符合iec60529标准关于ip5x,ip6x防尘测试要求. 
本试验符合iec 60529 / 1989-11 § 13.1 table vii fig. 2,标准要求，用于测试“防尘保护型“ip5x ”和“吸尘型” ip6x。 
测试设备：实验在一个带有密封内阁的沙尘箱内进行，通过空气流将滑石粉暂时保存在里面。并且 
通过一个网孔尺寸为0.075 mm的滤网流出。通常滑石粉为每立方米2千克。
PTL Dust Test Chamber
for checking the protection against solid foreign objects to verify the de-
grees of protection IP5X "Dust-protected" and IP6X "Dust-tight"
according to IEC 60529 :2001-02 § 13.1 Table VII Fig. 2.
Sense and purpose
Enclosures with the degree of protec-
tion IP5X "Dust-protected" do not have
to prevent ingress of dust totally. How-
ever dust should not penetrate in an
amount sufficient to interfere with the
satisfactory operation of the equipment
enclosed or to impair safety.
In the case of enclosures with degree of
protection IP6X "Dust-tight", it is neces-
sary to prove that no dust can penetrate
into the inside of the enclosure.
Test equipment
The tests are carried out by means of a
dust chamber with a sealed test cabi-
net, in which talcum powder is kept in
suspension by means of an air stream.
The talcum powder must be prepared in
such a manner that it will pass through
a sieve with a mesh size 0,075 mm.
The quantity of talcum given in the regulation is 2 kg per cubic metre test cabinet volume.
Test procedure
The enclosure under test is suspended in the test cabinet and connected to a vacuum
pump. This produces inside the specimen a depression of maximum 2 kPa = 20 mbar
(= approx. 200 mm water column) below atmospheric pressure.
The test is completed after 2 hours, if within 2 hours 80 to 120 times the air volume of the
specimen has been drawn through.

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