1.1在烹饪和非烹饪条件下（空闲），发动机罩、电器和更换空气系统的捕获和控制性能表征: 1.2设备、罩或更换空气配置中操作或设计变化的参数评估。 1.3确定商业厨房通风/电器系统空间热增量的试验方法已重新指定为试验方法 F2474页 . 1.4以英寸-磅为单位的数值应视为标准值。本标准不包括其他计量单位。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 捕获和控制阈值 — 该测试方法描述了用于确定捕获和遏制阈值（C）的流动可视化技术 & C） 适用于空闲和指定的重度烹饪条件。C的阈值 & C可用于估计发动机罩/电器系统的最小流量。 参数研究 — 该试验方法也可用于对发动机罩、电器和更换空气系统的替代配置进行参数研究。 一般来说，这些研究是通过保持除相关变量外的所有配置和操作变量不变来进行的。因此，本试验方法可用于评估以下各项: 各种电器的整体系统性能，同时保持发动机罩和更换空气系统的特性不变。 整个发动机罩或单个发动机罩的特性（如端盖）可以随电器和更换空气常数而变化。 更换空气的特性，例如补充空气的位置、方向和体积，可以随着恒定的设备和罩变量而变化。

1.1 Characterization of capture and containment performance of hood, appliance(s), and replacement air system during cooking and non-cooking conditions (idle): 1.2 Parametric evaluation of operational or design variations in appliances, hoods, or replacement air configurations. 1.3 The test method to determine heat gain to space from commercial kitchen ventilation/appliance systems has been re-designated as Test Method F2474 . 1.4 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== Threshold of Capture and Containment — This test method describes flow visualization techniques that are used to determine the threshold of capture and containment (C & C) for idle and specified heavy cooking conditions. The threshold of C & C can be used to estimate minimum flow rates for hood/appliance systems. Parametric Studies — This test method also can be used to conduct parametric studies of alternative configurations of hoods, appliances, and replacement air systems. In general, these studies are conducted by holding constant all configuration and operational variables except the variable of interest. This test method, therefore, can be used to evaluate the following: The overall system performance with various appliances, while holding the hood and replacement air system characteristics constant. Entire hoods or characteristics of a single hood, such as end panels, can be varied with appliances and replacement air constant. Replacement air characteristics, such as make-up air location, direction, and volume, can be varied with constant appliance and hood variables.