Some standard content:
QB/T2269—1996
This standard is not equivalent to the Italian standard IHV-14-C1-707 "IRE oven timer".
This standard is proposed by the Quality Standards Department of China Light Industry General Association. This standard is under the jurisdiction of the National Clock and Watch Standardization Center. The drafting units of this standard are: Hangzhou Timer General Factory, China Light Industry General Association Clock and Watch Research Institute. The main drafters of this standard are: Zhou Dingwei, Wu Linyuan, Lu Lijun, Yang Zhangshun, Yan Yuzhi, Zhao Yanyu. 386
1 Scope
Light Industry Industry Standard of the People's Republic of China
Mechanical timer for electric oven
QB/T 2269-1996
This standard specifies the product classification, naming, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of mechanical timers for electric ovens.
This standard applies to mechanical timers for household electric ovens (hereinafter referred to as "timers") that use springs as power sources, single bell sounds as time period end signals, and have power on and off functions. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2423.3--1993 Basic environmental test procedures for electric and electronic products Test Ca: Steady-state damp heat test method GB/T2828--1987 Count sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches) Count sampling procedures and sampling tables for periodic inspection (applicable to inspection of stability of production process) GB/T 2829-1987
QB/T1538-1992 Provisions for the preparation of product codes for timekeeping instruments Code representation method for tables, clocks and timers 3 Classification and naming
3.1 Classification
According to different structures, it is divided into:
With inherent periodic oscillation system;
Without inherent periodic oscillation system.
3.2 Naming
3.2.1 The representation method of timer model shall be written according to the representation method of timer code in QB/T1538. C
Factory design serial number (expressed in Arabic numerals), characteristics, single sound signal
Timing range, minutes (expressed in Arabic numerals), spring-type electric oven with inherent periodic oscillation system
Example:
Factory design serial number is 1, timing range is 60min, spring-type electric oven with inherent periodic oscillation system, single sound signal, contact, single main control wheel, single pit. The expression method of electric oven timer is: c
3.2.2 The contact rating of the timer is:
China Approved by the General Association of Light Industry on January 27, 1997
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Implementation on September 1, 1997
Rated voltage: ac220V:
Rated frequency: 50Hz;
-Rated current: 6.5A.
4 Technical requirements
4.1 Installation dimensions
QB/T2269—1996
4.1.1 The installation dimensions and working angles of the timer shall comply with the requirements of Figures 1 and 2. 270±5
10°±5°
Stop position
Disconnect position
+24±0. 16
Timer limit weight
270°±5*
QB/T 2269--1996
18±55
Stop position
Disconnect position
$6 +0. 010
4.1.2 If there are special requirements for installation dimensions, they can be agreed upon by both parties. 4.2 Appearance quality
The surface of metal appearance parts is not allowed to have visible rust spots, and the coating is not allowed to have exposed bottom, peeling, and blistering. HiiKAoNiKAca-
Timing limit position
QB/T 2269—1996
The surface of non-metallic appearance parts should be smooth, without cracks, obvious blistering, deformation, and burrs. 4.3 Working reliability
The timer should work reliably, not stop, be able to switch on and off the power normally, and emit a single ring tone at the end of the timing. 4.4 Timing error
When the timer is in the working position and fully wound, the timing errors of the whole process are: the system with inherent period oscillation is the full timing range of ±4%; the system without inherent period oscillation is the full timing range of ±15%. 4.5 Operating torque
The operating torque of the timer should not exceed 0.5N·m. 4.6 Spindle limiter strength
The spindle limiter bears a torque of no more than 0.8N·㎡, and there should be no permanent deformation or damage. 4.7 Contact pressure
Contact pressure should not be less than 0.3N when the contact is closed. 4.8 Contact resistance
Contact resistance should not be greater than 100mN when the contact is closed. 4.9 Contact connection and disconnection capacity
The contact should be able to connect and disconnect the rated load normally after 10 consecutive connections in a load circuit with rated voltage and 1.5 times the rated current.
4.10 Electrical clearance and creepage distance
The electrical clearance and creepage distance between live and dead metal parts should not be less than 3mm. 4.11 Insulation resistance
The insulation resistance between the live parts of the timer and the easily accessible non-live metal parts should not be less than 100MQ. 4.12 Dielectric strength
Between the live parts of the timer and the easily accessible non-live metal parts, there should be no insulation breakdown and flashover when the test voltage of ac1800V (effective value) and frequency of 50Hz lasts for 1 minute. 4.13 Humidity and heat resistance
After the timer is subjected to the humidity and heat test in accordance with GB/T2423.3, it should meet the following requirements. a) The insulation resistance should be not less than 10Mn;
b) When the test voltage of ac1500V (effective value) and frequency of 50Hz lasts for 1 minute, there should be no insulation breakdown and flashover.
4.14 Heat resistance
When the timer is placed in an environment with a temperature of (120±5)℃, the shell should not crack or deform, and the timing error should not be greater than twice the value specified in 4.4.
4.15 Cold resistance
When the timer is placed in an environment with a temperature of (-15±5)℃, the shell should not crack or deform. At room temperature, its timing error should comply with the provisions of 4.4.
4.16 Forced return resistance
When the contacts are subjected to rated load, the timing error of the timer after 5000 forced return operations should not be greater than twice the value specified in 4.4.
4.17 Drop in packaging
When the packaged packaging box containing the timer is freely dropped from a height of 1m onto the cement floor twice, the package should not fall apart. Then open the box to check the timer. It should not be damaged and can still work normally. The timing error should comply with the provisions of 4.4. 390
5 Test method
5.1 Environmental conditions
QB/T2269—1996
Unless otherwise specified, the test shall be conducted indoors at a temperature of (25±10)°C and a relative humidity of no more than 75%. 5.2 Accuracy of test instruments and measuring tools
5.2.1 The accuracy of electrical instruments used for type tests: megohmmeter shall not be less than Class 1.0, and the others shall not be less than Class 0.5. The impedance of the millivoltmeter used to measure the contact resistance of the contact shall not be less than 1k. 5.2.2 The accuracy level of general measuring tools used to measure dimensions shall not be less than Class 2. 5.2.3 The daily error of the timing instrument used to measure the timing error shall not be greater than ±1min/d, and shall have a second scale. 5.2.4 The accuracy of the dynamometer used to measure the contact pressure shall not be less than Class 4, and the measuring range shall be 0~~0.5N. 5.2.5 The error of special measuring tools used to measure electrical clearance and creepage distance should not exceed ±0.02mm. 5.2.6 The relative error of instruments used to measure torque should not exceed 5%. 5.3 Installation dimensions
Use general measuring tools and special measuring tools to check the installation dimensions and working angles of the timer. The results should comply with the provisions of 4.1. 5.4 Appearance quality
Visually inspect the surface quality of the appearance parts with normal vision at a distance of 0.4m under normal natural light indoors. The results should comply with the provisions of 4.2. 5.5 Working reliability
Place the timer on the test bench with the main shaft handle in two positions, vertically upward and horizontally. Test each position once at full range. The results should comply with the provisions of 4.3.
