GB/T 4798.1-1986 Storage of application environment conditions for electrical and electronic products
Some standard content:
Scope of application
National Standard of the People's Republic of China
Environmental conditions existing in theapplication of electric and electronic productsStorage
UDC 621.3:658.78
GB4798.1--86
1.1This standard applies to electrical and electronic products in storage (hereinafter referred to as "products"). Products can be stored with packaging. Note: Storage refers to storage in typical warehouses such as industrial warehouses and retail commercial warehouses. The types of warehouses include finished product warehouses, semi-finished product warehouses, component warehouses, transit warehouses, etc. The building conditions of warehouses include general warehouses with or without air conditioning, warehouses with room structure, shed warehouses, cave warehouses, basement warehouses and open-air warehouses. 1.2This standard specifies the environmental conditions and severity levels of storage places and products during storage that directly affect the product structure, appearance or basic performance. It does not include the environment caused by fire, explosion, nuclear radiation and other accidents. It also does not include the microclimate conditions inside the product and packaging box and the transportation conditions during storage. Note: In some special cases, the possibility of accidents should be considered. 2
Terms
The following terms supplement the terms in GB4796-84 "Classification of environmental parameters for electrical and electronic products and their severity classification". 2.1 Storage
storage
The product is placed in a certain place for a long time and is not used during this period. 2.2 Weather-protected location
Weather-protected location
This place has protective facilities to prevent the direct impact of climate, and can be divided into: 2.2.1 Totally weather-protected location
Totally weather-protected location The protective facilities of this place can completely exclude the direct impact of climate. 2.2.2 Partially weather-protected location
Partially weather-protected location, the protective facilities of this place can only prevent the direct impact of some climate, and there are additional impacts such as rain, snow, and fire from wind. 2.3 Non-weather-protected location This location has no protective facilities and cannot prevent the direct impact of the climate. 3 General requirements 3.1 This standard is used together with GB4798.10--84 "Introduction to Environmental Conditions for Application of Electrical and Electronic Products". 3.2 The environmental condition levels of this standard can meet the needs of the application scope in my country. When adopting this standard, the lowest level that can meet the storage conditions should be selected.
Issued by the National Bureau of Standards on November 22, 1986
Implemented on October 1, 1987
GB 4798.1-86
3.3 It is unlikely to exceed the severity of each level in this standard, because these values are maximum values or limit values, which may be reached but will not appear for a long time.
3.4 According to the conditions of each region, the time period and frequency of the occurrence of various environmental parameters can be supplemented when necessary. 3.5 It should be considered that the combined effect of more than two environmental parameters will increase the impact on the product, especially when high relative humidity and biological environmental conditions, chemical or mechanical active substance conditions are combined. 3.6 The impact of other factors (such as heat sources, special production processes, etc.) on the storage environment and products in certain places should be considered.
3.7 If the environmental condition levels specified in this standard cannot meet the extreme and special environments, the storage environmental conditions of the product can be determined by the manufacturer and the user through consultation.
4 Classification of environmental conditions and their severity levels 4.1 Storage environmental conditions include: climatic environmental conditions-K; special climatic environmental conditions-Z, biological environmental conditions = B, chemical active substance conditions-C, mechanical active substance conditions-S, mechanical environmental conditions-M. 4.2 The severity levels specified for storage environmental conditions are shown in Table 1. The levels marked with larger numbers in Table 1 usually include the levels marked with smaller numbers (except for individual cases).
Table 1 Storage environment condition level table
Environmental conditions
Special climate
a. Thermal radiation
b. Circumferential air movement
c. Water other than rainfall
Chemically active substances
Mechanically active substances
1K1, 1K2, 1K3, 1K3L, 1K4, 1K4L, 1K5, 1K6, 1K7, 1K8, 1KgL1Z1,122
1Z3，124
1Z5，126
1B1，1B2，1B3
1C1, 1C2, 1C3
1S1, 1S2, 1S3, 1S4
1M1,1M2,1M3,1M4
Note: The letter L added after the level indicates that the severity of some parameters is lower than the original level. 4.3 The environmental condition levels specified in this standard (such as 1KX, 1ZX, 1BX, etc.) are selected from the corresponding partial levels in the ground fixed use environmental condition standards. When determining the storage environmental conditions of professional products, the appropriate level should be selected from Table 1 of this standard. The environmental parameter values of each level in Table 1 are listed in Tables 2 to 7. Environmental conditions can be combined according to the storage location of electrical and electronic products to indicate the storage conditions formed by factors such as outdoor climate in various places. 4.4
It is not possible to specify quantitative severity levels for some environmental parameters (such as biological conditions, etc.). This standard only provides qualitative regulations. 4.5 For certain storage places or products, the levels of all storage environmental conditions should be indicated. For example: 1K1/1Z1/1B1/1C2/1S1/1M3.
