GB/T 5170.5-1996 Basic parameter verification methods for environmental test equipment for electrical and electronic products - Wet heat test equipment
Some standard content:
ICS19.04D
National Standard of the People's Republic of China
GR/T.5170.5—1996
Inspection methods for basic parameters of environmentaltesting equipments for electric and electronic preductsDampheat testingeyuipments
Released on December 13, 1996
Implemented on November 1, 1997
Released by the State Bureau of Technical Supervision
G5170.5—1996
This standard is one of the GB/T5170 series of standards - Basic reference and verification methods for environmental test equipment for electric and electronic products. This standard is a combination of GB5170.5—35GB:775.685 and CB517U.?—85. Compared with the standard released in 1985, the technical content has the following changes: First, it is clarified that this standard is applicable to the weekly control of the test equipment during its service life, which is different from the type test of the product. The number and position of measuring points are based on the working space penetration of 2m. When the distance is not more than 2m*, there are 3 temperature measuring points, when it is more than 2m*, there are 15 temperature measuring points, and 4 relative temperature measuring points. The measuring time is much shorter. The constant humidity test equipment has increased the temperature uniformity and dynamic measurement disk, and increased the requirements for the external cooling characteristics of the alternating hot test equipment with a diagram. The average rise and fall rate is used to express the rise and fall root characteristics. The formula of
is used to express the temperature and humidity difference, the uniformity and dynamics are calculated, and the quantitative expression is used. The measurement results are shown in this standard. This standard is based on the standard B5170.8~517(.7-85). This standard is newly proposed by the rolling machinery industry. This standard was prepared by the National Electrical Products Environmental Testing and Environmental Testing Standardization Technical Conference. This standard was initiated by the Guangzhou Electrical Science Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are: Jianhua Wenchi, Chu Xuejin, Yi Zhenying, and Wang Dianhui. National Standard of the People's Republic of China
Basic parameter verification methods for environmental testing equipment of electrical and electronic products
Inspection methods for hasic paramelers of enrlronmental1esting equipments far elerctric and eleetronle producis-amp hent testing equipment
1 Scope
GP/T5170.5—1996
Replaced GB5170.5--5170.65
Technical standard specifies the test items, test receivers, test point locations and data records, test steps and test data processing and stability results of damp heat test equipment.
This standard is applicable to GB/T213S.3 Basic Environmental Test Procedure for Good Engineering Electronic Products Test A: Steady Heat Test Method, G R/T2423.4 Basic environmental test procedures for electrical products Test 6: Alternating heat test method 3. GB2123.99 Basic environmental test regulations for electronic products Test Cb: Equipment with certain virtual heat test methods GB2423.16 Basic environmental test regulations for electronic products Test method: Periodic inspection of equipment used for testing. This standard is also applicable to the later verification of similar equipment. 2 References to standards
The following standards contain the following provisions, which are referred to in this standard. The provisions of this standard: When this standard is published, the six versions shown are valid. All standards will be revised. All parties using technical standards should consider using the latest versions of the following standards as much as possible. B/T2423.3-1 Basic environmental test procedures for electronic products Test, constant humidity test method GB/3423.4-0 Basic environmental test procedures for electrical products Test Db: Alternating humidity test method GB2423.3-8% Basic environmental test procedures for electrical products Test Ch: Constant humidity test method for equipment Small method GB2123, 1G one is the basic environmental certification procedure for electrical products: long-term inspection method GB, T170.1 [S65 electrical T. Electrical F product environmental test setting basic test method general principles 6S99-86 environmental test relative source direct calculation table 3 verification items
should include:
temperature difference;
relative humidity deviation;
temperature uniformity:
temperature fluctuation:
temperature rise characteristics!
Wind speed,
Approved by the State Administration of Quality Supervision, Inspection and Quarantine on December 13, 1996, and implemented on November 1, 1997
4 Main devices and requirements for calibration
4.1 Temperature detector
CBT5170.51996
A temperature detector composed of main power bank, thermoelectric transformer and other temperature sensors. The system accuracy is +0.2℃, and the thermal time band of the sensor is not more than 2U5.
4.2 Relative temperature measurement receiver
Wet-bulb relative humidity measuring instrument with deep-sea resistor, thermocouple or other temperature sensor group, the range of wet-bulb meter is above o.1 center.
