Some standard content:
National Standard of the People's Republic of China
Generic specification
for camera tubes
(for certification)
GB 11478- 89
This specification applies to camera tubes (hereinafter referred to as electron tubes). It specifies the procedures for quality assessment and gives the test and test methods for optoelectronic parameters, mechanical, environmental and durability.
This specification is further supplemented by blank detailed specifications applicable to a specific type of electron tube. 1 General
1.1 Priority
Regardless of the reasons for the contradiction - the specifications (or documents) at all levels shall be implemented in the following order. a.
Detailed specification;
General specification;
Basic specification;
Related documents of China Electronic Components Quality Certification Committee: Other referenced documents (such as IEC documents),
1.2 Related documentswwW.bzxz.Net
GB3.100 International system of units and its application
GB4728.5 Graphic symbols for electrical diagrams Semiconductor tubes and inductors GB242～2424 Basic environmental testing procedures for electric and electronic products GR 191
GB 787
GR 4597
GB 2987
Packaging, storage and transportation pictorial symbols
Tube basic dimensions
Terminology of tubes
Parameter symbols of electron tubes
GB 11480
Camera tube test method
G13699.1~5996.14 Transmission TV test chart CB7274 Electron tube inter-electrode capacitance test method GB 5839
Rating system for tubes and semiconductor devices
[EC41C(1973) Sampling plan and procedure for inspection IEC 67 (1966) 1
Electrical standard
[FC151-26 (1971) Camera tube test method CECC13000-1980 Camera tube general specification
[FCQQC001002[EC Electronic Components Quality Assessment System Procedure Rules ZZR/01-001, National Electronic Components Quality Certification Regulations 1.3 Units, symbols and nouns
The units, graphic symbols, text symbols and nouns used for video cameras should be selected from the standards listed in Article 1.2. Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on March 21, 1989 and implemented on March 1, 1990
1.4 Marking
1.4.1 The electron tube shall have the following markings: a.
Manufacturing trademark;
Model:
Manufacturing number or year and month of production,
Qualification mark or certification mark;
Others.
GB 11478—89
The packaging box shall be marked with the relevant requirements of GB 191; the certified products shall have the certification mark. 1.4.3 When the electron tube uses materials that may cause harm, it shall be noted in accordance with the relevant national safety requirements. 2 Quality Assessment Procedure
2.1 Initial Manufacturing Stage
The initial manufacturing stage refers to the process of photosensitive surface formation, electron gun assembly and cathode activation. These processes should be under the supervision of the approved manufacturer, but are not required to be completed at the same location. Subcontracting these processes is prohibited.
2.2 Electrode tubes with similar structures
When several approved tube types with common performance are produced simultaneously or continuously, the inspection of their common performance can be carried out by sampling from one of the tube types, and the results can replace the inspection of other tube types. The common performance and related inspection items that can be adopted are as follows: tube shell and lead terminal
size,
lead terminal strength;
weldability;
constant humidity and heat.
Vibration of electrode structure including installation and positioning;
shock:
deflection sensitivity.
2.3 Approval Procedures
The manufacturer shall:
Meet the general requirements of the approval batch of QC001002; meet the requirements of the initial manufacturing stage of 2.1 of this specification.tb
Provide consistency inspection data for batch inspection and batch period inspection of three consecutive batches according to the requirements of the detailed specification. Samples shall be drawn in accordance with the provisions of IEC 410, using a normal inspection sampling plan, but when the sample size is the sample size with a pass judgment number of zero non-conforming products, the sample shall be increased to meet the sample size with a pass judgment number of 1 non-conforming product. 2.4 Supplementary Procedures for Approval of Approvals
When the production batch is at least 280 pieces, Table 1 is used instead of the normal sample size. Samples can be drawn from a production batch. When the number of non-conforming products exceeds the pass judgment number but is less than the non-conforming number, the second sample size shown in Table 1 shall be used. Group
Batch size
Within 280
Sample size
Note, 1) The number of samples approved for identification shall not be less than two. GB 11478-89
Qualified
2.5 Quality consistency inspection (see Chapter 12 of IECQQC001002) Unqualified
Number of judgments
Second sample
Total number of samples
Qualified
Unqualified
Number of judgments
Blank detail specifications shall specify the minimum inspection specification table for each detail specification. This specification table shall also be divided into groups for batch inspection and periodic inspection.
To be applicable to different assessment levels, blank detail specifications may be listed in multiple specification tables. 2.6 Sampling requirements for small batches or expensive tubes When the batch indicates that a sampling plan with a qualified judgment number of zero is adopted at the specified acceptable quality level (AQL) and inspection level IL, any of the following methods may be used instead based on the opinion of the chief inspector and with the approval of the national supervision and inspection agency. 2.6.1 100% inspection.
2.6.2 Sampling plan with a larger sample with a qualified judgment number of 1 at the specified AQL. 2.6.3 Sampling plan with a larger AQL adjacent to the qualified judgment number of 1 for a given batch and inspection level. 2.6.4 Sampling plan with a qualified judgment number of zero. However, if one nonconforming product is present, one of the following procedures shall be used: a. Draw the sum of the first and second sample numbers given in 2.6.2 (i.e., the same AQL, the acceptance number is 1). The second sample shall be inspected. If no nonconforming products are present in the second sample, the lot may be accepted: b. Under the original inspection conditions, if the previous four consecutive batches have been accepted, this batch must be kept until the inspection of the next batch is completed. If the inspection of the next batch of samples is acceptable, both batches shall be accepted. If the inspection of the next batch of samples is unacceptable, both batches shall be rejected.
In case "b", if both batches are accepted and a nonconforming product is present in a batch before all four subsequent batches are accepted successfully (when accepted with zero nonconforming products), then this batch shall be rejected immediately (without waiting for the inspection results of the next batch). Example:
Use an example to illustrate the solution of 2.6.4.