5.6 Timing Error
Install the timer on the test bench in the working position, connect the contacts in series in the circuit of the on-off display, wind it to the timing limit position and let it return naturally (winding time should not exceed 2s), measure twice, and take the arithmetic mean. The result should meet the requirements of 4.4. 5.7 Operating torque
Before the test, pre-rotate the spindle twice to full stroke, then measure the operating torque of the spindle handle in the positive direction from the contact disconnection position, and then measure the operating torque of the spindle handle in the reverse direction from the timing limit position. The result should meet the requirements of 4.5. 5.8 Spindle limiter strength
Fix the timer on the bracket with the spindle handle in the horizontal position, first rotate the spindle handle to any limit position, and then apply a torque of 0.8N·m to the spindle handle. After 15s, perform the above method in the reverse direction. The result should meet the requirements of 4.6. 5.9 Contact pressure
The timer contacts are in the closed state, and the contacts are connected in series in a circuit with an on/off display. Use a dynamometer to measure twice and take the arithmetic mean. The result should meet the requirements of 4.7.
5.10 Contact resistance
When the timer contacts are in the closed state, use a contact resistance tester to measure the contact resistance between the contacts. Measure three times and take the arithmetic mean. The result should comply with the provisions of 4.8.
5.11 Contact connection and disconnection capacity
When the contact is in a load circuit with a rated voltage and a current of 1.5 times the rated value, the circuit is connected and disconnected 10 times at an operating frequency of 2 times per minute. The result should comply with the provisions of 4.9. 5.12 Electrical clearance and creepage distance
When the timer housing is separated from the movement, visually observe and use relevant measuring tools to check the electrical clearance and creepage distance between the live and dead metal parts. The result should comply with the provisions of 4.10. 5.13 Insulation resistance
Use a DC megohmmeter with a voltage level of 500V to measure the resistance with the live part terminal as one pole and the easily accessible non-live metal part as the other pole in the contact closed state. The result should meet the requirements of 4.11. 391
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5.14 Dielectric strength
QB/T2269—1996
Test in the contact closed state, with the live part terminal as one pole and the easily accessible non-live metal part as the other pole. At the beginning of the test, gradually apply the voltage to half of the specified voltage value, and then quickly increase to the test voltage value of 1800V, the current is 10mA, and it lasts for 1min. The result should meet the requirements of 4.12. 5.15 Heat and humidity resistance
The timer is placed in an environment with a temperature of (40±2)℃ and a relative humidity of 90% to 95% for 48 hours. After that, take it out and wipe the surface dry immediately at room temperature. The performance should be completed within 3 minutes. The performance should meet the requirements of 4.13. 5.16 Heat resistance
Put the timer in a high temperature box with a temperature of (120±5)℃ for 1 hour, and measure the time error of the timer in the box. The result should meet the requirements of 4.14.
5.17 Cold resistance
Put the timer in a low temperature box with a temperature of (-15±5)℃ for 4 hours, and then move it to room temperature to recover for no less than 1 hour. Measure its timing error. The result should meet the requirements of 4.15. 5.18 Forced return resistance
Connect the timer to the rated load test circuit. During the test, the timer main shaft handle rotates forward and reverse at an average speed of 3 times per minute, with an angle of not less than 120°. The main shaft handle is operated 5000 times (one forward and reverse rotation counts as one time). The contact should be connected and disconnected once during each operation. After the above test, the result should meet the requirements of 4.16. 5.19 Drop in packaging state
In the finished product warehouse with qualified packaging, take any box, with the bottom edge or side edge parallel to the ground and 1m above the ground, and let it fall freely on the cement floor under the premise that the initial speed of the packaging box is zero. After two drop tests, open the box and check the timer one by one. The results should meet the requirements of 4.17. 6 Inspection rules
6.1 Factory inspection
6.1.1 Factory inspection shall be carried out in accordance with the provisions of GB/T2828. The inspection items, non-conforming categories, sampling plans, inspection levels (IL) and acceptable quality levels (AQL) are shown in Table 1.
Non-conforming categories" No.
Inspection items
Working reliability
Timing error
Installation dimensions
Appearance quality
Operating torque
6.1.2 The composition and batch size of the batch shall be agreed upon by the supplier and the buyer. Corresponding clauses
6.1.3 The inspection strictness shall be in accordance with 4.6 of GB/T2828-1987. AQL
6.1.4 The judgment of qualified and unqualified factory inspection shall be carried out in accordance with 4.11 of GB/T2828-1987. Sampling plan
One-time sampling
6.1.5 The disposal after inspection shall be carried out in accordance with 4.12 of GB/T2828-1987. 6.1.6 In the factory inspection, the two requirements of insulation resistance and dielectric strength are subject to random inspection, with one sampling, and the qualified judgment number is zero. The sample size is agreed upon by the supply and demand parties. The samples for random inspection must all pass the two tests. If one sample fails one test, the factory inspection is judged to be unqualified. The manufacturer is allowed to take measures for the unqualified items, and then conduct random inspections after improvement until they are qualified. 6.2 Type inspection
6.2.1 The cycle of type inspection is generally once a year. Type inspection should also be carried out when one of the following situations occurs. ) Trial type identification of new products or old products transferred to the factory for production; 392
QB/T2269—1996
b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance, c) During normal production, regular or after accumulating a certain amount of output, an inspection should be carried out periodically; d) When the product is resumed after a long period of suspension: e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a type inspection requirement. 6.2.2 Type inspection shall be carried out in accordance with the provisions of GB/T2829. The classification of non-conforming products, inspection items, discrimination level, sampling plan and non-conforming quality level (RQL) are shown in Table 2.
