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25 Expelled parts4 Q$ ?' m5 |) `/ K4 P3 b( _
25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided.. w3 x% T) G9 y% k
Compliance is checked by inspection for the presence of protective means.: u3 K$ C8 }7 Z
25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be
5 ]6 a: i' u+ wintrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the s8 ], I5 Y ~' |
EQUIPMENT shall provide adequate protection against the effects of an implosion of the tube.
+ K: M1 D. R- S1 L( cA non-intrinsically safe tube shall be provided with an effective protective screen which cannot be7 a+ v$ P5 V4 t+ m8 T! K! [ T
removed without the use of a TOOL; if a separate screen of glass is used, it shall not be in direct contact; l$ u9 ]& S& {2 G0 c# X
with the surface of the tube.
8 L; a+ N, ^" v, g( ~The tube shall be tested as specified in IEC Publication 65, unless a certificate of the testing is provided. |
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