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滤膜完整性测试仪 滤芯气泡点检测仪  菜单功能介绍 

为了使测试者更易操作，本仪器设计了中文菜单界面及状态提示栏。以下介绍各个菜 单的级联关系和功能 

滤膜完整性测试仪 滤芯气泡点检测仪  仪器的进气单元采用了全自动数字控制，大大增加了检测过程的稳定性，完全摒弃了国内检测仪还需要生产厂家的专业人员采用调节进气旋钮控制进气速度的原始方法。

开机 

1. 将仪器电源插头插入 220V，50Hz 的交流三芯插座。 

2. 打开仪器背板上的电源开关，接通仪器的电源，进入开机主界面，点击 点击测试选项，进入测试界面：

背面析介绍：

1、 电源开关，控制整台仪器的电源供给。

2、 电源插座，提供 220V 交流电源。 

3、 保险丝。 

4、 进气接头。 

5、 出气管接头。 

6、 放气接头

Water intrusion pressure maintaining method

This method is designed for testing hydrophobic cartridge filter elements. At present, alcohol impregnated filter membrane is used for this kind of filter element when the first several methods are used for testing. Because the use of alcohols will bring safety problems caused by health and flammability, only deionized water / water for injection (di/wfi) level water is used in the water immersion test, and the filter membrane will not be wet, which means that this is a very attractive test method in principle.

The principle of water intrusion pressure maintaining method is to add water pressure to the dry and clean hydrophobic membrane. The surface tension and capillary tension make the water be repelled. When the pressure gradually increases to a certain value, the water is pressed through the largest hole on the membrane. This pressure value is called water intrusion pressure. When the water pressure is slightly lower than the water intrusion pressure value, isolate the upstream volume, maintain it for a certain time, make the system stable, and then measure the pressure decay value, The integrity of the filter can be judged by comparing the measured value with the specified value. This method is called water intrusion pressure maintaining method. The water intrusion pressure value is related to the pore diameter of the membrane, the hydrophobicity of the membrane, the purity of water, the temperature of water, the cleanness of the membrane, the dryness of the membrane, etc. there are many factors that affect it, so it is very difficult to achieve the reproducibility of this test in practice. Therefore, this method can be used as a rough inspection of the filter. If the water intrusion pressure maintaining method passes, the filter can be used. If it fails, it can be further verified by diffusion flow or pressure maintaining method.

水侵入保压法 

这种方法是为测试疏水型筒式滤芯所设计的。目前用前几种方法测试时，对此类滤芯都使用醇类浸润滤膜。由于醇类的使用会带来健康和可燃性引起的安全性问题，而用水浸入法测试时只使用去离子水/注射用水（DI/WFI）级别的水，且滤膜不会被湿透，意味着在原理上这是一种极具吸引力的测试方法。

水侵入保压法的原理是在干燥清洁的疏水性膜上加上水压，表面张力和毛细管张力使水被排斥，当逐渐升高压力到一定值，水被压过膜上最大孔，此压力值被称为水侵入压力， 当所加水压略低于水侵入压力值，并隔绝上游体积，保持一定时间，使系统稳定，然后测量压力衰减值，将测量值与规定值比较就能判断滤器的完整性，这种方法称为水侵入保压法。 水侵入压力值与膜的孔径、膜的疏水性、水的纯度、水的温度、膜的洁净度、膜的干燥度等有关，影响的因素较多，在实践中要实现这种测试的重现性是很困难的。因此这种方法可作滤器的粗检，如果水侵入保压法通过，滤器可以使用，如果通不过则用扩散流或保压法进一步进行 验证。

能实现大容量过滤器的完整性检测。我们的测试仪针对大容量的过滤器的完整性进行了专门的设计，保证了在测量多芯过滤器时，测量精度不会减弱。