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.
|Published (Last):||24 January 2005|
|PDF File Size:||8.78 Mb|
|ePub File Size:||17.15 Mb|
|Price:||Free* [*Free Regsitration Required]|
Consistent analyses should be applied for each application. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of ashm standard. 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 astk of this monitoring wstm is to diagnose the operational condition of the machine based on fault conditions observed in the oil.
Such limits should be established in conjunction with advice and guidance from the machinery manufacturer and maintenance group.
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.
FTIR oil analyzing/measurement| Nitration FT-IR test| ASTM E
The units used for reporting are absorbance per 0. Great care should be taken when preparing these materials to avoid fire hazard or exposure to the vapors. Since no single product is formed, standard materials are not available to generate the calibration curves needed to relate absorbance to concentration.
While calibration to generate physical d2412 units may be possible, it is unnecessary or impractical in many cases.
The population should include a minimum of several hundred results for meaningful statistical analysis. Work Item s – proposed revisions of this standard. The particle size e2421 is affected by the engine type and lubricant.
No other units of measurement are included in this standard.
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.
A common method is to locate the secondary phase-delayed centerburst in the interferrogram xstm for the empty cell and remove it by computer manipulation. This creates a huge issue for some engines, mainly natural gas engines as they operate at higher combustion temperatures and therefore high Nitrous Oxides NOx are formed. This is not considered a problem because of the greater significance the presence of glycol has to engine operation.
Water and glycol should not be routinely calibrated locally because of the difficulty in making and analyzing standards.
NOTE 2—Peak maxima may be easily identified using second derivative spectra. No atsm units of measurement are included in this standard. Contaminants monitored include water, soot, ethylene glycol, fuels and incorrect 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. Features in atm infrared spectrum indicative of the molecular level components of interest 1,7 that is, water, fuel, antifreeze, additive, degradation, and so forth are measured and reported.
For results where the value decreases with time, the limits would be the average minus the corresponding number of standard deviations. Nitration occours when there is sufficient heat and pressure in the combustion chambers of the engines which breakes the atmospheric nitrogen molecule down to two atoms which thereafter react with oxygen to form Nitrous Oxides NOx.
Even though the peaks at and cm-1 are larger than the one at cm-1, it is axtm difficult to accurately measure them in the presence of other oil breakdown product. However, glycol has other characteristic peaks that differentiate it from water around, and cm-1 as can be seen in Fig. Glycol standards should be freshly prepared and analyzed. Water standards should be freshly prepared and analyzed.
ASTM E2412 – 10
A thorough discussion of distribution profile analysis and alarm limit determination is beyond the scope of this practice. As seen below in Fig. Testing Equipment used by us sstm our laboratory: NOTE 11—Ethylene glycol calibrations based on For soot, follow the specific recommendations in Table A2. In 6 E — 10 increases as the lubricant breaks down.
For this reason, the measurement area developed for monitoring levels and trends of ZDDP has been found to be equally useful for monitoring tricresyl phosphate TCP. Height to Negative peak height Area to Area to Verification peak: We need your help to maintenance this website. Please help us to share our service with your friends. 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 e2421 the oil.
Adequate mixing is necessary to obtain valid results. From a plot or table of the change in absorbance with time, judgments about asm to change the lubricant can be made.