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25 Expelled parts2 R1 g# y4 ^( A+ V `
25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided.0 Q! W4 v. v0 }# m' Z$ j
Compliance is checked by inspection for the presence of protective means.. m3 b, t7 b; L. G* v& E
25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be
+ ^. X! }( k7 \, wintrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the
: }: ]1 I/ @0 AEQUIPMENT shall provide adequate protection against the effects of an implosion of the tube.: C; Z' U1 x' V6 n. L+ G
A non-intrinsically safe tube shall be provided with an effective protective screen which cannot be0 T5 X! l1 b! } l& o4 Z& n
removed without the use of a TOOL; if a separate screen of glass is used, it shall not be in direct contact t4 Y6 A* Q% V! c" b5 g" x
with the surface of the tube., S0 c# m" r$ b, j
The tube shall be tested as specified in IEC Publication 65, unless a certificate of the testing is provided. |
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