This standard is used when compiling environmental test method standards and related technical documents. GB/T 2422-1995 Terminology for environmental testing of electrical and electronic products GB/T2422-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Environmental testing for electric and electronic products
Environmental testing for electric and electronic productsTerms and definitions
GB/T 2422-1995
Replaces GB2422-81
This standard is equivalent to the international standard IEC68-5-2 "Environmental testing Part 5: Guidelines for the preparation of test methods - Terms and definitions" (first edition in 1990).
1 Subject content and applicable scope
This standard gives the terms and definitions used in the GB2423 "Environmental testing for electric and electronic products" series of standards. This standard is used when compiling environmental testing method standards and related technical documents. 2 General terms
2.1 Test
A complete sequence of environmental test operations, usually including: a.
Pre-conditioning (if necessary),
Initial test (if necessary);
Conditioning test;
Recovery;
Final test.
Note: Intermediate tests may be required during conditioning test and/or recovery. Pre-conditioning
Treatment of the test sample before conditioning test in order to eliminate or partially offset various effects previously experienced by the test sample. 2.3 Initial examination and measurement Inspection and measurement of the electrical properties, mechanical properties and appearance of the test sample after pre-conditioning and before conditioning test. 2.4 Conditioning
Exposure of the test sample to the test environment to determine the effect of such environmental conditions on the test sample. 2.5 Recovery
Treatment of the test sample after conditioning test and before final test to stabilize the performance of the test sample. 2.6 Final examination and measurement The examination and measurement of the electrical, mechanical and appearance of the test sample after recovery. 2.7 Specimen
The sample of the specified product to be subjected to environmental testing, including any auxiliary components and systems that make the product functionally complete, such as cooling, heating and mechanical shock absorbers (isolators).
2.8 Relevant specification A set of technical requirements to be met by a product or material and the test methods used to determine whether these requirements are met Approved by the State Administration of Technical Supervision on April 6, 1995, and implemented on January 1, 1996
2.9 Severity
GB/T 2422 -- 1995
A set of parameter values ​​used for conditional testing of test samples. 2.10 Combined test
A test in which two or more test environments act on the test sample at the same time. 2.11 Combination test Compasite test A test in which the test sample is exposed to two or more test environments in sequence. Note: (i) The time interval between each exposure may have a significant effect on the test sample and should be accurately specified. ② No pretreatment, recovery and stabilization are usually performed between each exposure. ③ Testing is usually carried out before the first exposure and after the last exposure. 2.12 Sequence of tests The order in which the test sample is exposed to two or more test environments in sequence. Note: (i) The time interval between each exposure may have a significant effect on the test sample and should be accurately specified. ② No pretreatment, recovery and stabilization are usually performed between each exposure. ③ Testing is usually carried out before and after each exposure, and the final test of the previous exposure is the initial test of the next exposure. 3 Reference atmosphere reference atmosphere 2.13Www.bzxZ.net
An atmosphere with a temperature of 20°C and a pressure of 101.3 kPa. 2.14 Referee measurement Repeated measurements made under precisely controlled atmospheric conditions when satisfactory results cannot be obtained within the recommended range of ambient atmospheric conditions and the correction factors for adjusting sensitive parameters of atmospheric conditions to the values ​​of standard base atmospheric parameters are unknown. 3 Shock, vibration and steady-state acceleration
3.1 Acceleration of gravity (g,) acceleration of gravity The standard acceleration caused by the earth's gravity, its value varies with altitude and the earth's latitude. Note: In environmental tests, its value is rounded to 10m/s2. 3.2 Critical frequencies The frequencies at which the performance of the test sample is abnormal or (and) deteriorated due to vibration; or mechanical resonance and (or) other response effects such as tremor are generated.
3.3 Crossover frequency
Crossover frequency
The frequency at which the characteristic quantity of vibration changes from one relationship to another. For example, the frequency at which the amplitude or root mean square value (rm.s) of the test changes from a constant displacement-frequency function relationship to a constant acceleration-frequency function relationship. 3.4 Damping
A common term to describe the mechanism of dissipation of large amounts of energy in a system. In practice, damping depends on many parameters such as the structural system, vibration mode, strain, force, velocity, material and interface slip. 3.4.1 Critical damping The minimum viscous damping required to return a displacement system to its starting position without oscillation. 3.4.2 Damping ratio
The ratio of the actual damping to the critical damping in a viscous damping system. 3.5 Distortion
【aot — α)
Distortion d -
X 100%
Where: a1 — RMS value of acceleration at the driving frequency; Total RMS value of applied acceleration (including α). a tot --
3.6 Fixing point
The part of the test sample that contacts the mounting fixture, vibration table or impact table surface, where the sample is fixed. 20
GB/T 2422---1995
Note: If part of the real mounting structure is used as a fixture, the fixing point is considered to be part of the mounting structure rather than part of the test sample. 3.7 Measuring point
A specific point where data for guiding the test can be obtained. It is divided into check point and reference point. Note: In order to evaluate the performance of the test sample, measurements can be made at certain points of the test sample, but these points cannot be regarded as measuring points. 3.7.1 Check point
The measuring point on the fixture, vibration table, impact table or test sample that is closest to the fixing point. In any case, the check point is rigidly connected to the fixture, vibration table or test sample. 3.7.2 reference point a point selected by the checkpoint whose signal is used to control the test to meet the requirements of the standard. 3.8 preferred testing axes three mutually perpendicular axes corresponding to the weakest axis of the test specimen. 3.9 sine beat
a single frequency continuous sine wave modulated by a lower frequency sine wave. The period of a sine beat is half the period of the modulating frequency. 3.10 modulating frequency modulating frequency the frequency of the test frequency.
3.11 test frequency test frequency
the frequency at which the test specimen is excited during the test. 3. 11.1 predetermined test frequency predetermined test frequency the vibration frequency specified in the relevant specification.
3.11.2 investigated test frequency the frequency to be tested on the test specimen obtained by investigating the vibration characteristics. 3.12 sweep cycle
traverses the specified frequency range once in each direction, such as 1 Hz-35 Hz-1 Hz. 3.13 Time-history
A record of acceleration, velocity or displacement as a function of time. Synthetized time-history 3.14
A time-history of a response spectrum generated by artificial simulation and with the required response spectrum envelope. 3.15 strong part of the time-history the part of the time-history from the time when the curve first reaches 25% of the maximum value to the time when it last drops to 25%. 3.16 oscillator
a single-degree-of-freedom system used to generate or maintain mechanical vibration. 3.17 response spectrum
a family of maximum response curves of a single-degree-of-freedom system with a specified damping ratio under a given input excitation. 3.18 test response spectrum the response spectrum obtained from the actual motion of the vibration table table by analytical methods or spectrum analysis equipment. 3.19 zero period acceleration the high-frequency asymptotic value of the acceleration of the response spectrum. Note: Since zero period acceleration represents the maximum peak value of acceleration, it has practical significance. 3.20 high stress cycles the response cycle that causes the test specimen to produce fatigue stress values. 3.21
vibration period
the shortest time interval in which the same value of the same physical quantity is repeated in periodic vibration. 3.22 Vibration frequency vibration frequency21
GB/T 2422-1995
In periodic vibration, the number of times the same vibration value recurs per unit time. 3.23 Angular frequency (circular frequency) angular frequency (circular frequency) The number of radians per unit time, equal to the frequency multiplied by 2 yuan. 3.24 Displacement amplitude displacement amplitude The maximum displacement in sinusoidal vibration.
5 Velocity amplitude velocity amplitude
The maximum velocity in sinusoidal vibration.
Velocity amplitude acceleration amplitude The maximum acceleration in sinusoidal vibration.
Compound vibration complexvibration
Vibration synthesized by simple harmonic vibrations of different frequencies. 3.28 Mean-squared acceleration mean-squared acceleration The squared mean value of the acceleration variable X(t) in a given time interval T. It is expressed by the following formula: X2(t)da
Root-mean-sguared acceleration
root-mean-sguared acceleration The root-mean-square value of the acceleration variable X(t) within a given time interval T. It is expressed by the following formula: 1
X(t)da
3.30Thrust
The maximum value of the power generated by the vibration table or exciter. 3.31 Maximum bare table acceleration The maximum acceleration value that can be reached at the center of the table when the vibration table is unloaded. Maximum full load acceleration3.32
The maximum acceleration value that can be reached at the center of the table when the vibration table is fully loaded. 3 Amplitude nonuniformity of displacement of the table3.33
Parameter that describes the nonuniformity of the displacement amplitude of each point on the vibration table surface. Calculate as follows: [AAmaxl
X 100%
Where: A—the displacement amplitude of the center point in the same measurement; 1AAmx1—the absolute value of the maximum deviation of the displacement amplitude of the center point to the displacement amplitude of each point in the same measurement. 3.34Amplitude nonuniformity of acceleration of the tableA parameter that describes the nonuniformity of the acceleration amplitude of each point on the vibration table surface. Calculate as follows: [Aamaxl × 100%
Where: a—
the acceleration amplitude of the center point in the same measurement; 1△amax1—the absolute value of the maximum deviation of the acceleration amplitude of the center point to the acceleration amplitude of each point in the same measurement. Transverse vibration3.35
Vibration perpendicular to the main vibration direction, expressed as a percentage. 3.36 Piezoelectric acceleration pickup A sensor that uses the piezoelectric effect to make the output power and the acceleration it bears have a certain single value relationship. Sensor voltage sensitivity of pickup 3.37
The voltage output of the sensor after the unit mechanical quantity is applied. 22
GB/T2422—1995
3.38 Charge sensitivity of pickup The charge output of the sensor after the unit mechanical quantity is applied. 3.39 Test value test level
The maximum peak value of the test wave.
4 Climate test
4.1 Free air condition Conditions in an infinite space, in which the movement of air is only affected by the heat dissipation test sample itself, and the energy radiated by the test sample is completely absorbed by the surrounding air.
Note: In theory, this definition cannot be used for test samples heated by direct radiation, but in fact it can also be used for the occasions of test samples heated by direct radiation. Heat-dissipating specimen4.2
The difference between the hottest temperature on the surface and the ambient temperature measured after the temperature stabilizes is greater than 5°C under the conditions of free air and the atmospheric pressure (86~106kPa) specified in the standard atmospheric conditions for the test. 4.3 Non-heat-dissipating specimenThe difference between the hottest temperature on the surface and the ambient temperature measured after the temperature stabilizes is less than 5°C under the conditions of free air and the atmospheric pressure (86~106kPa) specified in the standard atmospheric conditions for the test. 4.4 Ambient temperatureambienttemperature4.4.1 Ambient temperature of non-heat-dissipating specimensambient temperature of non-heat-dissipating specimensThe temperature of the air around the non-heat-dissipating specimens. Ambient temperature of heat-dissipating specimensambient temperature of heat-dissipating specimens4.4.2
The temperature of the air around the heat-dissipating specimen where its heat dissipation effect can be ignored under the conditions of free air. Note: In fact, the ambient temperature is the average temperature of the temperature at 1m from the test sample on a horizontal plane 050mm below the test sample or at half the distance between the test sample and the inner wall of the test box (room) (whichever is smaller). Surface temperature (shell temperature) surfacetemperature (casetemperature) 4.5
The temperature measured at a specified point (one or more) on the surface of the test sample. 4.6 Chamber
It refers to a closed body or space, a part of which can reach the specified test conditions. 4.7 Working space
The part of the space in the test box (room) that can maintain the specified test conditions within the specified tolerance range. 4.8
Temperature stability temperaturestability The state when the difference between the temperature of each part of the test sample and its final temperature is within 3℃ (or other values ​​specified in relevant specifications). Note: The final temperature of the non-heat dissipation test sample is the average temperature of the test box where the test sample is placed at that time. The final temperature of the heat dissipation test sample needs to be repeatedly measured to determine the time interval for the temperature change of 3°C (or other values ​​specified in relevant specifications). When the ratio of two adjacent time intervals is greater than 1.7, it is considered that the temperature has reached a stable state. ② When the thermal time constant of the test sample is less than the duration of exposure at a given temperature, no measurement is required. When the thermal time constant of the test sample is the same as the exposure duration, an inspection should be carried out to determine a) whether the non-heat dissipation test sample is within the average temperature range of the placed test sample, and b) for the heat dissipation test sample, repeatedly measure the time interval for the temperature change of 3°C (or other values ​​specified in relevant specifications) to determine whether the ratio of two adjacent time intervals is greater than 1.7. ③ In practice, it may not be possible to measure the internal temperature of the test sample directly. In this case, some other parameters that have a known functional relationship with the temperature can be measured for inspection.
4.9 Condensation
When the surface temperature of the test sample is lower than the dew point temperature of the surrounding air, water vapor precipitates on the surface, that is, water changes from vapor to aggregated liquid.
4.10 Adsorption
GB/T 2422---1995
When the surface temperature of the test sample is higher than the dew point temperature of the air, water vapor molecules adhere to the surface of the test sample. 4.11 Absorption
Aggregation of water molecules in the material.