Non-conformity classification number
Inspection items
Working reliability
Timing error
Contact pressure
Contact resistance
Operating torquebzxz.net
Forced return resistance
Contact connection and disconnection capacity
Installation dimensions
Appearance quality
Spindle stopper strength
Applicable terms
【Number of samples
Only one non-conformity is allowed in the inspection of items with a sample number of 3. 2 The packaging state drop test shall be agreed upon by the supply and demand parties. 8
6.2.3 The samples for type inspection shall be randomly selected from a batch or several batches that have passed the factory inspection. R
6.2.4 The judgment of qualified and unqualified in type inspection shall be carried out in accordance with the provisions of 4.11 of GB/T 2829-1987. 6.2.5 The disposal after type inspection shall be carried out in accordance with the provisions of 4.12 of GB/T2829-1987. 6.2.6 The type of sampling plan for type inspection can also be agreed upon by the supply and demand parties. Judgment level
Sampling plan
Single sampling
6.2.7 In type inspection, the four safety requirements of electrical clearance and creepage distance, insulation resistance, dielectric strength, and moisture and heat resistance shall be checked by random inspection method, with single sampling, and the qualified judgment number is zero. The sample size of random inspection shall be agreed upon by the supply and demand parties. All four tests of the sample to be checked must be qualified. If one sample fails one item, the type inspection shall be judged to be unqualified. The manufacturer is allowed to take measures for the unqualified items, and then conduct random inspections after improvement until they are qualified.
7 Marking, packaging, transportation and storage
7.1 Each timer shall be marked in an obvious position. The marking content is as follows: a) manufacturer name and registered trademark;
b) product model;
c) rated voltage and rated current,
d) manufacturing date.
7.2 The timer shall be packed in a complete package with certain moisture and shock resistance. 393
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QB/T2269--1996
Each packing box must have an inspection certificate. The packing box is firm and durable, suitable for long-distance transportation, and the packing box shall have the following markings. 7.3
a) Manufacturer’s name, address and registered trademark; b) Product name and model;
c) Gross weight (kg);
d) Quantity (pieces);
e) Dimensions of the packaging box (mm: l×bXh); f) Ex-factory date;
g) “Handle with care”, “Upward”, “Moisture-proof” and other signs. 7.4 The packaging boxes should be handled with care during transportation to avoid rain, moisture and collision. 7.5 The packaging boxes should be stored in a well-ventilated warehouse with a temperature of 10℃～40℃ and a relative humidity of no more than 75%. No corrosive gases are allowed in the surrounding air.
Special requirements for signs and packaging can be agreed upon by the supply and demand parties. 7. 66666665. 5.8 Spindle limiter strength
Fix the timer on the bracket with the spindle handle in the horizontal position, first rotate the spindle handle to any limit position, then apply a torque of 0.8N·m to the spindle handle. After 15s, reverse the process again according to the above method. The result should meet the requirements of 4.6. 5.9 Contact pressure
The timer contacts are in a closed state, and the contacts are connected in series in a circuit with an on-off display. Use a dynamometer to measure twice and take the arithmetic mean. The result should meet the requirements of 4.7.
5.10 Contact resistance
The timer contacts are in a closed state. Use a contact resistance tester to measure the contact resistance between the contacts. Measure three times and take the arithmetic mean. The result should meet the requirements of 4.8.
5.11 Contact connection and disconnection capacity
In a load circuit with a voltage of rated value and a current of 1.5 times the rated value, the contact is connected and disconnected 10 times at an operating frequency of 2 times per minute. The result shall comply with the provisions of 4.9. 5.12 Electrical clearance and creepage distance
When the timer housing and the movement are separated, visually observe and use relevant measuring tools to check the electrical clearance and creepage distance between the live and non-live metal parts. The result shall comply with the provisions of 4.10. 5.13 Insulation resistance
When the contacts are closed, use a DC megohmmeter with a voltage level of 500V to measure the resistance with the live part terminal as one pole and the easily accessible non-live metal part as the other pole. The result shall comply with the provisions of 4.11. 391
HiiKAoNiKAca-
5.14 Dielectric strength
QB/T2269—1996
Test under the contact closed state, with the live part terminal as one pole and the easily accessible non-live metal part as the other pole. At the beginning of the test, gradually apply the voltage to half of the specified voltage value, then quickly increase to the test voltage value of 1800V, the current is 10mA, and it lasts for 1min. The result should meet the requirements of 4.12. 5.15 Moisture and heat resistance
The timer is placed in an environment of (40±2)℃ and relative humidity of 90%~95% for 48 hours and then taken out. At room temperature, the surface is immediately wiped dry and the test is completed within 3min. Its performance should meet the requirements of 4.13. 5.16 Heat resistance
Place the timer in a high temperature box at a temperature of (120 ± 5) °C for 1 hour, and measure the time error of the timer in the box. The result should meet the requirements of 4.14.
5.17 Cold resistance
Place the timer in a low temperature box at a temperature of (-15 ± 5) °C for 4 hours, and then move it to room temperature to recover for no less than 1 hour, and measure its timing error. The result should meet the requirements of 4.15. 5.18 Forced return resistance
Connect the timer in the rated load test circuit. During the test, the timer main shaft handle rotates forward and reverse at an average speed of 3 times per minute, with an angle of not less than 120°. The main shaft handle is operated 5000 times (forward and reverse rotation counts as one time), and the contacts should be connected and disconnected once during each operation. After the above test, the result should meet the requirements of 4.16. 5.19 Drop in packaged state
In the finished product warehouse with qualified packaging, take any box, let the bottom edge or side edge be parallel to the ground and 1m above the ground, and let it fall freely on the cement floor under the premise that the initial speed of the box is zero. After two drop tests, open the boxes and check the timers one by one. The results should meet the requirements of 4.17. 6 Inspection rules
6.1 Factory inspection
6.1.1 Factory inspection shall be carried out in accordance with the provisions of GB/T2828. The inspection items, non-conforming categories, sampling plans, inspection levels (IL) and acceptable quality levels (AQL) are shown in Table 1.
