GB/T 15652-1995 General specification for metal oxide semiconductor gas sensors
Some standard content:
National Standard of the People's Republic of China
Generic specification for gas sensors of metal-oxide semiconductor1 Subject content and scope of application
GB/T 15652—1995
This specification specifies the quality assessment procedures, test and measurement methods, general requirements for packaging and storage and transportation of metal oxide semiconductor gas sensors (hereinafter referred to as gas sensors). Specific requirements and characteristics are specified in the corresponding blank detailed specifications and detailed specifications. This specification is applicable to metal hydride flat conductor gas sensors, and other gas sensors can also be used as a reference. 2 General
2.1 Priority
If there is a conflict between the requirements of this specification and the detailed specifications or other relevant documents, the documents should be used in the following priority order: 1. Detailed specification;
b. Blank detailed specification:
General specification;
d. China Electronic Components Quality Certification Regulations; e: IECQQC0010021EC Electronic Components Quality Assessment System Procedure Rules; f. Other referenced documents (such as IEC documents). 2.2 Related documents
Packaging, storage and transportation pictorial marking
GB2421
General provisions for basic environmental testing procedures for electric and electronic products Basic environmental testing procedures for electric and electronic products Test A: Low overflow test method GB 2423.1
Basic environmental testing procedures for electric and electronic products Test B: High temperature test method
GB 2423.4
Basic environmental testing regulations for electric and electronic products Interpretation, Test Db: Alternating damp heat test method Basic environmental testing procedures for electric and electronic products Test Eal shock test method Basic environmental testing procedures for electric and electronic products GB 2423.10
Test Fc: Vibration (sinusoidal) test method Basic environmental testing procedures for electric and electronic products Test Kd: Sulfur dioxide test method for contact points and connectors GB 2423.20
GB2828 Sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches)GB/T4475 Terminology of sensitive components
GB 7408 Week numbering
GB/T15653 Test methods for metal oxide semiconductor* sensitive componentsSJ1155 Model naming method for sensitive componentsSJ/T10554 Text symbols for sensitive components
SJ/T10555
Graphic derivatives for electrical components
IECQQC001002IFC Rules for procedures for quality assessment system for electrical components2.3 Terms, symbols, and codes No.
Approved by the State Administration of Technical Supervision on July 24, 1995 and implemented on April 1, 1996
GB/T156521995
The terms, symbols and substituted sand used in this specification shall be classified according to the provisions of GB/T4475, SJ/T10554 and SJ/T10555 2-4 Classification
Gas-sensitive elements shall be classified according to the following provisions:
sintered type;
b. floating film type;
thick film type!
d. mixed type.
2.5 Marking
2.5.1 Marking on gas-sensing components
Gas-sensing components shall have the following markings:
a. Terminal identification
Terminal identification shall be specified in the detailed specification b. Product model
Each product shall be marked with its model in accordance with SJ1155: manufacturer identification or trademark
Qualified gas-sensing components shall have the manufacturer identification or trademark; Inspection batch identification code
The inspection batch identification code shall comply with the provisions of GB7408 and shall be expressed by adding the last two digits of the year before the week number (for example: 8305 represents the 5th week of 1983). When more than one batch of products are submitted for quality consistency inspection in the same week, the identification code of the above batch shall be followed by a capital letter as the suffix letter to identify the batch. When the marking area does not allow, the detailed specification shall give the minimum requirements in the above priority order. 2.5.2 Special markings
If the manufacturer uses any special markings, they must not interfere with or obscure the markings required in 2.5.1. The product manual should have an explanation of the special markings. 2.5.3 The overall packaging (or packaging box) should have the following markings: All the markings listed in 2.5.1 except the terminal identification mark; a.
Detailed specification number:
Inspection and re-inspection (if re-inspection is performed) Date: Inspector identification code;
e. Others.