4.12 Diffusion
The phenomenon of water molecules migrating through the material caused by partial pressure difference Note: Diffusion leads to partial pressure balance, and flow (such as viscous flow or laminar flow formed when water molecules pass through a sufficiently large gap) eventually leads to total pressure balance. 4.13 breathing
The exchange phenomenon between the air inside the cavity and the air outside the cavity caused by temperature changes. 5 Sealing test
5.1 Leak rateleak rate
The amount of dry gas with known temperature leaking per unit time when the pressure difference on both sides of the leak is known. Note: The basic SI unit of leak rate is \Pa·m\/s", in fact, the use of its derived units "bar·cm\/s" and \Pa·cm/s" is more consistent with the commonly used magnitude in industry, and the conversion relationship is: 1 Pa·m\/s=106Pa-cm\/s-10 bar-cm\/s5.2 Standard leak ratestandard leakrateThe leak rate at standard temperature and standard pressure difference. Note: For environmental testing, the standard temperature is 25℃C and the standard pressure difference is 105Pa (1bar). 5.3 Measured leak rate (R) measured leak rate (R) The leak rate of a given test sample measured under specified conditions using a specified test gas. Note: ①) Nitrogen is usually used as the test gas and the measured leak rate is determined at 25°C and a pressure difference of 10\Pa (1bar). ② In order to compare with the leak rate determined by other test methods, the measured leak rate must be converted into an equivalent standard leak rate. 5.4 Equivalent standard leak rate (L) equivalent standard leak rate (1) The standard leak rate of a given test sample when air is used as the test gas. (Leakage) time constant (9) time constant (of leakage) (0) 5.5
The time required for the partial pressure difference on both sides of the leak to reach equilibrium, assuming that the initial rate of change of the pressure difference remains unchanged. Note: For environmental tests, the time constant is equal to the quotient of the internal cavity volume of the test sample and the equivalent standard leak rate. 5.6 gross leak
The equivalent standard leak rate is greater than 1Pa*cm\/s (10-5bar·cm2/s). 5.7
Fine leak
Equivalent standard leak rate is less than 1Pa·cm\/s (10-5bar·cm/s). 5.8Virtual leak
A phenomenon similar to leakage caused by the slow release of gas absorbed, adsorbed or trapped by the test sample. 6 Solderability test
6.1Colony
The residue after extracting turpentine from the oleoresin of pine, mainly composed of rosin acid and similar resin acids, and also includes a small amount of resin acid esters.
Note: Resin is a synonym for rosin. Since it is confused with the commonly used chemical term "resin", it is not recommended to use it. 6.2Contact angle
Usually refers to the angle between the section of the liquid surface and the section of the liquid/solid interface at the intersection of the liquid surface and the solid surface (Figure 1). It especially refers to the contact angle when liquid solder contacts the solid metal surface. 21
6.3 Wetting
The formation of a solder adhesion layer on the surface.
Note: A small contact angle is a characteristic of good wetting. 6.4 Non-wetting
GB/T 2422-1995
Contact angle
No solder adhesion layer can be formed on the surface. In this case, the contact angle is much greater than 90°. 6.5 De-wetting
The molten solder retracts from the solid surface area that was initially wetted, and the contact angle increases (in some cases, a very thin tin film may still remain).