4.6 Climate and Environmental Conditions - K
4.6.1 The climate conditions of the environmental conditions for the storage of electrical products are classified from 1K1 to 1K9L. These include 1K3L and 1K4L643
GB4798.186
two derived levels, totaling 11 levels. The conditions of these levels take into account outdoor climate factors, building structure, temperature and humidity control system and indoor conditions (such as heat dissipation of equipment and people, etc.). Climate conditions include all normal conditions, but do not include unexpected events. 4.6.2 When selecting the climate and environmental conditions level for a climate-protected place, indoor conditions should be considered in relation to outdoor climate factors (especially air temperature and solar radiation) and building structure. Walls with good insulation or large heat capacity can significantly smooth the peak of the daily temperature difference (except if the effect time is long). Walls with poor insulation or small heat capacity do not have this effect, and the peak value will be increased due to solar radiation during the day and heat dissipation of the building at night. The impact of solar radiation will also be increased due to heat absorption or greenhouse effect. 4.6.3 The special climatic conditions (Z) in places without climate protection have a significant impact on the product and its main components. Pay more attention to factors such as temperature changes, heat radiation, precipitation, cold wind, etc. 4.6.4 The severity of the above effects will be affected by the structure and materials of the building (type of materials, thickness and surface color of the exterior wall, sealing of the housing shell, etc.) and storage conditions (storage location and selected wind and weather protection measures). 4.6.5 The levels of climatic environmental conditions are shown in Table 2. In the table, (3K1), (3K3), .. (4K3) are equivalent to the levels of "ground fixed use environmental conditions".
Table 2 Level of climate environment conditions
Environmental parameters
c. Low relative
humidity?
d. High relative
humidity?
e. Low absolute
f. High absolute
g. Temperature change rate4
h. Low air pressure
iHigh air pressure
℃/min
j. Solar radiation W/m2
k Thermal radiation
1 Movement of surrounding air
?
(3K5)(3K5L)
See Table 3
See Table 3
See Table 3
(3K6L)
(3K8)
See Table 3
See Table 3
+70②
See Table 3
See Table 3
See Table 3
See Table 3
See Table 3
See Table 3
See Table 3
See Table 3
Environmental parameters
n. Precipitation conditions (rain,
snow,
o.Rainfall intensity
mm/min
P. Rainwater temperature
degree (low)
q. Water outside rainfall
r. Ice and
Frost
GB 4798.1-86
Continued Table 2
See Table 3／
See Table 3
(3K6)[(3K6L)
See Table 3
Note: ① For places with air conditioning, the temperature deviation is ±2℃ of the specified value. With
See Table 3
See Table 3
See Table 3
See Table 3See Table 3
② When there is no direct sunlight or the solar radiation will not cause warming due to structural reasons of the building, +40℃ is used. iK8
（4K3）
（4K2）
See Table 3
③Relative humidity is limited by absolute humidity, so environmental parameters a and c, b and d will not appear at the same time in the severity level specified in this table. ④The temperature change rate is the average value of 5 minutes. ③70kPa is approximately equivalent to 3000m above sea level. This air pressure value may also appear in some areas above 3000m. ③Excluding the conditions of mine merging.
See Table 3
②Under special circumstances, the values in K1~1K6 can be selected from Table 3. The cooling system without auxiliary convection may be disturbed by the reverse air movement around.
③The precipitation conditions of 1K 4~1K6 are caused by rain, snow and mulch blown by wind. Rainwater temperature (low) refers to low rain temperature, which should be considered together with environmental parameters b and j. The cooling effect of rainwater should be considered in conjunction with the surface temperature of the product.
4.7 Special climatic environmental conditions-Z
4.7.1 Thermal radiation, ambient air movement and water other than rainfall, these three parameters will appear in combination with other climatic conditions, sometimes aggravating the impact on the product, so overly harsh environmental parameter levels should not be selected to avoid waste in product design. 645
GB 4798.1--86
4.7.2 The levels of special climatic environmental conditions are shown in Table 3. (3Z1), ....·(4Z7) in the table are equivalent to the levels of Ding "Environmental Conditions for Ground Fixed Use".
Environmental parameters
k. Thermal radiation
i. Ambient air movement*
Name. Water other than rainfall
4.8 Biological environmental conditions-B
Special climatic environmental conditions levels
(3Z1, 4Z1)
(3Z6, 4Z4)
(3Z9, 427)
Special conditions
Negligible
There are thermal radiation conditions, such as
Near indoor heating systems
Dripping conditions
·Splashing conditions
4.8.1 Biological environmental conditions do not make quantitative regulations on severity. Table 4 proposes typical environmental parameter classifications, among which (3B1) and (4B2) are equivalent to the levels of "Environmental conditions for ground fixed use"4.8.2
Environmental parameters
Negligible
Negligible
Biological environmental condition level
(3B2, 4B1)
Presence of mold, fungi, etc.
Presence of rodents and other animals that endanger
products, except termites
(3B3, 4B2)
Presence of fungi, fungi, etc.