Non-conforming categories" Serial number
Inspection items
Working reliability
Timing error
Installation dimensions
Appearance quality
Operating torque
6.1.2 The composition and batch size of the batch shall be agreed upon by the supply and demand parties. Corresponding clauses
6.1.3 Inspection strictness shall be in accordance with 4.6 of GB/T2828-1987. AQL
6.1.4 The judgment of qualified and unqualified in factory inspection shall be carried out in accordance with 4.11 of GB/T2828-1987. Sampling plan
One-time sampling
6.1.5 The disposal after inspection shall be carried out in accordance with 4.12 of GB/T2828-1987. 6.1.6 In the factory inspection, the two requirements of insulation resistance and dielectric strength shall be subject to random inspection, with one-time sampling, and the qualified judgment number is zero. The sample size shall be agreed upon by the supply and demand parties. The samples sampled shall be qualified in both tests. If one sample fails in one test, the factory inspection shall be judged to be unqualified. The manufacturer is allowed to take measures for the unqualified items, and then conduct random inspections after improvement until the room is qualified. 6.2 Type inspection
6.2.1 The cycle of type inspection is generally once a year. Type inspection should also be carried out when one of the following situations occurs: 1) Trial production and identification of new products or old products transferred to the factory for production; 392
QB/T2269—1996
b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c) During normal production, an inspection should be carried out periodically or after accumulating a certain amount of output; d) When the product is resumed after a long period of suspension; e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a type inspection requirement. 6.2.2 Type inspection shall be carried out in accordance with the provisions of GB/T2829. The classification of non-conformity, inspection items, discrimination level, sampling plan and non-conformity quality level (RQL) are shown in Table 2.
Non-conformity classification number
Inspection items
Working reliability
Timing error
Contact pressure
Contact resistance
Operating torque
Forced return resistance
Contact connection and disconnection capacity
Installation dimensions
Appearance quality
Spindle stopper strength
Applicable terms
【Number of samples
Only one non-conformity is allowed in the inspection of items with a sample number of 3. 2 The packaging state drop test shall be agreed upon by the supply and demand parties. 8
6.2.3 The samples for type inspection shall be randomly selected from a batch or several batches that have passed the factory inspection. R
6.2.4 The judgment of qualified and unqualified in type inspection shall be carried out in accordance with the provisions of 4.11 of GB/T 2829-1987. 6.2.5 The disposal after type inspection shall be carried out in accordance with the provisions of 4.12 of GB/T2829-1987. 6.2.6 The type of sampling plan for type inspection can also be agreed upon by the supply and demand parties. Judgment level
Sampling plan
Single sampling
6.2.7 In type inspection, the four safety requirements of electrical clearance and creepage distance, insulation resistance, dielectric strength, and moisture and heat resistance shall be checked by random inspection method, with single sampling, and the qualified judgment number is zero. The sample size of random inspection shall be agreed upon by the supply and demand parties. All four tests of the sample to be checked must be qualified. If one sample fails one item, the type inspection shall be judged to be unqualified. The manufacturer is allowed to take measures for the unqualified items, and then conduct random inspections after improvement until they are qualified.
7 Marking, packaging, transportation and storage
7.1 Each timer shall be marked in an obvious position. The marking content is as follows: a) manufacturer name and registered trademark;
b) product model;
c) rated voltage and rated current,
d) manufacturing date.
7.2 The timer shall be packed in a complete package with certain moisture and shock resistance. 393
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QB/T2269--1996
Each packing box must have an inspection certificate. The packing box is firm and durable, suitable for long-distance transportation, and the packing box shall have the following markings. 7.3
a) Manufacturer’s name, address and registered trademark; b) Product name and model;
c) Gross weight (kg);
d) Quantity (pieces);
e) Dimensions of the packaging box (mm: l×bXh); f) Ex-factory date;
g) “Handle with care”, “Upward”, “Moisture-proof” and other signs. 7.4 The packaging boxes should be handled with care during transportation to avoid rain, moisture and collision. 7.5 The packaging boxes should be stored in a well-ventilated warehouse with a temperature of 10℃～40℃ and a relative humidity of no more than 75%. No corrosive gases are allowed in the surrounding air.
Special requirements for signs and packaging can be agreed upon by the supply and demand parties. 7. 65. 5.8 Spindle limiter strength
Fix the timer on the bracket with the spindle handle in the horizontal position, first rotate the spindle handle to any limit position, then apply a torque of 0.8N·m to the spindle handle. After 15s, reverse the process again according to the above method. The result should meet the requirements of 4.6. 5.9 Contact pressure
The timer contacts are in a closed state, and the contacts are connected in series in a circuit with an on-off display. Use a dynamometer to measure twice and take the arithmetic mean. The result should meet the requirements of 4.7.
5.10 Contact resistance
The timer contacts are in a closed state. Use a contact resistance tester to measure the contact resistance between the contacts. Measure three times and take the arithmetic mean. The result should meet the requirements of 4.8.
5.11 Contact connection and disconnection capacity
In a load circuit with a voltage of rated value and a current of 1.5 times the rated value, the contact is connected and disconnected 10 times at an operating frequency of 2 times per minute. The result shall comply with the provisions of 4.9. 5.12 Electrical clearance and creepage distance
When the timer housing and the movement are separated, visually observe and use relevant measuring tools to check the electrical clearance and creepage distance between the live and non-live metal parts. The result shall comply with the provisions of 4.10. 5.13 Insulation resistance
When the contacts are closed, use a DC megohmmeter with a voltage level of 500V to measure the resistance with the live part terminal as one pole and the easily accessible non-live metal part as the other pole. The result shall comply with the provisions of 4.11. 391
HiiKAoNiKAca-
5.14 Dielectric strength
QB/T2269—1996
Test under the contact closed state, with the live part terminal as one pole and the easily accessible non-live metal part as the other pole. At the beginning of the test, gradually apply the voltage to half of the specified voltage value, then quickly increase to the test voltage value of 1800V, the current is 10mA, and it lasts for 1min. The result should meet the requirements of 4.12. 5.15 Moisture and heat resistance
The timer is placed in an environment of (40±2)℃ and relative humidity of 90%~95% for 48 hours and then taken out. At room temperature, the surface is immediately wiped dry and the test is completed within 3min. Its performance should meet the requirements of 4.13. 5.16 Heat resistance
Place the timer in a high temperature box at a temperature of (120 ± 5) °C for 1 hour, and measure the time error of the timer in the box. The result should meet the requirements of 4.14.
