This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of electromagnetic yoke flaw detectors. This standard is applicable to AC and DC electromagnetic yoke magnetic particle flaw detectors with a magnetic pole spacing of 75 to 225 mm. JB/T 7411-1994 Technical requirements for electromagnetic yoke flaw detectors JB/T7411-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Electromagnetic Yoke Flaw Detectors
1 Subject Content and Scope of Application
JB/T7411-94
This standard specifies the technical requirements, test methods, inspection rules and markings, packaging, transportation and storage of electromagnetic yoke flaw detectors (hereinafter referred to as flaw detectors).
This standard applies to AC and DC electromagnetic yoke magnetic particle flaw detectors with a magnetic pole spacing of 75~225mm. 2
Referenced Standards
1 General Technical Requirements for Testing Machines
GB/T2611
Technical Requirements for Packaging, Packaging Marking, Storage and Transportation of Testing Machines JB/T6147
3 Terminology
3.1 Electromagnetic Wheel
Yoke-shaped electromagnet. Usually composed of a C-shaped or II-shaped solid or laminated soft magnetic material surrounded by a current coil. 3.2 Effective magnetization range
The maximum magnetization area that meets the requirements of flaw detection sensitivity. 3.3 Suction
The attraction between the magnetic extreme end face of the yoke and the flaw detection surface, also known as the lifting force. 4
Technical requirements
The flaw detector should work normally under the following conditions; 4.1
Ambient temperature: 0~40℃;
Relative humidity of air is not more than 80%;
The power supply voltage fluctuation shall not exceed ±10% of the rated power supply voltage; There shall be no large amount of dust, flammable or corrosive gases in the surrounding environment. The rated working voltage error of the flaw detector shall not exceed ±5% of the rated value. 4.23
4.3 The rated working current error of the flaw detector shall not exceed ±5% of the rated value. 4.4 The rated working rate error of the flaw detector shall not exceed ±10% of the rated value. 4.5 The effective magnetization range of the flaw detector should not be less than the rectangular area whose length is the difference between the magnetic pole spacing and the magnetic pole side length and whose width is 1/4 of the magnetic pole spacing. As shown in Figure 1.
4.6 The suction force of the AC flaw detector should not be less than 44N (the mass of the sucked object is about 4.5kg), and the suction force of the DC flaw detector should not be less than 177N (the mass of the sucked object is about 18.1kg).
4.7 The magnetization time of the flaw detector shall not be less than 0.5s, and the reuse rate shall not be less than 50%. 4.8 For a flaw detector with a movable joint magnetic pole, its movable joint shall rotate flexibly. 4.9 The insulation resistance of the flaw detector shall not be less than 5Mα. 4.10 The power supply line and the shell, the primary and the secondary of the flaw detector should be able to withstand the test voltage specified in Table 1, and there should be no arcing and breakdown for 1 minute. Approved by the Ministry of Machinery Industry of the People's Republic of China on August 23, 1994 and implemented on May 1, 1995.
National Road Voltage (V)
JB/T7411-94
Figure 1 Effective magnetization range
[-pole spacing a-pole side length
Other requirements such as the appearance quality of the flaw detector should comply with the relevant provisions of GB/T2611. Test voltage (kV)
The flaw detector works continuously for 4h at the repetitive use rate, the maximum temperature of the handle should not exceed 45℃, the surface temperature of the yoke should not exceed 80℃, 4.12
The temperature of the transformer and the pole line should not exceed 105℃4.13
After the temperature and humidity resistance test is carried out according to the parameters specified in Table 2, the performance indicators of the flaw detector shall comply with the provisions of this standard. Table 2
Minimum temperature
Maximum temperature
Duration
Relative humidity
(40℃）
Duration
Minimum temperature
Maximum temperature
Duration
Recovery time
The flaw detector shall be able to withstand the collision and drop test specified in Table 3 under the conditions of transportation packaging, and the performance indicators after the test shall meet the requirements of this standard.