Presence of rodents and other animals that endanger
products: including termites
4.9 Chemically active substances condition C
4.9.1 Pollutants in the natural atmosphere mainly come from the diffusion of chemical substances in industrial production, motor vehicles and heating systems, and other effects include salt spray. Pollutants can affect the performance and materials of electrical and electronic products. * Cooling systems without auxiliary convection may be disturbed by the reverse air movement around them. 616
GB4798.1-86bzxz.net
4.9.2 This standard specifies the maximum and average values of chemically active substances. The maximum value has a high concentration and will cause irreversible and significant damage when it directly acts on the material in a short period of time. The average value is also important because it has a long-term impact on the internal structure of the product. 4.9.3 The pollutants (parameters) in each level of this standard do not appear at the same time. Even if chemical pollutants appear at the same time, the possibility of their concentrations increasing uniformly is small. According to local conditions, only one pollutant often appears at a high value. Therefore, for the 1C1 level in rural areas or with less industrial production activities and the 1C2 level in cities, it is required to consider the comprehensive effects of the existence of various pollutants. For the 1C3 level, the existence of various pollutants cannot be considered at the same time, so as to avoid an overly safe design that makes the product uneconomical. For this level, only one chemical pollutant related to the on-site situation can be selected, and the other parameters can be based on the severity in 1C2. Note: Chemically active liquids and solids (except salt spray) are not considered in this standard for the time being. 4.9.4 Table 5 lists the levels of chemically active substance conditions. In the table, (3C1, 4C1)** are equivalent to the level of "ground fixed use environment conditions".
4.10 Mechanically active substance conditions - S
4.10.1 Since the effects of mechanically active substances sand and dust on the product are similar, they are placed in the same category Mechanically active substance condition levels are shown in Table 6. In the table, (3S1) and (4S3) are equivalent to the level of "ground fixed use environment conditions".
Table 5 Chemically active substance condition levels
Environmental parameters
a. Salt spray③
b. Sulfur dioxide
c. Hydrogen sulfide
e. Nitride
f. Ammonium fluoride
cm3/m3
cm2/m3
cm3/m3
cm3/m3
mg/m3
cma/m3
mg/m 3
cm3/m3
(3Ci, 4C1）
Maximum value②
(3C2, 4C2)
Long average?
Maximum value
(3C3, 4C3）
Average value
Maximum value
Environmental parameters
i. Building nitrogen @
cm*/m3
cma/m3
GB 4798.1--86
Continued Table 5
(3C1.4C1)
Maximum value②
(3C2.4C2）
Average value②
Maximum value
(3C3, 4C3）
Average value
Maximum value
Note: 1C3 does not require the comprehensive effect of all parameters to be considered. The level of a single parameter can be selected according to the specific situation. In this case, the remaining parameter values should be based on 1C2.
②The average value is the average value of the long-term value; the maximum value is the limit value or peak value that does not exceed 30 minutes per day. ③Only sea salt and road salt are considered, and no qualitative regulations are made. ④Salt spray may still occur in sheltered offshore locations. ?The values in cm\/m\ are obtained by converting the values in mg/m3 under standard atmospheric conditions of 20°C and 101.3 kPa. ?Equivalent to the values of nitrogen dioxide.
Table 6 Mechanically active substances condition levels
Environmental parameters
b. Dust (particles)
c. Dust (sedimentation)
Note: The unit mg/m2.d (d stands for days) is usually specified as the unit for formal measurement of dust pollution. 4.11 Mechanical environmental conditions~M
4.11.1 This standard specifies sinusoidal vibration conditions in the high-frequency and low-frequency ranges with severity levels of acceleration and displacement, respectively. Random vibration is not considered in vibration conditions, but it may be included if sufficient information is available. 4.11.2 This standard specifies the classification of non-steady-state vibrations including shocks using the first-level undamped maximum impact response spectrum. See GB4796--84, Section 5.3.1.
4.11.3 Mechanical environmental condition levels are shown in Table 7. (3M1, 4M1) in the table are equivalent to the levels of "ground fixed use environmental conditions" (static load conditions are conditions added by this standard). Typical impact response spectrum is shown in the figure on the next page. 648
Environmental parameters
a. Sinusoidal steady-state vibration
Acceleration
Frequency range (
b. Non-steady-state vibration
Including shock
Shock response spectrum L()*
Shock response spectrum 1(?)*
Shock response spectrum a)*
c, static load
GB 4798.1-86
tables the mechanical environmental condition levels
(3M1, 4M1)
9～200
(3M2, 4M2)
9～200
(3M4, 4M4)
typical shock response spectrum (first level maximum shock response frequency harmonic) diagram spectrum type L - duration is 22ms
spectrum type I - duration is 11ms,
spectrum type - duration is 6 ms
, see the typical sweep response spectrum diagram (first level maximum shock response frequency harmonic), and refer to GB4796-84 Section 5.3.1. IM4
(3M6, 4M6)
A.1 Overview
GB 4798.1--86
Appendix A
Summary of conditions included in each level
(reference)
This appendix includes a summary of the various conditions involved in each level. A.2 Description of various environmental condition levels
A.2.1 Description of eleven levels of climatic environmental conditions are as follows: 8.1K1 (equivalent to 3K1): This level is to ensure the storage requirements of high-precision and high-sensitivity electronic products, and is suitable for fully air-conditioned closed places. Some warehouses storing precision instruments and electronic components belong to this level. The stored products may be affected by the scattering of solar radiation and the air movement caused by the air blowing of the air conditioning system, but will not be affected by heat radiation, condensation, precipitation (rain, snow,) and water other than rainfall (dripping, splashing), ice and other conditions. b. 1K2 (equivalent to 3K3): This level includes the conditions of 1K1 and is suitable for electrical products that require relatively good storage conditions. In order to ensure the required storage conditions, when the temperature difference between the closed indoor and outdoor is too large or the conditions do not meet the requirements, cooling or heating measures can be taken to control the temperature conditions (without controlling the humidity). The environment will be affected by the sunlight radiation entering through the glass windows and the air flow caused by opening the windows or special reasons. However, there is no influence of environmental factors such as condensation, precipitation, water other than precipitation, and ice. This storage condition is suitable for products, semi-finished products, components or materials with higher weight or sensitivity. c.1K3 (equivalent to 3K5): This level includes the conditions of 1K2 and is suitable for ordinary warehouse conditions. It is suitable for storing electrical products that are generally resistant to moisture and cold. Usually, this type of warehouse has no temperature and humidity control facilities, but it can have heating equipment, especially in places where the outdoor temperature is too low, to ensure the specified temperature conditions. The stored products may be affected by water other than condensation and rainfall and icing conditions.