6.6 Solderability
The property that a surface is easily wetted by molten solder. Soldering time
The time required to wet a specified surface under specified conditions. Resistance to soldering heat6.8
The ability of the test sample to withstand the thermal stress generated by soldering. 25
Standard leak rate,
Surface temperature (shell temperature)
Non-wetting
Measuring point
Measured leak rate (R)
Initial detection·
Sensor charge sensitivity
Sensor voltage sensitivity
Equivalent standard leak rate (L)
Root mean square acceleration
Mean square acceleration
Non-heat dissipation test sample
Ambient temperature of non-heat dissipation test sample
Compound vibration
High stress cycle
Working space·
Fixed point
Welding time··
Synthetic time history
Transverse vibration
Ambient temperature
Recovery·
GB/T 2422--1995
Appendix A
Chinese index
(reference)
reference atmosphere
reference point·
acceleration amplitude
check point
crossover frequency·
angular frequency
contact angle
weldability
maximum acceleration without load
critical cheek rate.|| tt||Critical damping
Zero cycle acceleration
(Condensation) time constant (9)
Maximum acceleration at full load
Welding heat resistance
Wet wetting·
Heat dissipation test sample
Ambient temperature of heat dissipation test sample·
Frequency sweep cycle
Distortion
Co+++++9o0 6. 3
Time history
Main parts of the time history
Test quantity
Test frequency
Test sequence
Test chamber (room)
Test response spectrum
Test sample…·
Velocity amplitude
Uniformity of table acceleration amplitude
Uniformity of table displacement amplitude
Conditional test
Modulation frequency
Displacement amplitude
Temperature stability
absorption
acceleration amplitude
acceleration of gravity
adsorption
中服中华
|ambient temperature
+++e100.*
GB/T 2422-
Fine·
Related specifications…·
Response spectrum
Piezoelectric accelerometer
Severity level·
Research test frequency
Priority test axis
Pretreatment
Predetermined test frequency
Vibration frequency
Vibrator
Vibration period
Sine beat type·
Gravity acceleration (g.）
Arbitration measurement
Free air condition,
Comprehensive test
Damping ratio
Combined test
Final test
English index
(reference)
ambient temperature of heat-dissipating specimensambient temperature of non-heat-dissipating specimensamplitude nonuniformity of acceleration of the tableamplitude nonuniformity of displacement of the tableangular frequency(circular frequency) ...o心心
业受食业电国争中
breathint
chamber
charge sensitivity of pickupcheck point
colophony
combined test
complex vibration
composite test
condensation
conditioning
contact angle
critical damping
critical frequencies
crossover frequency
damping
danping ratio
de-wetting
diffusion
electricity
displacement amplitude
distortion
equivalent standard leak rate(L)final examination and measurementfine leak
fixing point
free'air condition
grass leak
heat-dissipating specimen
high stress cycles
GB/T 2422-1995
industry professional
measurement
industry professional
electricity
initial examination and measurementinvestigated test frequency
leak rate | | tt | axes | beat
Volume industry
GB/T 2422--1995 | --
synthetized time history
temperature stability
test frequency
test level
learn more single more classic science
test response spectrum
thrust ........
time constant(of leakage)(0)time-history
transverse vibration
velocity amplitude
vibration frequeney
vibration period
virtual leak
voltage sensitivity of pickupw
wetting
working space
zero period acceleration
Additional remarks:
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. 中心中心#中心#中##中心o
This standard is under the jurisdiction of the National Technical Committee for Standardization of Environmental Conditions and Environmental Tests for Electrical and Electronic Products. This standard was drafted by the Guangzhou Electric Science Research Institute of the Ministry of Machinery, the Standardization Institute of the Ministry of Electronics, and the Fifth Research Institute of the Ministry of Electronics. The main drafters of this standard are Xie Jianhua, Zhou Xincai, and Fu Wenru. 30oxinxin
The industry is affected by the food industry and the country is competing for electricity
breathint
chamber
charge sensitivity of pickupcheck point
colophony
combined test
complex vibration
composite test
condensation
conditioning
contact angle
critical damping
critical frequencies
crossover frequency
damping
danping ratio
de-wetting
diffusion| |tt||Diandian Electric Industry
displacement amplitude
distortion
equivalent standard leak rate(L)final examination and measurementfine leak
fixing point
free'air condition
grass leak
heat-dissipating specimen
high stress cycles
GB/T 2422-1995
Professional
Professional Measurement industry
industry professional
electric quantity
initial examination and measurementinvestigated test frequency
leak rate
maximum bare table accelerationmaximum full load accelerationmean-squared acceleration
measured leak rate(R) ..........measuring point
modulating frequency
non-heat-dissipating specimennon-wetting||tt ||oscillator
piezoelectric acceleration pickuppre-conditioning
predetermined test frequencypreferred testing axes
recovery .
referee measurement
reference atmosphere
reference point
relevant specification
resistance to soldering heatresponse spectrum .......||tt| |root-mean-squared accelerationsequence of test:
severity
sine beat
Volume industry
GB/T 2422-—1995
professional specialist camp
solderability
soldering time
specimen
standard leak rate
strong part of the time-history center blood heart
GB/T 2422--1995
surface temperature(case temperature) .-sweep cycle --
synthetized time history
temperature stability
test frequency
test level
learn more
test response spectrum
thrust ... .....