Peak acceleration
Pulse duration
Pulse repetition frequency
Continuous number of impacts
Pulse waveform
Drop height
Drop method
Number of drops
100m/s*±10m/s
11ms±:2ms
1000±10 times
Approximately half-sine wave
The bottom of the package is horizontal and falls in free fall for 4 times
Test method
JB/T7411—94
5.1 In the test, the working conditions of 4.1 can be used. If any fault occurs, the following test conditions shall be used: a. Ambient temperature: 20±2℃; Relative humidity: 60%±15%; Atmospheric pressure: 86~106kPa; The power supply voltage change shall not exceed ±2% of the rated voltage; Avoid interference from external electromagnetic fields and the influence of external mechanical vibration and impact. 5.2 Main instruments and equipment used in the test 5.2.1
DC megohmmeter: 500V;
voltage withstand test device: 0~3000V, not less than 0.5kVA; AC and DC ammeter: 0.5 level;
AC and DC voltmeter: 0.5 level;
semiconductor thermometer;
Wheatstone bridge;
voltage regulating transformer;
frequency meter (or oscilloscope);
high and low temperature box;
vibration table.
Magnetic powder for magnetic particle inspection:
Magnetic suspension:
Carrier liquid: water or kerosene. When water is used as carrier liquid, appropriate amount of dispersant, rust inhibitor and defoaming agent should be put into the magnetic suspension. Concentration: The concentration of fluorescent magnetic powder suspension is generally 0.5~2g/L; the concentration of non-fluorescent magnetic powder suspension is generally 7~20g/Lsc.
Standard test pieces for magnetic particle flaw detection: A1—7/15/100, A1--30/100; Test block 1: 400mm×400mm×5mmA3 steel plate; Test block 2400mm×400mm×2mmA3 steel plate: Test block 3: A3 steel plate with an area not less than 300mm×100mm and a mass of 4.5kg; Test block 4: A3 pot plate with an area not less than 300mm×100mm and a mass of 18.1kg. 5.3
Rated voltage error, rated current error
Testing instruments
Voltage regulating transformer;
AC and DC voltmeters;
AC and DC ammeters.
The voltage-regulating transformer is connected between the power supply and the flaw detector. A voltmeter is connected in parallel and an ammeter is connected in series at the output end of the flaw detector. Turn on the power supply of the instrument and adjust the output of the voltage-regulating transformer to the rated value according to the rated power supply voltage of the flaw detector. Turn on the excitation switch of the flaw detector 5.3.3
and measure the working voltage U. and working current I. Assume that the rated working voltage and rated working current of the flaw detector are U and 1 respectively. The relative error is calculated by formula 1 and formula 2 respectively: 5.3.4
×100%
Where: AU-rated working voltage error; (1)
U-rated working voltage, V;
U.-actual working voltage, V.
Where: I--rated working current error:
1—rated working current, A;
I,-actual working current, A.
5.4 Rated frequency error
5.4.1 Test instrument
Regulating transformer;
Frequency meter (or oscilloscope). Www.bzxZ.net
JB/T7411-94
41=4-1
5.4.2 Use a frequency meter to test the working frequency of the flaw detector, and then calculate the relative error using the measured working frequency and the rated working rate. (2)
5.4.3 When there is no frequency meter, it is allowed to use an oscilloscope. The test method is as follows: Connect the output of the flaw detector to the vertical input terminal of the oscilloscope. Then adjust the vertical sensitivity and scanning speed of the oscilloscope so that at least one complete and stable periodic waveform is obtained on the oscilloscope screen. Use the horizontal division number of a complete cycle to calculate the period T, and then use formula 3 to calculate the frequency value: S
Where: f--frequency, Hz;
T-period,.
Then use the measured working frequency and the rated working frequency to calculate the relative error. 5.5 Effective magnetization range
(3)
5.5.1 Test block 1 for AC flaw detector, A1-15/100 standard test piece; test block 2 for DC flaw detector, A1-30/100 standard test piece. Draw a rectangle as shown in Figure 1 on the test block, stick a standard test piece at the center of the drawn rectangle and at any two diagonals, and tilt the test block 15°.
