placed in context of the recently approved ASTM Practice E alternative means of executing this ASTM Practice, its objective being to minimize . E – Download as PDF File .pdf), Text File .txt) or read online. Referenced Documents ASTM Standards:3 D Test Method for Kinematic Viscosity. improper air/fuel ratio. There are test methods for laboratory grade FTIR measurement as well as for portable field testing. ASTM E describes the standard.
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Such limits should be established in conjunction with advice and guidance from the machinery manufacturer and maintenance group.
Max ht to Max ht to 1 point at 2 point: Astmm testing of Nitration is done in our laboratory by using FTIR Fourier transform infrared spectrometer, which can be coupled with Acid Number Test and Viscosity to determine the extent of nitration and degradation of the oil. Water contamination is manifested as a general, horizontal baseline offset of the entire infrared spectrum.
This practice is designed for asym in-service lubricants and can aid in the determination ast general machinery health and is not designed for the analysis of lubricant composition, lubricant performance or additive package formulations. However, this is not necessary, as lubricant condition monitoring requires only reliable, repeatable measurements. The most common degradation pathway in ester based lubricants is the conversion of the ester into organic acids and alcohols.
Typically a warning or alert level will be used as an early indication of a potential problem, and an alarm level will be used as an indication of the need for immediate corrective action. NOTE 3—Water measurements can be adjusted for glycol content. For this reason, the measurement area developed for monitoring levels and trends of ZDDP has been found to d2412 equally useful for monitoring tricresyl phosphate TCP.
Work Item s – proposed revisions of this standard. While a mean and standard deviation can still be calculated, e24112 user should verify that alarm limits based on these statistics are descriptive of the actual distribution.
Warning or alarm limits the point where maintenance action on a machine being monitored is recommended or required can be determined through statistical analysis, history of the same or similar equipment, round robin tests or other methods in conjunction with correlation to equipment performance.
A wider range for the baseline points can be used to achieve better sensitivity, although this caused a reduction in the selectivity. Work is currently active on other IR measurement areas and techniques. Spectral characteristics of noted fuels have been found to vary.
For example, infrared spectroscopy cannot determine wear metal levels or any other type of elemental analysis.
However, the converse asym not true since glycol has other spectral features that are used for detection and quantification. Contaminants monitored include water, soot, ethylene glycol, fuels and incorrect oil. Water standards should be freshly prepared and analyzed.
Through normal blow-by, when nitrogen oxide products enter the lubricant, the react with the moisture and become acidic in nature and rapidly accelerate the oxidation rate of the oil.
Min to Min to Min to As noted in 9. These warning or alarm limits can be a fixed maximum or minimum value for comparison to a single measurement or can also be based on a rate of change of the response measured 1.
In these systems, the most common parameters measured are water contamination and oxidative breakdown of the oil, which are presented in Table A1. NOTE 2—Peak maxima may be easily identified using second derivative spectra. This annex merely provides a summary of distribution profile analysis for the interested user. A vertical bar is used to represent the number of oils for which the test result falls between the two abscissa values.
The footnotes to Table A2. We are a non-profit group that run this website to share documents.
Level Zero and Level One Tests. More levels may be used, but at the expense of increased complexity. Absorbance values related to the thickness of sample exposed to light e2142 reported. Diesel fuel is brought to approximately degrees Centigrade then held at this temperature for 30 minutes.
E – Free Download PDF
The main difference between the fuel and base oil is in molecular weight or boiling range and the relative percentage of aromatic materials.
The materials leading to this feature are nitrate esters. As with fuel, the presence of glycol can be confirmed by gas chromatography or a colorimetric test, or more commonly, corroborated using elemental analysis results for sodium and boron. Please fill this form, we will try to respond as soon as possible. As previously noted, building calibration curves for measurement parameters when pure or prepared standards are available is possible. Under severe conditions of lubricant degradation, this band will begin to overlap and contribute to the integrated water measurement area.
The objective of this monitoring activity is to diagnose the operational condition of the machine based on fault conditions observed in the oil. Link to Active This link will always route to the current Active version of the standard. The practice as presented is not intended for the prediction of lubricant physical properties for example, viscosity, total base number, total acid number, etc.
ASTM E – standard practice for Condition Monitoring of Used Lubricants by FT-IR Spectrometry.
Wear metal analysis, particle counting or other applicable tests should condemn gear and hydraulic systems that manifest such extreme particulate levels. An independent test, such as viscosity change, flash point, or gas chromatography can be used to confirm an indication of fuel presence in the FT-IR spectrum of the oil. This component is monitored as a negative peak in the difference spectrum since the new oil will contain a greater concentration of the additive than the in-service oil.
A number of physical property tests complement wear metal analysis and are used to provide information on lubricant condition for example, Test Methods D, D, and D The baseline shift caused by soot is affected by the amount of soot present and the effective particle size. In addition, multiple frequency distributions may also be required and are not given here.
Area to Height at Height at Verification peaks: