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2.24 抗腐蚀性

测试时间：22天。适用于A、B、C、D型（D型带硬件）。

盐溶液。5% +/-1%

水。使用没有杂质和化学品（氯、碳酸钙、不溶于水等）的相对干净的水，并且在测试时，25°C时的pH值在6.5至7.2之间。

程序。

1. 测量三种型号扬声器的声压级与频率的关系和阻抗与频率的关系。进行标准的摩擦和嗡嗡声测试。2. 2. 将测试室的温度调整到35℃。在这个测试中，被测物不应该是可操作的。在引入盐雾之前，DUT至少要有2个小时的条件。3. 将盐溶液连续雾化到测试室中，持续24小时。在整个曝光期间，测量盐雾的落下率和落下液的pH值（最多相隔24小时）。确保落差在1到3ml/2000px2/hr之间。4. 在标准环境温度和相对湿度低于50%的条件下，将DUT干燥24小时。在干燥期间，尽量减少处理DUT或调整任何机械功能。5. 重复步骤3和4各11次（共22天）。6. 6. 目视检查被测物，包括分频网络、终端和所有传感器。对被测物进行声压级和阻抗的后测试，并将结果与原来的测量结果进行比较 进行摩擦和嗡嗡声测试。7. 与QSC的TD讨论报告，以获得批准或可能的修改。

2.24 Corrosion resistance

Duration of the test: 22 days. Applies to model A, B, C, D (D with hardware).

Salt solution: 5% +/-1%

Water: Use water that is relatively clean of impurities and chemicals (Chlorine, calcium carbonate, insoluble, etc.) and has a pH in the range of 6.5 to 7.2 at 25°C at the time of the test.

Procedure:

1. Measure SPL vs frequency and impedance vs, frequency for the three speaker models. Perform standard rub & buzz test.

2. Adjust the test chamber temperature to 35°C. DUTs should not be operational during this test. Condition the DUT for at least 2 hours before introducing salt fog.

3. Atomize the salt solution continuously into the test chamber for a period of 24 hours. During the entire exposure period, measure the salt fog fallout rate and pH of the fallout solution (at most at 24-hour intervals). Ensure the fallout is between 1 and 3 ml/2000px2/hr.

4. Dry the DUT at standard ambient temperatures and a relative humidity of less than 50% for 24 hours. Minimize handling the DUT or adjusting any mechanical features during the drying period.

5. Repeat steps 3 and 4 eleven times each (22 days total).

6. Visually examine the DUT, including crossover network, terminals, and all transducers. Post-test the DUT for SPL and impedance, and compare results to the original measurements Perform rub & buzz test.

7. Discuss report with QSC’c TD for approval or possible changes.