5.5.2 Place the flaw detector yoke on this test block. Make the center of the yoke coincide with the center of the drawn rectangle, turn on the flaw detector power, turn on the excitation switch, and pour the magnetic suspension on the test piece at the same time. When the magnetic suspension disappears from the test piece naturally, the test piece should be able to clearly show a straight magnetic mark. 5.6 Suction
Put the flaw detector yoke on test block 3 (or test block 4), turn on the power of the flaw detector, and turn on the excitation switch, then the yoke should absorb the test block. 5.7 Movable joint magnetic pole
Turn the movable joint of the flaw detector by hand, it should be flexible and free. 5.8 Insulation resistance
The flaw detector is in a non-working state, the switch is in the on position, and a 500V DC megohmmeter is used to test the insulation resistance between the power supply line and the housing.
5.9 Withstand voltage test
5.9.1 The flaw detector is in a non-working state, the switch is in the on position, and the test voltage specified in Table 1 is applied between the power supply line and the housing, and between the primary and secondary.
5.9.2 The test voltage generated by the voltage test device should be a sine wave with a distortion coefficient not exceeding 5%, a rate of 50Hz±5%, and a maximum output current not less than 5mA.
5.10 Other requirements
Inspect by visual inspection.
5.11 Maximum temperature
5.11.1 Use a Wheatstone bridge to measure the cold resistance R of the flaw detector power transformer and the yoke coil, and record the room temperature t at that time. 5.11.2 Place the yoke flat on the test block 1, connect the flaw detector power supply, and work continuously for 4 hours according to the repetitive use rate (or equivalent current). Calculate the equivalent current according to 440
Equation 4:
Where; I..Equivalent current, A
I---Rated working current.A:
t--Magnetization time, s;
T-Working cycle, s.
JB/T7411-94
5.11.3 Use the Wheatstone bridge to measure the hot resistance R: of the power transformer and yoke coil of the flaw detector, and use formula 5 to calculate the hot temperature of the coil:
Where; t-hot temperature of the coil, ℃;
t}--temperature of the coil before the test, ℃;
R.--hot resistance of the coil.n
R,--resistance of the coil at t, a.
R=R(235+t)+t
5.11.4 Use a semiconductor thermometer to measure the surface temperature of the handle and yoke. 5.12 Temperature and humidity resistance
（5）
5.12.1 When conducting temperature tests, the temperature in the high and low temperature boxes should be kept constant and uniform, with a temperature difference of no more than ±2℃, and the volume should be at least 3 times that of the flaw detector under test. If necessary. Measures that do not violate the purpose of the temperature test may be taken, such as sealing the high and low temperature boxes and injecting dry air, to prevent the influence of humidity.
5.12.2 Upper limit temperature test of the working range: Place the flaw detector in the high temperature box and put it in the power-off state. The temperature in the box rises to the value specified in Table 2. After the specified duration, perform a performance check. 5.12.3 Upper limit temperature test of extreme conditions: Put the flaw detector power switch in the on position, and the temperature in the box rises to the value specified in Table 2. After the specified duration, take the flaw detector out of the box and restore it to the working range conditions for 4 hours before performing a performance check. 5.12.4 Lower limit temperature test of the working range: Put the flaw detector in the power-off state into the low temperature box only, and the temperature in the box drops to the value specified in Table 2. After the specified duration, perform a performance check.
5 Limit condition lower limit temperature test: The power switch of the flaw detector is in the on position, and the temperature in the box drops to the value specified in Table 2. After the specified duration, the temperature in the box rises to the lower limit temperature value of the working range at a rate of 0.5~1℃/min. Take out the flaw detector, and restore it under the working range conditions for 4 hours before performing a performance check. (After the low temperature test, if there is condensation on the flaw detector, the preheating time should be appropriately extended, or other methods such as fans should be used to quickly remove moisture before performing a performance check.) 5.12.6 The air in the wet box should be able to circulate evenly, and the volume should be at least 3 times that of the flaw detector to ensure that the temperature change in the box is within ±2℃ and the humidity change is within ±3% within the specified time, and to prevent condensation from falling on the flaw detector. 5.12.7 If the flaw detector has components that are particularly sensitive to the influence of turbidity, it is allowed to be taken out or replaced by other measures. 5.12.8 Humidity test of working range: Put the flaw detector into a high temperature box with the power switch on. First, raise the temperature to the value specified in Table 2 and keep it for 1 hour. Then start to input water vapor and make the humidity in the box reach the value specified in Table 2 within 1 hour. After the specified duration, perform performance inspection.