4.3 Wind measuring device
Use hot-bulb or hot-wire wind gauge or similar measuring instrument, the sensitivity should not be greater than 1.05m/s, 5 Verification items
5.1 The appearance and safety requirements of the qualified equipment shall comply with the general requirements of B/T5170.1-1995 Section 8, 5.2 The specified air model environment recording items, source killing items, water quality items shall meet the requirements of GB/T51791--2935 Section 1, 5.3 The test shall be carried out under the load conditions of the qualified equipment, and the verification load shall comply with GB/T5 171.1-1995 Article 7: 6 Number and location of measuring points
6.1 In the test equipment studio, the upper, middle and lower horizontal surfaces (referred to as main, middle and F) shall be determined. The height between the upper layer and the working surface is 1/10 of the studio height. The middle room passes through the working room. The center point is 0.1, and the lower layer is 10m above the bottom shelf. 6.2 These measuring points are located on the upper, middle and lower floors, as shown in Figure 1 and Figure 2. The temperature measuring points are represented by O, A, R, C, D, FF, G, HJ, K, L, M, N, and U. The relative temperature measuring points are represented by C, D, and F. 6.3 When the studio area is not more than 10m2, there are 3 temperature measuring points, and the relative temperature measuring points are 3 positions as shown in Figure 1. s.
The center of the measuring point is located at the geometric center of the working space. The distances between other measuring points and the test equipment are within 1/0 of their respective lengths, but not less than cmn.
6.4 If the working space is greater than 2m, there are 5 temperature measurement points and 4 filterability measurement points. The locations are as follows: 7. The measurement points E, O and center are located at the geometric centers of the third, middle and lower layers respectively. The distance between other points and the inner wall of the test equipment is 1/10 of the length and not less than 50m.
6.5 If the basic parameters of the working space measured do not meet the requirements of GB/T2423.3.G/T3423.4, G2423.D and 2423.16 and are related to the location of the measurement points, the distance may be increased to 1/10 of the distance specified in 6.4, but it should be recorded in the test report. 6.5 When the working space is greater than 50m, the number of filterability measurement points and humidity measurement points may be appropriately increased. 2
7 Steps
7.1 The distance between the relative humidity and heat test equipment and the relative humidity and heat test equipment is GB/T 5170.5-1996
Company) Install temperature sensors at each measuring point specified in the 6th Beijing. b) Place the calibration load or install it in the working space
c) Measure the relative temperature of the measuring point (applicable to B242.3 test Ca) or the test speed of all test points (applicable to Gn243.9 test Ch, test heat release test column) d) Rise the temperature to 0°C. For GB2423.S., the heating rate shall not exceed 1/mm (the average value of more than 5min), and the temperature value of the center point shall be measured once every 5min, and the relative humidity shall be recorded.) Make the relative humidity reach the specified value within 2 hours
and keep it fixed. After that, measure the temperature and humidity of all reverse flux points every 2in for at least 30m! For a total of 15 times, and record them. 7.2 Alternating humidity and heat test equipment
1) Install the temperature sensor at the measuring point specified in the 6th step, 1h) Install the control box into the working space. ! Measure the relative humidity and wind speed when necessary. d) Make the temperature of the working space reach 25±3℃ and keep the relative humidity within 4575%. e) During the h period, the relative humidity of the working space shall not be lower than %. From this moment on, make the temperature and humidity of the working space as shown in Figure 2, and continue to change from high temperature to high humidity. During the heating stage, measure the temperature and humidity of the inner point (center) once every 5 minutes. After the high temperature and high humidity stage, measure the relative humidity of all other points every 2 minutes. The value is at least 31, and a total of 15 measurements: at high temperature and high humidity, that is, In the first 15 minutes before the start of the heat-avoidance stage, all measuring points should be measured once every 2 minutes. At the beginning of the cooling stage, the central point should be measured once every 15 minutes. The temperature and humidity of the working space should be measured once every 2 minutes until the temperature of all measuring points in the working space reaches 25=3℃ and the relative humidity is lower than 9, which means the working space enters the low temperature and high humidity stage. In the low temperature and high humidity stage, the temperature and humidity values of all measuring points should be measured every 2 minutes! For a total of 15 times, all the measurements should be recorded.
7.3 Test equipment
4) Install the temperature and humidity sensor at the measuring point specified in the table 6. 6> Install the fixed load into the working room.
