
ISO16750-4 Clause 4.2 Water Splash Test Chamber Simulating Thermal Shock Testing On Vehicle Caused By Ice Water
Purpose
The product used in the shallow water area of the vehicle simulates thermal shock testing caused by ice water. The purpose is to simulate the splashing of ice water into a heating system or component while driving on a wet road in winter. A failure mode is a temperature expansion coefficient that causes mechanical cracking or seal failure. Another additional failure mode, not covered in 5.3.3, is the reduction in tightness and water intrusion into systems or components.
There are two ways to perform the test (see sections 4.2 and 4.3)
Test
Heat the DUT (device under test) to a certain temperature max) and the specified time (hours) in an oven. Spray the ice water to the DUT for 3 seconds.
If the DUT is only splashed in one direction on the vehicle, it will only spray in the direction of the installation position. If the equipment is splashed in multiple directions on the vehicle, these directions should be stated, and each direction is tested with a new DUT. The width of the splash is always greater than the width of the DUT. If the size of the DUT that accepts splashing water is much larger than the single sprinkler head, multiple nozzles should be arranged to splash water into the DUT in rows.
Cycles | 100 |
The holding time of the specified temperature Tmax th | 1h or until the DUT temperature is stable |
Conversion duration | <20s (manual conversion between DUT storage temperature and splash temperature) |
Test liquid | Deionized water + 3% pure Arizona dust or 5% sodium |
Water temperature | 0~+4°C |
Water flow | 3L-4L/3s (jetting process) |
Spout to DUT distance | 325 ± 25mm (provided water should exceed the width of the DUT) |
Working mode (ISO16750-1) | See Figure 5 |
Direction of the DUT | Same as loading direction |
KingPo Technology Development Limited
Kingpo Technology Development Limited is a pioneer and leader of global safety testing equipment manufacturer.We offer one-stop service for worldwide labs from R&D,testing,production to after-sales service.We dedicate ourselves in achieving optimal production quality for our customers,reduce cost and enhance enterprise’s international competitiveness.
Kingpo is accredited by International Electrotechnical Commission(IEC) and becomes a nominated supplier and is officially issued a CBTL certificate.We are now among the world’s leading laboratory testing equipment manufacturer to produce the highest level and more standard testing equipment for global Electrotechnics labs becoming nominated supplier of NEMKO,UL,PHILIPS,CTK,CVC(Vkan Certification & Testing Co.,Ltd),Dongguan Quality Testing,China Household Electric Appliance Research Institute,Russia National Standard Institute,Belarus National Standard Institute,Korea National Standard Institute,etc.Lamp cap gauges and testing equipments produced by Kingpo,which are calibrated by CNAS and ilac-MRA ,have a high international reputation.
Kingpo aims at manufacturing world class testing equipment for Chinese labs,establishing an independent R&D center and introducing foreign state-of-the-art technology and international high-tech talents.Adopting a creative design concept,taking sensor data acquisition as forerunner,computer control technology as lead,imported transmission device with high accuracy and low noises,we have developed more than one hundred and sixty products.
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By means of excellent product competitiveness and complete service,our company has won numerous customers high praise and sincere trust.In complying with technical improvement and increased efficiency and quality assurance of these products ,we insist on providing high end products to market and dedicating to being a leader in testing equipment industry.