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Cellulose Media -- a filter material made from plant fibers. Because cellulose is a natural material, its fibers are rough in texture and vary in size and shape. Compared to synthetic media, these characteristics create a higher restriction to the flow of fluids. Centipoise (cp) -- a unit of absolute viscosity. 1 centipoise = 0.01 poise. Centistoke (cst) -- a unit of kinematic viscosity. 1 centistoke = 0.01 stoke. Centralized lubrication -- a system of lubrication in which a metered amount of lubricant or lubricants for the bearing surfaces of a machine or group of machines are supplied from a central location. Centrifugal separator -- a separator that removes immiscible fluid and solid contaminants that have a different specific gravity than the fluid being purified by accelerating the fluid mechanically in a circular path and using the radial acceleration component to isolate these contaminants. ceRoast -- handheld onsite sample point identification and data collection system providing paperless and error free recording available from The Fluid Life Corporation. CET -- Certified Engineering Technologist. Channel Point -- a measure of the lowest temperature at which a gear lubricant may be used safely. The lubricant is cooled to a given temperature at which point a strip or paddle is drawn through the oil. The time for the lubricant to flow back together at the bottom of the sample is measured. The temperature at where the time required is greater than 5 seconds is reported as the channel point. Checkpoint -- add on software module for Fluid Life's patented WinRoast oil analysis management software. The CheckPoint module adds lube task, maintenance task, route, and work order scheduling, reporting, tracking and recording right in WinRoast. Can also be combined with ceRoast on handhelds for a completely paperless system. Chemical stability -- the tendency of a substance or mixture to resist chemical change. Chip control (grit control, last-chance) filter -- a filter intended to prevent only large particles from entering a component immediately downstream. Chromium (Cr) -- element number 24 on the periodic table of the elements. In the context of oil analysis chromium can be present as a wear metal in various sampled components and the origins can be from such sources as: rings, bearings, and rods just to name a few. Circulating lubrication -- a system of lubrication in which the lubricant, after having passed through a bearing or group of bearings, is recirculated by means of a pump. Cleanable -- a filter element which, when loaded, can be restored by a suitable process, to an acceptable percentage of its original dirt capacity. Clean room -- a facility or enclosure in which air content and other conditions (such as temperature, humidity, and pressure) are controlled and maintained at a specific level by special facilities and operating processes and by trained personnel. Cleanliness level (CL) -- a measure of relative freedom from contaminants. Clearance bearing -- a journal bearing in which the radius of the bearing surface is greater than the radius of the journal surface. Cloud point -- the temperature at which waxy crystals in an oil or fuel form a cloudy appearance. CLS -- Certified Lubrication Specialist. Coalescor -- a separator that divides a mixture or emulsion of two immiscible liquids using the interfacial tension between the two liquids and the difference in wetting of the two liquids on a particular porous medium. Coefficient of friction -- the number obtained by dividing the friction force resisting motion between two bodies by the normal force pressing the bodies together. Cohesion -- that property of a substance that causes it to resist being pulled apart by mechanical means. Cold cranking simulator (CCS) -- an intermediate shear rate viscometer that predicts the ability of an oil to permit a satisfactory cranking speed to be developed in a cold engine. Collapse -- an inward structural failure of a filter element which can occur due to abnormally high pressure drop (differential pressure) or resistance to flow. Collapse pressure -- the minimum differential pressure that an element is designed to withstand without permanent deformation. Compatibility -- the ability of petroleum products to form a homogeneous mixture that neither separates nor is altered by chemical reaction.
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