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GB/T 5137.2-2002 English PDF (GBT5137.2-2002)

GB/T 5137.2-2002 English PDF (GBT5137.2-2002)

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GB/T 5137.2-2002: Test methods of safety glazing materials used on road vehicles -- Part 2: optical properties tests

This Part of GB/T 5137 specifies the test method for the optical properties of safety glass used for road vehicles. This Part is applicable for the road vehicle safety glass (hereinafter referred to as safety glass). The safety glass includes glass products processed from all kinds of glass OR the combination of the glass and other materials.
GB/T 5137.2-2002
GB
ICS 81.040.30
Q 34
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
Replacing GB/T 5137.2-1996
Test Methods of Safety Glazing Materials Used
on Road Vehicles ?€?
Part 2. Optical Properties Test
(ISO 3538.1997, Road vehicles - Safety glazing materials - Test methods for optical properties, MOD)
ISSUED ON. DECEMBER 20, 2002
IMPLEMENTED ON. MAY 1, 2003
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People's Republic of China (AQSIQ)
Table of Contents
Foreword ... 3
1. Scope ... 5
2. Test Conditions ... 5
3. Test Application Conditions ... 5
4. Visible Light Luminous Transmittance Test ... 5
5. Secondary Image Deviation Test ... 7
6. Optical Distortion Test ... 11
7. After-fracture Visibility Test ... 15
8. Color Identification Test ... 16
9. Visible Light Luminous Reflectance Test ... 17
Annex A ... 21
Foreword
GB/T 5137 ?€?Test Methods of Safety Glazing Materials Used on Road Vehicles?€? is divided into four parts.
-- Part 1. Mechanical Properties Test;
-- Part 2. Optical Properties Test;
-- Part 3. Radiation, High Temperature, Humidity, Fire and Simulated Weathering Resistance Tests;
-- Part 4. Method for the Determination of Solar Transmittance.
This is Part 2 of GB/T 5237.
This Part of GB/T 5137 modifies and adopts ISO 3537.1997 ?€?Road Vehicles - Safety Glazing Materials - Test Methods for Mechanical Properties?€? (English Version). The main differences between this Part and the international standard include. -- the ?€?Definitions?€? in the international standard is deleted.
-- The impact position and schematic diagram of the "visibility test after fracture" are changed in accordance with that stated in GB 9656-2003.
This Part replaces GB/T 5137.2-1996 ?€?Road Vehicles - Safety Glazing Materials - Test Methods for Mechanical Properties?€?.
Compared with GB/T 5137.2-1996, the main changes of this Part are as follows. -- The "4. Luminous Transmittance Test" is changed into "4. Visible Light Luminous Transmittance Test".
-- 4.1 Test objectives of the visible light luminous transmittance is changed into. "to determine whether the safety glass has a certain visible light luminous transmittance".
-- 5.1 Test objectives of the secondary image deviation is changed into. "to determine the corner deviation between the primary image and the secondary image".
-- ?€?7. Test objectives of the visibility-after-fracture test?€? is changed into "7. Test objectives of the visibility-after-fracture test" [Translator note. In English, both words are the same].
-- The position and schematic diagram of the impact points are maintained to be Test Methods of Safety Glazing Materials Used on
Road Vehicles ?€?
Part 2. Optical Properties Test
1. Scope
This Part of GB/T 5137 specifies the test method for the optical properties of safety glass used for road vehicles.
This Part is applicable for the road vehicle safety glass (hereinafter referred to as safety glass). The safety glass includes glass products processed from all kinds of glass OR the combination of the glass and other materials.
2. Test Conditions
Unless otherwise specified, the test shall be carried out under the following conditions.
a) Environmental Temperature. 20??C??5??C;
b) Air Pressure. 8.60??104Pa ~ 1.06??105Pa;
c) Relative Humidity. 40% ~ 80%.
3. Test Application Conditions
For some kind of safety glass, if the test result can be predicted based on the known properties, then all experiments specified by this Standard are not necessary to be carried out [Translator note. All experiments might be
exempted].
4. Visible Light Luminous Transmittance Test
4.1 Test Objectives
This test is to determine whether the safety glass has a certain visible light luminous transmittance.
4.2 Specimens
The linearity of the receiver and the supporting display instrument shall be equal to within ??2% of the full-scale, or within ??10% of the reading
measurement range; the smaller value prevails.
4.4 Test Procedures
