便携式数显完整性测试仪  BQS-19 型测试仪采用 5.7″带背光数字液晶显示屏；中文菜单及提示，实时显示测试数 据和曲线，并可打印测试结果及测试曲线，以便监控测试全过程，帮助分析滤膜及过滤系统的性 能；机内大容量存贮空间，可存贮 50 组测试结果及 50 组测试参数。过滤器完整性的全部操作测 试过程仅在过滤器的上游进行，对过滤器的下游无污染，尤其适用于除菌过滤器的检测。 

    便携式数显完整性测试仪  此测试仪可广泛运用于医药、生物工程、食品饮料、微电子等行业，也是过滤器制造商进 行过滤器检测的常规仪器。 

Bqs-19 tester adopts 5.7 ″ digital LCD with backlight; Chinese menu and prompt can display test data and curves in real time, and print test results and curves, so as to monitor the whole test process and help analyze the performance of filter membrane and filtration system; it has large storage space, and can store 50 groups of test results and 50 groups of test parameters. The whole operation test process of filter integrity is only carried out in the upstream of the filter, which has no pollution to the downstream of the filter, and is especially suitable for the detection of sterilization filter.

This tester can be widely used in medicine, bioengineering, food and beverage, microelectronics and other industries. It is also a conventional instrument for filter manufacturers to test filters.

 

便携式数显完整性测试仪 孔径测量范围

润湿剂	表面张力（mN/m）	孔径测试范围(μm)
去离子水	72.8	0.4 ~ 500
GQ–20	20	0.1 ~ 100
乙醇	22.3	0.1 ~ 100
GQ–16	16	0.1 ~ 100

 

便携式数显完整性测试仪 应用范围：

圆片滤膜（Disc membrane）：Φ25mm至Φ300mm的各种滤膜

标准折叠式滤芯 (Standard cartridge)：2.5″至40″，1芯至15芯

囊式滤芯 (Capsule)

小型滤芯 (Mini cartridge)

空气过滤器的检测   2.5″至40″

 

气泡点法 

    当多孔膜材料被合适的浸润液完全湿润后，由于液体的表面张力和相应毛细管张力的作用， 浸润液充满膜孔并驻留在孔中。在滤材的两侧加上气体压差，要克服毛细管压力将孔道中的液体 赶走而冒出气泡，气体的压差必须增大到某一值?P，这个压差值就称为气泡点，其计算公式如 式 1。式 1 表明，孔径愈小，气泡点愈高，因此可以用气泡点来检测过滤器的性能。 

          ?P=K4σ cosθ / D                                                                                                   （ 式 1）

其中：  ?P—压差（达因/厘米 2），气泡点值

σ—浸润液的表面张力（达因/厘米） 

θ—滤膜与浸润液的接触角 

D—孔径（厘米） 

K—孔形系数（因为真实的滤膜上的孔不是圆柱形）

 

仪器的特点与优势：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。数据处理技术先进：采用了先进的人工智能技术，实时采集不断变化的表观扩散流数据流，用于分析识别扩散流、粘性流模式，可以准确指认滤芯起泡点值，对滤膜/滤芯泡点的测试结果与真实的细菌截流性能关联性更好。我们BQS-19全自动过滤器完整性测试仪是目前国内唯一一家能通过实测过滤器的上游体积而得到实际扩散流的检测仪器。仪器的核心部件均采用进口件，并在设计过程中对使用的安全性进行了细致的分析，在保证基本电气安全和机械安全的前提下，对操作过程的各个环节都进行了安全处理。采用标准化的自动滤材浸润程序：通过一个标准化的自动滤材浸润程序，保证滤材完全被液体浸润，同时启动后续的测试工作, 不会影响下游的无菌状态，满足了在线测试的要求。超大容量的数据存储功能，可保存500组测试结果及其测试曲线。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。由于采用了先进的算法和滤波手段，使仪器具有了可与国外检测仪相媲美的稳定性和可靠性，解决了国内仪器不稳定性的通病。

 

电源：工作电源：220V-50H，电源线一端插入机箱后面板电源插口内，开启开关后电源接通。

Power supply: working power supply: 220v-50h, one end of the power cord is inserted into the power socket on the rear panel of the chassis, and the power is connected after the switch is turned on.

