ASTM D7596-23
Standard Test Method for Automatic Particle Counting and Particle Shape Classification of Oils Using a Direct Imaging Integrated Tester

Standard No.

ASTM D7596-23

Release Date

2023

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D7596-23

Scope

1.1 This test method covers the determination of particle concentration, particle size distribution, particle shape, and soot content for new and in-service oils used for lubrication and hydraulic systems by a direct imaging integrated tester. 1.1.1 The test method is applicable to petroleum and synthetic based fluids. Samples from 2 mm2 /s to 150 mm2 /s at 40 °C may be processed directly. Samples of greater viscosity may be processed after solvent dilution. 1.1.2 Particles measured are in the range from 4 µm to ≥ 70 µm with the upper limit dependent upon passing through a 100 µm mesh inlet screen. 1.1.3 Particle concentration measured may be as high as 5 000 000 particles per mL without significant coincidence error. 1.1.4 Particle shape is determined for particles greater than approximately 20 µm in length. Particles are categorized into the following categories: sliding, cutting, fatigue, nonmetallic, fibers, water droplets, and air bubbles. 1.1.5 Soot is determined up to approximately 1.5 % by weight. 1.1.6 This test method uses objects of known linear dimension for calibration. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM D7596-23 Referenced Document

• ASTM D2896 Standard Test Method for Base Number of Petroleum Products by Potentiometric Perchloric Acid Titration
• ASTM D4057 Standard Practice for Manual Sampling of Petroleum and Petroleum Products
• ASTM D4175 Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants*， 2023-07-01 Update
• ASTM D4177 Standard Practice for Automatic Sampling of Petroleum and Petroleum Products
• ASTM D445 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)
• ASTM D5185 Standard Test Method for Determination of Additive Elements, Wear Metals, and Contaminants in Used Lubricating Oils and Determination of Selected Elements in Base Oils by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)
• ASTM D5967 Standard Test Method for Evaluation of Diesel Engine Oils in T-8 Diesel Engine
• ASTM D6304 Standard Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration
• ASTM D6595 Standard Test Method for Determination of Wear Metals and Contaminants in Used Lubricating Oils or Used Hydraulic Fluids by Rotating Disc Electrode Atomic Emission Spectrometry
• ASTM D7279 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids by Automated Houillon Viscometer*， 2024-04-22 Update
• ASTM E2412 Standard Practice for Condition Monitoring of In-Service Lubricants by Trend Analysis Using Fourier Transform Infrared (FT-IR) Spectrometry*， 2023-11-01 Update
• ASTM G40 Standard Terminology Relating to Wear and Erosion
• ISO 12103-1:1997 Road vehicles - Test dust for filter evaluation - Part 1: Arizona test dust
• ISO 4406 Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles

ASTM D7596-23 history

• 2023 ASTM D7596-23 Standard Test Method for Automatic Particle Counting and Particle Shape Classification of Oils Using a Direct Imaging Integrated Tester
• 2014 ASTM D7596-14 Standard Test Method for Automatic Particle Counting and Particle Shape Classification of Oils Using a Direct Imaging Integrated Tester
• 2010 ASTM D7596-10 Standard Test Method for Automatic Particle Counting and Particle Shape Classification of Oils Using a Direct Imaging Integrated Tester