This standard specifies the verification items, main instruments and requirements, verification conditions, number and placement of measuring points, verification steps, data processing and verification results of high-low-temperature and low-pressure (including low pressure, low-temperature low pressure and high-temperature low pressure) test equipment during periodic verification. This standard is applicable to the periodic verification of test equipment used in GB 2423.21-91 "Basic Environmental Test Procedure for Electric and Electronic Products Test M: Low Pressure Test Method", GB/T 2423.25-92 "Basic Environmental Test Procedure for Electric and Electronic Products Test Z/AM: Low Temperature/Low Pressure Comprehensive Test Method" and GB/T 2423.26-92 "Basic Environmental Test Procedure for Electric and Electronic Products Test Z/BM: High Temperature/Low Pressure Comprehensive Test Method". This standard is also applicable to the periodic verification of similar test equipment. GB/T 5170.10-1996 Basic parameter verification method of environmental test equipment for electrical and electronic products High and low temperature and low pressure test equipment GB/T5170.10-1996 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
GB/T 5170.10—1996
Environmental test equipment for electric and electronic products
Basic parameter verification methods
High and low temperature and low air pressure testing equipment
Inspection mcthods for basic parametersof environmcntal tcsting equipmentsfor electric and electrnnic productsCombined high and low temperaturc/lowair pressure lesting eguipments1996-06-17Promulgated
State Administration of Technical Supervision
199707-01Implementation
GB/T5170.10—'996wwW.bzxz.Net
This standard is one of the standards in the GR/T17 standard for basic parameter verification methods of environmental or inspection equipment for electronic products. This standard (B5170.1C-81) specifies the basic verification methods for environmental equipment of electrical products, high and low temperature and low pressure tests. Compared with the 155 standard, this standard has the following changes: 1. This standard is mainly used for periodic inspection of environmental test equipment during use, to distinguish the core test of the product: in the verification items, three items are added: "humidity difference of working space in the studio", "radiation concentration in the studio" and "relative test items": a chapter on "reference standards" is added: in the "verification instrument", the requirements for the instrument are specified! A chapter on "verification conditions" is added, and a chapter on temperature measurement is added. The equipment working space volume is changed from "1m" to "2m" for the equipment with a temperature range of 21 points. When the test is set to a fixed time, the "temperature error" is shortened to 30mm. In the "data processing", the calculation formulas of "temperature difference" and "gas deviation" are given. When the temperature is normalized, the low pressure value is about 1kP. Then the "temperature difference" is allowed to be appropriately adjusted. In the "test result processing", the "mixed field and gas field replacement value and the calculation method of the sample value of each instrument" are added, and the following necessary instructions are given for qualified (limited use): In addition to the measurement trace record.
GBT5170T core product environmental test equipment basic The series of standards on "parameter verification methods" include the following parts: (H/T5173.1 General principles for verification methods of environmental test equipment for electrical and electronic products: -173.2 Basic verification methods for environmental test equipment for electrical and electronic products - Low temperature test equipment: -G/T5170.5 Basic parameter verification methods for environmental test equipment for electrical and electronic products - Wet heat test equipment: -GB/T5173.8 Basic parameter setting methods for environmental test equipment for electrical and electronic products: -CB/T5175.9 Basic parameter verification methods for environmental test equipment for electrical and electronic products - Radiation test equipment! -H/T5170.1 Basic parameter setting methods for environmental test equipment for electrical and electronic products - Low temperature test equipment GB/T5170.11 Verification method for environmental testing equipment for good electronic products: This standard shall replace GB517G,1085 from the date of production. This standard was proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Institute of Chemical Engineering of the Ministry of Electronics Industry, and the main drafting unit of this standard is the Fifth Institute of Biguan Industry. The authors of this standard are Fu Wenfan, Xie Jianhua, Ji Xuejin, Wang Yan, and Xue Zhenshuang. Corrosion test equipment,
1 Standard application
National Standard of the People's Republic of China
Electrical and electronic product environmental test equipment
Basic parameter verification method
High and low temperature and low pressure test equipment
