防護試驗 - IPX4

Test for second characteristic numeral 4 with oscillating tube or spray nozzle

The test is made using one of the two test devices described in figure 4 and in figure 5 in accordance with the relevant product standard.

Conditions when using the test device as in figure 4 (oscillating tube):
The oscillating tube has spray holes over the whole 180” of the semicircle. The total flow rate is adjusted as specified in table 9 and is measured with a flow meter.
The tube is caused to oscillate through an angle of almost 360°, 180° on either side of the vertical, the time for one complete oscillation (2 × 360°) being about 12 s.
The duration of the test is 10 min.
If not specified otherwise in the relevant product standard, the support for the enclosure under test is perforated so as to avoid acting as a baffle and the enclosure is sprayed from every direction by oscillating the tube to the limit of its travel in each direction.