Subject: Humidity test requirements
Question:
Various IEC standards have requirements for humidity / temperature conditioning, but have different specifications for the test conditions.
- IEC 60065 – 93% +/- 3% (t 20-30℃ +/- 2℃ or 40℃ +/- 2℃);
- IEC 60950-1 – 93% +/- 3% (t 20-30℃ +/- 2℃ or 40℃ +/- 2℃);
- IEC 60601-1 – 93% +/- 3% (t 20-30℃ +/- 1℃);
- IEC 61010-1 – 93% +/- 3% (t 40℃ +/- 2℃);
- IEC 60335-1 – 93% +/- 3% (t 20-30℃ +/- 1℃).
There does not seem to be a technical justification for the differencies in the specifications. Accordingly, it is suggested and recommended that the humidity / temperature specifications in the above standards be consistent.
Decision:
The chamber is to be set at 93% RH, with +/- 3% RH tolerance, at a convenient temperature between 20℃ and 30℃ or an appropriate higher temperature when required by the specific product standard, but the chosen temperature to be kept within +/- 2℃ during the test.
The standard specifications for the humidity are to be met at the reference / measuring point, where the controlling humidity sensor is located.
问题：
各IEC标准都对湿度/温度调节有要求，但对测试条件有不同的规范。
- IEC 60065 – 93% +/- 3% (t 20-30℃ +/- 2℃ or 40℃ +/- 2℃);
- IEC 60950-1 – 93% +/- 3% (t 20-30℃ +/- 2℃ or 40℃ +/- 2℃);
- IEC 60601-1 – 93% +/- 3% (t 20-30℃ +/- 1℃);
- IEC 61010-1 – 93% +/- 3% (t 40℃ +/- 2℃);
- IEC 60335-1 – 93% +/- 3% (t 20-30℃ +/- 1℃)。
标准差异似乎没有技术理由。
因此，建议和推荐上述标准中的湿度/温度条件保持统一。
决定：
环境设置在93%RH，具有+/-3%RH容差，在20℃至30℃之间的合适温度或特定产品标准要求的更高温度，但在测试过程中要保持在所选温度的±2℃以内。
在控制湿度传感器所在的参考/测量点达到湿度的标准条件。
提示：
决议大意是两个：
1、没声明更高要求时，按对应标准条件作为默认条件；
2、湿度测量点以传感器所在位置为准。
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