3 Quality Assessment Procedures
3.1 Quality Assessment System
As a complete quality assessment system, the procedures of 3.4 and 3.5 should be followed. 3.2 Initial Manufacturing Stage
For this specification, the initial manufacturing stage is the batching process of the coating material on the surface of the container. These processes should be carried out under the supervision of an approved manufacturer, but are not required to be completed at the same location (see 11.1.2 of IECQQC001002). 3.3 Structurally similar components
Structurally similar components should be gas sensors produced on the same production line using essentially the same design, materials, processes and methods. The chief inspector should report the method of implementing the structural similarity program in the manufacturer and determine representative models for each structurally similar group to satisfy the National Clinical Institute (NSI). For daily inspection, marking, size, weldability and terminal strength of gas sensors, only the same housing is required, and electrical non-conforming products can be used. 3.4 Approval Procedure
3.4.1 Approval of this standard
Manufacturer:
GB/T15652-1995
Meet the general requirements of 1FCQ (2C001002) for approval; a.
Meet the requirements of the initial manufacturing stage in Article 3.1 of this specification; h.
Provide the approval test data (see Table 1) according to the method of Article 11.3.1 a of IECQQC001002. c.
The additional tests required for specific applications and the electrical limits after the relevant environmental tests should be specified in the detailed specifications. 3.4. 2 Maintenance of Identification Approval
Maintenance of Identification Approval shall meet the requirements of 11.5 of IECQQ:001002. 3.4.3 Sampling
The identification test sample shall be representative of the range of gas sensors for which identification approval is sought. The sample size and the number of qualified judgments shall be specified in detail in Table 1.
When an additional test group is introduced into the test table, the number of gas sensors required for the "(" group shall also be increased, and the number of increased addresses shall be equal to the number required for the additional test group.
3. 4.4 Tests
For the qualification of the gas sensors covered by each detailed specification, all the tests specified in Table 1 shall be carried out. The group tests shall be carried out in the order given in Table 1.
All samples shall be subjected to group 0 tests and then divided into other groups. Gas sensors that fail the test in group 0 tests shall not be used in other groups. When a gas sensor fails to meet all or part of the tests in a group, it shall be counted as "1 defective product". When the number of defective products does not exceed the specified number of defective products allowed per group (or subgroup) and the total number of defective products allowed, Approval is granted. Table 1 Approved test list
Test items
Visual inspection and dimensional inspection
Estimate resistance in air
Liquid measurement range
Resistance in air
Sensitivity
Sustainable expansion ratio
Response time
Recovery time
Strong welding (suitable state)
Heating power
Short-term load
Lead terminal strength
Method reference
Article 4.4 of this specification
GH/T 156531955
According to the current regulations
GR/T15653-1995
Article 4.6.5 of this specification
GB/T15653-1995
Wood Specifications
4. 2.1
Test strip
Connection provisions
Connection provisions
According to regulations
According to regulations
Sample size
Number of non-conforming products
Total allowable
Number of non-conforming products
Inspection items
Environmental temperature coefficient
Environmental pore coefficient
Temperature shock
Long-term load
Alternating temperature
Explosion-proof (when applicable)
Corrosion resistance (when applicable)
GB/115652—1995
Continued Table 1
Citations
GB/T 15653—1995
This specification 4.6-6 Article
Article 4.7.2 of this specification
Article 4.6.8 of this specification
Article 4.6.7
This specification
Article 4.8.2 of this specification
Article 1-6.10 of this specification
Note: Group 1 products are not subject to Group 0 test. 3.5 Quality conformity test
3.5-1 Production batch
Test conditions
As specified
As specified
As specified
As specified
As specified
As specified
Sample size
Total allowable
Number of nonconforming products
Number of nonconforming products
Two production batches should be composed of gas sensors manufactured on the same production line using the same design, process, materials and equipment. 3.5.2 Construction of inspection batch
An inspection batch can be composed of one production batch, or several production batches of gas sensors with similar structures manufactured under essentially the same conditions (materials, processes, equipment, etc.). In an inspection batch composed of several production batches, the interval between the first and last submitted production batches shall not exceed one month.
3.5.3 Test list
The list of batch and periodic tests for quality consistency inspection shall be given in the blank detail specification associated with the general specification. This list shall also specify the group division, sampling and period of batch and periodic inspection. The inspection level (11.) and acceptable quality level (AQL) shall be selected from GB 2828.