5.17 Cold resistance
Place the timer in a low temperature box at a temperature of (-15 ± 5) °C for 4 hours, and then move it to room temperature to recover for no less than 1 hour, and measure its timing error. The result should meet the requirements of 4.15. 5.18 Forced return resistance
Connect the timer in the rated load test circuit. During the test, the timer main shaft handle rotates forward and reverse at an average speed of 3 times per minute, with an angle of not less than 120°. The main shaft handle is operated 5000 times (forward and reverse rotation counts as one time), and the contacts should be connected and disconnected once during each operation. After the above test, the result should meet the requirements of 4.16. 5.19 Drop in packaged state
In the finished product warehouse with qualified packaging, take any box, let the bottom edge or side edge be parallel to the ground and 1m above the ground, and let it fall freely on the cement floor under the premise that the initial speed of the box is zero. After two drop tests, open the boxes and check the timers one by one. The results should meet the requirements of 4.17. 6 Inspection rules
6.1 Factory inspection
6.1.1 Factory inspection shall be carried out in accordance with the provisions of GB/T2828. The inspection items, non-conforming categories, sampling plans, inspection levels (IL) and acceptable quality levels (AQL) are shown in Table 1.
Non-conforming categories" Serial number
Inspection items
Working reliability
Timing error
Installation dimensions
Appearance quality
Operating torque
6.1.2 The composition and batch size of the batch shall be agreed upon by the supply and demand parties. Corresponding clauses
6.1.3 Inspection strictness shall be in accordance with 4.6 of GB/T2828-1987. AQL
6.1.4 The judgment of qualified and unqualified in factory inspection shall be carried out in accordance with 4.11 of GB/T2828-1987. Sampling plan
One-time sampling
6.1.5 The disposal after inspection shall be carried out in accordance with 4.12 of GB/T2828-1987. 6.1.6 In the factory inspection, the two requirements of insulation resistance and dielectric strength shall be subject to random inspection, with one-time sampling, and the qualified judgment number is zero. The sample size shall be agreed upon by the supply and demand parties. The samples sampled shall be qualified in both tests. If one sample fails in one test, the factory inspection shall be judged to be unqualified. The manufacturer is allowed to take measures for the unqualified items, and then conduct random inspections after improvement until the room is qualified. 6.2 Type inspection
6.2.1 The cycle of type inspection is generally once a year. Type inspection should also be carried out when one of the following situations occurs: 1) Trial production and identification of new products or old products transferred to the factory for production; 392
QB/T2269—1996
b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c) During normal production, an inspection should be carried out periodically or after accumulating a certain amount of output; d) When the product is resumed after a long period of suspension; e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a type inspection requirement. 6.2.2 Type inspection shall be carried out in accordance with the provisions of GB/T2829. The classification of non-conformity, inspection items, discrimination level, sampling plan and non-conformity quality level (RQL) are shown in Table 2.
Non-conformity classification number
Inspection items
Working reliability
Timing error
Contact pressure
Contact resistance
Operating torque
Forced return resistance
Contact connection and disconnection capacity
Installation dimensions
Appearance quality
Spindle stopper strength
Applicable terms
【Number of samples
Only one non-conformity is allowed in the inspection of items with a sample number of 3. 2 The packaging state drop test shall be agreed upon by the supply and demand parties. 8
6.2.3 The samples for type inspection shall be randomly selected from a batch or several batches that have passed the factory inspection. R
6.2.4 The judgment of qualified and unqualified in type inspection shall be carried out in accordance with the provisions of 4.11 of GB/T 2829-1987. 6.2.5 The disposal after type inspection shall be carried out in accordance with the provisions of 4.12 of GB/T2829-1987. 6.2.6 The type of sampling plan for type inspection can also be agreed upon by the supply and demand parties. Judgment level
Sampling plan
Single sampling
6.2.7 In type inspection, the four safety requirements of electrical clearance and creepage distance, insulation resistance, dielectric strength, and moisture and heat resistance shall be checked by random inspection method, with single sampling, and the qualified judgment number is zero. The sample size of random inspection shall be agreed upon by the supply and demand parties. All four tests of the sample to be checked must be qualified. If one sample fails one item, the type inspection shall be judged to be unqualified. The manufacturer is allowed to take measures for the unqualified items, and then conduct random inspections after improvement until they are qualified.
7 Marking, packaging, transportation and storage
7.1 Each timer shall be marked in an obvious position. The marking content is as follows: a) manufacturer name and registered trademark;
b) product model;
c) rated voltage and rated current,
d) manufacturing date.
7.2 The timer shall be packed in a complete package with certain moisture and shock resistance. 393
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QB/T2269--1996
Each packing box must have an inspection certificate. The packing box is firm and durable, suitable for long-distance transportation, and the packing box shall have the following markings. 7.3
a) Manufacturer’s name, address and registered trademark; b) Product name and model;
c) Gross weight (kg);
d) Quantity (pieces);
e) Dimensions of the packaging box (mm: l×bXh); f) Ex-factory date;
g) “Handle with care”, “Upward”, “Moisture-proof” and other signs. 7.4 The packaging boxes should be handled with care during transportation to avoid rain, moisture and collision. 7.5 The packaging boxes should be stored in a well-ventilated warehouse with a temperature of 10℃～40℃ and a relative humidity of no more than 75%. No corrosive gases are allowed in the surrounding air.
Special requirements for signs and packaging can be agreed upon by the supply and demand parties. 7. 68N·m torque, lasting 15s, then reverse the above method once, the result should meet the requirements of 4.6. 5.9 Contact pressure
The timer contact is in a closed state, the contact is connected in series in a circuit with an on-off display, and measured twice with a dynamometer, and the arithmetic mean is taken. The result should meet the requirements of 4.7.
5.10 Contact resistance
The timer contact is in a closed state, and the contact resistance between the contacts is measured with a contact resistance tester. The measurement is three times, and the arithmetic mean is taken. The result should meet the requirements of 4.8.
5.11 Contact connection and disconnection capacity
The contact is connected and disconnected 10 times at an operating frequency of 2 times per minute in a load circuit with a voltage of rated value and a current of 1.5 times the rated value. The result should meet the requirements of 4.9. 5.12 Electrical clearance and creepage distance
When the timer housing is separated from the core, visually observe and use relevant measuring tools to check the electrical clearance and creepage distance between the live and non-live metal parts. The results should comply with the provisions of 4.10. 5.13 Insulation resistance
When the contacts are closed, use a DC megohmmeter with a voltage level of 500V to measure the resistance with the live part terminal as one pole and the easily accessible non-live metal part as the other pole. The results should comply with the provisions of 4.11. 391
HiiKAoNiKAca-
5.14 Dielectric strength
QB/T2269—1996
Test under the contact closed state, with the live part terminal as one pole and the easily accessible non-live metal part as the other pole. At the beginning of the test, gradually apply the voltage to half of the specified voltage value, then quickly increase to the test voltage value of 1800V, the current is 10mA, and it lasts for 1min. The result should meet the requirements of 4.12. 5.15 Moisture and heat resistance
The timer is placed in an environment of (40±2)℃ and relative humidity of 90%~95% for 48 hours and then taken out. At room temperature, the surface is immediately wiped dry and the test is completed within 3min. Its performance should meet the requirements of 4.13. 5.16 Heat resistance
Place the timer in a high temperature box at a temperature of (120 ± 5) °C for 1 hour, and measure the time error of the timer in the box. The result should meet the requirements of 4.14.