time constant(of leakage)(0)time-history
transverse vibration
velocity amplitude
vibration frequency
vibration period
virtual leak
voltage sensitivity of pickupw
wetting
working space
zero period acceleration
Additional remarks:
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Environmental Conditions and Environmental Testing for Electrical and Electronic Products. This standard was drafted by the Guangzhou Electric Science Research Institute of the Ministry of Machinery, the Standardization Institute of the Ministry of Electronics, and the Fifth Research Institute of the Ministry of Electronics. The main drafters of this standard are Xie Jianhua, Zhou Xincai, and Fu Wenru.oxinxin
The industry is affected by the food industry and the country is competing for electricity
breathint
chamber
charge sensitivity of pickupcheck point
colophony
combined test
complex vibration
composite test
condensation
conditioning
contact angle
critical damping
critical frequencies
crossover frequency
damping
danping ratio
de-wetting
diffusion| |tt||Diandian Electric Industry
displacement amplitude
distortion
equivalent standard leak rate(L)final examination and measurementfine leak
fixing point
free'air condition
grass leak
heat-dissipating specimen
high stress cycles
GB/T 2422-1995
Professional
Professional Measurement industry
industry professional
electric quantity
initial examination and measurementinvestigated test frequency
leak rate
maximum bare table accelerationmaximum full load accelerationmean-squared acceleration
measured leak rate(R) ..........measuring point
modulating frequency
non-heat-dissipating specimennon-wetting||tt ||oscillator
piezoelectric acceleration pickuppre-conditioning
predetermined test frequencypreferred testing axes
recovery .
referee measurement
reference atmosphere
reference point
relevant specification
resistance to soldering heatresponse spectrum .......||tt| |root-mean-squared accelerationsequence of test:
severity
sine beat
Volume industry
GB/T 2422-—1995
professional specialist camp
solderability
soldering time
specimen
standard leak rate
strong part of the time-history center blood heart
GB/T 2422--1995
surface temperature(case temperature) .-sweep cycle --
synthetized time history
temperature stability
test frequency
test level
learn more
test response spectrum
thrust ... .....
time constant(of leakage)(0)time-history
transverse vibration
velocity amplitude
vibration frequency
vibration period
virtual leak
voltage sensitivity of pickupw
wetting
working space
zero period acceleration
Additional remarks:
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Environmental Conditions and Environmental Testing for Electrical and Electronic Products. This standard was drafted by the Guangzhou Electric Science Research Institute of the Ministry of Machinery, the Standardization Institute of the Ministry of Electronics, and the Fifth Research Institute of the Ministry of Electronics. The main drafters of this standard are Xie Jianhua, Zhou Xincai, and Fu Wenru.
referee measurement
reference atmosphere
reference point
relevant specification
resistance to soldering heatresponse spectrum .......
root-mean-squared accelerationsequence of test:
severity
sine beat
Volume industry
GB/T 2422-—1995
professional specialist camp
solderability
soldering time
specimen
standard leak rate
strong part of the time-history center blood heart
GB/T 2422--1995
surface temperature(case temperature) .-sweep cycle --
synthetized time history
temperature stability
test frequency
test level
learn more
test response spectrum
thrust ... .....
time constant(of leakage)(0)time-history
transverse vibration
velocity amplitude
vibration frequency
vibration period
virtual leak
voltage sensitivity of pickupw
wetting
working space
zero period acceleration
Additional remarks:
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Environmental Conditions and Environmental Testing for Electrical and Electronic Products. This standard was drafted by the Guangzhou Electric Science Research Institute of the Ministry of Machinery, the Standardization Institute of the Ministry of Electronics, and the Fifth Research Institute of the Ministry of Electronics. The main drafters of this standard are Xie Jianhua, Zhou Xincai, and Fu Wenru.
referee measurement
reference atmosphere
reference point
relevant specification
resistance to soldering heatresponse spectrum .......
root-mean-squared accelerationsequence of test:
severity
sine beat
Volume industry
GB/T 2422-—1995
professional specialist camp
solderability
soldering time
specimen
standard leak rate
strong part of the time-history center blood heart
GB/T 2422--1995
surface temperature(case temperature) .-sweep cycle --
synthetized time history
temperature stability
test frequency
test level
learn more
test response spectrum
thrust ... .....
time constant(of leakage)(0)time-history
transverse vibration
velocity amplitude
vibration frequency
vibration period
virtual leak
voltage sensitivity of pickupw
wetting
working space
zero period acceleration
Additional remarks:
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Environmental Conditions and Environmental Testing for Electrical and Electronic Products. This standard was drafted by the Guangzhou Electric Science Research Institute of the Ministry of Machinery, the Standardization Institute of the Ministry of Electronics, and the Fifth Research Institute of the Ministry of Electronics. The main drafters of this standard are Xie Jianhua, Zhou Xincai, and Fu Wenru.
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