3.5.4 Resubmission of unqualified batches
When the sample fails to meet the requirements of batch inspection, it shall be handled in accordance with 12.4 of IFCQQC001002. 3.5.5 Release batch certification record
When the relevant detailed specification stipulates the release batch certification record and the purchasing bank requires it, at least the following contents shall be given: the group test characteristic parameter data included in the periodic inspection and the number of gas sensors tested and the number of unqualified gas sensors, without involving the characteristic parameters that have been rejected.
The content of the qualified test record shall comply with the requirements of Chapter 14 of IECQQCn01002. 3.5.6 Delayed delivery
Gas sensors that have been stored for more than 12 months after batch release shall be re-tested according to Group A and Group B of the detailed specification before shipment. 3.5.7 Non-test parameters
Performance under working conditions not specified in the detailed specification cannot be guaranteed and should not be used as an inspection item. 3.5.8 Periodic inspection
GB/T15652—1995
When the sample does not meet the requirements of periodic inspection, it shall be handled in accordance with Article 12.6 of IECQQC001002. 3.5.9 Alternative methods
The test and test methods specified in this specification are not necessarily the only methods that must be used. However, the manufacturer shall prove to the national supervision and inspection agency that the alternative test methods it uses can produce results comparable to those when the specified methods are used. In case of dispute, only the methods specified in this specification and related specifications can be used as arbitration and judgment. 4 Test and measurement methods
4.1 Test procedure
The test procedure refers to a set of operating processes included in a test method, usually including the following items: pretreatment;
b. Initial test:
c. Conditioning test;
d. Recovery (if necessary)
e. Final test
During the conditional test, interim tests may be performed as needed. The technical details and requirements of each item in the interim test and test procedure shall be carried out in accordance with the provisions of the detailed specifications.
4.2 Standard atmospheric conditions
4.2.1 Standard atmospheric conditions for tests
Unless otherwise specified, general tests and their recovery shall be conducted under the following standard atmospheric conditions specified in GB 2421: Temperature: 15~35
Relative humidity: 45%~75%;
Air pressure: 86~106 kPa.
4.2.2 Standard atmospheric conditions for arbitration tests
Tests with strict requirements on ambient temperature and humidity shall be conducted under the following arbitration atmospheric conditions: Temperature: 25±1℃
Relative humidity: 48%~52%
Air pressure: 86~106 kPl.
Before conducting electrical measurements, the temperature of the gas element shall be balanced with the ambient temperature of the test panel and meet the general requirements specified in the test method.
4.3 Test sequence
When two (or more) test items are carried out on the same gas sensor, the test sequence shall be carried out in accordance with the sequence of Table 1 or the tables in the detailed specification.
4.4 Visual inspection and dimensional inspection and methods 4.4.1 External daily inspection
The external visual inspection shall include
a. Correctness, consistency and durability of the marking. The marking shall be clear, correct and firm and shall meet the requirements of the detailed specification. b. External packaging quality
The gas sensor shall be processed by a method that ensures quality consistency. The base and mesh cover shall be smooth and crack-free by visual inspection. The explosion-proof metal mesh shall be made of double-layer stainless steel of more than 80 months, and shall be neat, without damage or falling off. The lead wire shall be firm and without looseness. 4.4.2 Internal visual inspection
The internal daily inspection shall be carried out using a magnifying glass in accordance with the requirements of the detailed specification. 4.4.3 Dimension verification
..comCB/T15652-1995
Dimension verification should use a caliper to verify the shape and dimensions of key parts according to the requirements of the detailed specifications. 4.5 Electrical parameter measurement and methods
The electrical parameters listed in Table 1 should be measured in accordance with the methods specified in GB/T15653 or the detailed specifications. 4.6 Environmental test and methods
4.6.1 Vibration (normal)
The vibration test of gas components should be carried out according to the provisions of GB2123.10. 4.6.1.1 Test conditions
Frequency range: 10~500Hz;
Vibration amplitude: 0.35mm(50m/s2);
Crossover frequency: 57.7[1z];
Waveform: Sine wave;
Frequency deviation: ±0.5Hz(10～100Hz); 10.5%(up to 100Hz);
Sweep rate: Octave per minute;
Rate tolerance: ±10%;
Sweep direction: Axial direction of gas sensor base, axis of tube core, perpendicular direction of two axes; Number of sweeps: 10 times in each direction, 30 times in total. 4.6.1.2 Test procedure
a. Neck treatment
The sample shall be operated under standard atmospheric conditions for a period of time before the test, the length of which shall be specified in the detailed specification. b. Initial test
Test the resistance value in the test gas according to the requirements of the detailed specification and conduct monthly inspections as required by Article 1.4.1 of this specification. After the test, the sample shall be placed under standard conditions for 1h
c. Condition test
Fix the sample in a non-working state on the test bench and conduct the test according to the test conditions. During the test, if the detailed specification requires, an intermediate test shall be conducted
d Final test
After the test, test the resistance value in the test gas according to the requirements of the detailed specification and conduct a macro inspection as required by Article 4.4.1 of this specification without recovery.