5.17 Cold resistance
Place the timer in a low temperature box at a temperature of (-15 ± 5) °C for 4 hours, and then move it to room temperature to recover for no less than 1 hour, and measure its timing error. The result should meet the requirements of 4.15. 5.18 Forced return resistance
Connect the timer in the rated load test circuit. During the test, the timer main shaft handle rotates forward and reverse at an average speed of 3 times per minute, with an angle of not less than 120°. The main shaft handle is operated 5000 times (forward and reverse rotation counts as one time), and the contacts should be connected and disconnected once during each operation. After the above test, the result should meet the requirements of 4.16. 5.19 Drop in packaged state
In the finished product warehouse with qualified packaging, take any box, let the bottom edge or side edge be parallel to the ground and 1m above the ground, and let it fall freely on the cement floor under the premise that the initial speed of the box is zero. After two drop tests, open the boxes and check the timers one by one. The results should meet the requirements of 4.17. 6 Inspection rules
6.1 Factory inspection
6.1.1 Factory inspection shall be carried out in accordance with the provisions of GB/T2828. The inspection items, non-conforming categories, sampling plans, inspection levels (IL) and acceptable quality levels (AQL) are shown in Table 1.
Non-conforming categories" Serial number
Inspection items
Working reliability
Timing error
Installation dimensions
Appearance quality
Operating torque
6.1.2 The composition and batch size of the batch shall be agreed upon by the supply and demand parties. Corresponding clauses
6.1.3 Inspection strictness shall be in accordance with 4.6 of GB/T2828-1987. AQL
6.1.4 The judgment of qualified and unqualified in factory inspection shall be carried out in accordance with 4.11 of GB/T2828-1987. Sampling plan
One-time sampling
6.1.5 The disposal after inspection shall be carried out in accordance with 4.12 of GB/T2828-1987. 6.1.6 In the factory inspection, the two requirements of insulation resistance and dielectric strength shall be subject to random inspection, with one-time sampling, and the qualified judgment number is zero. The sample size shall be agreed upon by the supply and demand parties. The samples sampled shall be qualified in both tests. If one sample fails in one test, the factory inspection shall be judged to be unqualified. The manufacturer is allowed to take measures for the unqualified items, and then conduct random inspections after improvement until the room is qualified. 6.2 Type inspection
6.2.1 The cycle of type inspection is generally once a year. Type inspection should also be carried out when one of the following situations occurs: 1) Trial production and identification of new products or old products transferred to the factory for production; 392
QB/T2269—1996
b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c) During normal production, an inspection should be carried out periodically or after accumulating a certain amount of output; d) When the product is resumed after a long period of suspension; e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a type inspection requirement. 6.2.2 Type inspection shall be carried out in accordance with the provisions of GB/T2829. The classification of non-conformity, inspection items, discrimination level, sampling plan and non-conformity quality level (RQL) are shown in Table 2.
Non-conformity classification number
Inspection items
Working reliability
Timing error
Contact pressure
Contact resistance
Operating torque
Forced return resistance
Contact connection and disconnection capacity
Installation dimensions
Appearance quality
Spindle stopper strength
Applicable terms
【Number of samples
Only one non-conformity is allowed in the inspection of items with a sample number of 3. 2 The packaging state drop test shall be agreed upon by the supply and demand parties. 8
6.2.3 The samples for type inspection shall be randomly selected from a batch or several batches that have passed the factory inspection. R
6.2.4 The judgment of qualified and unqualified in type inspection shall be carried out in accordance with the provisions of 4.11 of GB/T 2829-1987. 6.2.5 The disposal after type inspection shall be carried out in accordance with the provisions of 4.12 of GB/T2829-1987. 6.2.6 The type of sampling plan for type inspection can also be agreed upon by the supply and demand parties. Judgment level
Sampling plan
Single sampling
6.2.7 In type inspection, the four safety requirements of electrical clearance and creepage distance, insulation resistance, dielectric strength, and moisture and heat resistance shall be checked by random inspection method, with single sampling, and the qualified judgment number is zero. The sample size of random inspection shall be agreed upon by the supply and demand parties. All four tests of the sample to be checked must be qualified. If one sample fails one item, the type inspection shall be judged to be unqualified. The manufacturer is allowed to take measures for the unqualified items, and then conduct random inspections after improvement until they are qualified.
7 Marking, packaging, transportation and storage
7.1 Each timer shall be marked in an obvious position. The marking content is as follows: a) manufacturer name and registered trademark;
b) product model;
c) rated voltage and rated current,
d) manufacturing date.
7.2 The timer shall be packed in a complete package with certain moisture and shock resistance. 393
i KAoNi KAca-
QB/T2269--1996
Each packing box must have an inspection certificate. The packing box is firm and durable, suitable for long-distance transportation, and the packing box shall have the following markings. 7.3
a) Manufacturer’s name, address and registered trademark; b) Product name and model;
c) Gross weight (kg);
d) Quantity (pieces);
e) Dimensions of the packaging box (mm: l×bXh); f) Ex-factory date;
g) “Handle with care”, “Upward”, “Moisture-proof” and other signs. 7.4 The packaging boxes should be handled with care during transportation to avoid rain, moisture and collision. 7.5 The packaging boxes should be stored in a well-ventilated warehouse with a temperature of 10℃～40℃ and a relative humidity of no more than 75%. No corrosive gases are allowed in the surrounding air.
Special requirements for signs and packaging can be agreed upon by the supply and demand parties. 7. 68N·m torque, lasting 15s, then reverse the above method once, the result should meet the requirements of 4.6. 5.9 Contact pressure
The timer contact is in a closed state, the contact is connected in series in a circuit with an on-off display, and measured twice with a dynamometer, and the arithmetic mean is taken. The result should meet the requirements of 4.7.
