Description
The test is made using one of
the two test device described in figure 4 and in figure 5 in
accordance with the relevant product standard.
a) Conditions when using the test
device as in figure 4(oscillating tube)
the total flow rate is
adjusted as specified in table 9 and is measured with a flow
meter.
The oscillating tube is
provided with spray holes over an arc of *0°either side of the
centre point. The support is not preforated.
The enclosure to be tested is
placed at the centre point of the semicircle. The tube is caused to
oscillate through an angle of **0°, *0°on either side of the
vertical, the time for one complete oscillation (2 x **0°)being
about 4s and the test duration being 5 min.
The enclosure is then turned
through an horizontal angle of *0°and the test is continued for a
further 5 min.
The maximum acceptable radius
of the oscillating tube is ***0mm.
If for certain types of
apparatus it is not possible to wet all parts of the enclosure
undere test, the support of the enclosure may be moved up or down.
The hand-held test device as in figure 5(spray nozzle) should be
used as a preference in such cases.