4.6.1.3 Test equipment
The test equipment shall comply with the relevant provisions of GB 2423.10. 4.6.2 Shock (specified pulse)
The shock test method for gas sensors is carried out in accordance with the provisions of GB2423.5. 4.6.2.1 Test conditions
Peak value velocity: 10u0 m/5
Nominal duration: 6 mb#
Waveform: half sine wave:
Waveform deviation: ±15%
Speed change = 3.75m/*#
Change tolerance: ±10% of the value of the change in the velocity; the measurement of the change in the velocity of the shock pulse is from the ideal pulse before (4 1) to the ideal pulse after (4 1).1 P until; Note: 1) is the duration of the nominal pulse, the impact direction; take the positive and negative directions perpendicular to the axis of the core of the body + GB/T 15652-1995
Impact times: 3 times in each direction, a total of 12 times. 4.6-2.2 Test procedure
: Pre-treatment
According to the provisions of 4.6.1.2 A.
1. Initial test
According to the provisions of 4.6.1.2 b.
c. Condition test
Fasten the non-working specimen on the test bench and test according to the test conditions. d. Final test
According to the provisions of 1.6.1.2d.
4.6.2. 3 Test equipment
The performance of the impact bench and the test system shall comply with the relevant provisions of GB2123.5. 4.6.3 Drop
4. 6. 3. 1 Test conditions
Drop height: 800 mm;
Drop method: free fall;
Number of drops: 3 times.
4.6.3.2 Test procedure
a. Pretreatment
According to the provisions of 4. 6. 1. 2 ±.
b. Initial test
According to the provisions of 4.6.1.2b.
e. Conditional test
Let the non-working specimen fall freely onto the table according to the test conditions. d. Final test
According to the provisions of 4. 6. 1.2 d.
4.6.3.3 Test equipment
The embedded drop table used for the test is a hard miscellaneous wood board with a thickness of 30 mm laid on the cement floor. 4.6.4 Strength of lead-out terminals
4.6.4. 1 Test conditions
Test method: tensile test;
Tensile force: 20N:
Tensile direction: vertically downward along the axis of the base +
Number of tests: 1 time for each pin,
Duration: 10% each time.
4.6.4.2 Test procedure
and. Pre-embedding
Bend the lower end of the base pin into a hook shape to facilitate the application of tension. b. Initial test
According to the provisions of 4.6.1.2b.
Parts test
Fix the non-working specimen on the test frame and conduct the test according to the test conditions. During the test, the test mixture shall be tested for months according to the detailed specifications. d. Final test
According to the provisions of 4.6.1.2 d.
4.6.4.3 Test equipment
GB/T 15652—1995
The test stand should be able to ensure that the specimen is firmly installed and can withstand the applied tensile force. 4.6.5 Soldering
4. 6. 5. 1 Test conditions
a. Solderability test
Test method: solder ball method;
Test temperature: 235±5℃:
Weight of solder ball: 200 mg.
b. Resistance to soldering heat test
Test method: molten iron method;
Test temperature: 350±10℃
Test time: 10±1 8.
4.6.5.2 Test procedure
Initial inspection
According to the provisions of 4. 6. 1. 2 b.
b. Pretreatment
Spread flux on the pins and prepare for the test.