) Measure the wind speed at the measuring point.
d) Make the temperature of the central point (0,0) of the working space reach 29℃ and the relative humidity is greater than %. ) After the temperature of the working space reaches the set state, start measuring the temperature of all measuring points once every 2 minutes for at least 3 hours, and measure 15 times in total, and record them. 8.1 Steady state sensible heat test equipment GB/T 5170.5-1996 8.1.1 Correct all the measuring data of 7.1) and 7.3e> to the positive value of the measuring instrument. According to the relative humidity value of the day, 8.1.2 Calculate the temperature according to the following formula:
Where: T
is the average temperature,
measurement times;
-Tru
The maximum temperature measured at each measuring point in the first measurement is the maximum temperature; the minimum temperature measured at each measuring point in the second measurement is the minimum temperature. B.1.3 Calculate the temperature deviation according to the following formula:
ATA =-Tw-T
- the upper difference,
lower difference, ℃
T - the maximum humidity measured at each measuring point in the second measurement, Te
The average humidity measured at each measuring point in the second measurement is the nominal humidity.
8.1.4 Calculate the temperature fluctuation according to the following formula:
AT. =± (T -T ..)/2
is the passive tracking humidity,
is the highest humidity measured by the center point in the second pool, Tn\ is the lowest humidity measured by the center point in the nth pool. B.1.5 Calculate the relative humidity deviation according to the following formula: u=H-Ha
DHn--H
Wherein: a
is the upper deviation of relative humidity, %;
is the lower deviation of relative humidity, %; Www.bzxZ.net
is the highest relative humidity measured by each test point in the monthly measurement, %H.. is the relative condensation rate measured by each test point in the second measurement, %H.
is the relative humidity of the standard pulse. 8.1.6 Calculate the wind speed according to the following formula: Where: VV.+V+...+V.*/(..V....x)-the wind speed at each measuring point. m/a) 8.1.7 Calculate the temperature rate according to the following formula (do not use the alternating humidity test equipment), =
rise rate,/min;
the required temperature change every 5 minutes, ℃
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RT5170.5-1996
8.1. The test results of each test station on the day are in accordance with the center K/12423 -3. GT32423.5 and 632423.16 have relevant requirements on temperature, relative humidity and wind speed.
82 alternating data test This equipment
B.2.1 can use measuring instruments to connect all the measurements in 7.2. According to GH699S, find out the humidity of the plate. 82.2 measures the temperature rise characteristics by line
a) according to GB/T2423.4 Figure 2, draw the allowable range of humidity change of the temperature stage (including 3ri before temperature rise and 30ntir after temperature rise).
) The temperature and humidity data of the center point measured in the temperature rise stage (including the temperature rise stage end point) are The data measured within a0min after the sheet is quickly put into the high temperature and high maintenance stage for 50min are plotted in the standard diagram of 8.2.2a, and connected by dotted lines to draw the temperature rise characteristic curve. 8.2.3 Draw the temperature reduction characteristic curve (
) According to the provisions of Figure 2 of GB/T2423.4, the temperature fluctuation data of the central point measured in the heating stage (including the center point before the start of heating and the center point after the end of heating) are plotted in the range diagram of 8.2.34, and the temperature rise characteristic curve is drawn by dotted lines. 8.2.4 Calculate the temperature accuracy
a) According to formula (2), (3), calculate the temperature deviation of the high temperature and high humidity stage and the low humidity stage; b) According to formula 5), calculate the relative humidity drop of the micro-temperature and high humidity stage and the low humidity stage. 8.2.5 Calculate the humidity deviation
According to formula (4), calculate the temperature deviation of the high temperature and high humidity stage and the low humidity stage. 9.2.6 Among the above test results, the relative humidity deviation and relative humidity deviation shall comply with the relevant provisions of GB/T2423.4. 1 The rising and falling characteristic curve shall be within the allowable variation range of humidity specified in Figure 2 of GB/T2423-4: the temperature rise curve shall continue to rise; the temperature drop curve shall be a continuous drop from the vertical line and shall not be jagged.5 Calculate the relative humidity deviation according to the following formula: u=H-Ha
DHn--H
Wherein: a
Relative humidity upper deviation, %:
Hshang-Relative humidity lower deviation, %:
H.-The highest relative humidity measured at each test point in the monthly measurement, %H..-The relative condensation rate measured at each test point in the second measurement, %H.