5.10 Contact resistance
The timer contact is in a closed state, and the contact resistance between the contacts is measured with a contact resistance tester. The measurement is three times, and the arithmetic mean is taken. The result should meet the requirements of 4.8.
5.11 Contact connection and disconnection capacity
The contact is connected and disconnected 10 times at an operating frequency of 2 times per minute in a load circuit with a voltage of rated value and a current of 1.5 times the rated value. The result should meet the requirements of 4.9. 5.12 Electrical clearance and creepage distance
When the timer housing is separated from the core, visually observe and use relevant measuring tools to check the electrical clearance and creepage distance between the live and non-live metal parts. The results should comply with the provisions of 4.10. 5.13 Insulation resistance
When the contacts are closed, use a DC megohmmeter with a voltage level of 500V to measure the resistance with the live part terminal as one pole and the easily accessible non-live metal part as the other pole. The results should comply with the provisions of 4.11. 391
HiiKAoNiKAca-
5.14 Dielectric strength
QB/T2269—1996
Test under the contact closed state, with the live part terminal as one pole and the easily accessible non-live metal part as the other pole. At the beginning of the test, gradually apply the voltage to half of the specified voltage value, then quickly increase to the test voltage value of 1800V, the current is 10mA, and it lasts for 1min. The result should meet the requirements of 4.12. 5.15 Moisture and heat resistance
The timer is placed in an environment of (40±2)℃ and relative humidity of 90%~95% for 48 hours and then taken out. At room temperature, the surface is immediately wiped dry and the test is completed within 3min. Its performance should meet the requirements of 4.13. 5.16 Heat resistance
Place the timer in a high temperature box at a temperature of (120 ± 5) °C for 1 hour, and measure the time error of the timer in the box. The result should meet the requirements of 4.14.
5.17 Cold resistance
Place the timer in a low temperature box at a temperature of (-15 ± 5) °C for 4 hours, and then move it to room temperature to recover for no less than 1 hour, and measure its timing error. The result should meet the requirements of 4.15. 5.18 Forced return resistance
Connect the timer in the rated load test circuit. During the test, the timer main shaft handle rotates forward and reverse at an average speed of 3 times per minute, with an angle of not less than 120°. The main shaft handle is operated 5000 times (forward and reverse rotation counts as one time), and the contacts should be connected and disconnected once during each operation. After the above test, the result should meet the requirements of 4.16. 5.19 Drop in packaged state
In the finished product warehouse with qualified packaging, take any box, let the bottom edge or side edge be parallel to the ground and 1m above the ground, and let it fall freely on the cement floor under the premise that the initial speed of the box is zero. After two drop tests, open the boxes and check the timers one by one. The results should meet the requirements of 4.17. 6 Inspection rules
6.1 Factory inspection
6.1.1 Factory inspection shall be carried out in accordance with the provisions of GB/T2828. The inspection items, non-conforming categories, sampling plans, inspection levels (IL) and acceptable quality levels (AQL) are shown in Table 1.
Non-conforming categories" Serial number
Inspection items
Working reliability
Timing error
Installation dimensions
Appearance quality
Operating torque
6.1.2 The composition and batch size of the batch shall be agreed upon by the supply and demand parties. Corresponding clauses
6.1.3 Inspection strictness shall be in accordance with 4.6 of GB/T2828-1987. AQL
6.1.4 The judgment of qualified and unqualified in factory inspection shall be carried out in accordance with 4.11 of GB/T2828-1987. Sampling plan
One-time sampling
6.1.5 The disposal after inspection shall be carried out in accordance with 4.12 of GB/T2828-1987. 6.1.6 In the factory inspection, the two requirements of insulation resistance and dielectric strength shall be subject to random inspection, with one-time sampling, and the qualified judgment number is zero. The sample size shall be agreed upon by the supply and demand parties. The samples sampled shall be qualified in both tests. If one sample fails in one test, the factory inspection shall be judged to be unqualified. The manufacturer is allowed to take measures for the unqualified items, and then conduct random inspections after improvement until the room is qualified. 6.2 Type inspection
6.2.1 The cycle of type inspection is generally once a year. Type inspection should also be carried out when one of the following situations occurs: 1) Trial production and identification of new products or old products transferred to the factory for production; 392
QB/T2269—1996
b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c) During normal production, an inspection should be carried out periodically or after accumulating a certain amount of output; d) When the product is resumed after a long period of suspension; e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a type inspection requirement. 6.2.2 Type inspection shall be carried out in accordance with the provisions of GB/T2829. The classification of non-conformity, inspection items, discrimination level, sampling plan and non-conformity quality level (RQL) are shown in Table 2.
Non-conformity classification number
Inspection items
Working reliability
Timing error
Contact pressure
Contact resistance
Operating torque
Forced return resistance
Contact connection and disconnection capacity
Installation dimensions
Appearance quality
Spindle stopper strength
Applicable terms
【Number of samples
Only one non-conformity is allowed in the inspection of items with a sample number of 3. 2 The packaging state drop test shall be agreed upon by the supply and demand parties. 8
6.2.3 The samples for type inspection shall be randomly selected from a batch or several batches that have passed the factory inspection. R
6.2.4 The judgment of qualified and unqualified in type inspection shall be carried out in accordance with the provisions of 4.11 of GB/T 2829-1987. 6.2.5 The disposal after type inspection shall be carried out in accordance with the provisions of 4.12 of GB/T2829-1987. 6.2.6 The type of sampling plan for type inspection can also be agreed upon by the supply and demand parties. Judgment level
Sampling plan
Single sampling
6.2.7 In type inspection, the four safety requirements of electrical clearance and creepage distance, insulation resistance, dielectric strength, and moisture and heat resistance shall be checked by random inspection method, with single sampling, and the qualified judgment number is zero. The sample size of random inspection shall be agreed upon by the supply and demand parties. All four tests of the sample to be checked must be qualified. If one sample fails one item, the type inspection shall be judged to be unqualified. The manufacturer is allowed to take measures for the unqualified items, and then conduct random inspections after improvement until they are qualified.
7 Marking, packaging, transportation and storage
7.1 Each timer shall be marked in an obvious position. The marking content is as follows: a) manufacturer name and registered trademark;
b) product model;
c) rated voltage and rated current,
d) manufacturing date.