C Condition test
Test under the conditions at a position where the pins are exposed 2mm from the base. During the solderability test, the time required from the pin cutting the solder ball to the contact with the heating head to the solder flowing to the conductor periphery and covering the pins should be calculated. d. Recovery
After the test is completed and the residual flux on the sample is removed, place the sample under standard atmospheric conditions for 1h. e. Final test
After the test is completed and the recovery is completed, test the resistance value in the test gas according to the requirements of the detailed specification and conduct a visual inspection according to the requirements of Article 4.4.1 of this specification. 4.6.5.3 Test equipment
If it is necessary to support the test, use insulation materials, and the test iron should ensure that the test temperature meets the test condition requirements. 4.6-6 Temperature shock
The temperature shock test method of gas-sensitive components shall be carried out in accordance with the provisions of GB2423.5. 4.6.6.1 Test conditions
Test method, two-box method:
Test temperature: -40℃/85℃;
Temperature difference: ±2℃ (at high temperature)
±3 (at low temperature)
Number of cycles: 5 times:
Holding time: 0.5h.
4.6.6.2 Test procedures
a. Pretreatment
According to the provisions of 4.6.1.2a.
b. Initial test
According to the provisions of 4.6.1.2h.
c. Conditional test
GB/T156521995
Test the non-working specimens in the order of low temperature first and then high temperature according to the test conditions. The high and low temperature transition time shall not exceed 3 in.
After the test, the sample should be placed under standard atmospheric conditions for 2 hours. e. Final inspection
According to the provisions of 4.6.5.2 e.
4.6.6.3 Test equipment
The high and low temperature chambers should have sufficient heat capacity to ensure that the working space can reach the specified temperature value within 3 minutes after the sample is placed in the test chamber. Other requirements should comply with the relevant provisions of GB2423.1 and GB2423.2. 4.6.7 Alternating damp heat
The alternating damp heat test method of gas sensors shall be carried out in accordance with the provisions of GB2423.4. 4.6.7.1 Test conditions
Maximum temperature: 40℃;
Temperature tolerance ±2℃,
Test cycle: 2+
Time per cycle: 24 h,
4.6.7.2 Test procedure
a: Treatment
According to the provisions of 4.6.1.2a.
b. Initial test
According to the provisions of 4.6.1.2b
c. Condition test
Put the non-working specimen (with the connection wires connected) into the test chamber at 25±2℃, keep it for 1 hour, then start to heat it to relative humidity ≥95% (temperature unchanged), and then carry out the following cyclic test. Heating: The temperature of the test chamber is raised from 25±2℃ to 40±2℃ within 2.5h, and the relative humidity is kept at 92%~98% during this period. Maintain high temperature and high humidity until the 12th hour and then start cooling. Cooling: The test temperature is reduced from 40±2℃ to 252℃ within 2.5h, and the relative humidity is maintained at 92%~98% during this period. Maintain normal temperature and high humidity until the 24th hour and then start the down-cycle. If the detailed specifications have provisions during the test, intermediate tests should be carried out. d. Recovery
After the test is completed, the sample is treated under standard atmospheric conditions for 2 hours. e. Final test
According to the provisions of 4.6.5.2
4.6-7.3 Test equipment
The performance of the test box shall comply with the relevant provisions in GB2423.4. 4.6.8 Low temperature
The low temperature test method of the gas sensor shall be carried out in accordance with the provisions of Al in GB2423.1. 4.6.8.1 Test conditions
Test method: temperature gradient;
Temperature: a.
—15±3℃
-40±3 (if necessary):
Holding time: 2h.
4.6.8.2 Test procedure
a. Pretreatment
According to the provisions of 4.6.1.2±.
b. Initial test
According to the provisions of 4.6.1.2b
GB/T15652—1995
c. Condition test
Put the working sample into the test chamber with the test room ambient temperature, start the test chamber, and reduce the temperature to the specified low temperature at a rate of 1℃/min. After keeping it for 2 hours, raise it to room temperature at a rate of 1℃/min. During the test, carry out intermediate tests according to the requirements of the detailed specifications. d. Recovery
According to the provisions of 4.6.6.2d.
e. Final test
According to the provisions of 4.6.5.2c.