A batch of 400 electron tubes is sampled and inspected at ΛQL of 1.0 and inspection level S-4. Looking at the sampling table, for a batch of 10 and inspection level S-4, the row 281~500 is used, and the sample number 13 is given. This sample number 13 and AQL of 1.0 indicate that GB 11478-89
has an acceptance criterion of zero defective products. Therefore, if there are no defective products, all 400 tubes are accepted. If one defective product appears, go down the column of AQL of 1.0 and find the qualified judgment number of 1, and the corresponding sample number is 50. Therefore, check the additional 37 samples (50 minus 13). If there are no defective products, all 400 tubes are accepted. Although the first failure was only tested 50 samples from the batch of 400. 2.7 Resubmission of unqualified batches
When the sample cannot meet the requirements of batch inspection, it should be handled in accordance with Article 12.4 of QC001002. 2.8 Release batch certification
In the relevant blank detailed specifications, the release batch certification record is given, and when the ordering party also requires it, the following information should be given at least:
The characteristic information (pass or fail) contained in each group of periodic inspection, excluding the parameters that have caused rejection; a.
b. Variable information,
The content of the release batch certification record should comply with the requirements of Chapter 14 of QC001002. 2.9 Delayed delivery
When the tubes have passed the inspection and have been stored in the manufacturer for more than 12 months, they shall be resubmitted to the Group A inspection or other inspections specified in the detailed specification.
2.10 Non-inspection parameters
Performance under working conditions not specified in the detailed specification cannot be guaranteed and shall not be used as inspection items. If operation under such conditions is required, a separate detailed specification must be prepared. Any supplementary test methods used shall be fully described and the corresponding limit values, AQL and inspection level shall be specified. 2.11 Run-in inspection
When the samples cannot meet the requirements of the periodic inspection, they shall be handled in accordance with 12.6 of QC001002. 2.12 Shipment before the completion of Group B inspection
When all Group 1 inspections have met the conditions for relaxed inspections in IEC410, the manufacturer is allowed to release continuous batches of tubes before completing these tests.
3 Test and test methods
3.1 Substitution methods
The tests and test items listed in this specification shall adopt the methods specified in the corresponding national standards or international standards, but the detailed specifications are also allowed to give substitution methods equivalent to the specified methods. Where the specified methods are specified and cited in the detailed specifications, the substitution methods cannot be used. 3.2 Standard test conditions
Unless otherwise specified, all tests shall be carried out under normal test atmospheric conditions specified in GB 2421 (temperature 15~～35℃, relative humidity 45%～75% and air pressure 86~～106kPa). Each test shall be carried out according to the specified procedures. 3.3 Visual inspection
Electronic tubes shall be inspected under normal lighting conditions of the factory, and no special observation tool is required. The inspection items include: a. Active debris; panel quality, tube shell cracks; alignment of tube shell and tube base; flatness of tube pins; position, correctness and clarity of markings. 3.4 Dimensions The detailed specification shall give a dimensioned outline drawing. The tube dimensions shall comply with the provisions of IEC 67 or the provisions of the detailed specification. 3.5 Photoelectric permeability test and test method GB 11478-89 When the detailed specification specifies the inspection of the following relevant photoelectric parameters, the test shall be carried out according to the corresponding method given in GB11480 (see also 3.1 (content of the article)
Hot wire current
Leakage current between hot wire and cathode
Electrode leakage current
Dark current
Light sensitivity
Signal current (or sensitivity)
Image defect
Electrode cut-off voltage
Full resolution
Signal current uniformity
-Dark current uniformity
Alignment coil current (or magnetic field)
Microphonic effect
Spectral sensitivity
Geometric nonlinearity
Output capacitance
Gas inclusion coefficient
Grid pattern
Maximum beam current
Signal conversion characteristics
Photocathode integrated sensitivity
3.6 Mechanical tests and test methods
3.6.1 Bonding strength of tube base and lead cap
3.6.1.1 Determine the bonding quality of the tube base and lead cap bonded to the tube frame. Design: This test is not applicable to the sealing test of glass to metal or porcelain to metal. 3.6.1.2 Procedure
Immerse the electron tube in water at 50-55℃ for at least 18h. After immersion, cool the tube at room temperature for no more than 1h. Then, when the torque specified in Table 2 is gradually applied, the bonding should not loosen. Table 2
Diameter of pipe base or lead cap, mm
Pipe base less than 16.5
Pipe base 16.5~10
Pipe base larger than 10
Medium, small or micro lead caps
12 and lead caps larger than 12
Torque, N·m
3.7 Environmental tests and test methods
CB11478-89
Unless otherwise specified, the following environmental tests shall be consistent with the methods specified in GB 2423. The environmental test items required for a specific type of electrical pipe shall be determined by its detailed specifications. After the environmental test, the following relevant parameters shall be inspected in accordance with the provisions of the detailed specifications: alignment coil current (or magnetic field),
electrode leakage current;
signal current:
modulation electrode cut-off voltage;
gas content coefficient:
image defect:
output capacitance.
Low temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2123.1 test Aa. 3.7.2 High temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2423.2 test Ba. The specified temperature shall not exceed 55±2℃. 3.7.3 Steady damp heat (non-destructive)
electrode tubes shall be subjected to the test of GB2423.3 test Ca. The recommended test duration is 4d. After the test, the marking of the electron tube shall remain clear.
7.4 Impact (non-destructive)
The pipe should also be subjected to the test with the waveform and the combination of acceleration and duration selected from GB2423.5 Test Ea. 3.7.5 Impact (non-destructive)
The tube shall be subjected to the test of GR2423.6 Test Eb. The recommended number of impacts at the specified speed is 1 000 ± 10. 3.7.6 Vibration
The tube shall be subjected to the test of GB2423.10 Test Fc. The frequency range, such as speed or amplitude and duration shall be selected from the values listed therein.