8 Collision and drop test method
Perform in accordance with the provisions of Table 3.
5.14 The performance inspection items in the environmental tests of 5.12 and 5.13 should at least include the appearance quality, insulation resistance and withstand voltage of the flaw detector. Other performances shall be sampled by the quality inspection department as needed when necessary. 6 Inspection rules
6.1 Factory inspection
JB/T741194
1 Each flaw detector must be inspected and qualified by the manufacturer's quality department according to the requirements of the factory inspection items of this standard, and the product certificate must be issued before it can be produced6.1.1
: The measured data of the main items of the factory inspection should be recorded in the random documents. 6.1.2 The factory inspection items include Articles 4.6, 4.8~4.11 of this standard. 6.2 Type inspection
6.2.1 The following situations shall be subject to type inspection according to this standard: new product trial production or old product transfer production finalization identification; a.
When the product is officially produced, its structural design, materials, processes and key supporting components have major changes that may affect the normal production of the product, and regular or accumulated--After a certain amount of production, it should be inspected periodically (about 2 to 3 years); when the product is resumed after a long-term suspension of production; when the national quality supervision agency proposes a requirement for type inspection. Type inspection items include all technical requirements of this standard. 6.3 Judgment rules
6.3.1 For factory inspection, the qualified rate of all inspected items of each flaw detector must reach 100% to be qualified. 6.3.2
For type inspection, at least two units shall be sampled each time. After inspection, if one product fails, it shall be judged as unqualified. 7
Complete Set and Random Documents
The complete set of flaw detectors includes:
Flaw detector;
Magnetic yoke;
Fuse:
Necessary spare parts and tools.
The following documents are provided with the flaw detector:
Product instruction manual (the manual should indicate the standard code, serial number, year and name implemented, etc.); product export certificate;
Packing list.
Marking, packaging, transportation and storage
8.1 Marking
The flaw detector should have a nameplate, the contents of which include: 8.1.1
Name;
Model;
Manufacturer name;
Factory date:
Factory number
The shipping and receiving marks and storage and transportation diagram marks on the packaging box should comply with the provisions of Chapter 5 of JB/T6147. The packaging marks should not be blurred due to long time or rain erosion. 8.2
Product packaging should comply with the relevant provisions of JB/T6147. 8.3
Transportation and storage
The transportation and storage of the flaw detector should comply with the provisions of Chapter 6 of JB/T6147. 442
Additional Notes:
JB/T7411-94
This standard is proposed and managed by Changchun Testing Machine Research Institute. This standard is drafted by Changchun Testing Machine Research Institute. The main drafters of this standard are Zheng Jiqing, Xie Peicheng and Zhang Xiwang. 443A:
t--magnetization time, s;
T--working cycle, s.
JB/T7411-94
5.11.3 Use the Wheatstone bridge to measure the hot resistance R: of the power transformer and yoke coil of the flaw detector, and use formula 5 to calculate the hot temperature of the coil:
Where; t-hot temperature of the coil, ℃;
t}--temperature of the coil before the test, ℃;
R.--hot resistance of the coil.n
R,--resistance of the coil at t, a.
R=R(235+t)+t
5.11.4 Use a semiconductor thermometer to measure the surface temperature of the handle and yoke. 5.12 Temperature and humidity resistance
(5)
5.12.1 During the temperature test, the temperature in the high and low temperature boxes shall be kept constant and uniform, with a temperature difference of no more than ±2°C. The volume shall be at least three times that of the tested flaw detector. If necessary, measures that do not violate the purpose of the temperature test may be taken, such as sealing the high and low temperature boxes and injecting dry air, to prevent the influence of humidity.
