Oil Analysis Report
Oil Analysis Report can help you get the most out of your lubricant and equipment. Oil analysis is a very useful tool and knowing how to read your oil analysis report is critical to your maintenance program’s success.
An oil analysis report includes a wealth of information on your equipment, lubricant, and procedures. Each item found can assist you in determining which pollutants have invaded your system and underlying issues are creeping up. Understanding how the oil tests work helps you to get the most out of your Oil Analysis Program.
An Oil Analysis Report is a critical component of a successful operation. Knowing how to examine the oil analysis report and looking beyond the report summaries can assist in minimizing equipment malfunction and needless teardowns.
Elements analysis is perhaps the most basic test in the oil analysis toolkit. Elemental analysis works by stimulating atoms using a high-energy source in AES, such as iron atoms from wear debris, zinc atoms from a ZDDP additive molecule, or silicon from silica (dust) contamination. The atoms absorb energy from the excitation source and undergo a high-energy electronic state transformation. Atoms do not like staying in these excited states and quickly lose the energy they have obtained, primarily through releasing light energy, according to quantum physics principles. The atom’s electronic structure determines the energy of emitted light, which varies among different types of atoms because it is inversely proportional to the light’s wavelength.
What to Do When Your Analysis Goes South
Be Familiarized with the Units of Measure
A ppm (parts per million) measures the amount of an element per million parts of a sample. 1 ppm is about one ounce per 6,500 gallons of oil. In oil analysis, ppm values can range from a few for wear metals and pollutants to thousands for additives. Calibration standards relate light absorption to known concentrations, enabling calculation of unknown sample levels via calibration curves.
Monitor the Data Trends
Focus on trends over time in elemental analysis, as wear rates vary by machine, oil, age, and usage. Rate-of-change studies help detect early wear and contamination.
Anatomy of an Atomic Emission Spectrometer
Commercial analysis laboratories typically employ one of two types of atomic emission spectrometers: an inductively coupled plasma (ICP) or a rotating disc electrode (RDE) device. The main difference between the two is that the high-energy source vaporizes the sample and stimulates the atoms. In an ICP apparatus, the oil is fed into a high-temperature argon plasma, where the atoms vaporize, become excited, and then emit light. In contrast, an RDE spectrometer, also called an “Arc-Spark” device, vaporizes and stimulates the oil using a high-voltage discharge between an electrode and a revolving carbon disc.
The remainder of the instrument remains essentially the same, whether it is an ICP or RDE spectrometer. The system collects and focuses the light emitted by the excited atoms onto the spectrometer’s slits. A diffraction grating, similar to a prism, separates light of different wavelengths or colors into discrete wavelengths based on their diffraction angle within the spectrometer. A light-sensitive photodiode measures the light intensity at each angle, known as a channel. We then convert the photodiode’s voltage signal into a concentration value in parts per million (ppm) using a straightforward calibration method.
Proper calibration ensures that both types of equipment deliver virtually the same data accuracy. There is, however, one significant distinction between ICP and RDE devices. Size limitations affect both the ICP and RDE devices. This phenomenon limits the size of particles that traditional AES can measure. ICP can measure only particles smaller than around 3 microns. The limit for RDE instruments is significantly greater, at about 8 to 10 microns.
Remember to Read the Labels
Make sure your reports are exact and correct when you open them. It is possible to make mistakes, but it is also possible to prevent them.Check the lubricant’s manufacturer and type, the oil’s viscosity grade, the service date of the unit, and whether you changed the oil or added new oil. Now that you know who owns the analysis reports, it’s time to find out what’s going on in your unit.
Always remember to compare the data to previous findings, since a poor diagnosis indicates that something has changed from previous trends. Don’t simply focus on the problematic figures; attempt to see the larger picture. If an issue occurs, the report will likely document it elsewhere. It might just be an analytical mistake if no other trend upsets are visible.
Contact the lab if you feel this is the issue or if you need clarification on other test findings. Most laboratories would gladly listen to any concerns and, if necessary, perform tests or propose further confirmatory studies that consumers may not be aware of. The second stage entails determining the problem’s urgency. When abnormal findings just exceed the alert threshold, a simple examination may suffice. Therefore, you should repeat the test after half the normal analysis period. If the critical limits are breached, a problem has likely occurred.
Cross-Examination of Oil Analysis Report
After you’ve figured out what’s wrong, you’ll need to examine the machine more closely. Visit the machine with a group of operators, lube technicians, and mechanics. Standing beside the equipment can trigger memories that are often forgotten in a control room or workshop. Ask the operators if they made any changes to their operating habits. Also, inquire with the lube technician about how they collected the sample. If the regular lube technician did not take the sample, that could be the key to solving the issue.
Determine if any oil changes or top-ups were unrecorded. You may need to gather information from workers working different shifts and expect a large list of individuals to contact. Ask the mechanics whether they made any repairs or alterations before the previous sample, especially on the exterior of the equipment. For example, an arc welder with a badly positioned or connected ground wire has been known to cause damage.
Inquire about any nearby construction activities, as high vibrations or strains caused by poorly designed pipework can also contribute to lubricant problems. These environmental factors may impact the equipment’s performance and the integrity of the lubricant.
Take Action
Now that there is adequate evidence to determine whether or not environmental change occurred. The machine must then be inspected. Inspect the sight glass and breather, then take a temperature reading and monitor for any unusual vibrations. Collect a sample for visual inspection, checking for sediments, water, soil, or metal contamination. If a visual inspection reveals that anything is wrong, sending a sample to the lab is generally unnecessary. Before doing another lab analysis, take urgent remedial action such as filtration, vibration, or thermography.
If there is a mechanical or environmental issue, the procedures for resolving it should be obvious. A confirming sample may be required, although it is not required if the answer is obvious. If nothing appears to be out of whack, obtain a confirmatory sample and send it to the lab right away. Order the complete set of tests and seek guidance from the lab. You’ll need to retest once you’ve figured out what’s causing the issue and fixed it. Continue to retest at regular intervals until the problem is resolved.
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