3.7.7 Temperature change (non-destructive)
The tube shall be subjected to the test of GB 2423. 22 Test Na (two-phase method). The low temperature shall be selected from the values recommended in the low temperature test Aa: the high temperature shall be 55 ± 2°C, and the cumulative dew duration at each temperature shall be 30 minutes. 3.7.8 Constant acceleration
The tube shall be subjected to GB 2423. 16 Test Ga The severity of each axis should be specified. 3.7.9 Increased pressure test
The tube should be able to withstand the increased pressure test. The severity should be specified in the detailed specification. 3.7.10 Low pressure
The tube should withstand the test of GB2423.21 test M. The pressure and duration should be selected from the values listed there. 3.7.11
Electronic tubes shall be subjected to the test of GB2423.16 test J. After exposure for 28 days, the electronic tubes shall be visually inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.12 Salt spray
Electronic tubes shall be subjected to the test of GB2423.17 test Ka. At the end of exposure, the electronic tubes shall be inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.13 Sealing of tubes and accessories
The tubes shall be subjected to the test of GB2423.22 test Nb. The high temperature shall be 55 ±2C, some unqualified tubes can be used, but these properties must not be evaluated in the sealing test. ..com3.7.14 Solderability
GB11478-89
Electronic tubes should be subjected to the test of GB2423.28 test T, using a soldering iron or soldering bath method. 3.7.15 Terminal strength
Electronic tubes should be subjected to one or more methods (Ua, Ub, Uc and Ud) of GB2423.29 test U. 3.8 Durability test and test method
3. B.1 Working durability (storage period) When the storage period is not specified in the detail specification, it is considered unnecessary. When the storage period is specified in the detail specification, this test shall be started after the completion of the cathode activation and process control inspection. During the storage period, the electron tube shall be in operation. 3.8.2 Working durability
The working durability test of the electron tube shall be carried out for 1 000 h as specified in the detail specification, or as otherwise specified. The number of tubes tested for each tube type (note the similarity of structure) shall comply with the provisions of Table 3. Table 3
Estimated annual production
Less than 120
120~130
More than 300
At least 1
At least 2
At least 3
Some electron tubes with unqualified performance may be used, but these performances must not be evaluated in the durability test. Additional Notes:
This standard was drafted by the Electronic Standardization Institute of the Ministry of Machinery and Electronics Industry and the 773 Factory. The main drafters of this standard are Hu Zhenqing, Xu Dazhang and Zhu Shengliang.10 Non-inspection parameters
Performance under operating conditions not specified in the detailed specification cannot be guaranteed and should not be used as an inspection item. If operation under such conditions is required, a separate detailed specification must be prepared. Any supplementary test methods used should be fully described and the corresponding limit values, AQL and inspection levels should be specified. 2.11 Run-in period inspection
When the sample does not meet the requirements of the periodic inspection, it should be handled in accordance with 12.6 of QC001002. 2.12 Shipment before completion of Group B inspection
When all Group 1 inspections have met the conditions for relaxed inspections in IEC410, the manufacturer is allowed to release continuous batches of electron tubes before completing these tests.
3 Test and test methods
3.1 Substitution methods
The tests and test items listed in this specification shall adopt the methods specified in the corresponding national standards or international standards, but the detailed specifications are also allowed to give substitution methods equivalent to the specified methods. Where the specified methods are specified and cited in the detailed specifications, the substitution methods cannot be used. 3.2 Standard test conditions
Unless otherwise specified, all tests shall be carried out under normal test atmospheric conditions specified in GB 2421 (temperature 15~～35℃, relative humidity 45%～75% and air pressure 86~～106kPa). Each test shall be carried out according to the specified procedures. 3.3 Visual inspection
Electronic tubes shall be inspected under normal lighting conditions of the factory, and no special observation tool is required. The inspection items include: a. Active debris; panel quality, tube shell cracks; alignment of tube shell and tube base; flatness of tube pins; position, correctness and clarity of markings. 3.4 Dimensions The detailed specification shall give a dimensioned outline drawing. The tube dimensions shall comply with the provisions of IEC 67 or the provisions of the detailed specification. 3.5 Photoelectric permeability test and test method GB 11478-89 When the detailed specification specifies the inspection of the following relevant photoelectric parameters, the test shall be carried out according to the corresponding method given in GB11480 (see also 3.1 (content of the article)
Hot wire current
Leakage current between hot wire and cathode
Electrode leakage current
Dark current
Light sensitivity
Signal current (or sensitivity)
Image defect
Electrode cut-off voltage
Full resolution
Signal current uniformity
-Dark current uniformity
Alignment coil current (or magnetic field)
Microphonic effect
Spectral sensitivity
Geometric nonlinearity
Output capacitance
Gas inclusion coefficient
Grid pattern
Maximum beam current
Signal conversion characteristics
Photocathode integrated sensitivity
3.6 Mechanical tests and test methods
3.6.1 Bonding strength of tube base and lead cap
3.6.1.1 Determine the bonding quality of the tube base and lead cap bonded to the tube frame. Design: This test is not applicable to the sealing test of glass to metal or porcelain to metal. 3.6.1.2 Procedure
Immerse the electron tube in water at 50-55℃ for at least 18h. After immersion, cool the tube at room temperature for no more than 1h. Then, when the torque specified in Table 2 is gradually applied, the bonding should not loosen. Table 2
Diameter of pipe base or lead cap, mm
Pipe base less than 16.5
Pipe base 16.5~10
Pipe base larger than 10
Medium, small or micro lead caps
12 and lead caps larger than 12
Torque, N·m
3.7 Environmental tests and test methods
CB11478-89
Unless otherwise specified, the following environmental tests shall be consistent with the methods specified in GB 2423. The environmental test items required for a specific type of electrical pipe shall be determined by its detailed specifications. After the environmental test, the following relevant parameters shall be inspected in accordance with the provisions of the detailed specifications: alignment coil current (or magnetic field),
electrode leakage current;
signal current:
modulation electrode cut-off voltage;
gas content coefficient:
image defect:
output capacitance.
Low temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2123.1 test Aa. 3.7.2 High temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2423.2 test Ba. The specified temperature shall not exceed 55±2℃. 3.7.3 Steady damp heat (non-destructive)
electrode tubes shall be subjected to the test of GB2423.3 test Ca. The recommended test duration is 4d. After the test, the marking of the electron tube shall remain clear.
7.4 Impact (non-destructive)
The pipe should also be subjected to the test with the waveform and the combination of acceleration and duration selected from GB2423.5 Test Ea. 3.7.5 Impact (non-destructive)
The tube shall be subjected to the test of GR2423.6 Test Eb. The recommended number of impacts at the specified speed is 1 000 ± 10. 3.7.6 Vibration
The tube shall be subjected to the test of GB2423.10 Test Fc. The frequency range, such as speed or amplitude and duration shall be selected from the values listed therein.
