units that have undergone Group C inspection shall not be delivered according to the contract or order. 4.6.2.5 Failure
SJ20051--92
If a sample fails to pass the Group C test, the manufacturer shall take corrective measures in terms of materials, processes or both, and shall take corrective measures for all products produced with the same materials, processes, etc. under substantially the same conditions; and all products that are considered to be subject to the same failure mechanism. At this time, the acceptance of the product shall be interrupted until corrective measures are taken to the satisfaction of the competent authority. After taking corrective measures, the Group C test shall be repeated on the additional sample units (repeating the test of all test items or only the test of the failed items of the original sample, depending on the opinion of the competent authority). However, the final acceptance shall not be until the Group C re-test proves that the corrective measures are successful, at which time the Group A test can be restarted. If there are still failures after the re-test, the relevant circumstances of the failure and the information on the corrective measures shall be submitted to the appraisal agency and the competent authority. 4.6.3 Packaging Inspection
The sampling inspection of packaging and markings of protective packaging and inner packaging, and the sampling inspection of packing and markings shall comply with the provisions of GB3873.
4.7 Inspection and Test Methods
4.7.1 Visual and Mechanical Inspection
Switches shall be inspected to verify that their materials, design, construction, physical dimensions, coating, marking, and appearance quality conform to the applicable requirements (see 3.1; 3.4 to 3.4.12; 3.4.14; 3.31 and 3.32). 4.7.2 Screening (see 3.5)
Switches shall be screened in accordance with 4.7.2.1 to 4.7.2.3. 4.7.2.1 Temperature Shock
Switches shall be tested in accordance with 4.7.18, except that the running-in test shall be performed after the temperature shock test instead of after the post-test electrical test.
4.7.2.2 Running-in test
The switch shall be tested in accordance with 4.7.3
4.7.2.3 Appearance and mechanical inspection
The switch shall be inspected in accordance with 4.7.1. 4.7.3 Running-in (see 3.6)
The switch shall be operated 4800 times at a rate of not more than one position per second using the apparatus of Figure 1. One cycle shall consist of the switch being switched from its starting position to each of its other positions and then back to its starting position. For switches with externally used contacts (such as indicating circuit or interlocking circuit contacts), the contact resistance of the contacts shall be measured and recorded before and after the running-in test. Switches with a contact resistance increase of 10% shall not be delivered. Signal generator
Test switch
Timer
Figure 1 Running-in test and life cycle test device 4.7.4 Turn on the voltage (see 3.7)
Detector
Counter
Keep the switch at room temperature and connect a voltmeter directly across the input terminal of the selected position of the switch. Then slowly increase the drive voltage and record the actual voltage when the switch conversion action occurs. Repeat the test at each position where the switch needs to apply drive power. Repeat the above steps to test at the minimum and maximum operating temperatures specified for the switch (see 3.1).
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