GB/T 20082-2006: Hydraulic fluid power -- Fluid contamination -- Determination of particulate contamination by the counting method using an optical microscope

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Scope

This Standard specifies methods for determining the level of particulate
contamination in liquids used in hydraulic systems by counting the number of
particles deposited on the surface of a membrane filter using an optical
microscope. It includes particle counting by two manual methods and image
analysis, using either transmitted or incident lighting systems.
Particle sizes ≥ 2 μm can be sized and counted by this method, but the
resolution and accuracy of the results will depend upon the optical system used
and the capabilities of the operator.
All hydraulic fluids with a wide range of contamination levels can be analysed
according to this Standard. However, the counting uncertainty at the larger
particle sizes increases if the volume filtered is reduced to allow smaller sized
particles to be counted, where a fine precipitate or a high particle concentration
is present.

Basic Data

Standard ID	GB/T 20082-2006 (GB/T20082-2006)
Description (Translated English)	Hydraulic fluid power -- Fluid contamination -- Determination of particulate contamination by the counting method using an optical microscope
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J20
Classification of International Standard	23.100.60
Word Count Estimation	14,167
Date of Issue	2006-01-23
Date of Implementation	2006-08-01
Quoted Standard	GB/T 12804; GB/T 14039-2002; GB/T 17446; GB/T 17484; GB 50073-2001
Adopted Standard	ISO 4407-2002, IDT
Regulation (derived from)	China National Standard Approval Announcement 2006 No.2 (Total No.89)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies the use of optical microscopy collected through the membrane surface contaminant particle counting, determination of particulate contamination of the hydraulic fluid in the system, including the application of the transmission or the incident optical system, manually particle counting and image analysis of two way. �� 2��m particle size can be counted in this method, the resolution and accuracy of results and the capacity of the optical system and the operator using. All hydraulic system fluid contamination levels can be analyzed according to the standard. Has a fine precipitate or a high concentration of particles in a liquid sample, in order that the smaller the particle size can be reduced by counting the volume of the filter will increase the uncertainty of the large size of the particles counted.