state of cleanliness of a component or a fluid that meets the specified cleanliness level that is to say with a measured cleanliness level (CLm) lower than or equal to the specified cleanliness level (CLs)

room whose ambient particulate contamination level does not have negative effect on the cleanliness measurements

sampling device cleaned and conditioned according to an appropriate and validated method

industrial process for the reduction of the quantity of contaminants present in a fluid, in or on a component until the specified cleanliness level (CLs) has been reached

progress curve of the cleanliness level of a fluid or component subject to cleaning

liquid compatible with the extraction sample used for conditioning of the analysis equipment and/or monitoring of the blank value of the analysis set-up

condition of a product, surface, device, gas, liquid, etc., characterized by the absence of particulate contamination

methodical and independent examination with the view of determining whether the manufacturing process of a product and all the relevant activities provide the assurance that the cleanliness level shall be effectively obtained and/or maintained

range of operations aimed at bringing as many contaminants as possible from a component to a measuring equipment for their analysis or quantification

all equipment and products used to extract, collect and analyse the contaminants in order to determine the cleanliness level

amount and/or nature of contaminant present on the controlled surfaces and/or in controlled volumes of a component

document that specifies the cleanliness level required (CLs) for a given component along with the agreed inspection method

room in which the concentration of airborne particles is controlled, and which is constructed and used in a manner to minimize the introduction, generation, and retention of particles inside the room, and in which other relevant parameters e.g. temperature, humidity, and pressure, are controlled as necessary [ISO 14644-1:1999]

presence of more than one particle in the sensing volume of an APC at the same time

any device (e.g. conical flask, beaker, tray, funnel, collection area of the spraying chamber) with a size and a shape suited to the collection of all the extraction liquid draining from the test component

general term used to cover a part, a sub-assembly, a part assembly or a system fitted to a road vehicle

alpha-numeric expression of the cleanliness level (CL) of a component measured or specified by the particle size distribution of the contaminants

any device, the characteristics of which allow the test component to be handled and transported from a location (e.g. the production line) to the test location and/or to handle liquids during the test

undesirable substance which is in suspension in a fluid or in or on a component

all contaminants in a fluid, system or on a component

surface of a component subjected to cleanliness requirement and/or the subject of a cleanliness inspection

volume of a component subjected to a cleanliness requirement and/or the subject of a cleanliness inspection or measurement