5.12.2 Upper limit temperature test of the working range: Place the flaw detector in the high temperature box and put it in the power-off state. The temperature in the box rises to the value specified in Table 2. After the specified duration, the performance check is carried out. 5.12.3 Upper limit temperature test of extreme conditions: Put the power switch of the flaw detector in the on position. The temperature in the box rises to the value specified in Table 2. After the specified duration, the flaw detector is taken out of the box and restored to the working range conditions for 4 hours before the performance check is carried out. 5.12.4 Temperature test at the lower limit of the working range: Put the power-off flaw detector into the low temperature box, and the temperature in the box drops to the value specified in Table 2. After the specified duration, perform a performance check.
5 Temperature test at the lower limit of the extreme conditions: The power switch of the flaw detector is in the on position, and the temperature in the box drops to the value specified in Table 2. After the specified duration, the temperature in the box rises to the lower limit of the working range at a rate of 0.5-1℃/min. Take out the flaw detector, and restore it under the working range conditions for 4 hours before performing a performance check. (After the low temperature test, if there is condensation on the flaw detector, the preheating time should be appropriately extended, or other methods such as fans should be used to quickly remove moisture before performing a performance check.) 5.12.6 The air in the wet box should be able to circulate evenly, and the volume should be at least 3 times that of the flaw detector, so as to ensure that the temperature change in the box is within ±2℃ and the humidity change is within ±3% within the specified time, and to prevent condensation from falling on the flaw detector. 5.12.7 If the flaw detector has components that are particularly sensitive to the influence of the mixing degree, it is allowed to be removed or replaced by other measures. 5.12.8 Humidity test of working range: Put the flaw detector into a high temperature box with the power switch in the on position, first raise the temperature to the value specified in Table 2, maintain for 1 hour, then start to input water vapor, and make the humidity in the box reach the value specified in Table 2 within 1 hour, and perform performance inspection after the specified duration.
8 Collision and drop test method
Perform in accordance with the provisions of Table 3.
5.14 The performance inspection items in the environmental tests of 5.12 and 5.13 should at least include the appearance quality, insulation resistance and withstand voltage of the flaw detector. Other performances shall be sampled by the quality inspection department as needed when necessary. 6 Inspection rules
6.1 Factory inspection
JB/T741194
1 Each flaw detector must be inspected and qualified by the manufacturer's quality department according to the requirements of the factory inspection items of this standard, and the product certificate must be issued before it can be produced6.1.1
: The measured data of the main items of the factory inspection should be recorded in the random documents. 6.1.2 The factory inspection items include Articles 4.6, 4.8~4.11 of this standard. 6.2 Type inspection
6.2.1 The following situations shall be subject to type inspection according to this standard: new product trial production or old product transfer production finalization identification; a.
When the product is officially produced, its structural design, materials, processes and key supporting components have major changes that may affect the normal production of the product, and regular or accumulated--After a certain amount of production, it should be inspected periodically (about 2 to 3 years); when the product is resumed after a long-term suspension of production; when the national quality supervision agency proposes a requirement for type inspection. Type inspection items include all technical requirements of this standard. 6.3 Judgment rules
6.3.1 For factory inspection, the qualified rate of all inspected items of each flaw detector must reach 100% to be qualified. 6.3.2
For type inspection, at least two units shall be sampled each time. After inspection, if one product fails, it shall be judged as unqualified. 7
Complete Set and Random Documents
The complete set of flaw detectors includes:
Flaw detector;
Magnetic yoke;
Fuse:
Necessary spare parts and tools.
The following documents are provided with the flaw detector:
Product instruction manual (the manual should indicate the standard code, serial number, year and name implemented, etc.); product export certificate;
Packing list.
