This standard specifies the basic requirements for the verification method of basic parameters of environmental test equipment, such as terminology, verification conditions, verification instruments, verification cycles, verification loads, and verification result processing. This standard is applicable to the verification of basic parameters of equipment used for environmental testing of electrical and electronic products, and can also be used as a reference for the verification of basic parameters of equipment used for environmental testing of other products. GB/T 5170.1-1995 General principles for verification methods of basic parameters of environmental test equipment for electrical and electronic products GB/T5170.1-1995 Standard download decompression password: www.bzxz.net

UIC 621.3. 08
National Standard of the People's Republic of China
CB/T 5170. 1-1995
Environmental testing equipment for electric and electronic products
Basic parameters verification methods
General
Inspection meihods fur basit parameters ofenvironmenial testing eguipmcnts forelectric and elecironic productsGeneral
1995-04-06 Issued
1996-01-01 Implementation
State Bureau of Technical Supervision
National Standard of the People's Republic of China
Environmental testing equipment for electric and electronic products
Basic parameters verification methods
Iaspection metkedy for basic paraaeterg otrovirgamuatul testing equipment foeelectric and etectrnnic Product Generat
1 Main content and scope of use
1.1 Subject content
GB/T5170.1—1995
Recommended GB 5170.: -35
This standard specifies the basic requirements for the terminology, verification conditions, verification instruments, calibration cycles, verification loads and verification results of environmental test equipment (hereinafter referred to as "equipment"). 1.2 Scope of application
This standard is applicable to the verification of basic parameters of equipment used for environmental testing of electrical and electronic products, and can also be used as a reference for the verification of basic parameters of equipment used for environmental testing of other products. Reference standards
GB2421, General rules for environmental test procedures for electrical and electronic products GB12158 Technical conditions for high temperature test chambers
3 Terms
3.1 General terms
3.1. Environmental parameters The physical, chemical and biological conditions to which the equipment is subjected. 3.1.2 Environmental parameters Characterize one or more physical, chemical and biological characteristics of environmental parameters (such as temperature, humidity, etc.). 3.1.3 Corbined testing equipment Corbined testing equipment A test equipment that can simulate two or more environmental parameters at the same time: 3.1.4 Combination testing equipment Compoite texting equipment Equipment that can simulate a wide range of environmental parameters in sequence. 3.1.5 Standard value numerical value When verifying environmental test equipment, the environmental parameter values ​​specified in the test method or the environmental parameter values ​​predetermined as needed: 3.1.6 Specific load specified load Samples subjected to long-term environmental tests using test equipment, approved by the Technical Supervision Bureau on April 6, 1995, 199601-01 Implementation # 3.1.7 Simulated load simulated load manufactured in accordance with the relevant standards (generally mass, geometric dimensions, sub-wind area and heat capacity factors should be considered) 3.2 Terminology of climate environment test equipment 3.2.1 Test equipment testingequipmentvolumetest chamber (room); the actual volume of the space defined by the inner wall, expressed as 1. 3.2.2Workroomwrirkingsiaue
The test chamber (room> can keep the specified test conditions within the positive cumulative value difference range. That part of the space. 3.2.3Indication pointindicaionpoint
Represents the point of the working space of the test chamber room. Generally, it takes the geometric center point of the working space. It can also be selected according to the equipment. The appropriate inspection point,
3.2.4Standard staleoftestchambertest chamber?The state when the self-indicating point reaches the performance specification requirements of the equipment itself, 3.2.5Temperature fluctuationcemperature:Fiuet:atiar The calculation method is as follows: the change of the temperature of the three indicating points in the working space of the test chamber (room) under the steady state within 30 minutes (test every 2 minutes) is equal to half of the maximum humidity, and the calculation formula is as follows (1): T + (T. - T.)/2
Where: 2.2 degree of fluid dynamics,
T" indicates the highest actual temperature within min, C.Ta
indicates the lowest actual temperature within R0min, C3.2.6 Temperature uniformity The temperature uniformity of the test room is the difference between the test points at the same time at the same time. (5
method, the test room is under a certain state, and each test point in the working space is within Sm1n (test every 2mim-·times). In each test, the actual high-throughput and The arithmetic mean of the difference in low temperature is calculated as follows: AT
