What is the 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 do the 3 numbers in an ISO oil analysis particle count represent?
Results from an oil cleanliness testing are typically reported in a three number format such as 20/15/11, where 20 represents the range code representing the number of particles that are 4 microns and larger, 15 the range of particles that are 6 microns and larger, and 11 represents particles 14 microns and larger.
How do I read ISO 4406?
The first number will never be smaller than the second number and the second number will never be smaller than the third number because each number includes the particles in the next group. The second number represents the range of particles that are 6 µm and larger.
What is PQ Index in oil samples?
The PQ Index is a relative measurement of the total Ferrous (Iron) metal content of your oil regardless of the size or shape of the debris by means of detection by a magnetic field. The higher the PQ index reading in a sample the higher the total concentration of ferrous material generally associated with wear.
What is oil particle count?
Particle counting is a valuable part of any oil analysis program as the use of clean oil cannot be emphasized enough. This test employs a laser particle count instrument that counts the number of particles in a specific size range per a given volume of sample.
What does ISO 4406 mean?
ISO 4406:99 is the reporting standard for fluid cleanliness. According to this standard, a code number is assigned to particle count values derived at three different micron levels: greater than 4 microns, greater than 6 microns and greater than 14 microns. The ISO code is assigned based upon Table 1.
What is a Class 7 clean room?
ISO 7 Cleanrooms. An ISO 7 clean room (Class 10,000 cleanroom) is a hard-sided wall manufactured facility that utilizes HEPA filtration systems to maintain air cleanliness levels of a maximum of 10,000 particles (≥0.5µm) per cubic foot.
What do the ISO cleanliness codes mean?
The ISO cleanliness codes are derived from International Standard ISO 4406:2017. 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.
What is ISO ISO 4407 oil cleanliness?
ISO 4407 – Oil Cleanliness Oil cleanliness is a measure of the level of particle contaminants in the oil, including both insoluble and hard particles. Acceptable oil cleanliness levels are often determined by Original Equipment Manufacturer (OEM) recommendations and can be controlled through proactive maintenance methods.
What is the ISO 4406 code?
ISO 4406:99 is the reporting standard for fluid cleanliness. According to this standard, a code number is assigned to particle count values derived at three different micron levels: greater than 4 microns, greater than 6 microns and greater than 14 microns. The ISO code is assigned based upon Table 1.
How do you count particles in ISO 4407?
ISO 4407: In this method, the oil sample is passed through a very fine filter patch to capture particles. An optical microscope is then used to count the particles that are between 5 and 15 µm. This method was one of the original methods used for particle counting, but it is extremely time-consuming and is rarely used today.