3.7.7 Temperature change (non-destructive)
The tube shall be subjected to the test of GB 2423. 22 Test Na (two-phase method). The low temperature shall be selected from the values recommended in the low temperature test Aa: the high temperature shall be 55 ± 2°C, and the cumulative dew duration at each temperature shall be 30 minutes. 3.7.8 Constant acceleration
The tube shall be subjected to GB 2423. 16 Test Ga The severity of each axis should be specified. 3.7.9 Increased pressure test
The tube should be able to withstand the increased pressure test. The severity should be specified in the detailed specification. 3.7.10 Low pressure
The tube should withstand the test of GB2423.21 test M. The pressure and duration should be selected from the values listed there. 3.7.11
Electronic tubes shall be subjected to the test of GB2423.16 test J. After exposure for 28 days, the electronic tubes shall be visually inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.12 Salt spray
Electronic tubes shall be subjected to the test of GB2423.17 test Ka. At the end of exposure, the electronic tubes shall be inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.13 Sealing of tubes and accessories
The tubes shall be subjected to the test of GB2423.22 test Nb. The high temperature shall be 55 ±2C, some unqualified tubes can be used, but these properties must not be evaluated in the sealing test. ..com3.7.14 Solderability
GB11478-89
Electronic tubes should be subjected to the test of GB2423.28 test T, using a soldering iron or soldering bath method. 3.7.15 Terminal strength
Electronic tubes should be subjected to one or more methods (Ua, Ub, Uc and Ud) of GB2423.29 test U. 3.8 Durability test and test method
3. B.1 Working durability (storage period) When the storage period is not specified in the detail specification, it is considered unnecessary. When the storage period is specified in the detail specification, this test shall be started after the completion of the cathode activation and process control inspection. During the storage period, the electron tube shall be in operation. 3.8.2 Working durability
The working durability test of the electron tube shall be carried out for 1 000 h as specified in the detail specification, or as otherwise specified. The number of tubes tested for each tube type (note the similarity of structure) shall comply with the provisions of Table 3. Table 3
Estimated annual production
Less than 120
120~130
More than 300
At least 1
At least 2
At least 3
Some electron tubes with unqualified performance may be used, but these performances must not be evaluated in the durability test. Additional Notes:
This standard was drafted by the Electronic Standardization Institute of the Ministry of Machinery and Electronics Industry and the 773 Factory. The main drafters of this standard are Hu Zhenqing, Xu Dazhang and Zhu Shengliang.10 Non-inspection parameters
Performance under operating conditions not specified in the detailed specification cannot be guaranteed and should not be used as an inspection item. If operation under such conditions is required, a separate detailed specification must be prepared. Any supplementary test methods used should be fully described and the corresponding limit values, AQL and inspection levels should be specified. 2.11 Run-in period inspection
When the sample does not meet the requirements of the periodic inspection, it should be handled in accordance with 12.6 of QC001002. 2.12 Shipment before completion of Group B inspection
When all Group 1 inspections have met the conditions for relaxed inspections in IEC410, the manufacturer is allowed to release continuous batches of electron tubes before completing these tests.
3 Test and test methods
3.1 Substitution methods
The tests and test items listed in this specification shall adopt the methods specified in the corresponding national standards or international standards, but the detailed specifications are also allowed to give substitution methods equivalent to the specified methods. Where the specified methods are specified and cited in the detailed specifications, the substitution methods cannot be used. 3.2 Standard test conditions
Unless otherwise specified, all tests shall be carried out under normal test atmospheric conditions specified in GB 2421 (temperature 15~～35℃, relative humidity 45%～75% and air pressure 86~～106kPa). Each test shall be carried out according to the specified procedures. 3.3 Visual inspection
Electronic tubes shall be inspected under normal lighting conditions of the factory, and no special observation tool is required. The inspection items include: a. Active debris; panel quality, tube shell cracks; alignment of tube shell and tube base; flatness of tube pins; position, correctness and clarity of markings. 3.4 Dimensions The detailed specification shall give a dimensioned outline drawing. The tube dimensions shall comply with the provisions of IEC 67 or the provisions of the detailed specification. 3.5 Photoelectric permeability test and test method GB 11478-89 When the detailed specification specifies the inspection of the following relevant photoelectric parameters, the test shall be carried out according to the corresponding method given in GB11480 (see also 3.1 (content of the article)
Hot wire current
Leakage current between hot wire and cathode
Electrode leakage current
Dark current
Light sensitivity
Signal current (or sensitivity)
Image defect
Electrode cut-off voltage
Full resolution
Signal current uniformity
-Dark current uniformity
Alignment coil current (or magnetic field)
Microphonic effect
Spectral sensitivity
Geometric nonlinearity
Output capacitance
Gas inclusion coefficient
Grid pattern
Maximum beam current
Signal conversion characteristics
Photocathode integrated sensitivity
3.6 Mechanical tests and test methods
3.6.1 Bonding strength of tube base and lead cap
3.6.1.1 Determine the bonding quality of the tube base and lead cap bonded to the tube frame. Design: This test is not applicable to the sealing test of glass to metal or porcelain to metal. 3.6.1.2 Procedure
Immerse the electron tube in water at 50-55℃ for at least 18h. After immersion, cool the tube at room temperature for no more than 1h. Then, when the torque specified in Table 2 is gradually applied, the bonding should not loosen. Table 2
Diameter of pipe base or lead cap, mm
Pipe base less than 16.5
Pipe base 16.5~10
Pipe base larger than 10
Medium, small or micro lead caps
12 and lead caps larger than 12
Torque, N·m
3.7 Environmental tests and test methods
CB11478-89
Unless otherwise specified, the following environmental tests shall be consistent with the methods specified in GB 2423. The environmental test items required for a specific type of electrical pipe shall be determined by its detailed specifications. After the environmental test, the following relevant parameters shall be inspected in accordance with the provisions of the detailed specifications: alignment coil current (or magnetic field),
electrode leakage current;
signal current:
modulation electrode cut-off voltage;
gas content coefficient:
image defect:
output capacitance.
Low temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2123.1 test Aa. 3.7.2 High temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2423.2 test Ba. The specified temperature shall not exceed 55±2℃. 3.7.3 Steady damp heat (non-destructive)
electrode tubes shall be subjected to the test of GB2423.3 test Ca. The recommended test duration is 4d. After the test, the marking of the electron tube shall remain clear.
7.4 Impact (non-destructive)
The pipe should also be subjected to the test with the waveform and the combination of acceleration and duration selected from GB2423.5 Test Ea. 3.7.5 Impact (non-destructive)
The tube shall be subjected to the test of GR2423.6 Test Eb. The recommended number of impacts at the specified speed is 1 000 ± 10. 3.7.6 Vibration
The tube shall be subjected to the test of GB2423.10 Test Fc. The frequency range, such as speed or amplitude and duration shall be selected from the values listed therein.
