#Iso 4406 particle count code#
#Iso 4406 particle count iso#

How Can we Measure How Much Particle Contamination is in an oil?Particle contamination is measured using the ISO 4406 (c) standard.

#Iso 4406 particle count code#

Results from an oil cleanliness testing are typically reported in a three number format such as 18/16/13, where 18 represents the range code representing the number of particles that are 4 microns and larger, 16 the range of particles that are 6 microns and larger, and 13 represents particles 14 microns and larger. The range code represents the number of particles of a given size in one milliliter of sample. The number of particles is then converted to what is referred to as the ISO Code or Range Code. According to the ISO 4406 standard, the ISO particle count is a measure of the number of particles greater than 4, 6, and 14 microns in every milliliter of fluid. What is Cleanliness?When we speak in terms of cleanliness, we often refer to the ISO particle count of the oil. When oil is kept clean, wear rates go down and component service life goes up. There are set вЂtypicalвЂ™ cleanliness codes for hydraulic machinery and manufacturers recommendations should be adhered to as different components have different tolerances for contamination.Studies show that approximately half of lost machine life is due to mechanical wear and approximately 80% of mechanical wear is caused by particle contamination in the oil. Sampling over a precise time period and trending is vital as the difference between a 17/13/9 report and a 18/13/9 report could be 1 particle or it could be 1200. Thus the number of particles in 1 ml of fluid в‰Ґ14Вµ or over is anywhere between 2.5 and 5. This gives us rounded up figures of 2.5 and 5. They measure and count particles, presenting the results in size bands, giving a snapshot of the particle distribution in terms of particles/ml and ISO 4406 cleanliness codes. Particle counters are simple to operate and provide immediate results. The в‰Ґ14Вµ or larger particle count is represented by 9 - this equates to the number of particles at that size somewhere between 2 8 2 9 divided by 100В (remember the 256 and 512). Cleanliness, or more specifically particle content, is a key factor in fuel quality. The вЂactualвЂ™ particle count would be somewhere between ВЅ of that number and the number. The result is then divided by 100 and rounded to give the maximum number of particles of a certain size or larger that can be expected in a 1 ml fluid sample. Note that the number stated is the power to which 2 is multiplied. The third number gives us the range of particles in the 14Вµ or larger range in 1 ml of sample. The second number gives us the range of particles in the 6Вµ or larger range in 1 ml of sample. The first number gives us the range of particles in the 4Вµ or larger range in 1 ml of sample.

This gives us two pieces of information both the size and the quantity of the particles. Worked example: 17/13/9 (remember each number set is 4Вµ, 6Вµ and 14Вµ respectively) Reverting to the figure the 9 count means we are to expect between 2.5 and 5 counted particles in every 1 ml of sample fluid. It also allows manufacturers and maintenance staff to use. The coding system is easer to use than reporting individual quantities of particles of each size range. This is further complicated as what is actually reported is the maximum contamination level to be found in only 1 ml (i.e. The ISO 4406:99 code system is based on the number of particles greater than three size ranges (4, 6, 14 microns or R4/R6/ R14) found in the equivalent of one millilitre of sample. That in itself does not mean there were 512 particles counted вЂ“ it actually means that the number of particles was between 2 8 (i.e. 512 number of particles and we would record the number 9 as the count. For example, if there was a count of 512 particles in a 100 ml sample of fluid that would be 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 or 2 9 i.e. The capability of direct imaging systems to capture the actual wear particle silhouette allows for an вЂAutomated FerrographyвЂ™ capability for wear particle classification. It is described by a number of particles related to the factor of 2. Along with particle shape morphology, direct imaging systems provide other particle counting output formats but ISO 4406 is the most common. The concept of particle counting can be confusing as it is not an actual precise count. If you have any questions do not hesitate to contact us at ISO 4406 Method Please see below a comprehensive explanation of the ISO 4406 method. Proper care should be taken during sample procurement to ensure that the sample obtained is representative of the fluid circulation within the system. These factors include procurement of sample, particle counting accuracy and the sample container (where used), and its cleanliness.

We will cease reporting to NAS1638 for all Marine applications. CAUTION Particle counts are affected by a variety of factors. Reporting at в‰Ґ4Вµ, в‰Ґ6Вµ and в‰Ґ14Вµ as opposed to the two digit code method of в‰Ґ5Вµ and в‰Ґ15Вµ. ISO CLEANLINESS CODE FOR HYDRAULIC FLUID CONTAMINATIONДЄs part of our program to continually evaluate industry standards to ensure the most accurate analysis for our customers we will now use the ISO 4406 (2017) 3 digit code standard for particle counting.