 

技术参数：

电源/功率	170-240V AC, 50/60Hz；100W
大操作压力	7999 mbar
低进气压力	3000 mbar
外型尺寸	500(长) x200（宽）x 180(高)
测试范围	测试压力：500-6900mbar
测试精度	灵敏度：± 1.0 mbar ；   气泡点：±60 mbar ；
操作条件	环境温度：0℃ ~50℃；  相对湿度：10-80%
测试耗时	基本泡点测试：2 min±2min；    扩散流测试7±2min；            水浸入流量测试7±2min；  系统气密性：3±1min；
打印功能	中文/英文打印，打印测试条件、测试结果、测试曲线；
历史记录功能	32G存储空间，保存数据100万条
显示屏	尺寸：5.7寸；32位；触摸屏
语言选项	中文/英文

 

 保压法（压力衰减） 

       滤材被液体（湿润液）浸润后，在滤材的两侧加上气体压差，并使滤材上游成为一个密闭 的气压腔，所加的压差值略小于滤材的气泡点（一般设定在气泡点的 80%），这时气体不能在滤 材的毛细孔中直接流通，但气体分子可以通过毛细孔中的液体扩散至下游，这种由于气体扩散而 形成的气体流量称为扩散流。由于气体的扩散，滤材上游的压力将衰减，衰减值的大小和滤材的 过滤性能形成对应关系，因此测得一定时间内的压力衰减值就能判断过滤器的性能。 

Pressure retaining method (pressure attenuation)

After the filter material is soaked by liquid (moist liquid), add the gas pressure difference on both sides of the filter material, and make the upstream of the filter material become a closed air pressure chamber. The pressure difference added is slightly smaller than the bubble point of the filter material (generally set at 80% of the bubble point). At this time, the gas cannot be filtered The material can flow directly in the pores, but the gas molecules can diffuse downstream through the liquid in the pores. This gas flow formed by gas diffusion is called diffusion flow. Due to the diffusion of gas, the pressure upstream of the filter material will be attenuated, and the attenuation value will form a corresponding relationship with the filtration performance of the filter material. Therefore, the filter performance can be judged by measuring the pressure attenuation value within a certain time.

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。 

Water intrusion pressure retaining method

This method is designed for testing hydrophobic cartridge filter. At present, alcohol infiltration membrane is used for this kind of filter element. Because the use of alcohols will bring about safety problems caused by health and flammability, the water immersion method only uses deionized water / water for injection (di / WFI) grade water, and the filter membrane will not be soaked, which means that in principle, this is a very attractive test method.

The principle of water invasion and pressure maintaining method is to add water pressure, surface tension and capillary tension to the dry and clean hydrophobic membrane to make the water dissolved Rejection: when the pressure is gradually increased to a certain value, the water is pressed through the largest hole on the membrane, which is called water invasion pressure. When the water pressure is slightly lower than the water invasion pressure, the upstream volume is isolated and maintained for a certain period of time to make the system stable. Then the pressure attenuation value is measured, and the integrity of the filter can be judged by comparing the measured value with the specified value. This method is called water invasion pressure maintaining Law.

The value of water invasion pressure is related to the pore size, hydrophobicity, purity, temperature, cleanliness and dryness of the membrane. There are many influencing factors, so it is difficult to achieve the reproducibility of this test in practice. Therefore, this method can be used for the rough inspection of the filter. If the water invades and passes the pressure maintaining method, the filter can be used. If it fails, the diffusion flow or pressure maintaining method can be used for further verification

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