GB/T 33861-2017Testing method of energy efficiency for temperature test chambers (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard was proposed by China Machinery Industry Federation. This Standard shall be under the jurisdiction of National Technical Committee on Laboratory Instrument and Equipment of Standardization Administration of China (SAC/TC 526). The drafting organizations of this Standard. Guangdong Institute of Product Quality Supervision and Inspection, Yangzhou Optoelectronics Products Testing Center, Machinery Industry Instrumentation Technology and Economy Institute, Hangzhou Xuetemp Technology Co., Ltd., Chongqing Sida Test Equipment Co., Ltd., Guangzhou Wusuo Environmental Equipment Co., Ltd., Shanghai Institute of Measurement and Testing Technology, Shanghai Aisipeike Environmental Equipment Co., Ltd., Chengdu Yihua Tianyu Test Equipment Co., Ltd., Shenzhen Institute of Standards and Technology, Wuxi Sunan Test Equipment Co., Ltd., Hunan Institute of Measurement and Testing, Zhejiang Institute of Metrology, Guangzhou Institute of Energy Testing, Shenzhen National Technology Instrument Co., Ltd., Wuxi Sunan Test Equipment Co., Ltd., Zhuhai Gree Electric Co., Ltd., China University of Metrology. Main drafters of this Standard. Gao Xiaodong, Wang Chengcheng, Tang Lihua, Zhang Guiling, Wei Yuefeng, Li Siyuan, Chen Jinhan, Xu Yueming, Xie Chenhao, Tang Suiping, Feng Hua, Ling Yancui, Chen Yunsheng, Huang Qiang, Wang Ke, Wu Shuangshuang, Yang Ru, Zhou Lianqin, Zhu Ping, Pang Yan, Chen Shuai, Duan Huawei, Meng Jiawen, Zhou Siqing, Huang Yu, Hu Fen, Chen Qiyong, Hu Xiaofeng, Jiang Jianhui, Xie Xiaofang. Testing method of energy efficiency for temperature test chambers

1 Scope

China's national method for measuring how much energy a temperature test chamber consumes. It covers chambers with a working space of not more than 5 cubic metres and a rate of temperature change of not more than 5 degrees C per minute, and it specifies the terms and definitions, the technical requirements, the test conditions and the test methods. A temperature test chamber is a box that holds a product at a commanded temperature, or drives it through a commanded cycle, while somebody watches what the product does. Every laboratory that qualifies electronics, batteries, packaging, pharmaceuticals or automotive parts has several, and they run continuously for weeks at a time because a thermal cycling programme is measured in cycles rather than hours. That duty cycle is why their energy consumption is worth standardising: a chamber is one of the largest single electrical loads in a test laboratory, and until there was an agreed way to measure it there was no way to compare two machines or to hold a supplier to a figure.

This Standard specifies the terms and definitions, technical requirements, testing conditions, testing methods of temperature test chambers (hereinafter referred to as test chambers). This Standard applies to the energy efficiency test of test chambers of which the working space is not greater than 5 m3, temperature rate of change is not higher than 5°C/min.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 10592-2008, Specification for low/high temperature test chambers

GB/T 19923-2005, The reuse of urban recycling water - Water quality standard for industrial uses

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1 temperature test chambers closed body or space equipped with heating and cooling devise at the same time, some of which can meet the specified test conditions

3.2 constant temperature energy efficiency the energy consumed for maintaining constant temperature per working space for 1h during the thermostat of the test chambers NOTE. The unit is J/m3.

5 Testing conditions

5.1 Ambient conditions The ambient testing conditions of test chambers shall meet the following.

a) ambient temperature. 23°C ± 2°C, the temperature gradient of ambient temperature measuring point at the vertical direction shall not exceed 2°C/m; NOTE. ambient temperature (space temperature around the test chamber) refers to the temperature measured at the measuring point, 1m from vertical central line of the test chamber wall, 1m from the ground (the ambient temperature is not affected by the outlet temperature of the test chamber).

b) relative humidity. <=85%;

c) air pressure. 80kPa ~ 106kPa;

d) without forced convection air.

5.2 Power supply conditions The power supply testing conditions for the test chamber shall meet the following.

a) AC voltage. 220V ± 6.6V or 380V ± 11.4V;

b) frequency. 50Hz ± 0.5Hz.

5.3 Water supply conditions Tap water or circulating water meeting the following conditions may be used.

a) water temperature. 23°C ± 1°C;

b) water pressure. 0.20MPa ± 0.05MPa;

c) water quality. meet the requirements of GB/T 19923-2005.