GB/T 5170.20-2022 in English
VALIDInspection methods for environmental testing equipments—Part 20：Water testing equipments
- Issued on:2022-07-11
- Implemented on:2023-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$272.00
《GB/T 5170.20-2022环境试验设备检验方法 第20部分：水试验设备》由TC8（全国电工电子产品环境条件与环境试验标准化技术委员会）归口，TC8SC2（全国电工电子产品环境条件与环境试验标准化技术委员会气候环境试验分会）执行，主管部门为国家标准化管理委员会。
Introduction
Technical evolution and core changes of standards
| Version comparison dimensions | 2005 version | 2022 new version |
|---|---|---|
| Instrument categories | 4 types of special testing equipment | 6 types of tools such as needle gauges and type gauges were added |
| Inspection item coverage | 16 items of rigid component inspection | Expanded to 19 items of physical quantity inspection |
| Water pressure accuracy requirements | ±2%FS | ±0.1 grade pressure instrument |
Analysis of key points for inspection implementation
Verification method for dripping test equipment
In the stage of watering accuracy calibration, the new standard explicitly requires the use of the three-coordinate point arrangement method:
- When the splashing area is ≤2㎡, 5 measuring points should be arranged
- When the equipment is ＞10㎡, the nine-square grid topology structure should be used for point arrangement
Implementation case: Droplet size calibration
When testing the QD-600 shower box, the following is adopted: Color spot filter paper method compared with J According to JF standard, the particle size distribution D₅₀=2.8±0.06mm was measured at the 800mm spacing point, which meets the nominal value requirement of 3.8mm in GB/T2423.38.
Key parameter inspection specifications
| Inspection items | Allowance deviation | Measuring equipment |
|---|---|---|
| Rainfall intensity | ±0.05mm/min | Laser rainfall intensity sensor |
| Drip nozzle diameter | 4±0.04mm | Needle gauge set |
| Water temperature fluctuation | ±0.2℃ | Contact temperature recorder |
Equipment operation and maintenance practice guide
Annual verification cycle requirements
For key components such as |Salt spray chamber|Waterproof accessories, it is necessary to perform: Quarterly preventive calibration:
- Core measurement parameters must be inspected annually
- Functional verification is required within 48 hours after modification
- If the test hours exceed 5,000, the cycle will be shortened to 6 months
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