4.6.8.3 Test equipment
The performance of the test chamber shall comply with the relevant provisions of Ad in GB 2423.1. 4.6.9 High temperature
The high temperature test method of gas sensors shall be carried out according to the provisions of a in GB2423.2. 4.6.9.1 Test conditions
Test method: Temperature gradient:
Temperature: 55+2°C,
Holding time: 2 h,
4-6-9.2 Test procedure
a. Pretreatment
According to 4.6.1.2 ± .
b. Initial test
According to the provisions of 4.6.1.2b.
Condition test
Put the working specimen into the test chamber t with the test air environment temperature, start the test chamber, raise the temperature to the specified high temperature at a rate of 1°C/min, keep it for 2h, and then reduce it to room temperature at a rate of 1°C/min. During the test, carry out intermediate tests according to the requirements of the detailed specifications. d. Recovery
According to the provisions of 4.6.5.2 d.
Final test
According to the provisions of 4.6.5.2 c.
4.6.9.3 Test equipment
The performance of the test chamber shall comply with the provisions of GB2423.2 Ba. 4.6.10 Corrosion resistance
The corrosion resistance test method of gas sensing element shall be carried out in accordance with the provisions of GB2423.20. 4.6.10.1 Test conditions
Test mode: carrier gas operation;
Test gas, sulfuric acid gas;
Gas concentration: 0.4×10-6, 10-6;
Duration: 240h.
4.6.10.2 Test procedures
a Pretreatment
Follow the provisions of 1.6.1.2.
Initial inspection
Follow the provisions of 4.6.1.2 h.
e Test
Perform the test according to the test conditions.
d. Restoration
GB/T15652—1995
After the test is completed, continue to energize for 24h in clean air and standard atmospheric conditions, and then leave it for 2h. e. Final test
According to the provisions of 4.6.5.2e.
4.6.10.3 Test equipment
The power supply for the test shall be able to ensure that its output error is not greater than ±5%. The test box shall comply with the relevant provisions of GB2123.20. 4.7 Electric load test and its method
4.7.1 Short-term load
4.7.1.1 Test conditions
Heating voltage: 125% of the specified positive band value: Power-on time: 96 h.
4.7.1.2 Test procedure
, Pretreatment
According to the provisions of 1.6.1.2a.
b. Initial test
According to the provisions of 4. 6-1.2 b.
, Conditional test
Test according to the conditional requirements. During the test, intermediate tests shall be carried out according to the requirements of the detailed specifications. d. Recovery
According to the provisions of 4.6.6.2 d.
c: Final test
According to the provisions of 4.6.5.2.
4.7.1.3 Test equipment
The power supply used for the test should be able to ensure that its output error is not greater than +5%. 4.7.2 Long-term loadbzxz.net
4.7.2.1 Test strip
Test method: Normal power-on:
Power-on time: 2000h.
4. 7.2.2 Test procedure
A: Pretreatment
According to the provisions of 4.6.1.2a.
b. Initial test
Perform the test in accordance with the provisions of 4.6.1, 2 b
Perform the test in accordance with the test conditions. During the test, the test gas of the specified concentration is passed through the sample every 23 hours (maintained for 1 hour). During the test, an intermediate test is performed in accordance with the requirements of the detailed specifications.
d. Recovery
Perform the provisions of 4.6.6.2d.
e. Final test
Perform the provisions of 4.6.5.2 e.
4.7.2.3 Test power supply
GB/T15652—1995
The power supply used for the test should be able to ensure that its output error is not greater than ±5%. 4.8 Other tests and methods
4.8.1 Aging
4.8.1.1 Aging conditions
Aging method: normal conduction;
Aging time, 240h (or the time specified in the detailed specification). 4.8-1.2 Aging procedure
a. Pretreatment
According to the provisions of 4.6.1.2a.
b. Initial test
According to the provisions of 4.6.1.2b.
c. Conditional aging
Aging with power on according to the test conditions.
d. Recovery
According to the provisions of 4.6.6.2d.
e. Final test
According to the provisions of 4.6.5.2e.
4.8.1.3 Test equipment
The power supply of the aging equipment should be able to ensure that its output error is no more than ±5%. 4.8.2 Explosion-proof
4.8.2.1 Test requirements
The explosion-proof test is a safety test and should be sent to the national designated inspection department for conduction. 4.8. 2. 2 Test items
Structural inspection,
b. Safety spark performance test.
