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magnified glass with a resolution of 0.1 mm , magnified glass , IEC Test Equipment
8.5.5.2 Test method
For the protection against the effects of a high pressure lamp
failure, the following test is performed as follows:
– lamp assemblies considered MS3 parts during field replacement are
tested separate from the equipment;
– lamp assemblies only considered MS3 parts during operation, may
be tested separately,or as normally installed in the equipment, or
both.
An explosion of the lamp is stimulated by mechanical impact,
electronic pulse generator or similar method. The lamp shall
operate for at least 5 min to obtain operational temperature and
pressure. To evaluate the rupture results for potential debris area
and particle size, the equipment or lamp assembly is placed on a
horizontal surface, and a dark sticky mat (or another adequate
method) of adequate size to capture the particles is placed near
the exhaust vent of the equipment. The equipment opening shall be
oriented to maximize potential for particles to be expelled from
the product horizontally across the dark sticky mat.
After the rupture, the glass particles generated are measured using
a magnified glass piece with a 0,1 mm resolution. The test shall be
conducted to simulate the worst case operating position specified
in the instructions.