16750-4图4飞溅水试验射流不锈钢试验装置
5.4.2泼水试验
5.4.2.1测试方法
在TMAX热空气烘箱中将DUT加热到指定的保温时间。然后用冰水将DUT喷洒3秒。如果DUT只从一个方向在车辆中飞溅，则仅在DUT处于安装位置时才从这个方向飞溅。如果设备在车辆的各个方向上飞溅，则应考虑这些方向。在这种情况下，为每个飞溅方向使用新的DUT。在DUT上的飞溅宽度总是大于DUT的宽度。如果要溅起的DUT证明对于一个喷嘴来说太大，那么安排几个喷嘴在一排对DUT产生一系列溅起的冲击。请参阅图4至图6。
测试参数包括：
周期数：100；
保持时间，Th，TMAX：1小时，直到达到DUT温度稳定；
转变持续时间：＜20秒（用于DUT在温度存储和飞溅之间的手动转换）；
测试流体：去离子水；
水温：0°C～+4°C；
水流量：每3秒3 L至4 L（溅水持续时间）；
射流与DUT表面之间的距离：（325±25）mm（应在DUT的整个宽度上施加水）；
操作模式：见图5；
对DUT的定位：如在车辆中。
16750-4 Figure 4 Stainless Steel Test Set - Up For Splash Water Test Jet
5.4.2 Splash water test
5.4.2.1 Test method
Heat the DUT in a hot air oven at Tmax for the specified holding time,th. Then splash the DUT with ice water for 3 s. If the DUT is splashed in the vehicle from only one direction, splash it from this direction only while it is in an as-installed position. If the equipment is splashed from various directions in the vehicle, then these directions shall be taken into account. In this case, use a new DUT for each splash direction. The width of the splash directed at the DUT shall always be greater than the width of the DUT. If the DUTs to be splashed prove too big for one jet, arrange several jets in a row to produce a line of splash impact on the DUT. See Figures 4 to 6.
Test parameters include:
⎯number of cycles: 100;
⎯holding time,th, at Tmax: 1 h or until DUT temperature stabilization is reached;
⎯transition duration:<20 s (for manual transition of DUT between temperature storage and splashing);
⎯test fluid: de-ionized water;
⎯water temperature: 0 °C to +4 °C;
⎯water flow: between 3 l and 4 l per 3 s (splash duration);
⎯distance between jet and DUT surface: (325±25) mm (water shall be applied over the complete width of the DUT);
⎯operating modes: see Figure 5;
⎯orientation of the DUT: as in the vehicle.