d.1K3L (equivalent to 3K5L): The conditions are basically the same as 3K5, the only difference is that the high temperature conditions are slightly lower than 3K5, which is specified as 40℃. This level is applicable to warehouses under general conditions in most parts of my country. e.1K4, 1K4L, 15, 1K6 (equivalent to 3K6, 3K6L, 3K7, 3K8): These levels include the conditions of 1K3, Applicable to climate-protected places without temperature and humidity control, including places with partial climate protection or direct access to the outdoors. Buildings with certain structures and warehouses and sheds that are greatly affected by the external climate belong to this type of conditions. Products with good weather resistance can be stored under such conditions. The stored products will be exposed to weak or normal sunlight radiation and thermal radiation, as well as wind entering through doors and windows, rain and snow blown in by the wind; water other than rainfall, as well as condensation and icing conditions. f. 1K7, 1K8, 1KgL (equivalent to 4K1, 4K2, 4K3): These grades are suitable for places without climate protection. (a) 1K7: This grade is used in places without climate protection, directly exposed to the "limited group" of outdoor climate groups specified in GB4797.1-84 "Natural Environmental Conditions, Temperature and Humidity of Electrical and Electrical Products", including "warm and cold" (b) 1K8: This level is used for open-air warehouses without weather protection that are directly exposed to the "general group" of outdoor climate groups in GB4797.1, including "cold temperature", "warm temperature", "dry heat", "sub-humid heat" and "humid heat" climate zones. (c) 1K9L: This level is used for open-air warehouses without weather protection that are directly exposed to the "general group" of outdoor climate groups in GB4797.1, including "cold", "cold temperature", "warm temperature", "dry heat", "sub-humid heat" and "humid heat" climate zones. The severity of the parameters for each climate level is specified in Table 2. The stored products may also be affected by thermal radiation, ambient air movement and water other than rainfall. If applicable, the severity of the level in Table 3 may be used. A.2.2 The three levels of biological environmental conditions are explained as follows: a. 1B1 (equivalent to 3B1 ): This level is suitable for places without obvious biological hazards, that is, the products are specially designed or stored in places without bacteria growth and animal hazards. b.1B2 (equivalent to 3B2, 4B1: This level includes the conditions of 1B1 and is suitable for places with mold growth and animal hazards (except ants).
GB4798.1-86
c.1B3 (equivalent to J3B3, 4B2): This level includes the conditions of 1B2 and is suitable for places with mold growth and animal hazards (including termites).
A.2.3 Chemically active substances The three levels are explained as follows: a, 1C1 (equivalent to 3C1, 4C1): This level is suitable for warehouses in rural or urban areas with less industrial production activities and medium transportation.
Pollution may be aggravated when heating in cities in winter. Salt spray will appear in sheltered places on the coast. b. 1C2 (equivalent to 3C2, 4C2): This level includes the conditions of 1C1 and is suitable for warehouses with a general degree of pollution. Industrially developed areas or cities with busy traffic. c: 1C3 (equivalent to 3C3, 4C3): This level includes the conditions of 1C2 and is suitable for warehouses close to industrial chemical pollution sources. A.2.4 The four levels of mechanically active substances are explained as follows: 8.1S1 (equivalent to 3S1): This level is suitable for warehouses that have adopted dust prevention facilities to minimize the dust content, and the building structure can prevent sand from entering.
b.1S2 (equivalent to 3S2): This level includes the conditions of 1S1 and is suitable for warehouses without special protective measures to minimize the dust and sand content, but the warehouse is not located near the sand and dust source. C.1S3 (equivalent to 4S2): This level includes the conditions of 1S2 and is suitable for warehouses close to sand and dust sources, including warehouses in urban areas.
d. 1S4 (equivalent to 4S3): This level includes the conditions of 1S3 and is suitable for warehouses with a lot of wind and dust in the air, and for places where sand and dust are generated during the production process. A.2.5 The five levels of mechanical environmental conditions are explained as follows: a.1M1, 1M2 (equivalent to 3M1, 4M1 and 3M2, 4M2): This level is suitable for warehouses that can prevent obvious vibration and impact.