3.7.7 Temperature change (non-destructive)
The tube shall be subjected to the test of GB 2423. 22 Test Na (two-phase method). The low temperature shall be selected from the values recommended in the low temperature test Aa: the high temperature shall be 55 ± 2°C, and the cumulative dew duration at each temperature shall be 30 minutes. 3.7.8 Constant acceleration
The tube shall be subjected to GB 2423. 16 Test Ga The severity of each axis should be specified. 3.7.9 Increased pressure test
The tube should be able to withstand the increased pressure test. The severity should be specified in the detailed specification. 3.7.10 Low pressure
The tube should withstand the test of GB2423.21 test M. The pressure and duration should be selected from the values listed there. 3.7.11
Electronic tubes shall be subjected to the test of GB2423.16 test J. After exposure for 28 days, the electronic tubes shall be visually inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.12 Salt spray
Electronic tubes shall be subjected to the test of GB2423.17 test Ka. At the end of exposure, the electronic tubes shall be inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.13 Sealing of tubes and accessories
The tubes shall be subjected to the test of GB2423.22 test Nb. The high temperature shall be 55 ±2C, some unqualified tubes can be used, but these properties must not be evaluated in the sealing test. ..com3.7.14 Solderability
GB11478-89
Electronic tubes should be subjected to the test of GB2423.28 test T, using a soldering iron or soldering bath method. 3.7.15 Terminal strength
Electronic tubes should be subjected to one or more methods (Ua, Ub, Uc and Ud) of GB2423.29 test U. 3.8 Durability test and test method
3. B.1 Working durability (storage period) When the storage period is not specified in the detail specification, it is considered unnecessary. When the storage period is specified in the detail specification, this test shall be started after the completion of the cathode activation and process control inspection. During the storage period, the electron tube shall be in operation. 3.8.2 Working durability
The working durability test of the electron tube shall be carried out for 1 000 h as specified in the detail specification, or as otherwise specified. The number of tubes tested for each tube type (note the similarity of structure) shall comply with the provisions of Table 3. Table 3
Estimated annual production
Less than 120
120~130
More than 300
At least 1
At least 2
At least 3
Some electron tubes with unqualified performance may be used, but these performances must not be evaluated in the durability test. Additional Notes:
This standard was drafted by the Electronic Standardization Institute of the Ministry of Machinery and Electronics Industry and the 773 Factory. The main drafters of this standard are Hu Zhenqing, Xu Dazhang and Zhu Shengliang.6. 2.12 Delivery before the completion of Group B inspection
When all Group 1 inspections have met the conditions for relaxed inspections in IEC410, the manufacturer is allowed to release continuous batches of electron tubes before completing these tests.
3 Test and test methods
3.1 Substitution methods
The tests and test items listed in this specification shall adopt the methods specified in the corresponding national standards or international standards, but the detailed specifications are also allowed to give substitution methods equivalent to the specified methods. Where the detailed specifications have specified the referenced methods, the substitution methods cannot be used. 3.2 Standard test conditions
Unless otherwise specified, all tests shall be carried out under the normal test atmospheric conditions specified in GB 2421 (temperature 15~～35℃, relative humidity 45%～75% and air pressure 86~～106kPa). Each test shall be carried out according to the specified procedures. 3.3 Visual inspection
Electronic tubes shall be inspected in the working environment! The inspection is carried out under normal lighting conditions, and no special observation tool is required. The inspection items include: a. Active debris; panel quality, tube shell cracks; alignment of tube shell and tube base; flatness of tube pins; position, correctness and clarity of markings. 3.4 Dimensions The detailed specification shall give an outline drawing with marked dimensions. The tube dimensions shall comply with the provisions of IEC 67 or the provisions of the detailed specification. 3.5 Photoelectric permeability test and test method GB 11478-89 When the detailed specification stipulates the inspection of the following relevant photoelectric parameters, the test shall be carried out according to the corresponding method given in GB11480 (see also 3.1 (content of the article)
Hot wire current
Leakage current between hot wire and cathode
Electrode leakage current
Dark current
Light sensitivity
Signal current (or sensitivity)
Image defect
Electrode cut-off voltage
Full resolution
Signal current uniformity
-Dark current uniformity
Alignment coil current (or magnetic field)
Microphonic effect
Spectral sensitivity
Geometric nonlinearity
Output capacitance
Gas inclusion coefficient
Grid pattern
Maximum beam current
Signal conversion characteristics
Photocathode integrated sensitivity
3.6 Mechanical tests and test methods
3.6.1 Bonding strength of tube base and lead cap
3.6.1.1 Determine the bonding quality of the tube base and lead cap bonded to the tube frame. Design: This test is not applicable to the sealing test of glass to metal or porcelain to metal. 3.6.1.2 Procedure
Immerse the electron tube in water at 50-55℃ for at least 18h. After immersion, cool the tube at room temperature for no more than 1h. Then, when the torque specified in Table 2 is gradually applied, the bonding should not loosen. Table 2
Diameter of pipe base or lead cap, mm
Pipe base less than 16.5
Pipe base 16.5~10
Pipe base larger than 10
Medium, small or micro lead caps
12 and lead caps larger than 12
Torque, N·m
3.7 Environmental tests and test methods
CB11478-89
Unless otherwise specified, the following environmental tests shall be consistent with the methods specified in GB 2423. The environmental test items required for a specific type of electrical pipe shall be determined by its detailed specifications. After the environmental test, the following relevant parameters shall be inspected in accordance with the provisions of the detailed specifications: alignment coil current (or magnetic field),
electrode leakage current;
signal current:
modulation electrode cut-off voltage;
gas content coefficient:
image defect:
output capacitance.
Low temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2123.1 test Aa. 3.7.2 High temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2423.2 test Ba. The specified temperature shall not exceed 55±2℃. 3.7.3 Steady damp heat (non-destructive)
electrode tubes shall be subjected to the test of GB2423.3 test Ca. The recommended test duration is 4d. After the test, the marking of the electron tube shall remain clear.
7.4 Impact (non-destructive)
The pipe should also be subjected to the test with the waveform and the combination of acceleration and duration selected from GB2423.5 Test Ea. 3.7.5 Impact (non-destructive)
The tube shall be subjected to the test of GR2423.6 Test Eb. The recommended number of impacts at the specified speed is 1 000 ± 10. 3.7.6 Vibration
The tube shall be subjected to the test of GB2423.10 Test Fc. The frequency range, such as speed or amplitude and duration shall be selected from the values listed therein.
