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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Different laboratories have developed slight variations on these analyses.
In 6 E — 10 increases as the lubricant breaks e2421. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
From a plot or table of the change in absorbance with time, judgments about when to change the lubricant can be made. NOTE 10—Fuel calibrations are based on weathered fuel and need to be adjusted for local variation in fuels. Oxidation, nitration and sulfonation of base stocks are monitored as evidence of degradation.
Please copy and paste this embed script to where you want to embed Embed Script. Water standards should be freshly prepared and analyzed. For example, infrared zstm cannot determine wear metal levels or any other type of elemental analysis.
The baseline for carbonyl oxidation measurement, referred to as oxidation, is taken at cm-1 and the maximum peak height between and cm-1 is determined. NOTE 9—Calibrated methods are based on standard linear regression models. This is why weathered fuel should be used to calibrate the system and calibration of fuel should be done based on fuels obtained regionally.
The objective of this monitoring activity is to diagnose the operational condition of the machine based on fault conditions observed in the oil. 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.
The measurement listed can be used as a guideline but is not intended to be the only infrared based fuel contamination measurement.
The footnotes to Table A2. Beyond this point the behavior of water in petroleum lubricants becomes very nonlinear when measured in lubricating oil by an optical measurement technique such as infrared.
FTIR oil analyzing/measurement| Nitration FT-IR test| ASTM E
NOTE 2—Peak maxima may be easily identified using second derivative spectra. Instead, an offset of the spectral baseline due to light scattering and absorption is observed. Therefore, when glycol is present, e22412 can be detected but not reliably quantified using FT-IR.
Contaminants monitored include water, soot, ethylene glycol, fuels and incorrect oil. However, glycol has other characteristic peaks that differentiate it from water around, and cm-1 as can be seen in Awtm.
These have been identified as lactones, esters, aldehydes, ketones, carboxylic acids, and carboxylate salts.
ASTM E2412 – 10
NOTE 1—Calibrated methods for water and ethylene glycol are developed using standard preparations of water or ethylene glycol in appropriate used oil matrices.
No other units of measurement are included in this standard.
Nitration Testing Equipment used by us in our Laboratory. The materials leading to this feature are nitrate esters. We are a non-profit group that run this website to share documents.
This practice is designed for monitoring in-service lubricants and can aid in the determination of general machinery health and is not designed for the analysis of lubricant composition, lubricant performance or additive package formulations.
The increase in peak height that occurs as the number of hours the oil has been run in the engine increases has significance in the measurement of degradation related to TAN and viscosity.
E – Free Download PDF
Quantification of gasoline is calibrated using a peak area over the range of to cm As this area is closely associated with the water measurement area, a localized, single—point baseline at cm-1 provides a correction for low e242 of water buildup Fig. More detailed descriptions can be found in Ref 1. Atm 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.
Originally approved in Astj has a lower boiling range and a higher percentage of aromatic material. Thus, the fringe pattern essentially disappears from the spectrum. Conventional methods such as gas chromatography or flash point make use of the lower boiling range, while the infrared approach examines the aromatic atsm to indicate if fuel is present.
Please help us to share our service with your friends. Alternatively, the water maximum can be measured relative to a two-point baseline drawn from cm-1 to cm Therefore, when glycol is present, water cannot be reliably quantified using the FT-IR measurement.
Because the soot absorbance obtained is a measure of the amount of tilt in the spectral baseline, a correction should be ast, to the data to account for the contribution of the transmission cell to the baseline tilt if the background is taken without the cell in the beam path.