b. 1M3 (equivalent to 3M4, 4M4): This level includes the conditions of 1M1 and 1M2 and is suitable for warehouses that may be vibrated by the passing of machines or vehicles, or impacted by external blasting and piling. c.1M4 (equivalent to 3M6, 4M6): This level includes the conditions of 1M3 and is suitable for warehouses with high levels of impact, such as impact and vibration caused by nearby machines, conveyor belts, etc. Additional notes:
This standard is proposed by the National Technical Committee for Standardization of Environmental Conditions and Environmental Testing of Electronic Products in Power Plants (abbreviated as the Environmental Standardization Committee). This standard was drafted by the Storage Environment Working Group of the Environmental Standardization Committee. The main drafters of this standard are Hao Xueming, Zhao Peiyu, Wang Xiurong, Li Zhiqing, Zheng Xuan, and Che Naizhong.1. The description of the eleven levels of climatic environmental conditions is as follows: 8. 1K1 (equivalent to 3K1): This level is to ensure the storage requirements of high-precision and high-sensitivity electronic products, and is suitable for fully air-conditioned closed places. Some warehouses storing precision instruments and electronic components belong to this level. The stored products may be affected by the scattering of solar radiation and the air movement caused by the air-conditioning system, but will not be affected by heat radiation, condensation, precipitation (rain, snow,) and water other than rainfall (dripping, splashing), ice and other conditions. b. 1K2 (equivalent to 3K3): This level includes the conditions of 1K1 and is suitable for electronic products that require better storage conditions. In order to ensure the required storage conditions, when the temperature difference between the closed indoor and outdoor is too large or the conditions do not meet the requirements, cooling or heating measures can be taken to control the temperature conditions (without controlling the humidity). Its environment will be affected by the sunlight radiation entering through the glass windows and the air flow caused by opening the windows or special reasons. However, there are no environmental factors such as condensation, precipitation, water other than precipitation, and ice. This storage condition is suitable for products, semi-finished products, components or materials that are heavier or more sensitive. c.1K3 (equivalent to 3K5): This level includes the conditions of 1K2 and is suitable for ordinary warehouse conditions. It is suitable for storing electrical products that are generally resistant to moisture and cold. Usually, this type of warehouse does not have temperature and humidity control facilities, but it can have heating equipment, especially in places where the outdoor temperature is too low, to ensure the specified temperature conditions. The stored products may be affected by water other than condensation and rainfall, and freezing conditions.
d.1K3L (equivalent to 3K5L): The conditions are basically the same as 3K5, the only difference is that the high temperature conditions are slightly lower than 3K5, which is specified as 40°C. This level is applicable to warehouses under general conditions in most parts of my country. e.1K4, 1K4L, 15, 1K6 (equivalent to 3K6, 3K6L, 3K7, 3K8): These levels include the conditions of 1K3, Applicable to climate-protected places without temperature and humidity control, including places with partial climate protection or direct access to the outdoors. Buildings with certain structures and warehouses and sheds that are greatly affected by the external climate belong to this type of conditions. Products with good weather resistance can be stored under such conditions. The stored products will be exposed to weak or normal sunlight radiation and thermal radiation, as well as wind entering through doors and windows, rain and snow blown in by the wind; water other than rainfall, as well as condensation and icing conditions. f. 1K7, 1K8, 1KgL (equivalent to 4K1, 4K2, 4K3): These grades are suitable for places without climate protection. (a) 1K7: This grade is used in places without climate protection, directly exposed to the "limited group" of outdoor climate groups specified in GB4797.1-84 "Natural Environmental Conditions, Temperature and Humidity of Electrical and Electrical Products", including "warm and cold" (b) 1K8: This level is used for open-air warehouses without weather protection that are directly exposed to the "general group" of outdoor climate groups in GB4797.1, including "cold temperature", "warm temperature", "dry heat", "sub-humid heat" and "humid heat" climate zones. (c) 1K9L: This level is used for open-air warehouses without weather protection that are directly exposed to the "general group" of outdoor climate groups in GB4797.1, including "cold", "cold temperature", "warm temperature", "dry heat", "sub-humid heat" and "humid heat" climate zones. The severity of the parameters for each climate level is specified in Table 2. The stored products may also be affected by thermal radiation, ambient air movement and water other than rainfall. If applicable, the severity of the level in Table 3 may be used. A.2.2 The three levels of biological environmental conditions are explained as follows: a. 1B1 (equivalent to 3B1 ): This level is suitable for places without obvious biological hazards, that is, the products are specially designed or stored in places without bacteria growth and animal hazards. b.1B2 (equivalent to 3B2, 4B1: This level includes the conditions of 1B1 and is suitable for places with mold growth and animal hazards (except ants).
GB4798.1-86
c.1B3 (equivalent to J3B3, 4B2): This level includes the conditions of 1B2 and is suitable for places with mold growth and animal hazards (including termites).
A.2.3 Chemically active substances The three levels are explained as follows: a, 1C1 (equivalent to 3C1, 4C1): This level is suitable for warehouses in rural or urban areas with less industrial production activities and medium transportation.