3.7.7 Temperature change (non-destructive)
The tube shall be subjected to the test of GB 2423. 22 Test Na (two-phase method). The low temperature shall be selected from the values recommended in the low temperature test Aa: the high temperature shall be 55 ± 2°C, and the cumulative dew duration at each temperature shall be 30 minutes. 3.7.8 Constant acceleration
The tube shall be subjected to GB 2423. 16 Test Ga The severity of each axis should be specified. 3.7.9 Increased pressure test
The tube should be able to withstand the increased pressure test. The severity should be specified in the detailed specification. 3.7.10 Low pressure
The tube should withstand the test of GB2423.21 test M. The pressure and duration should be selected from the values listed there. 3.7.11
Electronic tubes shall be subjected to the test of GB2423.16 test J. After exposure for 28 days, the electronic tubes shall be visually inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.12 Salt spray
Electronic tubes shall be subjected to the test of GB2423.17 test Ka. At the end of exposure, the electronic tubes shall be inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.13 Sealing of tubes and accessories
The tubes shall be subjected to the test of GB2423.22 test Nb. The high temperature shall be 55 ±2C, some unqualified tubes can be used, but these properties must not be evaluated in the sealing test. ..com3.7.14 Solderability
GB11478-89
Electronic tubes should be subjected to the test of GB2423.28 test T, using a soldering iron or soldering bath method. 3.7.15 Terminal strength
Electronic tubes should be subjected to one or more methods (Ua, Ub, Uc and Ud) of GB2423.29 test U. 3.8 Durability test and test method
3. B.1 Working durability (storage period) When the storage period is not specified in the detail specification, it is considered unnecessary. When the storage period is specified in the detail specification, this test shall be started after the completion of the cathode activation and process control inspection. During the storage period, the electron tube shall be in operation. 3.8.2 Working durability
The working durability test of the electron tube shall be carried out for 1 000 h as specified in the detail specification, or as otherwise specified. The number of tubes tested for each tube type (note the similarity of structure) shall comply with the provisions of Table 3. Table 3
Estimated annual production
Less than 120
120~130
More than 300
At least 1
At least 2
At least 3
Some electron tubes with unqualified performance may be used, but these performances must not be evaluated in the durability test. Additional Notes:
This standard was drafted by the Electronic Standardization Institute of the Ministry of Machinery and Electronics Industry and the 773 Factory. The main drafters of this standard are Hu Zhenqing, Xu Dazhang and Zhu Shengliang.6. 2.12 Delivery before the completion of Group B inspection
When all Group 1 inspections have met the conditions for relaxed inspections in IEC410, the manufacturer is allowed to release continuous batches of electron tubes before completing these tests.
3 Test and test methods
3.1 Substitution methods
The tests and test items listed in this specification shall adopt the methods specified in the corresponding national standards or international standards, but the detailed specifications are also allowed to give substitution methods equivalent to the specified methods. Where the detailed specifications have specified the referenced methods, the substitution methods cannot be used. 3.2 Standard test conditions
Unless otherwise specified, all tests shall be carried out under the normal test atmospheric conditions specified in GB 2421 (temperature 15~～35℃, relative humidity 45%～75% and air pressure 86~～106kPa). Each test shall be carried out according to the specified procedures. 3.3 Visual inspection
Electronic tubes shall be inspected in the working environment! The inspection is carried out under normal lighting conditions, and no special observation tool is required. The inspection items include: a. Active debris; panel quality, tube shell cracks; alignment of tube shell and tube base; flatness of tube pins; position, correctness and clarity of markings. 3.4 Dimensions The detailed specification shall give an outline drawing with marked dimensions. The tube dimensions shall comply with the provisions of IEC 67 or the provisions of the detailed specification. 3.5 Photoelectric permeability test and test method GB 11478-89 When the detailed specification stipulates the inspection of the following relevant photoelectric parameters, the test shall be carried out according to the corresponding method given in GB11480 (see also 3.1 (content of the article)
Hot wire current
Leakage current between hot wire and cathode
Electrode leakage current
Dark current
Light sensitivity
Signal current (or sensitivity)
Image defect
Electrode cut-off voltage
Full resolution
Signal current uniformity
-Dark current uniformity
Alignment coil current (or magnetic field)
Microphonic effect
Spectral sensitivity
Geometric nonlinearity
Output capacitance
Gas inclusion coefficient
Grid pattern
Maximum beam current
Signal conversion characteristics
Photocathode integrated sensitivity
3.6 Mechanical tests and test methods
3.6.1 Bonding strength of tube base and lead cap
3.6.1.1 Determine the bonding quality of the tube base and lead cap bonded to the tube frame. Design: This test is not applicable to the sealing test of glass to metal or porcelain to metal. 3.6.1.2 Procedure
Immerse the electron tube in water at 50-55℃ for at least 18h. After immersion, cool the tube at room temperature for no more than 1h. Then, when the torque specified in Table 2 is gradually applied, the bonding should not loosen. Table 2
Diameter of pipe base or lead cap, mm
Pipe base less than 16.5
Pipe base 16.5~10
Pipe base larger than 10
Medium, small or micro lead caps
12 and lead caps larger than 12
Torque, N·m
3.7 Environmental tests and test methods
CB11478-89
Unless otherwise specified, the following environmental tests shall be consistent with the methods specified in GB 2423. The environmental test items required for a specific type of electrical pipe shall be determined by its detailed specifications. After the environmental test, the following relevant parameters shall be inspected in accordance with the provisions of the detailed specifications: alignment coil current (or magnetic field),
electrode leakage current;
signal current:
modulation electrode cut-off voltage;
gas content coefficient:
image defect:
output capacitance.
Low temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2123.1 test Aa. 3.7.2 High temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2423.2 test Ba. The specified temperature shall not exceed 55±2℃. 3.7.3 Steady damp heat (non-destructive)
electrode tubes shall be subjected to the test of GB2423.3 test Ca. The recommended test duration is 4d. After the test, the marking of the electron tube shall remain clear.
7.4 Impact (non-destructive)
The pipe should also be subjected to the test with the waveform and the combination of acceleration and duration selected from GB2423.5 Test Ea. 3.7.5 Impact (non-destructive)
The tube shall be subjected to the test of GR2423.6 Test Eb. The recommended number of impacts at the specified speed is 1 000 ± 10. 3.7.6 Vibration
The tube shall be subjected to the test of GB2423.10 Test Fc. The frequency range, such as speed or amplitude and duration shall be selected from the values listed therein.