Marking, packaging, transportation and storage
8.1 Marking
The flaw detector should have a nameplate, the contents of which include: 8.1.1
Name;
Model;
Manufacturer name;
Factory date:
Factory number
The shipping and receiving marks and storage and transportation diagram marks on the packaging box should comply with the provisions of Chapter 5 of JB/T6147. The packaging marks should not be blurred due to long time or rain erosion. 8.2
Product packaging should comply with the relevant provisions of JB/T6147. 8.3
Transportation and storage
The transportation and storage of the flaw detector should comply with the provisions of Chapter 6 of JB/T6147. 442
Additional Notes:
JB/T7411-94
This standard is proposed and managed by Changchun Testing Machine Research Institute. This standard is drafted by Changchun Testing Machine Research Institute. The main drafters of this standard are Zheng Jiqing, Xie Peicheng and Zhang Xiwang. 443A:
t--magnetization time, s;
T--working cycle, s.
JB/T7411-94
5.11.3 Use the Wheatstone bridge to measure the hot resistance R: of the power transformer and yoke coil of the flaw detector, and use formula 5 to calculate the hot temperature of the coil:
Where; t-hot temperature of the coil, ℃;
t}--temperature of the coil before the test, ℃;
R.--hot resistance of the coil.n
R,--resistance of the coil at t, a.
R=R(235+t)+t
5.11.4 Use a semiconductor thermometer to measure the surface temperature of the handle and yoke. 5.12 Temperature and humidity resistance
(5)
5.12.1 During the temperature test, the temperature in the high and low temperature boxes shall be kept constant and uniform, with a temperature difference of no more than ±2°C. The volume shall be at least three times that of the tested flaw detector. If necessary, measures that do not violate the purpose of the temperature test may be taken, such as sealing the high and low temperature boxes and injecting dry air, to prevent the influence of humidity.
5.12.2 Upper limit temperature test of the working range: Place the flaw detector in the high temperature box and put it in the power-off state. The temperature in the box rises to the value specified in Table 2. After the specified duration, the performance check is carried out. 5.12.3 Upper limit temperature test of extreme conditions: Put the power switch of the flaw detector in the on position. The temperature in the box rises to the value specified in Table 2. After the specified duration, the flaw detector is taken out of the box and restored to the working range conditions for 4 hours before the performance check is carried out. 5.12.4 Temperature test at the lower limit of the working range: Put the power-off flaw detector into the low temperature box, and the temperature inside the box drops to the value specified in Table 2. After the specified duration, perform a performance check.
5 Temperature test at the lower limit of the extreme conditions: The power switch of the flaw detector is in the on position, and the temperature inside the box drops to the value specified in Table 2. After the specified duration, the temperature inside the box rises to the lower limit of the working range at a rate of 0.5-1℃/min. Take out the flaw detector, and restore it under the working range conditions for 4 hours before performing a performance check. (After the low temperature test, if there is condensation on the flaw detector, the preheating time should be appropriately extended, or other methods such as fans should be used to quickly remove moisture before performing a performance check.) 5.12.6 The air in the wet box should be able to circulate evenly, and the volume should be at least 3 times that of the flaw detector, so as to ensure that the temperature change in the box is within ±2℃ and the humidity change is within ±3% within the specified time, and to prevent condensation from falling on the flaw detector. 5.12.7 If the flaw detector has components that are particularly sensitive to the influence of the mixing degree, it is allowed to be removed or replaced by other measures. 5.12.8 Humidity test of working range: Put the flaw detector into the high temperature box with the power switch in the on position, first raise the temperature to the value specified in Table 2, keep it for 1 hour, then start to input water vapor, and make the humidity in the box reach the value specified in Table 2 within 1 hour, and perform performance inspection after the specified duration.
8 Collision and drop test method
Perform in accordance with the provisions of Table 3.
5.14 The performance inspection items in the environmental tests of 5.12 and 5.13 should at least include the appearance quality, insulation resistance and withstand voltage of the flaw detector. Other performances shall be sampled by the quality inspection department as needed when necessary. 6 Inspection rules
6.1 Factory inspection
JB/T741194
1 Each flaw detector must be inspected and qualified by the manufacturer's quality department according to the requirements of the factory inspection items of this standard, and the product certificate must be issued before it can be produced6.1.1
: The measured data of the main items of the factory inspection should be recorded in the random documents. 6.1.2 The factory inspection items include Articles 4.6, 4.8~4.11 of this standard. 6.2 Type inspection
6.2.1 The following situations shall be subject to type inspection according to this standard: new product trial production or old product transfer production finalization identification; a.
When the product is officially produced, its structural design, materials, processes and key supporting components have major changes that may affect the normal production of the product, and regular or accumulated--After a certain amount of production, it should be inspected periodically (about 2 to 3 years); when the product is resumed after a long-term suspension of production; when the national quality supervision agency proposes a requirement for type inspection. Type inspection items include all technical requirements of this standard. 6.3 Judgment rules
6.3.1 For factory inspection, the qualified rate of all inspected items of each flaw detector must reach 100% to be qualified. 6.3.2
For type inspection, at least two units shall be sampled each time. After inspection, if one product fails, it shall be judged as unqualified. 7
Complete Set and Random Documents
The complete set of flaw detectors includes:
Flaw detector;
Magnetic yoke;
Fuse:
Necessary spare parts and tools.
The following documents are provided with the flaw detector:
Product instruction manual (the manual should indicate the standard code, serial number, year and name implemented, etc.); product export certificate;
Packing list.
Marking, packaging, transportation and storage
8.1 Marking
The flaw detector should have a nameplate, the contents of which include: 8.1.1
Name;
Model;
Manufacturer name;
Factory date:
Factory number
The shipping and receiving marks and storage and transportation diagram marks on the packaging box should comply with the provisions of Chapter 5 of JB/T6147. The packaging marks should not be blurred due to long time or rain erosion. 8.2
Product packaging should comply with the relevant provisions of JB/T6147. 8.3
Transportation and storage
The transportation and storage of the flaw detector should comply with the provisions of Chapter 6 of JB/T6147. 442
Additional Notes:
JB/T7411-94
This standard is proposed and managed by Changchun Testing Machine Research Institute. This standard is drafted by Changchun Testing Machine Research Institute. The main drafters of this standard are Zheng Jiqing, Xie Peicheng and Zhang Xiwang. 4438 Humidity test of working range: Put the flaw detector into a high temperature box with the power switch on. First, raise the temperature to the value specified in Table 2 and keep it for 1 hour. Then start to input water vapor and make the humidity in the box reach the value specified in Table 2 within 1 hour. After the specified duration, perform performance inspection.
8 Collision and drop test method
Perform according to the provisions of Table 3.
5.14 The performance inspection items in the environmental tests of 5.12 and 5.13 should at least include the appearance quality, insulation resistance and withstand voltage of the flaw detector. Other performances shall be sampled by the quality inspection department as needed when necessary. 6 Inspection rules
6.1 Factory inspection
JB/T741194
1 Each flaw detector must be inspected and qualified by the manufacturer's quality department according to the requirements of the factory inspection items of this standard, and the product certificate must be issued before it can be produced6.1.1
: The measured data of the main items of the factory inspection should be recorded in the random documents. 6.1.2 The factory inspection items include Articles 4.6, 4.8~4.11 of this standard. 6.2 Type inspection
6.2.1 The following situations shall be subject to type inspection according to this standard: new product trial production or old product transfer production finalization identification; a.
When the product is officially produced, its structural design, materials, processes and key supporting components have major changes that may affect the normal production of the product, and regular or accumulated--After a certain amount of production, it should be inspected periodically (about 2 to 3 years); when the product is resumed after a long-term suspension of production; when the national quality supervision agency proposes a requirement for type inspection. Type inspection items include all technical requirements of this standard. 6.3 Judgment rules
6.3.1 For factory inspection, the qualified rate of all inspected items of each flaw detector must reach 100% to be qualified. 6.3.2
For type inspection, at least two units shall be sampled each time. After inspection, if one product fails, it shall be judged as unqualified. 7
Complete Set and Random Documents
The complete set of flaw detectors includes:
Flaw detector;
Magnetic yoke;
Fuse:
Necessary spare parts and tools.
