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GB/T 7287-2008 English PDF (GBT7287-2008)

GB/T 7287-2008 English PDF (GBT7287-2008)

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GB/T 7287-2008: Test method of infrared heater

This standard specifies the performance test method for infrared heaters. This standard applies to the infrared heaters, including various low temperature, medium temperature and high temperature metallic matrix or non-metallic matrix electrical infrared heaters.
GB/T 7287-2008
GB
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
ICS 25.180.10
K 60
Replacing GB/T 7287.1 ~ GB/T 7287.12-1987
Test method of infrared heater
ISSUED ON. JUNE 30, 2008
IMPLEMENTED ON. APRIL 01, 2009
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of China.
Table of contents
Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Product classification ... 7
5 Test items ... 8
6 General conditions of test ... 9
7 Testing method of the heater dimension, shape and appearance ... 9
8 Measurement method of surface temperature distribution of heater ... 10 9 Measurement method of ratio of heater radiant surface to the back surface temperature... 12
10 Measurement method of heater temperature rise time ... 13
11 Measurement method of power deviation of heater ... 14
12 Test method for leakage current and electrical strength of the heater at working temperature ... 15
13 Test methods of moisture resistance of heater ... 17
14 Test method of leakage current and electrical strength of heater ... 17 15 Measurement method of insulation resistance of heater ... 18
16 Test method of alternating cold-hot resistance of heater ... 19
17 Measurement method of electric-to-radiant power transfer efficiency of heater ... 21
18 Measurement method of normal total emissivity of heater ... 24
19 Measurement method of normal spectral emissivity of heater ... 28
20 Measurement method of effective radiant energy ratio, distribution
temperature, and radiant wavelength range of the heater ... 31
21 Tensile test method of heater terminals ... 33
22 Test method of the service life of heater ... 33
23 Test method of vibration of heater ... 35
24 Test method of mechanical strength of heater ... 35
25 Test method of bending of heater ... 36
26 Test method of peel strength of heater ... 36
27 Test method of flame retardancy of heater ... 37
28 Test method of low temperature storage of heater ... 37
29 Test method of overload capacity of heater... 37
Foreword
This standard replaces GB/T 7287.1 ~ GB/T 7287.12-1987 ?€?Test method of
infrared heater?€?. As compared with the latter, the main changes of this standard are as follows.
- In accordance with the development of infrared heater manufacturing and testing technology, EXTEND the scope of application from the medium
temperature infrared heater to a variety of low temperature, medium
temperature and high temperature infrared heater.
- ADD three parts. ?€?Normative references?€?, ?€?Terms and definitions?€?, and ?€?Product classifications?€?.
- In accordance with the changes of relevant standard, ADD the test
methods of such performance indicators as ?€?leakage current and electrical strength at working temperature?€?, ?€?moisture resistance?€?, ?€?effective
radiation energy ratio and distribution temperature?€?, ?€?terminal tensile force?€?, ?€?mechanical strength?€?, ?€?bending test?€?, ?€?peel strength?€?, ?€?flame retardant performance?€?, ?€?low temperature storage?€?, and ?€?overload capacity?€?, and so on.
- As for the measurement of normal total emissivity, ADD the ?€?thermal
image measurement method?€? (method B) on the basis of the ?€?relative
radiometer method?€?.
- As for the electrical heat radiation conversion efficiency, ADD the ?€?thermal image measurement method?€? (method B) and the ?€?distribution radiancy
method?€? (method C) on the basis of the "radiometer method".
This standard was proposed by China Electrical Equipment Industry
Association.
This standard shall be under the jurisdiction of the National Industrial Electrical Heating Equipment Standardization Technical Committee (SAC/TC 121).
The drafting organizations of this standard. National Infrared and Industrial Electrical Heating Product Quality Supervision and Inspection Center,
Yangzhong Datang Electric Manufacturing Co., Ltd., Nanjing Lishui Best Co., Ltd.
The main drafters of this standard. Zeng Yu, Xiong Jie, Ye Ping, Li Gang, Tang Ruixian, Wei Siping.
This Standard replaces the standard previously issued as follows.
- GB/T 7287.1 ~ 7287.12-1987.
Test method of infrared heater
1 Scope
This standard specifies the performance test method for infrared heaters (hereinafter shortly referred to as ?€?heaters?€?).
This standard applies to the infrared heaters, including various low
temperature, medium temperature and high temperature metallic matrix or non-metallic matrix electrical infrared heaters.
This standard describes the basic characteristics of infrared heaters AND specifies the methods to test these characteristics, for reference by the user. 2 Normative references
The provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard; however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB/T 2423.10-2008 Environmental testing for electric and electronic
products - Part 2. Test methods - Test Fc. Vibration (sinusoidal) (IEC
60068-2-6.1995, IDT)
GB/T 2900.23-2008 Electrotechnical terminology - Industrial electroheat (IEC 60050-841.2004, IDT)
GB 4706.1-2005 Household and similar electrical appliances - Safety - Part 1. General requirements (IEC 603351.2001, IDT)
GB 4706.8-2003 Household and similar electrical appliances - Safety -
Particular requirements for blankets pads and similar flexible heating
appliances (IEC 60335.21.1998, IDT)
GB/T 8808-1988 Test method for peeling of soft composite plastic materials (neq DIN 53357.1982)
GB/T 10066.1-2004 Test methods for electroheat installations - Part 1.
Generic (IEC 60398.1999, MOD)
GB/T 10066.12-2006 Test methods for electroheat installations - Part 12. Infrared heating installations
QB/T 2057-2006 Infrared lamps
3 Terms and definitions
The terms and definitions as defined in GB/T 2900.23-2008 and GB/T
10066.12-2006 AND the following terms and definitions apply to this part. 3.1
Infrared heater
It refers to the heater which converts the input energy mainly into the infrared radiant energy.
3.2
Conditions of adequate heat discharge
It refers to the working state of the heater under normal use conditions. 3.3
Condition of adequate heated
It refers to the working state of the heater which reaches to the thermal balance through energization and temperature rise under the normal use
conditions.
3.4
Working temperature
It refers to the average temperature of the radiant surface at which the heater is operated at the rated voltage and under the conditions of adequate heat discharge.
3.5
Electric-to-radiant power transfer efficiency
It refers to, after the heater being operated at rated voltage to achieve thermal balance, the percentage of converting the input electrical power into the total radiant flux.
3.6
Ratio for effective radiant power
It refers to the ratio of the radiant flux in the effective infrared spectrum band (1 ??m ~ 25 ??m) to the total radiant flux.
3.7
Temperature rise time
It shall specify the type structure of the heater.
4.3 Classification by working temperature of the product
- Low temperature heater (< 200 ??C);
- Medium temperature heater (200 ~ 600 ??C);
- High temperature heater (> 600 ??C).
It shall specify the working temperature range of the heater.
5 Test items
5.1 Testing of the dimension, shape and appearance of the heater (Chapter 7); 5.2 Measurement of the surface temperature distribution of the heater
(Chapter 8);
5.3 Measurement of ratio of heater radiant surface to the back surface
temperature (Chapter 9);
5.4 Measurement of temperature rise time of the heater (Chapter 10);
5.5 Measurement of heater power deviation (Chapter 11);
5.6 Test of leakage current and electrical strength of heater at working temperature (Chapter 12);
5.7 Test of moisture resistance of heater (Chapter 13);
5.8 Test of leakage current and electrical strength of heater (Chapter 14); 5.9 Measurement of insulation resist...

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