3.7.7 Temperature change (non-destructive)
The tube shall be subjected to the test of GB 2423. 22 Test Na (two-phase method). The low temperature shall be selected from the values recommended in the low temperature test Aa: the high temperature shall be 55 ± 2°C, and the cumulative dew duration at each temperature shall be 30 minutes. 3.7.8 Constant acceleration
The tube shall be subjected to GB 2423. 16 Test Ga The severity of each axis should be specified. 3.7.9 Increased pressure test
The tube should be able to withstand the increased pressure test. The severity should be specified in the detailed specification. 3.7.10 Low pressure
The tube should withstand the test of GB2423.21 test M. The pressure and duration should be selected from the values listed there. 3.7.11
Electronic tubes shall be subjected to the test of GB2423.16 test J. After exposure for 28 days, the electronic tubes shall be visually inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.12 Salt spray
Electronic tubes shall be subjected to the test of GB2423.17 test Ka. At the end of exposure, the electronic tubes shall be inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.13 Sealing of tubes and accessories
The tubes shall be subjected to the test of GB2423.22 test Nb. The high temperature shall be 55 ±2C, some unqualified tubes can be used, but these properties must not be evaluated in the sealing test. ..com3.7.14 Solderability
GB11478-89
Electronic tubes should be subjected to the test of GB2423.28 test T, using a soldering iron or soldering bath method. 3.7.15 Terminal strength
Electronic tubes should be subjected to one or more methods (Ua, Ub, Uc and Ud) of GB2423.29 test U. 3.8 Durability test and test method
3. B.1 Working durability (storage period) When the storage period is not specified in the detail specification, it is considered unnecessary. When the storage period is specified in the detail specification, this test shall be started after the completion of the cathode activation and process control inspection. During the storage period, the electron tube shall be in operation. 3.8.2 Working durability
The working durability test of the electron tube shall be carried out for 1 000 h as specified in the detail specification, or as otherwise specified. The number of tubes tested for each tube type (note the similarity of structure) shall comply with the provisions of Table 3. Table 3
Estimated annual production
Less than 120
120~130
More than 300
At least 1
At least 2
At least 3
Some electron tubes with unqualified performance may be used, but these performances must not be evaluated in the durability test. Additional Notes:
This standard was drafted by the Electronic Standardization Institute of the Ministry of Machinery and Electronics Industry and the 773 Factory. The main drafters of this standard are Hu Zhenqing, Xu Dazhang and Zhu Shengliang.Relative humidity 45% ~ 75% and air pressure 86 ~ ~ 106kPa). Each test shall be carried out according to the specified procedures. 3.3 Visual inspection
Electronic tubes shall be inspected under normal lighting conditions of the factory! No special observation tool is required. The inspection items include: a.
Active debris;
Panel quality,
Tube shell cracks;
Alignment of tube shell and tube base;
Flatness of tube pins;
Location, correctness and clarity of
Marking. 3.4 Dimensions
Detailed specifications shall give outline drawings with marked dimensions. The tube dimensions shall comply with the provisions of IEC 67 or the provisions of detailed specifications. 3.5 Photoelectric permeability test and test method
GB 11478-89
When the following relevant photoelectric parameters are tested as specified in the detailed specifications, the test shall be carried out in accordance with the corresponding methods given in GB11480 (see also the contents of 3.1)
Hot wire current
Leakage current between hot wire and cathode
Electrode leakage current
Dark current
Light sensitivity
Signal current (or sensitivity)
Image defect
Electrode cut-off voltage
Full resolution
Signal current uniformity
Dark current uniformity
Alignment coil current (or magnetic field)
Microphonic effect
Spectral sensitivity
Geometric nonlinearity
Output capacitance
Gas inclusion coefficient
Grid pattern
Maximum beam current
Signal conversion characteristics
Photocathode integrated sensitivity
3.6 Mechanical tests and test methods
3.6.1 Bonding strength of tube base and lead cap
3.6.1.1 Determine the bonding quality of the tube base and lead cap bonded to the tube frame. Design: This test is not applicable to the sealing test of glass to metal or porcelain to metal. 3.6.1.2 Procedure
Immerse the electron tube in water at 50-55℃ for at least 18h. After immersion, cool the tube at room temperature for no more than 1h. Then, when the torque specified in Table 2 is gradually applied, the bonding should not loosen. Table 2
Diameter of pipe base or lead cap, mm
Pipe base less than 16.5
Pipe base 16.5~10
Pipe base larger than 10
Medium, small or micro lead caps
12 and lead caps larger than 12
Torque, N·m
3.7 Environmental tests and test methods
CB11478-89
Unless otherwise specified, the following environmental tests shall be consistent with the methods specified in GB 2423. The environmental test items required for a specific type of electrical pipe shall be determined by its detailed specifications. After the environmental test, the following relevant parameters shall be inspected in accordance with the provisions of the detailed specifications: alignment coil current (or magnetic field),
electrode leakage current;
signal current:
modulation electrode cut-off voltage;
gas content coefficient:
image defect:
output capacitance.
Low temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2123.1 test Aa. 3.7.2 High temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2423.2 test Ba. The specified temperature shall not exceed 55±2℃. 3.7.3 Steady damp heat (non-destructive)
electrode tubes shall be subjected to the test of GB2423.3 test Ca. The recommended test duration is 4d. After the test, the marking of the electron tube shall remain clear.
7.4 Impact (non-destructive)
The pipe should also be subjected to the test with the waveform and the combination of acceleration and duration selected from GB2423.5 Test Ea. 3.7.5 Impact (non-destructive)
The tube shall be subjected to the test of GR2423.6 Test Eb. The recommended number of impacts at the specified speed is 1 000 ± 10. 3.7.6 Vibration
The tube shall be subjected to the test of GB2423.10 Test Fc. The frequency range, such as speed or amplitude and duration shall be selected from the values listed therein.