4.4.1 Before the specimen is placed in front of the light path, the indicated value of the receiver display instrument shall be adjusted to 100 scale-division. When there is no light on the receiver, the indicated value is deemed as zero. 4.4.2 The specimen shall be placed between A1 and A2, and have its direction adjusted so that the incident angle of the light beam is equal to 0????5??. 4.4.3 The visible light luminous transmittance of the specimen shall be measured. For each measuring point, the indicated value (n) on the display instrument shall be read. The visible light luminous transmittance (??r) is equal to n/100.
4.5 Result Expression
According to the above method, the visible light luminous transmittance (??r) shall be expressed by the measured value of any point.
4.6 Substitution Method
As long as the provisions in 4.3.3 are met, other methods that can get the same visible light luminous transmittance result can be adopted.
5. Secondary Image Deviation Test
5.1 Test Objectives
This test is to determine the angular deviation between the primary image and the secondary image.
5.2 Specimens
Front windscreen glass product.
5.3 Application Scope
Two testing methods may be adopted.
-- target test;
-- collimation telescope test.
White, yellow, red, green, blue and amber color-plates.
8.4 Test Procedures
The color-plates shall be observed through the test area of the specimen. 8.5 Result Expression
Determine whether the color of the plates seen from the windscreen is the primary color.
9. Visible Light Luminous Reflectance Test
9.1 Test Objectives
It is to determine the visible light luminous reflectance of the safety glass under the standard illuminant A (see Annex A).
9.2 Instruments
9.2.1 First-class Instrument. lab photometer or spectrophotometer with a high precision and integral sphere type, able to measure the specimen luminous reflectance under the measurement standard illuminant A conditions.
The geometrical (optical) conditions of the first-class instrument shall be one of the following.
a) Diffusion/vertical (d/0). the specimen is illuminated by the integral sphere diffusion. The included angle between the normal and the axis of the
measuring light beams shall not exceed 10??.
b) Vertical/diffusion (8/d). the specimen is illuminated by a light beam. The included angle between the light beam axis and the normal of the
specimen shall not exceed 8??. The integral sphere shall be adopted to
collect the reflected light flow.
The diameter of the integral sphere in the first-class instrument shall not be less than 100mm. The total area of the opening of the integral sphere shall not be greater than 10% of the sphere surface. The internal surface of the sphere shall be evenly coated with the high-diffusion reflection materials (visible light luminous reflectance greater than 95%) that is non-selective to the spectrum. 9.2.2 Second-class instrument. photometer having the precision lower than the first-class instrument, portable, able to measure the luminous reflectance of the safety glass of the standard illuminant A conditions, and able to calculate the measured value through 9.3.5.
Connect the circuit. When the light source and the detector are stabilized, the extinction trap is placed on the measurement hole of the reflection specimen. Adjust the visible light luminous reflectance value to be zero. Then, place the first-class standard specimen on the measurement hole.
Read the visible light luminous reflectance value from the instrument.
b) Calibration of Spectrophotometer
The calibration shall be made according to provisions of instrument.
9.4.2 Measurement of First-class Instrument
Indicate the second-class standard sample?€?s film-face and bending direction; place it on the measurement hole of the specimens; measure the visible light luminous reflectance.
9.4.3 Calibration of Second-class Instrument
Connect the circuit. When the light source and the detector are stabilized, place the extinction trap on the measurement hole of the reflection specimen. Adjust the visible light luminous reflectance value to be zero. Position the second-class standard samples according to the specimen reflection location indicated in Article 3.5.4.2. Place the extinction trap behind the second-class samples Adjust the value (Cb) of the second-class instrument to the visible light luminous reflectance value (??0) of the first-class instrument as possible. 9.4.4 Measurement of Second-class Instrument
For the measurement on second-class instrument, it shall adjust the
specimens and extinction trap according to Article 9.4.3, so as to measure the visible light luminous reflectance value (Ca) of the specimen.
The flattest area of the specimen shall be observed. At least three separate measured values shall be read.
9.4.5 Calculation of Calibration Standard illuminant A Visible Light
Luminous Refl...

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