Relative buoyancy of standard pulse
8.1.6 Calculate the humidity according to the following formula:
Wherein:
VV.+V+...+V.*/
(..V....x)—wind speed at each measuring point. m/a) The effective unit of the product is
8.1.7 Calculate the temperature rate according to the following formula (do not use the alternating humidity test equipment), =
Rise rate,/min;
Required temperature change every 5 minutes, ℃
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RT5170.5—1996
8.1. The test results of each test station on the day are consistent with the center K/12423-3.GT32423.5 and 632423.16 for temperature, relative humidity and wind speed 82 Alternating data test This equipment B.2.1 can connect all the measured data in 7.2 with the measuring instrument. According to GH699S, find out the wet plate. 82.2 Measures are given for the heating characteristics by line control GB/T2423.4 Figure 2. Draw the allowable range of humidity change of the temperature stage (including 3ri before heating and 30ntir after heating). The temperature and humidity data of the center point measured in the heating stage (including 50ir after the heating stage) are immediately put into the high temperature and high protection stage. The data measured within a0min after the temperature drop are plotted in the standard diagram of 8.2.2a and connected by dotted lines to draw the temperature rise characteristic curve. 8.2.3: Draw the temperature drop characteristic curve (
) According to the provisions of Figure 2 of GB/T2423.4, the temperature fluctuation data of the central point measured in the temperature drop stage (including the center point before the start of temperature drop and the center point after the end of temperature drop) are plotted in the range diagram of 8.2.3a and connected by dotted lines to draw the temperature drop characteristic curve. 8.2.4 Calculate the temperature accuracy
a) According to formula (2), (3), calculate the temperature deviation of the high temperature and high humidity stage and the low humidity stage; b) According to formula 5), calculate the relative humidity drop of the micro-temperature and high humidity stage and the low humidity stage. 8.2.5 Calculate the humidity deviation
According to formula (4), calculate the temperature deviation of the high temperature and high humidity stage and the low humidity stage. 9.2.6 Among the above test results, the relative humidity deviation and relative humidity deviation shall comply with the relevant provisions of GB/T2423.4. 1 The rising and falling characteristic curve shall be within the allowable variation range of humidity specified in Figure 2 of GB/T2423-4: the temperature rise curve shall continue to rise; the temperature drop curve shall be a continuous drop from the vertical line and shall not be jagged.5 Calculate the relative humidity deviation according to the following formula: u=H-Ha
DHn--H
Wherein: a
Relative humidity upper deviation, %:
Hshang-Relative humidity lower deviation, %:
H.-The highest relative humidity measured at each test point in the monthly measurement, %H..-The relative condensation rate measured at each test point in the second measurement, %H.
Relative buoyancy of standard pulse
8.1.6 Calculate the humidity according to the following formula:
Wherein:
VV.+V+...+V.*/
(..V....x)—wind speed at each measuring point. m/a) The effective unit of the product is
8.1.7 Calculate the temperature rate according to the following formula (do not use the alternating humidity test equipment), =
Rise rate,/min;
Required temperature change every 5 minutes, ℃
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RT5170.5—1996
8.1. The test results of each test station on the day are consistent with the center K/12423-3.GT32423.5 and 632423.16 for temperature, relative humidity and wind speed 82 Alternating data test This equipment B.2.1 can connect all the measured data in 7.2 with the measuring instrument. According to GH699S, find out the wet plate. 82.2 Measures are given for the heating characteristics by line control GB/T2423.4 Figure 2. Draw the allowable range of humidity change of the temperature stage (including 3ri before heating and 30ntir after heating). The temperature and humidity data of the center point measured in the heating stage (including 50ir after the heating stage) are immediately put into the high temperature and high protection stage. The data measured within a0min after the temperature drop are plotted in the standard diagram of 8.2.2a and connected by dotted lines to draw the temperature rise characteristic curve. 8.2.3: Draw the temperature drop characteristic curve (
) According to the provisions of Figure 2 of GB/T2423.4, the temperature fluctuation data of the central point measured in the temperature drop stage (including the center point before the start of temperature drop and the center point after the end of temperature drop) are plotted in the range diagram of 8.2.3a and connected by dotted lines to draw the temperature drop characteristic curve. 8.2.4 Calculate the temperature accuracy
a) According to formula (2), (3), calculate the temperature deviation of the high temperature and high humidity stage and the low humidity stage; b) According to formula 5), calculate the relative humidity drop of the micro-temperature and high humidity stage and the low humidity stage. 8.2.5 Calculate the humidity deviation
According to formula (4), calculate the temperature deviation of the high temperature and high humidity stage and the low humidity stage. 9.2.6 Among the above test results, the relative humidity deviation and relative humidity deviation shall comply with the relevant provisions of GB/T2423.4. 1 The rising and falling characteristic curve shall be within the allowable variation range of humidity specified in Figure 2 of GB/T2423-4: the temperature rise curve shall continue to rise; the temperature drop curve shall be a continuous drop from the vertical line and shall not be jagged.
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