This standard specifies the verification items, verification instruments, location and number of measuring points, verification steps, and processing of verification data and verification results of salt spray test equipment. This standard is applicable to the periodic verification of salt spray test equipment used in GB/T 2423.17 "Basic Environmental Test Procedures for Electric and Electronic Products Test Ka: Salt Spray Test Method" and GB 2423.18 "Basic Environmental Test Procedures for Electric and Electronic Products Test Kb: Alternating Salt Spray Test Method (Sodium Chloride Solution)". This standard is also applicable to the periodic verification of similar equipment. GB/T 5170.8-1996 Basic Parameter Verification Methods for Environmental Test Equipment for Electric and Electronic Products Salt Spray Test Equipment GB/T5170.8-1996 Standard Download Decompression Password: www.bzxz.net

1CS19.040
National Standard of the People's Republic of China
GB/T 5170. 8-1996
Inspection methods for basic paramelers of environmentaltesting eguipments for eleceric and electronic productsSaltmisttesting eguipnents
Published on December 13, 1996
Implemented on November 1, 1997
Published by the State Bureau of Technical Supervision
GB/T 5170.B-1996
This standard is one of the three series of standards for inspection methods of basic parameters of environmental testing equipment for electrical and electronic products in GB/T517C. This mark is a revision of B17C.8B5, and the main technical changes are as follows: It is clarified that this mark is applicable to the periodic verification of environmental test equipment during use, to distinguish it from the product's professional test and factory inspection.
The number of points and the location of the report should be based on the area of ​​the equipment studio 2m "as the boundary, no more than 2 hours as 9 points, more than 2 hours as 5 points.
The temperature deviation is 31 mir. every 24 hours. This standard is implemented by the Ministry of Machinery Industry.
This standard is under the jurisdiction of the National Technical Committee for Environmental Testing of Electrical and Electronic Products: This standard is drafted by the Guangzhou Institute of Mechanical Engineering of the Ministry of Machinery Industry. The main drafters of this standard are Xie Lianhua, Wenru, Chen Xuejin, and the Ministry of Machinery Industry. 1 Scope
National Standard of the People's Republic of China
Basic parameters verification method of environmental test equipment for electrical and electronic products Test equipmentbzxz.net
Inspection nethods for basic parameters of environmental testing equipment for electrical and electronic products -Salt mist testing equlpmenlsGB/T 5170.B—1996
Replaces GD5170.E-95
This standard specifies the verification items, verification instruments, determination steps and quantity of measuring points for salt spray testing equipment, as well as the processing and verification results of verification data.
This standard is applicable to GB/T2423.17 Basic environmental test procedure for electrical and electronic products Test Ka: Salt spray test method> and GB2425.18 Basic environmental test procedure for electrical and electronic products Test Kb, alternating salt spray test method (subsection "Chemical test"
This standard specifies the periodic inspection of the following equipment. For the periodic inspection of the thermal test equipment used in the alternating salt spray test, see GB/T 517C.3.2 Referenced Standards
The following standards contain relevant documents. The referenced documents in this standard constitute relevant documents. At the time of publication of this standard, all relevant versions are valid. All standards are subject to revision. Therefore, parties to this standard should consider the possibility of using the latest versions of the following standards. GB/T 2423. 17—U3 Basic environmental test procedures for electrical and electronic products, Test KR Test method GB2123.18-8 Basic environmental test procedures for electrical and electronic products Test Kb: Air fog test method (chlorinated ... .1 The temperature measuring device adopts a temperature sensor composed of a platinum electrode, a thermocouple or other temperature sensors. The system accuracy is 70.2℃, and the thermal band number of the sensor is not more than 205.
4.2 Sedimentation measuring device
The salt sedimentation measuring device consists of the following two parts: 100mm diameter glass slide:
Approved by the State Technical Supervision Bureau on December 13, 1996 and implemented on November 1, 1997
A container with a capacity of 50mL.
5 Verification conditions
GD/T 5170.8-1996
5.1 The appearance and safety conditions of the equipment under inspection shall comply with the requirements of Chapter a of GB570.110S5. 5.2 The test climate and environmental conditions, energy conditions and water conditions shall meet the requirements of Chapter 4 of GB570.110S5. 5.3 The verification shall be carried out under the condition of under-load of the equipment under inspection. The verification load of the thermal test equipment shall be 50mm×1cmm×(1~2>mm), and the number shall be not less than 1 piece per square meter of the cross-section of the working space.
6 Measurement points and installation
6. 1 Group of rate measurement points
6.1.1 In the working room of the equipment to be determined, determine the upper, middle and lower horizontal layers (called upper, middle and lower layers). The upper layer is 1/10 of the workpiece height when it is connected to the top surface of the workpiece. The middle layer passes through the geometric center point of the upper workpiece. The lower layer is 10m above the bottom frame. E.1.2 Measurement point location -F. The middle and lower layers are as shown in Figure 1 and Figure 2. 6.1.3 When the area of ​​the working room is not more than 2m, there are 9 points, as shown in Figure 1. The measurement point is located at the center of the working room (or at an appropriate distance from the spray tower). The distance between other measurement points and the inner wall of the test equipment is 1/9 of their length, but not less than 0mm. 6.1.4 When the working room area is greater than 2m, there are 15 measurement base points, as shown in Figure 2.
The measuring point is the geometric center of the upper, middle and lower positions respectively. The distance between other measuring points and the inner wall of the test equipment is 1a of their respective sides, but not less than 50mm.
FA/T 517.8- 1996
6.1.5 If the data obtained at a certain measuring point does not meet the requirements, the distance between the measuring point and the reference point can be appropriately relaxed, but it shall not be recorded in the verification report.
6.2.1 When the working area is not more than 2m, there are 5 measuring points. Except for the center point, the distance between other points and the inner wall of the test equipment is 150m, as shown in Figure 3. When the center position needs to have a spray tower, the center point can be appropriately 4 meters away from the spray tower.
6.2.2 When the working area is greater than 2m, the measuring point There are 9 points, except for the center point 5. The distance between other points and the whole range is 17mm, as shown in Figure 4. When a spray tower is installed in the center, the center point can be at a certain distance from the spray tower. 6.2.3 The funnel is located at the measuring point. The height of its upper plane and the upper surface is 1/3 of the working temperature. 7.1 Temperature deviation measurement 6) Install the temperature sensor at each temperature measuring point, 6) Distribute the calibration load evenly in the working curve. c) Make the test equipment humid and spray continuously. d) After all the blue sensors reach 3:%℃ and remain within the specified tolerance range, measure the temperature value of the gold measuring point once every 2 minutes within 30min, for a total of 15 times, and record them. 7.2 Measurement
) Fix the glass tube through the case and place it on the mother node at the position of the measuring point shown in Figure 8 and Figure 4. b) Raise the temperature of the test equipment by 35℃ ± 2℃, and continue spraying for 16h. ) Take out the sample immediately after the spraying stops, and record the amount of culture solution collected. Data processing and inspection conclusion
B.1 Cultivation deviation
a) Correct the measured data of 7.1d) according to the positive value of the measuring device. 6) Calculate the temperature deviation according to the following formula:
Where AT
Upper temperature deviation. Center:
Lower temperature deviation,;
GB/T 57.B—1996
A'.,T..-T.
AT... -T... -Th
T, the maximum temperature obtained in the first measurement,: T.., the effective minimum temperature in the first measurement.℃; TN—standard ideal temperature,
8.2 Disk fog machine precipitation rate
Calculate the salt precipitation rate of the measuring point according to the following formula: Where,——salt fog precipitation rate mL/
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