Where: T, -: temperature average,
is the actual high temperature of each test point in the first test, and the lowest temperature of each test point in the first test. 3.2.7 Temperature difference (2)
Test chamber > Under a certain condition, the maximum temperature (T) and the maximum temperature (T) measured at the test point in the working space within the specified time are calculated as follows: Upper deviation: AT* TTH
lower deviation: T=T -TN
32-8 relative humidity deviation relative humidity deviation+3
When the test box (room) is in a stable state, the maximum relative humidity () and the minimum relative humidity () measured at each test point in the working space within a specified time are above and below the nominal relative humidity (I%) range. The calculation formula is as follows (5) or (6): deviation, aH.. = H.., Hv
lower deviation AH=Hmn-H
3.2.9 air pressure deviation
When the test box (room) is in a stable state, the upper and lower pressures (product) and low pressures (Pproduct) measured at the indicating points in the working space within a specified time are above and below the nominal relative humidity (I%) range. The calculation formula is as follows (5) or (6): deviation, aH.. = H.., Hv
lower deviation AH=Hmn-H
3.2.9 air pressure deviation
When the test box (room) is in a stable state, the upper and lower pressures (product) and low pressures (Pproduct) measured at the indicating points in the working space within a specified time are above and below the nominal relative humidity (I%) range. 5170.1-1995
Actual nominal air pressure value (production error), calculated by formula (7). Formula (8) Upper deviation P-PPN
Lower deviation: APPi-P
3.2.10 Temperature change ratetemperaturearia-ian te(73
In a test box (room) with a certain time interval and a specified temperature range, the temperature of the working space indicator point rises or falls continuously within a certain period of time, and the change per unit time is expressed in kPa/min. 3.2.11 Air pressure change ratepreB6urevariacicnrade test box (room) within a specified time interval and a specified temperature range, the change per unit time of the working space air (generally refers to the air pressure at the pressure port) rises or falls continuously within a specified period of time and a specified temperature range, and is expressed in kPa/min. 3.2.12 Temperature recovery time The time required for the temperature of the indicating point to recover from the negative pressure after the test chamber (room) reaches a stable state at a certain temperature.
3.2.13 Salt precipitation rate The precipitation rate of salt fog in the working space of the test chamber (room) per unit time on a specified area, expressed as L·Bcm) 3.2.14 Light energy distribution deviation The ratio of the maximum value of the actual measured intensity on the specified radiation surface to the nominal auxiliary radiation intensity in the test chamber (room) under a stable state to the nominal radiation intensity
3.2.15 Light intensity deviation The ratio of the actual measured intensity to the nominal auxiliary radiation intensity at each point in the working space in a specified time to the nominal radiation intensity in the test chamber (room) under a stable state.
3.2.16 Test chamber (room environment) median value of theenvironmenta:paramerers midvalue afttestchamber test chamber test (demonstration) under stable conditions, the arithmetic mean of the highest measured value and the lowest measured value within 31min of the test points in the working space,
3.2.17 adjustedalueaftetchamber test chamber (chamber) the difference between the compensated and nominal values ​​of the environmental parameters in the working space of the test chamber (chamber). 3.2. corrective value of indicating instrument in test chamber (chamber) under stable conditions, the difference between the median value of the working space environmental parameter and the indicated value of the indicating instrument in the test chamber (chamber), 3.3 Terminology of mechanical environmental test equipment
3.3.1 Frequency range
The operating room that can meet the specified maximum wind speed indicators. 3.3.2 Frequency indication error: The deviation of the frequency indication value from the actual frequency when the frequency reporting station is in motion. 3.3.3 Rate stability: The ability to maintain the rated frequency unchanged when the frequency reporting station is in motion, expressed by the change in the rate within the specified time period. 3.3.4 Scanning rate error The error of the rate of change of the amplitude with respect to the specified scanning rate (one frequency difference per unit) during the vibration of the vibration table, expressed as a percentage. 3.3.5 Amplitude indication error The error of the amplitude indication value of the vibration table relative to the actual value. 3.3.6 Vibration accuracy The energy of the vibration table to remain unchanged on the coordinates during the vibration of the vibration table, expressed as the deviation of the actual value of the control point relative to the relaxation value in decibels (lB). Formula (9) Calculate: Where: --- Vibration accuracy GB/T 5170.1 N= 20lga,/ag?