Pollution may be aggravated when heating in cities in winter. Salt spray will appear in sheltered places on the coast. b. 1C2 (equivalent to 3C2, 4C2): This level includes the conditions of 1C1 and is suitable for warehouses with a general degree of pollution. Industrially developed areas or cities with busy traffic. c: 1C3 (equivalent to 3C3, 4C3): This level includes the conditions of 1C2 and is suitable for warehouses close to industrial chemical pollution sources. A.2.4 The four levels of mechanically active substances are explained as follows: 8.1S1 (equivalent to 3S1): This level is suitable for warehouses that have adopted dust prevention facilities to minimize the dust content, and the building structure can prevent sand from entering.
b.1S2 (equivalent to 3S2): This level includes the conditions of 1S1 and is suitable for warehouses without special protective measures to minimize the dust and sand content, but the warehouse is not located near the sand and dust source. C.1S3 (equivalent to 4S2): This level includes the conditions of 1S2 and is suitable for warehouses close to sand and dust sources, including warehouses in urban areas.
d. 1S4 (equivalent to 4S3): This level includes the conditions of 1S3 and is suitable for warehouses with a lot of wind and dust in the air, and for places where sand and dust are generated during the production process. A.2.5 The five levels of mechanical environmental conditions are explained as follows: a.1M1, 1M2 (equivalent to 3M1, 4M1 and 3M2, 4M2): This level is suitable for warehouses that can prevent obvious vibration and impact.
b. 1M3 (equivalent to 3M4, 4M4): This level includes the conditions of 1M1 and 1M2 and is suitable for warehouses that may be vibrated by the passing of machines or vehicles, or impacted by external blasting and piling. c.1M4 (equivalent to 3M6, 4M6): This level includes the conditions of 1M3 and is suitable for warehouses with high levels of impact, such as impact and vibration caused by nearby machines, conveyor belts, etc. Additional notes:
This standard is proposed by the National Technical Committee for Standardization of Environmental Conditions and Environmental Testing of Electronic Products in Power Plants (abbreviated as the Environmental Standardization Committee). This standard was drafted by the Storage Environment Working Group of the Environmental Standardization Committee. The main drafters of this standard are Hao Xueming, Zhao Peiyu, Wang Xiurong, Li Zhiqing, Zheng Xuan, and Che Naizhong.1. The description of the eleven levels of climatic environmental conditions is as follows: 8. 1K1 (equivalent to 3K1): This level is to ensure the storage requirements of high-precision and high-sensitivity electronic products, and is suitable for fully air-conditioned closed places. Some warehouses storing precision instruments and electronic components belong to this level. The stored products may be affected by the scattering of solar radiation and the air movement caused by the air-conditioning system, but will not be affected by heat radiation, condensation, precipitation (rain, snow,) and water other than rainfall (dripping, splashing), ice and other conditions. b. 1K2 (equivalent to 3K3): This level includes the conditions of 1K1 and is suitable for electronic products that require better storage conditions. In order to ensure the required storage conditions, when the temperature difference between the closed indoor and outdoor is too large or the conditions do not meet the requirements, cooling or heating measures can be taken to control the temperature conditions (without controlling the humidity). Its environment will be affected by the sunlight radiation entering through the glass windows and the air flow caused by opening the windows or special reasons. However, there are no environmental factors such as condensation, precipitation, water other than precipitation, and ice. This storage condition is suitable for products, semi-finished products, components or materials that are heavier or more sensitive. c.1K3 (equivalent to 3K5): This level includes the conditions of 1K2 and is suitable for ordinary warehouse conditions. It is suitable for storing electrical products that are generally resistant to moisture and cold. Usually, this type of warehouse does not have temperature and humidity control facilities, but it can have heating equipment, especially in places where the outdoor temperature is too low, to ensure the specified temperature conditions. The stored products may be affected by water other than condensation and rainfall, and freezing conditions.
d.1K3L (equivalent to 3K5L): The conditions are basically the same as 3K5, the only difference is that the high temperature conditions are slightly lower than 3K5, which is specified as 40°C. This level is applicable to warehouses under general conditions in most parts of my country. e.1K4, 1K4L, 15, 1K6 (equivalent to 3K6, 3K6L, 3K7, 3K8): These levels include the conditions of 1K3, Applicable to climate-protected places without temperature and humidity control, including places with partial climate protection or direct access to the outdoors. Buildings with certain structures and warehouses and sheds that are greatly affected by the external climate belong to this type of conditions. Products with good weather resistance can be stored under such conditions. The stored products will be exposed to weak or normal sunlight radiation and thermal radiation, as well as wind entering through doors and windows, rain and snow blown in by the wind; water other than rainfall, as well as condensation and icing conditions. f. 1K7, 1K8, 1KgL (equivalent to 4K1, 4K2, 4K3): These grades are suitable for places without climate protection. (a) 1K7: This grade is used in places without climate protection, directly exposed to the "limited group" of outdoor climate groups specified in GB4797.1-84 "Natural Environmental Conditions, Temperature and Humidity of Electrical and Electrical Products", including "warm and cold" (b) 1K8: This level is used for open-air warehouses without weather protection that are directly exposed to the "general group" of outdoor climate groups in GB4797.1, including "cold temperature", "warm temperature", "dry heat", "sub-humid heat" and "humid heat" climate zones. (c) 1K9L: This level is used for open-air warehouses without weather protection that are directly exposed to the "general group" of outdoor climate groups in GB4797.1, including "cold", "cold temperature", "warm temperature", "dry heat", "sub-humid heat" and "humid heat" climate zones. The severity of the parameters for each climate level is specified in Table 2. The stored products may also be affected by thermal radiation, ambient air movement and water other than rainfall. If applicable, the severity of the level in Table 3 may be used. A.2.2 The three levels of biological environmental conditions are explained as follows: a. 1B1 (equivalent to 3B1 ): This level is suitable for places without obvious biological hazards, that is, the products are specially designed or stored in places without bacteria growth and animal hazards. b.1B2 (equivalent to 3B2, 4B1: This level includes the conditions of 1B1 and is suitable for places with mold growth and animal hazards (except ants).
