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GB/T 10589-2008: Specifications for low temperature test chambers Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 10589: Historical versions
Similar standardsGB/T 10589-2008: Specifications for low temperature test chambers---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT10589-2008GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.040.10 N 61 Replacing GB/T 10589-1989 Specifications for low temperature test chambers Issued on. JUNE 30, 2008 Implemented on. JANUARY 01, 2009 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of PRC. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 Conditions of use... 7 5 Technical requirements... 8 6 Test method... 9 7 Inspection rules... 18 8 Markings, packaging, storage... 20 Appendix A (Informative) Suspicious data identification method... 22 Appendix B (Informative) Evaluation of measurement uncertainty of temperature variation... 24ForewordThis standard is one of the Specifications for environmental test equipment" series of standards. This series of standards consists of the following standards. - GB/T 10586-2006 Specifications for damp heat chambers - GB/T 10587-2006 Specification for salt mist test chambers - GB/T 10588-2006 Specification for mould growth test chambers - GB/T 10589-2008 Specifications for low temperature test chambers - GB/T 10590-2006 Specifications for high and low temperature/low air pressure testing chambers - GB/T 10591-2006 Specifications for high temperature/low air pressure testing chambers - GB/T 10592-2008 Specification for low/high temperature test chambers - GB/T 11158-2008 Specifications for high temperature test chambers - GB/T 11159-2008 Specifications for low air pressure test chamber This standard replaces GB/T 10589-1989 "Specifications for low temperature test chambers". The main changes between this standard and GB/T 10589-1989 are as follows. - ADD the chapter "Terms and definitions"; the content adopts the relevant parts of IEC 60068-3-5; - According to the concept of temperature fluctuation of IEC 60068-3-5, CHANGE the temperature fluctuation index into 1 °C (see Table 1); - According to the temperature data recording requirements of IEC 60068-3- 5, CHANGE to record data once per minute (see 6.3); - According to the test method of temperature rise and fall rate in IEC 60068- 3-5, MODIFY the test method of temperature rise and fall rate (see 6.5); - EXPAND the range of atmospheric pressure in the environmental conditions of use (see 4.1); - MODIFY the wind speed requirements (see Table 1); - MODIFY the safety protection requirements; ADD the requirements for electrical insulation strength (see 5.3); - ADD the grade of temperature rise and fall rate (see Table 1); - CHANGE the test conditions to the no-load conditions (see 6.2); - ADD the information on the evaluation method of Temperature variation measurement uncertainty and its application (see Appendix B). Appendix A and Appendix B of this standard are informative appendixes. This standard was proposed by China Machinery Industry Federation. This standard shall be under the jurisdiction of the Mechanical Industry Laboratory Instrument and Equipment Standardization Technical Committee. Responsible drafting organizations of this standard. Wuxi Sunan Test Equipment Co., Ltd., Chongqing Star Test Equipment Co., Ltd., Shanghai Espec Environmental Equipment Co., Ltd., Chengdu Tianyu Test Equipment Co., Ltd., Hunan Institute of Metrology and Inspection, Ministry of Information Industry Electronics The Fifth Research Institute, the Institute of Comprehensive Technology and Economics of Machinery Industry Instrumentation. The main drafters of this standard. Ni Yiming, Chen Yunsheng, Xia Yifen, Jin Xubin, Feng Xiaosheng, Li Qingxian, Zou Suyang, Ma Lin, Jin Lihui, Xiong Zhiming. This standard replaces the standard previously issued as follows. - GB/T 10589-1989. Specifications for low temperature test chambers1 ScopeThis standard specifies the terms and definitions, conditions of use, technical requirements, test methods, inspection rules, markings, packaging, storage related to low temperature test chambers (referred to as test chambers"). This standard applies to test chambers that conduct low-temperature tests for electrical, electronic and other products, parts, materials.2 Normative referencesThe 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 191-2008 Packaging - Pictorial marking for handling of goods (ISO 780.1997, MOD) GB 14048.1-2006 Low-voltage switchgear and controlgear - Part 1.General rules (IEC 60947-1.2001, MOD)3 Terms and definitionsThe following terms and definitions apply to this standard. 