![]() The higher particle counts are a result of the enhanced sensitivity of scanning electron microscopy when compared to optical microscopy performed in the 1960s. #ISO 4406 PARTICLE COUNT ISO#Their analyses show a significant difference in the particle size distribution of ISO MTD as measured with an electron microscope compared to previous results with an APC calibrated per ISO 4402 (see Figure 1).įigure 1 shows significantly more particles at sizes below about 10 µm were observed by NIST than with the ACFTD calibration. This effort resulted in NIST Standard Reference Material SRM 2806 consisting of a suspension of ISO MTD in MIL-H-5606 hydraulic fluid. In 1993, NIST undertook an effort to certify the particle size distribution of suspensions of ISO MTD as a reference material for APC calibration. ISO 12103-A3 Medium Test Dust (ISO MTD) was selected as the best candidate. Therefore National Fluid Power Association (NFPA) and ISO standards committees began to develop a revised APC calibration method based on a new contaminant whose particle size distribution could be NIST traceable. Also, in 1992, AC Rochester discontinued manufacturing ACFTD. The method, using AC Fine Test Dust (ACFTD), ultimately became International Standard ISO 4402, and is still in use today by most oil analysis laboratories around the world.įor some time, industry had been aware that when more sophisticated instruments such as scanning electron microscopes are used to analyze the ACFTD, a substantial increase in the numbers of particles (especially below 10 µm) are reported compared to the distribution based on optical microscopes, given in ISO 4402. In the late 1960s a calibration procedure was developed to ensure that particle counts obtained with an APC agreed as closely as possible with counts obtained by optical microscopy. This article presents an introduction to the new calibration method including the impact on resultant particle sizes, particle counts and contamination classes.ĪPCs have generally replaced optical microscopy as the primary method for quantifying particulate contamination in fluid wetted systems. The changes are primarily the result of a new method for calibrating liquid automatic particle counters (APCs) that is traceable to the National Institute of Standards and Technology (NIST), but unfortunately produces a substantially different calibration. Three new or revised ISO fluid power standards will have a major impact on such programs. These programs include particle counting. Because of this, most companies have established programs to monitor and control contamination. Calibration: Standard: ISO/DIS11171:1999ġ3.Fluid contamination is a primary root cause of mechanical component wear and reduction in system reliability and performance. Humidity: working under the relative humidity of 20-85%, no condensation storage humidity 98% ġ2. Applicable power: 220V rechargeable battery spare 4 hoursġ0. Temperature: oil temperature 0-90 ° C instrument ambient temperature -25 ° C -50 ° C instrument case temperature 0-40 ° C storage temperature -40-70 ° CĦ. Online oil pressure: O.3-3Mbar (low pressure), 3-30Mbar (high pressure)Ĥ. ![]() Optional oil moisture meter for simultaneous testing of oil particles and moisture.Ģ. Small in size, light in weight and easy to carry, it is one of the most cost-effective instruments of its kind in the world.ġ1. The built-in printer can print historical detection data or data being detected at any time.ġ0. Large touch screen LCD display for user operation and data display.ĩ. The trend of oil pollution can be seen through the pollution degree curve.ħ. The NAS, ISO, GJB pollution levels can be displayed in numbers, charts, etc.Ħ. Data USB transmission, system upgrade, etc.ĥ. Built-in PC, you can easily conduct comprehensive data query without connecting to another computer.Ĥ. There are online and sampling testing model, which can be used in both the laboratory and online.ģ. ![]() The laser sensor has high detection accuracy.Ģ. Can be widely used in aerospace, electric power, petroleum, chemical, transportation, port, metallurgy, machinery, automobile manufacturing and other fields.ġ. #ISO 4406 PARTICLE COUNT PORTABLE#This portable ISO 44 oil paritcle counter can detect aviation kerosene, mineral oil, synthetic oil, phosphate oil and water solution, including hydraulic oil, lubricating oil, transformer oil (insulating oil), turbine oil, gear oil, engine Oil, etc. KR-B oil particle counter is portable type, can be used to detect the amount and distribution of solid particles in the solution, for example: can be used for on-line monitoring, can also be used for off-line detection of sample bottles (lab mode), can also be used for monitoring the filter effect of the filter and other occasions.
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