The setting value of the control point amplitude in the same frequency sweep report; 2 The actual value of the control point amplitude function of the frequency sweep report: 3.3. The background average speed kroundnniseacceleratinn(D)
The frequency sweep report is in the working state, and the setting frequency is the mother small (the excitation signal of the electric table is equal, and the sound of the center point of the table surface is the real effective speed.
3.3.8 The table surface is in the working state, and the leakage
The starting table system excitation device is in the working state, and the maximum value of the loss field on the plane above the working table surface is present. 3.3.9 The maximum sound Jeveloftadiationnoise is within the specified frequency range, and the standard table is the noise level of the radiation noise when the large amplitude vibration starts, 3.310 The installation diameter calculation moumugalrularinn The test sample installed on the centrifugal closed-chamber test machine has a constant rotation radius at the specified value. 3.3.11 Rotational compensation: The ability of the upper table to maintain a constant rotation speed when the high-speed test machine is subjected to a specified acceleration test. It is expressed as a percentage of the rotational change within the specified time.
2 Verification case
4.1 Inflatable mold partswwW.bzxz.Net
- The test standard atmospheric conditions specified in Article 5.3 of G2421 are: a. Temperature: -5--315 ℃
For source climbing: 4575%:
Air pressure.86~106kPa
For large-scale or benzene systems, the fast speed cannot be inspected in the upper and lower sections. The household standard gas is always within the inspection. When the relevant version is required, the most stringent control environment policy is required, and the sound is observed separately in the standard. 4.2 Mountain source conditions
Self-falling blood E
. Power supply and allowable difference 225+22V.380+38V power supply and allowable error 5C ±3.Hz
4.3 Use Water Conditions
4.3.1 Cooling water - Generally, the cooling water shall meet the following requirements
a. Inlet water humidity: 5~30℃:
b. Inlet water pressure: 1~U.MP
4.3.2 Humidification water
Distilled water or ionized water, other main volume shall not be less than 500m 4.4 Other conditions are as follows
There shall be no strong impact, vibration, magnetic field and corrosive gas around the equipment: a. Avoid direct sunlight or other cold and heat sources. 5 Calibration Instruments
5.1 The measurement error of the calibration system shall not exceed one third of the allowable deviation of the measured parameter. 4
GB/T 5170.1-1995
5.2 Secondary meters and secondary instruments shall be calibrated by the company and shall have the verification certificate within the valid period of the legal metrology equipment. 6 Verification cycle
6.1 Equipment in normal use and various meters attached to the equipment shall be calibrated at least once a year or once every two years (for equipment every year, for gas equipment every year).
6.2 Calibration shall be carried out immediately after the repair or replacement of important parts of the equipment (parts that have a direct impact on the test conditions). 6.3 Equipment shall be calibrated after installation and commissioning or before it is closed to new use. The verification shall be carried out in accordance with the following requirements: Generally, the equipment shall be calibrated under the condition of exposure to the environment and under the condition of variable load. The verification shall be specified in the report. When the equipment is calibrated under the condition of exposure to the environment, the specific load shall be selected from the corresponding test products. The simulated load of the climate test chamber shall comply with the relevant provisions of GB11158. The simulated load of mechanical equipment shall be specified in the corresponding equipment verification method. Note: When verifying new equipment, the simulated load can also be selected by the light or light equipment verification method. 8.1 The appearance and safety requirements of the equipment to be inspected shall be intact, and the equipment model, main performance indicators, production name, production year, month and daily average rate shall be clearly marked. 8.2 The whole set of meters, setting instruments and indicating instruments of the equipment to be inspected shall not have obvious defects that affect the performance. The error shall meet the requirements of the relevant product standards. 8.3 Various safety alarm protection devices of the equipment to be inspected shall work properly. After it is determined that the equipment to be inspected basically meets the above two conditions, the equipment shall be calibrated. 9 Adjustment, calibration and verification records of the test chamber 9.1 Adjustment of the test chamber 9.1.1 During the verification process, if it is found that the upper limit of the environmental parameters of the working space of the test chamber exceeds the allowable deviation value, it should be checked whether the value of the environmental parameters deviates from the nominal value. If it deviates from the nominal value, the test chamber should be adjusted. 9.1.2 The adjustment value is calculated as follows (represented by leakage): AT, = T, -TN
In the formula, ,—temperature field adjustment value,
——temperature field median value,
——temperature field nominal value.
If ,, it means that the temperature field is too low and the temperature needs to be adjusted to a lower value. If ,C, it means that the temperature is too low and the temperature needs to be adjusted to a higher value.
