JC/T 673-1997Performance test method for electric heating glass of rear auto window (English PDF)
汽车后窗电热玻璃性能试验方法
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Issued by
State Bureau of Building Materials Industry
Level / Type
Industry · Recommended
Issue date
August 5, 1997
Implementation date
January 1, 1998
Scope
JC/T 673-1997 is the English-translated version of 汽车后窗电热玻璃性能试验方法.
JC/T 673-1997 sets out how to test the electrically heated glass of car rear windows - the glazing with heating wires that clears mist and frost. Glass makers and vehicle manufacturers use it in design verification and in production, so that the optical quality, electrical performance and durability of a heated backlight are measured the same way by supplier and buyer. It covers sixteen tests: transmittance, opacity rate of the heating lines, resistance to cleaning agents, welding strength and bending resistance of the electric insert (the terminal welded to the bus bar), power, defrosting efficiency, overvoltage resistance, hot spot temperature, electrothermal impact, salt spray, wear of the heating wire, moisture resistance, durability, impact resistance and fragment state. It defines opacity rate, heating zone and electric insert, and refers to the GB 5137 test methods for automotive safety glazing. Issued by the State Bureau of Building Materials Industry on 5 August 1997, it has applied since 1 January 1998.
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Document preview — JC/T 673-1997
National Standard of the People's Republic of China
Issued by: State Bureau of Building Materials Industry
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms
- 4 Samples
- 5 Environmental conditions
- 6 Transmittance test
- 7 Opacity rate test
- 8 Resistance test to cleaning agent
- 9 Welding strength test of electric insert
- 10 Bending resistance test of electric insert
- 11 Power test
- 12 Defrosting efficiency test
- 13 Overvoltage resistance test
- 14 Hot spot temperature test
- 15 Electrothermal impact resistance test
- 16 Salt spray resistance test
- 17 Wear resistance test of electric heating wire
- 18 Moisture resistance test
- 19 Durability test
- 20 Impact resistance test
- 21 Fragment state test
Foreword
This document was issued on 5 August 1997 by the State Bureau of Building Materials Industry, and has applied since 1 January 1998.
It is a JC/T standard: a recommended industry standard of China's building materials industry, which covers glass.
1 Scope
This standard specifies the test methods for transmittance, opacity rate, resistance to cleaning agent, welding strength of electric insert, bending resistance of electric insert, power, defrosting efficiency, overvoltage resistance, hot spot temperature, electrothermal impact resistance, salt spray resistance, wear resistance of electric heating wire, moisture resistance, durability, impact resistance and fragment state of electric heating glass for automobile rear windshield, and is applicable to performance testing and design verification of various types of automobile electric heating glass.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, all editions cited are valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB 776-76 Electrical indicating measuring instruments - General specification
JC/T 632-1996 Road vehicles - Safety glazing materials - Terminology
GB 5137.1-1996 Road vehicles - Safety glazing materials - Test methods for mechanical properties
GB 5137.2-1996 Road vehicles - Safety glasses - Test methods for optical properties
3 Terms
3.1 opacity rate: ratio of the opaque area caused by electric heating wire to the area of the entire heating zone on the electric heating glass
3.2 heating zone: a closed surface formed by the topmost and the nethermost electric heating wires and one of the left and right bus bars respectively
3.3 electric insert: a metal sheet that is welded to the bus bar of the electric heating glass and connected to power supply
Remaining clauses in the full document
- 4 Samples
- 5 Environmental conditions
- 6 Transmittance test
- 7 Opacity rate test
- 8 Resistance test to cleaning agent
- 9 Welding strength test of electric insert
- 10 Bending resistance test of electric insert
- 11 Power test
- 12 Defrosting efficiency test
- 13 Overvoltage resistance test
- 14 Hot spot temperature test
- 15 Electrothermal impact resistance test
- 16 Salt spray resistance test
- 17 Wear resistance test of electric heating wire
- 18 Moisture resistance test
- 19 Durability test
- 20 Impact resistance test
- 21 Fragment state test
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 11 pages — is available in the English PDF.
Referenced standards
Normative references
GB 776-76 Electrical indicating measuring instruments - General specification · JC/T 632-1996 Road vehicles - Safety glazing materials - Terminology · GB 5137.1-1996 Road vehicles - Safety glazing materials - Test methods for mechanical properties · GB 5137.2-1996 Road vehicles - Safety glasses - Test methods for optical properties
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