lnspectlon 1.1 This standard specifies the main items, instruments and requirements for the calibration of high and low temperature (including low pressure, high and low temperature) test equipment, the calibration cases, the test points and positions, the calibration steps, the data processing and the calibration results. 1.2 This standard is applicable to B2423.21-918 basic environmental test method for electric and elcetronic products, low and high pressure test method 3. GB 2423.2-2 Basic environmental test procedures for electric and electronic products Test 2/AM Low full pressure combined test method 2 T/T2125, 26-92 Basic environmental or test procedures for electric and electronic products Test 2/HM: High temperature/air combined test method 3 The use of test equipment for periodic inspection
This standard is also applicable to similar test equipment for periodic inspection. 2. Reference standards
The following standards have also become the implementation documents of this standard through the state in this standard. When this standard is issued, the short version shown is valid. All standard parts have been revised, and the parties using the standards should explore the feasibility of using the following standards. G15:70.1199T Product environmental test preparation basic difference determination method total ratio GB15:70.2199% Electrical product environmental test preparation basic difference determination method temperature test equipment GB2423.21-9 = Electrical.L Electrical product basic environmental test channel test M: required pressure test method (H/T 2423-25-92 Electrical product six environment test current test 2/AM: low temperature/low air combined test method G/T 2423.26-92 Electrical atomic product rotation cycle test specification application test Z/BM, comprehensive temperature/low air monitoring verification 5 methods 3 verification items
The inspection items specified in this standard are as follows:
Low pressure mean difference,
Average change of air pressure;
Comprehensive temperature image and air pressure difference: The annual average change rate of the source and the average change rate of the air level are approved by the State Administration of Technical Supervision on 199606.17
1997.0793
4 Main instruments for verification
4.7 Low pressure equipment
G6/7 5170.10—1996
According to Shenzhen standard, the accuracy of the calibrometer or other similar barometer (gauge) should not exceed the allowable error of 1.4.2 Temperature and measuring instruments
For the temperature measuring system composed of a thermocouple, a thermal sensor or other temperature sensing element and a secondary instrument, the normal deviation of the sensor is not more than 21°, and the accuracy of other systems is not more than 0.2°.5 Verification elements
5.1 The equipment is subjected to periodic climatic conditions, The power supply conditions, use conditions and other conditions shall comply with the 1st section of UB/T5170.1-1935. 5.2 The appearance and safety conditions of the equipment under test shall comply with the provisions of UB/T5170.1-195 Section 8. 6 Measurement points and positions 6.1 According to the size of the test equipment, the working space shall be divided into front, middle and rear types or upper, middle and lower (support type) and a certain number of terminals shall be placed in the designated positions according to the effect. The sensor should avoid direct radiation from cold and heat sources. The humidity control station must be represented by the letters UABCDEFGHJ, KL, M, NU. The low pressure measurement point is a positive indication point of the test equipment, and the measuring point is the geometric center point of the equipment. The position of each measuring point is about 110 meters from the entire working space of the equipment (the maximum distance cannot be greater than 0, and the minimum distance can be less than 50m. If the equipment has a sample rack or a dropped product, When the vehicle is used, the lower measuring point can be placed at m on the sample rack or the sweeping vehicle. 6.2 When the equipment capacity is less than or equal to 2n, the number of measuring points is 9, and the layout is shown in Figure 1. When the equipment capacity is 2m, the temperature limit points are 10, and the layout is shown in Figure 3. 6.3
6.4 According to the requirements of the comparison and verification, the number of points can be increased on the equipment. 6.5 For other shapes of test equipment, the number of points and the maintenance can be adjusted according to the above steps. Verification steps
7.1 Sensor placement
According to the requirements of the fifth clause of the cloud standard: a certain number of sensor panels should be placed on the equipment working space. 7.2 Installation
GBT517Q.10—1996
Install the load according to the provisions of clause 17, 1-1S5 of the first chapter. If the load cannot be installed due to reasons such as the lighting fixture, the sensor can be tested under empty conditions. This should be noted in the control report. 7.3 Nominal value for reverse swing calibration
7.3.1 Selection of nominal temperature value
Within the available range of temperature, generally the representative temperature values ​​specified in GB/T2123.25 and GB/T2:23.2G standards are selected. It is recommended that the instrument select the lowest temperature among the following temperature values: -65°C, -55°C, -40, -25°C, -10°C, -5°C, etc. Commercial temperature: +aG, +4c+5, -70℃, +85+100.+1.+155℃.+175, +200℃, etc. According to the needs of the inspection, you can select its inspection nominal value, 7.3.2 Select the low pressure nominal value
Within the low pressure normal range of the equipment, generally select the representative account normal pressure value specified in standard 23.21, and select from the following gas values: 1kFa.2kPa, 1kPakFa, 15Pa.25kPa, 0kFa, 5kP, 1.5kPa, kFa, 79.≤kP=, RI kPa, etc.
