Abstract

The PDM3600 and PDM3700 are two closely related person-wearable dust monitors manufactured by Thermo Fisher Scientific. Both are based on tapered element oscillating microbalance technology and provide nearly real-time, mass-based readings of respirable dust concentrations. From a monitoring perspective, the primary difference between the models is the PDM3600 has an integrated cap lamp with attached inlet, while the PDM3700 has no cap lamp and a revised inlet attaches to the worker’s lapel. Using coals of varied origin and employing a wide range of concentrations, side-by-side measurements from these instruments were collected under controlled laboratory conditions and then compared. By use of ordinary least squares and weighted least squares regression methods, followed by mixed model analysis, results suggest there is no statistically significant or practical difference in instrument performance. The two monitors are equivalent for the field dust concentration measurements for which they were designed.

中文翻译：

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PDM3700 和 PDM3600 粉尘监测仪的等效性

摘要

PDM3600 和 PDM3700 是 Thermo Fisher Scientific 制造的两款密切相关的个人佩戴式粉尘监测仪。两者均基于锥形元件振荡微天平技术，并提供近乎实时、基于质量的呼吸性粉尘浓度读数。从监控的角度来看，这些型号之间的主要区别在于 PDM3600 具有带入口的集成帽灯，而 PDM3700 没有帽灯，并且改进的入口连接到工人的翻领上。使用不同来源的煤炭并采用各种浓度，在受控的实验室条件下收集这些仪器的并排测量结果，然后进行比较。通过使用普通最小二乘和加权最小二乘回归方法，然后进行混合模型分析，结果表明仪器性能不存在统计显着性或实际差异。这两个监测仪对于其设计用途的现场粉尘浓度测量是等效的。