UL 61965
Mechanical Safety for Cathode Ray Tubes

DETAILS
Edition Number:2SCC Approved:--
Edition Date:2004-07-27DOD Approved: --
Price Code:FANSI Approved: 2019-05-09
Type:uliec

  • SCOPE

    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 have integral protection with respect to the effects of implosion.

    These requirements apply to CRTs intended for use in apparatus including electrical and electronic measuring and testing equipment, information technology equipment, medical equipment, telephone equipment, 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 the enclosure for the apparatus. The test methods do not apply to CRTs which are protected by separate safety screens.

    A CRT covered by this standard is intended to be installed in an enclosure designed both to protect the rear of the CRT against mechanical or other damage under normal conditions of operation and to protect the 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 implosion protection systems providing protection against the hazards of particles expelled forwards beyond the face. 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 large and small CRTs are given in Clause 3.

    NOTE This set of requirements replaces the current requirements for the mechanical safety of cathode ray tubes (CRTs) as described in IEC 60065 (clause 18), which will be modified accordingly.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
    • UL Preface
    • Deviations
    • IEC Foreword
    • IEC Introduction
      • MECHANICAL SAFETY OF CATHODE RAY TUBES
        • Section
          • 1 Scope
          • 2 Normative references
          • 3 Definitions
          • 4 General Requirements
            • 4.1 Corrosion protection
            • 4.2 Mechanical damage
            • 4.3 Handling
            • 4.4 Film coated CRTs
          • 5 Environmental Conditioning
            • 5.1 Standard atmospheric conditions for testing
            • 5.2 Preconditioning
            • 5.3 Thermal conditioning
          • 6 Sampling
            • 6.1 Sampling plans
            • 6.2 Sample numbers
            • 6.3 Compliance
          • 7 Test Preparation and Set-up
            • 7.1 Scratch patterns
            • 7.2 Barriers
            • 7.3 Mounting
            • 7.4 Mounting position
          • 8 Testing of Large CRTs
            • 8.1 Mechanical strength (ball impact test)
            • 8.2 Implosion test (missile)
            • 8.3 Implosion test (thermal shock)
            • 8.4 High-energy impact test
          • 9 Testing of Small CRTs
            • 9.1 Mechanical strength (ball impact test)
            • 9.2 Implosion test (high ball)
            • 9.3 Implosion test (thermal shock)
            • 9.4 High-energy impact test
          • 10 Testing of Prestressed Banded CRTs with Protective Film
            • 10.1 General
            • 10.2 Film scoring pattern for CRTs with protective film
            • 10.3 Peel test
            • 10.4 Immersion test
          • 11 Marking
          • 12 Application Notes for Pre-stressed Banded CRTs with Protective Film
          • 13 Normative Requirements for the Use of Tables and (prestressed banded CRTs)
            • 13.1 Sampling plan I: New construction
            • 13.2 Sampling plan II: New construction with known resin or tape
            • 13.3 Sampling plan III: Tension band and alternative tension band
            • 13.4 Sampling plan IV: Alternative construction
          • 14 Normative Requirements for the Use of Tables and (prestressed banded with protective film)
            • 14.1 Sampling plan I: New construction
            • 14.2 Sampling plan II: New construction with known resin, tape, film or adhesive
            • 14.3 Sampling plan III: Alternative tension band
            • 14.4 Sampling plan IV: Alternative construction
          • 15 Alternative Thermal Conditioning for Use with Tables and (prestressed banded with protective film)
            • 15.1 Additional peel force requirements where alternative thermal conditioning is to be performed
            • 15.2 Tensile strength test where alternative thermal conditioning is to be performed
          • 16 Normative Requirements for the Use of Tables and (bonded frame CRTs)
            • 16.1 Sampling plan I: New construction
            • 16.2 Sampling plan II: Alternative construction
          • 17 Normative Requirements for the Use of Tables and (Laminated CRTs)
            • 17.1 Sampling plan I: New construction
            • 17.2 Sampling plan II: Alternative construction
        • Tables
        • Figures
    • Annex A(informative)Background to the development of this standard
    • Annex B(informative) Velocity and potential force of glass particles expelled from a CRT subjected to a ball impact – Ballistic and statistical calculations