Station test and inspection is the key, and also gradually select its low pressure nominal value. 7.4 Low pressure deviation calibration 7.2.1 Adjust the air pressure controller to the required nominal low pressure value. 7.4.2 Enable all pressure reduction measures. After the indicating point pressure drops to the standard pressure value, set it to 30m/s and perform measurement. Measure the indicating point pressure twice thereafter, for a total of 15 times. 7.4.3 For equipment after normal use and maintenance, the measuring time should be at least 30min. For equipment after installation and commissioning and unsealed for reuse, measure it again after 30min, for a total of 2h. 7.5 Steps for averaging the air pressure setting rate
7.5.1 Adjust the air pressure controller of the test equipment to the required standard pressure. 7.5.2 Depressurize the equipment and record the time required for the air pressure at the indicating point to reach the specified pressure. 7.5.3 Raise the pressure of the equipment and record the time required for the air pressure at the indicating point to recover from the standard pressure to the specified pressure. 7.6 Steps for averaging the air pressure setting rate
7.5.1 Adjust the air pressure controller and temperature controller of the test equipment to the required nominal pressure and temperature respectively. 7.6.? Allow the equipment to warm up and stabilize for 2 hours after the temperature of the indicating point in the working space reaches the nominal temperature for the first time (or the equipment reaches the self-determined state). 7.5.3 Start the temperature sensor system. When the air pressure drops to the nominal pressure, maintain the pressure for 5 minutes and measure the pressure and temperature immediately. 7.6.4 Measure the temperature of the measuring point and the pressure of the indicating point for 15 times within 31 minutes. 7.6.5 For equipment that has been used for a long time, the reference time should be no less than 1 minute. n For the equipment that has been debugged and is in use after the new hazardous seal, measure it again after 30 minutes of reduction, and measure it every 1 hour: change the low pressure measurement 2 temperature measurements for a total of 24 hours. 7.7 Temperature change rate and average pressure change rate are combined according to the specified steps 7.7.1 The measurement points of the short-term change rate and the average pressure change rate are the temperature indication point and the pressure indication point of the equipment respectively 7.7.2 The pressure controller and temperature controller of the test equipment are adjusted separately. 7.7.3 When the average point of the measured value reaches the standard freezing temperature, the equipment is depressurized. When the normal pressure point reaches the nominal pressure point, the air pressure is increased to the normal value. 7.7.4 During the equipment depressurization and temperature increase process, the temperature of the equipment indication point is measured every 5 minutes: During the equipment depressurization and temperature increase process, the time from the normal pressure drop to the nominal pressure point and the time from the nominal pressure increase to the normal pressure point are recorded respectively. 8.1 Data processing 8.1.1 Correction GR/T5170.1—1996 8.1-2 Calculation method of low pressure deviation When the equipment is in a fixed state, the actual maximum pressure value of the working space indication point and the actual measured pressure difference with the nominal pressure value are the low pressure difference of the equipment at the nominal pressure. The calculation formula is APr - Pur -Ps
aP:P...-P.
-pressure deviation, PR
pressure deviation kPE
refers to the measured pressure at the point within 30min (or 25): kPRlPwin——the measured pressure at the point within mia or 2H.kPa:Pa—nominal pressure value, kPa,
81.3 Calculation method of average pressure change rate The formula for the average pressure change is as follows: = (Pa- P/
- (P -P
The average rate of pressure drop: sPa/rnin.—The half-average rate of pressure increase iPa/rmin:. For a given value, Pa/rn:
Nominal pressure value kP/min;
, pressure drop time.min:
1.—Rise time.min.
