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首页> 外文会议>AFS 2008 annual conference amp; exposition: infrastructure, sustainability amp; testing management conference: technical sessions >Filter Media Pore Size Comparison Between Porometry and Glass Bead Challenge Testing
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Filter Media Pore Size Comparison Between Porometry and Glass Bead Challenge Testing

机译：孔隙度法和玻璃微珠挑战测试之间的过滤介质孔径大小比较

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摘要

Pore size measurement by the indirect method of porometry can produce varying resultsrndependent on the operator, the sample holder type, and of course, the type of porometer. Therntypical ISO Test Dust challenge testing procedure, although rigorous, is also dependent on labrnprotocols as well as its dependence on accurate particle counting of these ISO irregular shapedrnparticles. As a result, a much simpler challenge method has been developed by WhitehousernScientific that utilizes NIST certified glass beads and a Gilson sonic sifter. This new method canrndetermine a filter media's 97% efficiency (cut-point) via a highly accurate direct challenge withrnprecisely sized spherical particles. This paper will discuss this method and compare the resultsrnto porometry values that were obtained on various porometers after they were calibrated andrncross-validated.
机译：通过孔率法的间接方法测量孔径可以产生不同的结果，这取决于操作员，样品架的类型，当然也取决于孔度计的类型。典型的ISO测试除尘挑战测试程序虽然严格，但也依赖于实验室协议以及其对这些ISO不规则形状粒子的精确粒子计数的依赖。结果，WhitehousernScientific开发了一种更为简单的挑战方法，该方法利用了NIST认证的玻璃珠和Gilson声波筛。这种新方法可以通过对尺寸精确的球形颗粒进行高精度的直接挑战来确定过滤介质的97％效率（切点）。本文将讨论这种方法，并将其与校准和交叉验证后在各种孔度计上获得的孔隙率值进行比较。

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