GB4798.1-86
c.1B3 (equivalent to J3B3, 4B2): This level includes the conditions of 1B2 and is suitable for places with mold growth and animal hazards (including termites).
A.2.3 Chemically active substances The three levels are explained as follows: a, 1C1 (equivalent to 3C1, 4C1): This level is suitable for warehouses in rural or urban areas with less industrial production activities and medium transportation.
Pollution may be aggravated when heating in cities in winter. Salt spray will appear in sheltered places on the coast. b. 1C2 (equivalent to 3C2, 4C2): This level includes the conditions of 1C1 and is suitable for warehouses with a general degree of pollution. Industrially developed areas or cities with busy traffic. c: 1C3 (equivalent to 3C3, 4C3): This level includes the conditions of 1C2 and is suitable for warehouses close to industrial chemical pollution sources. A.2.4 The four levels of mechanically active substances are explained as follows: 8.1S1 (equivalent to 3S1): This level is suitable for warehouses that have adopted dust prevention facilities to minimize the dust content, and the building structure can prevent sand from entering.
b.1S2 (equivalent to 3S2): This level includes the conditions of 1S1 and is suitable for warehouses without special protective measures to minimize the dust and sand content, but the warehouse is not located near the sand and dust source. C.1S3 (equivalent to 4S2): This level includes the conditions of 1S2 and is suitable for warehouses close to sand and dust sources, including warehouses in urban areas.
d. 1S4 (equivalent to 4S3): This level includes the conditions of 1S3 and is suitable for warehouses with a lot of wind and dust in the air, and for places where sand and dust are generated during the production process. A.2.5 The five levels of mechanical environmental conditions are explained as follows: a.1M1, 1M2 (equivalent to 3M1, 4M1 and 3M2, 4M2): This level is suitable for warehouses that can prevent obvious vibration and impact.
b. 1M3 (equivalent to 3M4, 4M4): This level includes the conditions of 1M1 and 1M2 and is suitable for warehouses that may be vibrated by the passing of machines or vehicles, or impacted by external blasting and piling. c.1M4 (equivalent to 3M6, 4M6): This level includes the conditions of 1M3 and is suitable for warehouses with high levels of impact, such as impact and vibration caused by nearby machines, conveyor belts, etc. Additional notes:
This standard is proposed by the National Technical Committee for Standardization of Environmental Conditions and Environmental Testing of Electronic Products in Power Plants (abbreviated as the Environmental Standardization Committee). This standard was drafted by the Storage Environment Working Group of the Environmental Standardization Committee. The main drafters of this standard are Hao Xueming, Zhao Peiyu, Wang Xiurong, Li Zhiqing, Zheng Xuan, and Che Naizhong.1-84 "Limited group" of outdoor climate groups specified in "Natural environmental conditions, temperature and humidity for electrical products", including open-air warehouses in "warm and warm" climate zones. (b) 1K8: This level is applied to "general group" of outdoor climate groups specified in GB4797.1 without weather protection, including open-air warehouses in "cold and warm", "hot" and "sub-humid and hot" climate zones. (c) 1K9L: This level is applied to "general group" of outdoor climate groups specified in GB4797.1 without weather protection, including open-air warehouses in "cold", "cold and warm", "warm and warm", "dry and hot", "sub-humid and hot" climate zones. The severity of the parameters for each climate level is specified in Table 2. The stored products may also be affected by thermal radiation, ambient air movement and water other than rainfall. If applicable, the severity of the level in Table 3 may be used. A.2.2 The three levels of biological environmental conditions are explained as follows: a. 1B1 (equivalent to 3B1): This level is suitable for places without obvious biological hazards, that is, the products are specially designed or stored in places without bacteria growth and animal hazards. b.1B2 (equivalent to 3B2, 4B1: This level includes the conditions of 1B1 and is suitable for places with mold growth and animal hazards (except ants).
GB4798.1-86
c.1B3 (equivalent to J3B3, 4B2): This level includes the conditions of 1B2 and is suitable for places with mold growth and animal hazards (including termites).
A.2.3 Chemically active substance conditions The three levels are explained as follows: a, 1C1 (equivalent to 3C1, 4C1): This level is suitable for warehouses in rural or urban areas with less industrial production activities and medium transportation.
Cities may use heating in winter Pollution is getting worse. Salt spray will appear in sheltered places on the coast. b. 1C2 (equivalent to 3C2, 4C2): This level includes the conditions of 1C1 and is applicable to warehouses with a general degree of pollution. Warehouses in industrially developed areas or cities with busy traffic. c: 1C3 (equivalent to 3C3, 4C3): This level includes the conditions of 1C2 and is applicable to warehouses close to industrial chemical pollution sources. A.2.4 The four levels of mechanically active substance conditions are explained as follows: 8.1S1 (equivalent to 3S1): This level is applicable to warehouses that have adopted dust prevention facilities to minimize the dust content, and the building structure can prevent sand from entering.
b.1S2 (equivalent to 3S2): This level includes the conditions of 1S1 and is applicable For warehouses without special protective measures to reduce the content of dust and sand to a minimum, but the warehouses are not located near the source of sand and dust. C.1S3 (equivalent to 4S2): This level includes the conditions of 1S2 and is suitable for warehouses close to the source of sand and dust, including warehouses in urban areas.