7.2 The timer shall be packed in a complete package with certain moisture and shock resistance. 393
i KAoNi KAca-
QB/T2269--1996
Each packing box must have an inspection certificate. The packing box is firm and durable, suitable for long-distance transportation, and the packing box shall have the following markings. 7.3
a) Manufacturer’s name, address and registered trademark; b) Product name and model;
c) Gross weight (kg);
d) Quantity (pieces);
e) Dimensions of the packaging box (mm: l×bXh); f) Ex-factory date;
g) “Handle with care”, “Upward”, “Moisture-proof” and other signs. 7.4 The packaging boxes should be handled with care during transportation to avoid rain, moisture and collision. 7.5 The packaging boxes should be stored in a well-ventilated warehouse with a temperature of 10℃～40℃ and a relative humidity of no more than 75%. No corrosive gases are allowed in the surrounding air.
Special requirements for signs and packaging can be agreed upon by the supply and demand parties. 7. 68.
5.11 Contact connection and disconnection capacity
In a load circuit with a voltage of rated value and a current of 1.5 times the rated value, the contact is connected and disconnected 10 times at an operating frequency of 2 times per minute. The result shall comply with the provisions of 4.9. 5.12 Electrical clearance and creepage distance
When the timer housing and the movement are separated, visually observe and use relevant measuring tools to check the electrical clearance and creepage distance between the live and non-live metal parts. The result shall comply with the provisions of 4.10. 5.13 Insulation resistance
When the contacts are closed, use a DC megohmmeter with a voltage level of 500V to measure the resistance with the live part terminal as one pole and the easily accessible non-live metal part as the other pole. The result shall comply with the provisions of 4.11. 391
HiiKAoNiKAca-
5.14 Dielectric strength
QB/T2269—1996
Test under the contact closed state, with the live part terminal as one pole and the easily accessible non-live metal part as the other pole. At the beginning of the test, gradually apply the voltage to half of the specified voltage value, then quickly increase to the test voltage value of 1800V, the current is 10mA, and it lasts for 1min. The result should meet the requirements of 4.12. 5.15 Moisture and heat resistance
The timer is placed in an environment of (40±2)℃ and relative humidity of 90%~95% for 48 hours and then taken out. At room temperature, the surface is immediately wiped dry and the test is completed within 3min. Its performance should meet the requirements of 4.13. 5.16 Heat resistance
Place the timer in a high temperature box at a temperature of (120 ± 5) °C for 1 hour, and measure the time error of the timer in the box. The result should meet the requirements of 4.14.
5.17 Cold resistance
Place the timer in a low temperature box at a temperature of (-15 ± 5) °C for 4 hours, and then move it to room temperature to recover for no less than 1 hour, and measure its timing error. The result should meet the requirements of 4.15. 5.18 Forced return resistance
Connect the timer in the rated load test circuit. During the test, the timer main shaft handle rotates forward and reverse at an average speed of 3 times per minute, with an angle of not less than 120°. The main shaft handle is operated 5000 times (forward and reverse rotation counts as one time), and the contacts should be connected and disconnected once during each operation. After the above test, the result should meet the requirements of 4.16. 5.19 Drop in packaged state
In the finished product warehouse with qualified packaging, take any box, let the bottom edge or side edge be parallel to the ground and 1m above the ground, and let it fall freely on the cement floor under the premise that the initial speed of the box is zero. After two drop tests, open the boxes and check the timers one by one. The results should meet the requirements of 4.17. 6 Inspection rules
6.1 Factory inspection
6.1.1 Factory inspection shall be carried out in accordance with the provisions of GB/T2828. The inspection items, non-conforming categories, sampling plans, inspection levels (IL) and acceptable quality levels (AQL) are shown in Table 1.
Non-conforming categories" Serial number
Inspection items
Working reliability
Timing error
Installation dimensions
Appearance quality
Operating torque
6.1.2 The composition and batch size of the batch shall be agreed upon by the supply and demand parties. Corresponding clauses
6.1.3 Inspection strictness shall be in accordance with 4.6 of GB/T2828-1987. AQL
6.1.4 The judgment of qualified and unqualified in factory inspection shall be carried out in accordance with 4.11 of GB/T2828-1987. Sampling plan
One-time sampling
6.1.5 The disposal after inspection shall be carried out in accordance with 4.12 of GB/T2828-1987. 6.1.6 In the factory inspection, the two requirements of insulation resistance and dielectric strength shall be subject to random inspection, with one-time sampling, and the qualified judgment number is zero. The sample size shall be agreed upon by the supply and demand parties. The samples sampled shall be qualified in both tests. If one sample fails in one test, the factory inspection shall be judged to be unqualified. The manufacturer is allowed to take measures for the unqualified items, and then conduct random inspections after improvement until the room is qualified. 6.2 Type inspection
6.2.1 The cycle of type inspection is generally once a year. Type inspection should also be carried out when one of the following situations occurs: 1) Trial production and identification of new products or old products transferred to the factory for production; 392
QB/T2269—1996
b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c) During normal production, an inspection should be carried out periodically or after accumulating a certain amount of output; d) When the product is resumed after a long period of suspension; e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a type inspection requirement. 6.2.2 Type inspection shall be carried out in accordance with the provisions of GB/T2829. The classification of non-conformity, inspection items, discrimination level, sampling plan and non-conformity quality level (RQL) are shown in Table 2.
Non-conformity classification number
Inspection items
Working reliability
Timing error
Contact pressure
Contact resistance
Operating torque
Forced return resistance
Contact connection and disconnection capacity
Installation dimensions
Appearance quality
Spindle stopper strength
Applicable terms
【Number of samples
Only one non-conformity is allowed in the inspection of items with a sample number of 3. 2 The packaging state drop test shall be agreed upon by the supply and demand parties. 8
6.2.3 The samples for type inspection shall be randomly selected from a batch or several batches that have passed the factory inspection. R
6.2.4 The judgment of qualified and unqualified in type inspection shall be carried out in accordance with the provisions of 4.11 of GB/T 2829-1987. 6.2.5 The disposal after type inspection shall be carried out in accordance with the provisions of 4.12 of GB/T2829-1987. 6.2.6 The type of sampling plan for type inspection can also be agreed upon by the supply and demand parties. Judgment level
Sampling plan
Single sampling
6.2.7 In type inspection, the four safety requirements of electrical clearance and creepage distance, insulation resistance, dielectric strength, and moisture and heat resistance shall be checked by random inspection method, with single sampling, and the qualified judgment number is zero. The sample size of random inspection shall be agreed upon by the supply and demand parties. All four tests of the sampl
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