16750-4圖4飛濺水試驗射流不銹鋼試驗裝置
5.4.2潑水試驗
5.4.2.1測試方法
在TMAX熱空氣烘箱中將DUT加熱到指定的保溫時間。然后用冰水將DUT噴灑3秒。如果DUT只從一個方向在車輛中飛濺，則僅在DUT處于安裝位置時才從這個方向飛濺。如果設(shè)備在車輛的各個方向上飛濺，則應(yīng)考慮這些方向。在這種情況下，為每個飛濺方向使用新的DUT。在DUT上的飛濺寬度總是大于DUT的寬度。如果要濺起的DUT證明對于一個噴嘴來說太大，那么安排幾個噴嘴在一排對DUT產(chǎn)生一系列濺起的沖擊。請參閱圖4至圖6。
測試參數(shù)包括：
周期數(shù)：100；
保持時間，Th，TMAX：1小時，直到達到DUT溫度穩(wěn)定；
轉(zhuǎn)變持續(xù)時間：＜20秒（用于DUT在溫度存儲和飛濺之間的手動轉(zhuǎn)換）；
測試流體：去離子水；
水溫：0°C～+4°C；
水流量：每3秒3 L至4 L（濺水持續(xù)時間）；
射流與DUT表面之間的距離：（325±25）mm（應(yīng)在DUT的整個寬度上施加水）；
操作模式：見圖5；
對DUT的定位：如在車輛中。
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.