B.1.4 Calculation method for comprehensive timing humidity difference and pressure deviation: 4.1 Comprehensive calibration temperature difference calculation (1)
When the equipment is in a humid and low air conditioner state, the actual maximum temperature of the working air and the deviation of the measured low temperature from the standard temperature are the humidity of the equipment under the nominal temperature and nominal low air pressure. The calculation formula is as follows: ATheTnx -T.
ATm=Tn-T
sea deviation,
——flow deviation,
refers to the highest temperature within 3)mn(or 2%h>, C; the r-indicator point is within min(or the total minimum temperature within 2h. C-ask you the product value, C
, the kidney gas nominal value is based on the heart P group quality error can be determined in the standard text now is a wide range, day.1.4.2 practice combined inspection real-time gas difference meter method mouse, gas correct timing, gas reverse editing difference let the calculation method connect the standard article 8.1.2 current determination day.1.5 Shenzhen Institute of Timing Source Single Change and Gas Average Change Violation Rate Calculation Method Day.1.51 Comprehensive Inspection Tracking Time Humidity Average Change Purchase Heart Rate Temperature National Calculation Formula is as follows
Fufang You Huadi, ir:
CB/T 5170.10—1996
English sn temperature change value.
B.1.5.2 Comprehensive garbage time-average rate ratio meter and method research, gas is not comprehensive introduction initial ratio, gas bed average rate of change calculation method to replace the provisions of this standard 8.1.3. 8.7. Right teacher result
The data processing result should be selected in accordance with GB2423.2 and GJ3/T423.25GB/T2-23.2G or relevant standards for temperature deviation and gas deviation quality plugging gas average rate of change 8-2 External treatment in test phase
B.2.1 Test equipment temperature field measurement
Equipment information field adjustment method, according to GH517.2-1906 and other 8.2, 1 thermal determination. B.2.2 Test equipment, k adjustment
2.2.1 In the determination, if it is found that the upper deviation of the working space of the equipment exceeds the allowed value, it should be carefully checked and the high standard should be selected. However, it is recommended to select the equipment pressure field and keep the adjustment. R.2.2.2 The adjustment formula is as follows
aP, =,-P
I',. =+fa, F Pue/2
Formula: AP,-equipment pressure field adjustment value.kl\s; Pn——preset pressure field median value,kP;
n——nominal pressure level.kPa
Pu\measurement point at 30m.n or 2h) actual measured high pressure value,kPaF..——measurement point at 30m.n or 2h) actual low pressure positive value.kPa.B-2.2.3 The trial adjustment value of the pressure field should not exceed the allowable value of the pressure deviation, and it shall be noted in the daily inspection report. 2.3 Trial adjustment of the temperature indicator of the equipment: Correction method of the standard indicating instrument of the equipment 6/T5170.21995 8.2.2 stipulates: B.2.4 Trial adjustment of the service pressure holding instrument (8
8.2.4.1. After the calibration, a certain difference shall be made between the measured pressure in the working space of the equipment and the indication of the equipment pressure indicator. If this difference is greater than the allowable deviation of the equipment, the equipment pressure indicator shall be adjusted. 824.7 The correction calculation formula is as follows:
In the calibration, the correction value of the equipment pressure indicator shall be calculated as follows:
The correction value of the pressure indicator shall be calculated within 30mi (kPa) (2min) 82.4.3 The correction value of the pressure indicator shall not exceed the allowable value of the test gas error and shall be stated in the calibration report. 8.3 Specifications
8.3.1 The qualified equipment shall be issued a " 8.3. If the equipment is not qualified, a "notice of verification result" will be issued, and a "certificate of use" will be posted. 8.3.3 When the individual measurement points and the age determination of the inspection points cannot meet the technical index requirements, the light source and the inspection room of the equipment are small. Within the reduced working space and the corresponding temperature range, the requirements of the enterprise shall be met. The qualification result is qualified (installation is>, and the scope of use shall be noted.
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