How do you read ISO particle count?
ISO codes show 3 sets of separated numbers. These numbers refer to ranges depicting the number of particles ‘larger than’ 4 micron, 6 micron and 14 micron per 1mL respectively. Obviously, as 6 micron and 14 micron particles are both larger than 4 micron, those particles are all also present in the first number.
What is ISO cleanliness code?
ISO Cleanliness Code is a three digit value used to communicate particulate contamination in oil. The international standard for reporting contamination is ISO 4406:99. A laser is used to count particles of various sizes, within a 1 ml sample, and reported in three channels.
What does the ISO code do?
The International Organization for Standardization (ISO) has developed a cleanliness code used as the primary reviewed piece of data on most industrial oil analysis reports. The value of this code can help determine the overall cleanliness of the monitored system.
How are particles measured in ISO 4406-99?
The laser counts the quantity and size of the particles it sees. The full report shows the quantity of particles that are of the value and larger for each of the following particle size (in microns): 4µm, 6µm, 10µm, 14µm, 21µm, 38µm and 70µm.
What do the numbers mean in ISO 4406?
Commonly known as the ISO Code, ISO 4406 reports data in the form of X/Y/Z, where X, Y, and Z are integers whose values correspond to the number concentration of particles larger than 4, 6, and 14 µm (c).
What happens to particulates when ISO 4406 is changed?
“Each difference in code, e.g. the 22 in example above increased to 23, would mean that the number of 4 Micron, and larger particulates would be doubled,” he said. “On the other hand, if the code goes down by one, the amount of particulates in a particular size range would be cut in half.”
How do you use iso 4406 cleanliness code charts?
How do you use Cleanliness Code Charts (ISO 4406)? The objective of the ISO 4406:1999 is to classify particulate contaminants in hydraulic fluids. Particle counts are determined cumulatively, i.e. > 4 μm, > 6 μm and > 14 μm, and coded for easy comparison.