3.7.7 Temperature change (non-destructive)
The tube shall be subjected to the test of GB 2423. 22 Test Na (two-phase method). The low temperature shall be selected from the values recommended in the low temperature test Aa: the high temperature shall be 55 ± 2°C, and the cumulative dew duration at each temperature shall be 30 minutes. 3.7.8 Constant acceleration
The tube shall be subjected to GB 2423. 16 Test Ga The severity of each axis should be specified. 3.7.9 Increased pressure test
The tube should be able to withstand the increased pressure test. The severity should be specified in the detailed specification. 3.7.10 Low pressure
The tube should withstand the test of GB2423.21 test M. The pressure and duration should be selected from the values listed there. 3.7.11
Electronic tubes shall be subjected to the test of GB2423.16 test J. After exposure for 28 days, the electronic tubes shall be visually inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.12 Salt spray
Electronic tubes shall be subjected to the test of GB2423.17 test Ka. At the end of exposure, the electronic tubes shall be inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.13 Sealing of tubes and accessories
The tubes shall be subjected to the test of GB2423.22 test Nb. The high temperature shall be 55 ±2C, some unqualified tubes can be used, but these properties must not be evaluated in the sealing test. ..com3.7.14 Solderability
GB11478-89
Electronic tubes should be subjected to the test of GB2423.28 test T, using a soldering iron or soldering bath method. 3.7.15 Terminal strength
Electronic tubes should be subjected to one or more methods (Ua, Ub, Uc and Ud) of GB2423.29 test U. 3.8 Durability test and test method
3. B.1 Working durability (storage period) When the storage period is not specified in the detail specification, it is considered unnecessary. When the storage period is specified in the detail specification, this test shall be started after the completion of the cathode activation and process control inspection. During the storage period, the electron tube shall be in operation. 3.8.2 Working durability
The working durability test of the electron tube shall be carried out for 1 000 h as specified in the detail specification, or as otherwise specified. The number of tubes tested for each tube type (note the similarity of structure) shall comply with the provisions of Table 3. Table 3
Estimated annual production
Less than 120
120~130
More than 300
At least 1
At least 2
At least 3
Some electron tubes with unqualified performance may be used, but these performances must not be evaluated in the durability test. Additional Notes:
This standard was drafted by the Electronic Standardization Institute of the Ministry of Machinery and Electronics Industry and the 773 Factory. The main drafters of this standard are Hu Zhenqing, Xu Dazhang and Zhu Shengliang.Relative humidity 45% ~ 75% and air pressure 86 ~ ~ 106kPa). Each test shall be carried out according to the specified procedures. 3.3 Visual inspection
Electronic tubes shall be inspected under normal lighting conditions of the factory! No special observation tool is required. The inspection items include: a.
Active debris;
Panel quality,
Tube shell cracks;
Alignment of tube shell and tube base;
Flatness of tube pins;
Location, correctness and clarity of
Marking. 3.4 Dimensions
Detailed specifications shall give outline drawings with marked dimensions. The tube dimensions shall comply with the provisions of IEC 67 or the provisions of detailed specifications. 3.5 Photoelectric permeability test and test method
GB 11478-89
When the following relevant photoelectric parameters are tested as specified in the detailed specifications, the test shall be carried out in accordance with the corresponding methods given in GB11480 (see also the contents of 3.1)
Hot wire current
Leakage current between hot wire and cathode
Electrode leakage current
Dark current
Light sensitivity
Signal current (or sensitivity)
Image defect
Electrode cut-off voltage
Full resolution
Signal current uniformity
Dark current uniformity
Alignment coil current (or magnetic field)
Microphonic effect
Spectral sensitivity
Geometric nonlinearity
Output capacitance
Gas inclusion coefficient
Grid pattern
Maximum beam current
Signal conversion characteristics
Photocathode integrated sensitivity
3.6 Mechanical tests and test methods
3.6.1 Bonding strength of tube base and lead cap
3.6.1.1 Determine the bonding quality of the tube base and lead cap bonded to the tube frame. Design: This test is not applicable to the sealing test of glass to metal or porcelain to metal. 3.6.1.2 Procedure
Immerse the electron tube in water at 50-55℃ for at least 18h. After immersion, cool the tube at room temperature for no more than 1h. Then, when the torque specified in Table 2 is gradually applied, the bonding should not loosen. Table 2
Diameter of pipe base or lead cap, mm
Pipe base less than 16.5
Pipe base 16.5~10
Pipe base larger than 10
Medium, small or micro lead caps
12 and lead caps larger than 12
Torque, N·m
3.7 Environmental tests and test methods
CB11478-89
Unless otherwise specified, the following environmental tests shall be consistent with the methods specified in GB 2423. The environmental test items required for a specific type of electrical pipe shall be determined by its detailed specifications. After the environmental test, the following relevant parameters shall be inspected in accordance with the provisions of the detailed specifications: alignment coil current (or magnetic field),
electrode leakage current;
signal current:
modulation electrode cut-off voltage;
gas content coefficient:
image defect:
output capacitance.
Low temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2123.1 test Aa. 3.7.2 High temperature (non-destructive)
electrode tubes shall be subjected to a test at a temperature listed in GB 2423.2 test Ba. The specified temperature shall not exceed 55±2℃. 3.7.3 Steady damp heat (non-destructive)
electrode tubes shall be subjected to the test of GB2423.3 test Ca. The recommended test duration is 4d. After the test, the marking of the electron tube shall remain clear.
7.4 Impact (non-destructive)
The pipe should also be subjected to the test with the waveform and the combination of acceleration and duration selected from GB2423.5 Test Ea. 3.7.5 Impact (non-destructive)
The tube shall be subjected to the test of GR2423.6 Test Eb. The recommended number of impacts at the specified speed is 1 000 ± 10. 3.7.6 Vibration
The tube shall be subjected to the test of GB2423.10 Test Fc. The frequency range, such as speed or amplitude and duration shall be selected from the values listed therein.
3.7.7 Temperature change (non-destructive)
The tube shall be subjected to the test of GB 2423. 22 Test Na (two-phase method). The low temperature shall be selected from the values recommended in the low temperature test Aa: the high temperature shall be 55 ± 2°C, and the cumulative dew duration at each temperature shall be 30 minutes. 3.7.8 Constant acceleration
The tube shall be subjected to GB 2423. 16 Test Ga The severity of each axis should be specified. 3.7.9 Increased pressure test
The tube should be able to withstand the increased pressure test. The severity should be specified in the detailed specification. 3.7.10 Low pressure
The tube should withstand the test of GB2423.21 test M. The pressure and duration should be selected from the values listed there. 3.7.11
Electronic tubes shall be subjected to the test of GB2423.16 test J. After exposure for 28 days, the electronic tubes shall be visually inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.12 Salt spray
Electronic tubes shall be subjected to the test of GB2423.17 test Ka. At the end of exposure, the electronic tubes shall be inspected. Electronic tubes with unqualified photoelectric parameters can be used for this test.
3.7.13 Sealing of tubes and accessories
The tubes shall be subjected to the test of GB2423.22 test Nb. The high temperature shall be 55 ±2C, some unqualified tubes can be used, but these properties must not be evaluated in the sealing test. ..com3.7.14 Solderability
GB11478-89
Electronic tubes should be subjected to the test of GB2423.28 test T, using a soldering iron or soldering bath method. 3.7.15 Terminal strength
Electronic tubes should be subjected to one or more methods (Ua, Ub, Uc and Ud) of GB2423.29 test U. 3.8 Durability test and test method
3. B.1 Working durability (storage period) When the storage period is not specified in the detail specification, it is considered u
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