The following documents are provided with the flaw detector:
Product instruction manual (the manual should indicate the standard code, serial number, year and name implemented, etc.); product export certificate;
Packing list.
Marking, packaging, transportation and storage
8.1 Marking
The flaw detector should have a nameplate, the contents of which include: 8.1.1
Name;
Model;
Manufacturer name;
Factory date:
Factory number
The shipping and receiving marks and storage and transportation diagram marks on the packaging box should comply with the provisions of Chapter 5 of JB/T6147. The packaging marks should not be blurred due to long time or rain erosion. 8.2
Product packaging should comply with the relevant provisions of JB/T6147. 8.3
Transportation and storage
The transportation and storage of the flaw detector should comply with the provisions of Chapter 6 of JB/T6147. 442
Additional Notes:
JB/T7411-94
This standard is proposed and managed by Changchun Testing Machine Research Institute. This standard is drafted by Changchun Testing Machine Research Institute. The main drafters of this standard are Zheng Jiqing, Xie Peicheng and Zhang Xiwang. 4438 Humidity test of working range: Put the flaw detector into a high temperature box with the power switch on. First, raise the temperature to the value specified in Table 2 and keep it for 1 hour. Then start to input water vapor and make the humidity in the box reach the value specified in Table 2 within 1 hour. After the specified duration, perform performance inspection.
8 Collision and drop test method
Perform in accordance with the provisions of Table 3.
5.14 The performance inspection items in the environmental tests of 5.12 and 5.13 should at least include the appearance quality, insulation resistance and withstand voltage of the flaw detector. Other performances shall be sampled by the quality inspection department as needed when necessary. 6 Inspection rules
6.1 Factory inspection
JB/T741194
1 Each flaw detector must be inspected and qualified by the manufacturer's quality department according to the requirements of the factory inspection items of this standard, and the product certificate must be issued before it can be produced6.1.1
: The measured data of the main items of the factory inspection should be recorded in the random documents. 6.1.2 The factory inspection items include Articles 4.6, 4.8~4.11 of this standard. 6.2 Type inspection
6.2.1 The following situations shall be subject to type inspection according to this standard: new product trial production or old product transfer production finalization identification; a.
When the product is officially produced, its structural design, materials, process and key supporting components have major changes that may affect the product performance and normal production, and regular or accumulated--After a certain output, it should be inspected periodically (about 2 to 3 years); when the product is resumed after a long-term suspension of production; when the national quality supervision agency proposes a requirement for type inspection. Type inspection items include all technical requirements of this standard. 6.3 Judgment rules
6.3.1 For factory inspection, the qualified rate of all inspected items of each flaw detector must reach 100% to be qualified. 6.3.2
For type inspection, at least two units shall be sampled each time. After inspection, if one product fails, it shall be judged as unqualified. 7
Complete Set and Random Documents
The complete set of flaw detectors includes:
Flaw detector;
Magnetic yoke;
Fuse:
Necessary spare parts and tools.
The following documents are provided with the flaw detector:
Product instruction manual (the manual should indicate the standard code, serial number, year and name implemented, etc.); product export certificate;
Packing list.
Marking, packaging, transportation and storage
8.1 Marking
The flaw detector should have a nameplate, the contents of which include: 8.1.1
Name;
Model;
Manufacturer name;
Factory date:
Factory number
The shipping and receiving marks and storage and transportation diagram marks on the packaging box should comply with the provisions of Chapter 5 of JB/T6147. The packaging marks should not be blurred due to long time or rain erosion. 8.2
Product packaging should comply with the relevant provisions of JB/T6147. 8.3
Transportation and storage
The transportation and storage of the flaw detector should comply with the provisions of Chapter 6 of JB/T6147. 442
Additional Notes:
JB/T7411-94
This standard is proposed and managed by Changchun Testing Machine Research Institute. This standard is drafted by Changchun Testing Machine Research Institute. The main drafters of this standard are Zheng Jiqing, Xie Peicheng and Zhang Xiwang. 443
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