UL 61965:2009 free download Mechanical Safety for Cathode Ray Tubes
1 Scope
This International Standard is applicable to cathode ray tubes and cathode ray tube assemblies(hereinafter referred to as CRTs) which are intended for use as components in apparatus and which haveintegral protection with respect to the effects of implosion.
These requirements apply to CRTs intended for use in apparatus including electrical and electronicmeasuring and testing equipment,information technology equipment，medical equipment,telephoneequipment, television equipment and other similar electronic apparatus.
This standard is intended to apply only to those CRTs in which the face of the CRT forms part of theenclosure for the apparatus.The test methods do not apply to CRTs which are protected by separatesafety screens.
A CRT covered by this standard is intended to be installed in an enclosure designed both to protect therear of the CRT against mechanical or other damage under normal conditions of operation and to protectthe user against particles expelled in a backwards direction from the CRT face in the event of implosion.
This standard contains requirements for CRTs of 76 mm diagonal and larger that incorporate implosionprotection systems providing protection against the hazards of particles expelled forwards beyond theface.There is no intended protection against particles expelled in other directions.
Compliance is tested by subjecting CRTs to the test procedures and criteria which are given in clauses 8(large CRTs),9(small CRTs) and 10(CRTs with protective film) of this standard.The definitions of largeand small CRTs are given in Clause 3.
NOTEThis set of requirements replaces the current requirements for the mechanical safety of cathode ray tubes(CRTs) as described in lIEC 60065(clause 18), which will be modified accordingly.
2 Normative references
The following referenced documents are indispensable for the application of this document. For datedreferences,only the edition cited applies. For undated references,the latest edition of the referenceddocument (including any amendments) applies.
IEC 60065:2001
Audio,video and similar electronic apparatus – Safety requirements
lEC 60068-1:1988
Environmental testing – Part 1: General and guidance Amendment 1 (1992)
IEC 60216-1:2001
Electrical insulating materials – Properties of thermal endurance – Part 1: Ageing procedures andevaluation of test results
ISO 527-1:1993
Plastics – Determination of tensile properties -Part 1: General principles
ISO 527-3:1995
Plastics – Determination of tensile properties – Part 3: Test conditions for films and sheets
ISO 851 0-1 :1 990
Adhesives – Peel test for a flexible-bonded-to-rigid test specimen assembly – Part 1 : 90 degree peel 3 Definitions
For the purposes of this document the following definitions apply.
3.1 BONDED FRAME – System employing a preformed metal frame that covers the periphery of the CRT rim area. The space or void between the CRT rim and the metal frame is filled with resin or
equivalent. 3.2 CRT DIAGONAL – Nominal diagonal of the glass envelope at its maximum dimension (for example,mould-match line) excluding any hardware.
3.3 CRT ENVELOPE – Structure consisting of a face or faceplate, funnel and neck assembly.
3.4 DEVACUATION – Equalization of the pressure in a CRT relative to the ambient pressure.
UL 61965:2009 free download