3.1 Test chamber An enclosed chamber and space the part of which can meet the specified test conditions. 3.2 Temperature setpoint The desired temperature set by the test chamber control device. 3.3 Achieved temperature After stabilization, the temperature at any point in the working space of the test chamber. 3.4 Temperature stabilization The temperature of all points in the working space reaches the temperature setpoint and is maintained within the specified tolerance range. 3.5 Temperature fluctuation After stabilization, the difference between the highest and lowest temperature at any point in the working space within a specified arbitrary time interval.4 Conditions of use4.1 Environmental conditions 4.2 Power supply conditions 4.3 Water supply conditions Tap water or circulating water that meets the following conditions can be used; 4.4 Load conditions The load of the test chamber shall meet the following conditions at the same time.5 Technical requirements5.1 Product performance The performance items and indexes of the test chamber are as shown in Table 1. 5.2 Product structure and appearance requirements 5.2.1 The inner wall of the test chamber shall be made of materials that are heat-resistant, resistant to oxidation, corrosion-resistant, have certain mechanical strength. There shall be no pollution sources that affect the test. 5.2.8 It shall be provided with leading holes. 5.2.9 The appearance coating layer shall be flat and smooth, with uniform color; there shall be exposed bottom, blistering, layering or scratches. 5.3 Safety and environmental protection requirements 5.3.1 Between the power supply terminal and the metal shell of the chamber - Insulation resistance value shall meet the following requirements. cold state resistance ≥ 2 MΩ, hot state resistance ≥ 1 MΩ; - It shall be able to withstand a voltage withstand test of 50 Hz, 1500 V AC voltage and a voltage application duration of 5 s.6 Test method6.1 Main test instruments and devices 6.1.1 Anemometer An anemometer which has an induction capacity of not less than 0.05 m/s. 6.2 Test conditions 6.2.1 The test conditions shall meet the requirements of 4.1, 4.2 and 4.3. 6.2.2 The test is carried out under no-load conditions. 6.2.3 When conducting the temperature fall rate test, the ambient temperature shall not be higher than 25 °C; the cooling water temperature shall not be higher than 30 °C. 6.3 Method of temperature test 6.3.1 Location and number of test points 6.3.3 Data processing and test results 6.3.3.1 Correct the measured temperature data according to the correction value of the test instrument. 6.3.3.2 Eliminate suspicious data (refer to Appendix A). 6.3.3.6 Calculate the temperature variation according to formula (4). 6.3.3.8 All the above calculation results shall meet the requirements of Table 1. 6.3.3.9 According to actual needs, evaluate the uncertainty of the measurement results (refer to Appendix B). 6.4 Method of testing the temperature difference between the inner wall of the working chamber and the working space 6.4.1 Location and number of test points 6.5.3 Calculation and evaluation of test results 6.5.3.1 Correct the measured temperature value according to the correction value of the test instrument. 6.5.3.2 Calculate the average temperature fall rate according to formula (7). 6.6 Wind speed test method 6.6.1 Test conditions This test is carried out under no-load and room temperature conditions. 6.6.2 Number and location of test points The number and location of the test points are the same as 6.3.1. 6.6.3 Test procedure 6.8 Test method for sealing performance of chamber door 6.8.1 Before and after the tests of 6.3 ~ 6.9 of this standard, it shall be checked each. 6.8.2 Put a 0.1 mm thick, 50 mm wide, 200 mm long paper strip vertically on any part between the door frame and the door sealing strip. After closing the door, pull the paper gently with hands. If it cannot slide freely, it meets the requirements of 5.2.5.8 Markings, packaging, storage8.1 Marking 8.1.1 The nameplate of the test chamber shall be clear and durable, fastened firmly. 8.1.2 The content of the product nameplate shall include. 8.2 Packaging 8.2.1 The words and signs of the packing chamber shall comply with the requirements of GB/T 191-2008. 8.2.2 The packaging carton shall be firm and reliable. 8.3 Storage 8.3.1 The fully packaged test chamber shall be stored in a well-ventilated warehouse without corrosive gases and chemicals. 8.3.2 If the storage period is longer than one year, the exit-factory inspection shall be carried out again before leaving the factory. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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