9.1.3 After adjustment, test the temperature deviation again: At this time, the value of the temperature deviation is large and is on both sides of the nominal value. The test device The required filling difference should not be avoided, otherwise it will be rejected. 9.1.4 The adjustment method of other environmental parameters is the same as that of temperature. 9.2 During the correction of the frequency (rate) indicating instrument of the test box (room), if it is found that there is a fixed difference between the actual measured value of the test box (room) working room environment and the indication of the equipment standard meter, and this difference is greater than the value required for the test (room 2), the indication of the equipment should be corrected and calculated as follows (with temperature as the representative): aT, = T. -T.
Where, T,—the positive value of the equipment indication meter, r——the median value of the equipment temperature field ℃ (test every 2min) (11)
CGB/T 5170.1-1995
T,——The arithmetic mean value of the temperature of the equipment indicating instrument within 30 minutes, (test every 2 minutes) The correction method of other environmental parameters is the same as that of the temperature cabinet. 9.3 Verification record sheet
When the equipment is verified during use, various verification items should be filled in the record sheet. The verification record sheet should be filled in with the inspected unit, the name of the inspected province, the product number, the manufacturer name, the equipment number, the model name of the verification instrument, the verification environment conditions, the verification parameters, the equipment definition table and the display, the verification case source data, the verification results, the verification date and the verification personnel's name, etc. 10. Processing of verification results
10.1. The equipment under test is qualified and 1. The error of the instrument system is not more than one third of the allowable deviation of the equipment under test. If the error of the instrument itself can be ignored, the deviation in the test result is mainly caused by the equipment under test. If the test result meets the relevant standards, it is judged as "qualified", otherwise it is unqualified". 10.2 Verification certificate-3. When the verification result is "qualified", a verification certificate should be issued. The verification certificate should use unified paper, be numbered, and be divided into two parts: "cover" and "content". 10.2.1 Verification certificate cover. The main parts of the verification certificate are as follows: Book number: Equipment name, model, production number, equipment number; clear conclusion!
Qualification, verification, approval personnel:
Official seal of the inspection unit:
Verification date, validity date.
10.2.2 Contents of the verification certificate
The contents of the verification certificate shall include the nominal value of the instrument, the indication value of the instrument, the correction value, the data of each test point, the verification results and the necessary control instructions.
In addition, the contents of the verification certificate shall also include the model and name of the instrument and the basis for verification and calibration. 0.3 Notification of calibration results
If the calibration result is classified as “unqualified”, the “calibration result notification”, “calibration result notification” and “calibration certificate” shall be in the following formats and should be filled out in detail.
10.4 Calibration marks
The calibration station shall use two labels: “qualified”, “approved for use” and “disabled”, and use “qualified certificate” (yellow), “approved for use” (yellow) and “disabled certificate” (red) to indicate the calibration status: “qualified”, “approved” and “disabled”. The calibration mark shall be affixed to the conspicuous positions of the equipment. Calibration mark The exact reason is as follows: Marking method
Complete the inspection certificate?
All the inspections are required to be completed
Fill in the certificate of assurance)
1. Technical specifications are unclear or there is no inspection procedure 2. According to the specified quality! Partially meet the requirements of both, and the whole 2. Equipment is not sent according to the specified but needs to be recognized as normal and considered qualified (limited use> specification limit week
10.5 Special situation handling
3. Self-made equipment, after "adjustment" or "comparison" applicable to stop the ear certification
(Fill in the notice of quick determination)
1. Equipment that has failed the inspection
2. Light equipment that is temporarily unavailable
3. Special equipment
1. Equipment that has exceeded the inspection period
When the inspection results of individual parameters or individual concession points of the inspected equipment cannot meet the requirements of technical indicators, the following methods shall be used for processing: 5
GB/T5170.1-1995
It is not allowed to appropriately reduce the working space of the inspected equipment. The working space after reduction All technical indicators should be met, but no restrictive instructions should be given in the verification certificate.
Additional instructions,
This standard was proposed by the Ministry of Electronics Industry of the People's Republic of China, and this standard was jointly issued by the Fifth Institute of the Ministry of Electronics Industry, the Northwest Machinery Factory, the Guangzhou Electric Science Research Institute, and the Shanghai Industrial Automation Research Institute.
The technical standard was first issued in August 1985 and first ordered in April 2015.
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