When submitting for inspection, the manufacturer should provide structural data such as surface temperature, insulation dielectric strength, and protection performance. Additional remarks:
This standard was proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard was drafted by the Standardization Institute of the Ministry of Electronics Industry. This standard was drafted by the Standardization Institute of the Ministry of Electronics Industry and Harbin Tongjiang Transistor Factory. The main drafters of this standard are Chen Kan, Baogui, Ma Fuqiu, and Zhang Wei.2 b provisions
Test
Test according to the test conditions. During the test, the test gas of the specified concentration is passed through the sample every 23 hours (maintained for 1 hour). During the test, an interim test is carried out according to the requirements of the detailed specification.
d. Recovery
According to the provisions of 4.6.6.2d.
e. Final test
According to the provisions of 4.6.5.2 e.
4.7.2.3 Test power supply
GB/T15652—1995
The power supply used for the test should be able to ensure that its output error is not greater than ±5%. 4.8 Other tests and methods
4.8.1 Aging
4.8.1.1 Aging conditions
Aging method: normal flow;
Aging time, 240h (or the time specified in the detailed specification). 4.8-1.2 Aging Procedure
a. Pretreatment
According to the provisions of 4.6.1.2a.
b. Initial test
According to the provisions of 4.6.1.2b.
c. Conditional aging
Aging with power on according to the test conditions.
d. Recovery
According to the provisions of 4.6.6.2d.
e. Final test
According to the provisions of 4.6.5.2e.
4.8.1.3 Test Equipment
The power supply of the aging equipment should be able to ensure that its output error is not greater than ±5%. 4.8.2 Explosion-proof
4.8.2.1 Test Requirements
The explosion-proof test is a safety test and should be sent to the national designated inspection department for conduction. 4.8.2.2 Test items
Structural inspection,
b. Safety spark performance test.
When submitting for inspection, the manufacturer shall provide structural data such as surface temperature, dielectric strength of insulation, and protection performance. Additional remarks:
This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is drafted by the Standardization Institute of the Ministry of Electronics Industry. This standard is drafted by the Standardization Institute of the Ministry of Electronics Industry and Harbin Tongjiang Transistor Factory. The main drafters of this standard are Chen Kan, Baogui, Ma Fuqiu, and Zhang Wei.2 b provisions
Test
Test according to the test conditions. During the test, the test gas of the specified concentration is passed through the sample every 23 hours (maintained for 1 hour). During the test, an interim test is carried out according to the requirements of the detailed specification.
d. Recovery
According to the provisions of 4.6.6.2d.
e. Final test
According to the provisions of 4.6.5.2 e.
4.7.2.3 Test power supply
GB/T15652—1995
The power supply used for the test should be able to ensure that its output error is not greater than ±5%. 4.8 Other tests and methods
4.8.1 Aging
4.8.1.1 Aging conditions
Aging method: normal flow;
Aging time, 240h (or the time specified in the detailed specification). 4.8-1.2 Aging Procedure
a. Pretreatment
According to the provisions of 4.6.1.2a.
b. Initial test
According to the provisions of 4.6.1.2b.
c. Conditional aging
Aging with power on according to the test conditions.
d. Recovery
According to the provisions of 4.6.6.2d.
e. Final test
According to the provisions of 4.6.5.2e.
4.8.1.3 Test Equipment
The power supply of the aging equipment should be able to ensure that its output error is not greater than ±5%. 4.8.2 Explosion-proof
4.8.2.1 Test Requirements
The explosion-proof test is a safety test and should be sent to the national designated inspection department for conduction. 4.8.2.2 Test items
Structural inspection,
b. Safety spark performance test.
When submitting for inspection, the manufacturer shall provide structural data such as surface temperature, dielectric strength of insulation, and protection performance. Additional remarks:
This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is drafted by the Standardization Institute of the Ministry of Electronics Industry. This standard is drafted by the Standardization Institute of the Ministry of Electronics Industry and Harbin Tongjiang Transistor Factory. The main drafters of this standard are Chen Kan, Baogui, Ma Fuqiu, and Zhang Wei.
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