d. 1S4 (equivalent to 4S3): This level includes the conditions of 1S3 and is suitable for warehouses with a lot of wind and dust and dust in the air, and is suitable for places where sand and dust are generated during the production process. A.2.5 The five levels of mechanical environmental conditions are explained as follows: a.1M1, 1M2 (equivalent to 3M1, 4M1 and 3M2, 4M2): This level is suitable for warehouses that can prevent obvious vibration and shock.
b. 1 M3 (equivalent to 3M4, 4M4): This level includes the conditions of 1M1 and 1M2, and is suitable for warehouses that may be vibrated by the passing of machines or vehicles, or impacted by external blasting or piling. c.1M4 (equivalent to 3M6, 4M6): This level includes the conditions of 1M3, and is suitable for warehouses with high levels of impact, such as impact and vibration caused by nearby machines, conveyor belts, etc. Additional notes:
This standard was proposed by the National Technical Committee for Standardization of Environmental Conditions and Environmental Testing for Electronic Products in Power Plants (abbreviated as the Environmental Standardization Committee). This standard was drafted by the Storage Environment Working Group of the Environmental Standardization Committee. The main drafters of this standard are Hao Xueming, Zhao Peiyu, Wang Xiurong, Li Zhiqing, Zheng Xuan, and Che Naizhong. 6511-84 "Limited group" of outdoor climate groups specified in "Natural environmental conditions, temperature and humidity for electrical products", including open-air warehouses in "warm and warm" climate zones. (b) 1K8: This level is applied to "general group" of outdoor climate groups specified in GB4797.1 without weather protection, including open-air warehouses in "cold and warm", "hot" and "sub-humid and hot" climate zones. (c) 1K9L: This level is applied to "general group" of outdoor climate groups specified in GB4797.1 without weather protection, including open-air warehouses in "cold", "cold and warm", "warm and warm", "dry and hot", "sub-humid and hot" climate zones. The severity of the parameters for each climate level is specified in Table 2. The stored products may also be affected by thermal radiation, ambient air movement and water other than rainfall. If applicable, the severity of the level in Table 3 may be used. A.2.2 The three levels of biological environmental conditions are explained as follows: a. 1B1 (equivalent to 3B1): This level is suitable for places without obvious biological hazards, that is, the products are specially designed or stored in places without bacteria growth and animal hazards. b.1B2 (equivalent to 3B2, 4B1: This level includes the conditions of 1B1 and is suitable for places with mold growth and animal hazards (except ants).
GB4798.1-86
c.1B3 (equivalent to J3B3, 4B2): This level includes the conditions of 1B2 and is suitable for places with mold growth and animal hazards (including termites).
A.2.3 Chemically active substance conditions The three levels are explained as follows: a, 1C1 (equivalent to 3C1, 4C1): This level is suitable for warehouses in rural or urban areas with less industrial production activities and medium transportation.
Cities may use heating in winter Pollution is getting worse. Salt spray will appear in sheltered places on the coast. b. 1C2 (equivalent to 3C2, 4C2): This level includes the conditions of 1C1 and is applicable to warehouses with a general degree of pollution. Warehouses in industrially developed areas or cities with busy traffic. c: 1C3 (equivalent to 3C3, 4C3): This level includes the conditions of 1C2 and is applicable to warehouses close to industrial chemical pollution sources. A.2.4 The four levels of mechanically active substance conditions are explained as follows: 8.1S1 (equivalent to 3S1): This level is applicable to warehouses that have adopted dust prevention facilities to minimize the dust content, and the building structure can prevent sand from entering.
b.1S2 (equivalent to 3S2): This level includes the conditions of 1S1 and is applicable For warehouses without special protective measures to reduce the content of dust and sand to a minimum, but the warehouses are not located near the source of sand and dust. C.1S3 (equivalent to 4S2): This level includes the conditions of 1S2 and is suitable for warehouses close to the source of sand and dust, including warehouses in urban areas.
d. 1S4 (equivalent to 4S3): This level includes the conditions of 1S3 and is suitable for warehouses with a lot of wind and dust and dust in the air, and is suitable for places where sand and dust are generated during the production process. A.2.5 The five levels of mechanical environmental conditions are explained as follows: a.1M1, 1M2 (equivalent to 3M1, 4M1 and 3M2, 4M2): This level is suitable for warehouses that can prevent obvious vibration and shock.
b. 1 M3 (equivalent to 3M4, 4M4): This level includes the conditions of 1M1 and 1M2, and is suitable for warehouses that may be vibrated by the passing of machines or vehicles, or impacted by external blasting or piling. c.1M4 (equivalent to 3M6, 4M6): This level includes the conditions of 1M3, and is suitable for warehouses with high levels of impact, such as impact and vibration caused by nearby machines, conveyor belts, etc. Additional notes:
This standard was proposed by the National Technical Committee for Standardization of Environmental Conditions and Environmental Testing for Electronic Products in Power Plants (abbreviated as the Environmental Standardization Committee). This standard was drafted by the Storage Environment Working Group of the Environmental Standardization Committee. The main drafters of this standard are Hao Xueming, Zhao Peiyu, Wang Xiurong, Li Zhiqing, Zheng Xuan, and Che Naizhong. 651
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.