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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Diesel fuel is brought to approximately degrees Centigrade then held at this temperature for 30 minutes.
It is better to make a choice of lubricant type and use it consistently if the oil type is not known. Great care should be taken when preparing these materials to avoid fire hazard or exposure to the vapors.
FTIR oil analyzing/measurement| Nitration FT-IR test| ASTM E
Wear metal analysis, particle counting or other applicable tests should condemn gear and hydraulic systems that manifest such extreme particulate levels.
In addition, many aero-derivative gas turbines are used in power generation, marine transport and other non-aeronautical applications.
The practice as presented is not intended for the prediction of lubricant physical properties for example, viscosity, total base number, total acid number, etc. This ester base-stock breakdown II area is also monitored as a measurement of degradation of the polyol ester lubricants.
While calibration to generate physical concentration units may be possible, it is unnecessary or impractical in many cases. This band is a fairly specific measure of over basing additive consumption and directly relates to the TBN assay for engine oils. These different approaches are equally valid for trending but will produce results that differ numerically.
The objective of this monitoring activity is to diagnose the operational condition of the machine based on fault conditions observed in the oil. Water and glycol should not be routinely calibrated locally because of the difficulty in making and analyzing standards. Height to Peak closet to in range of Max.
E – Free Download PDF
Calculations should be made based on the actual amount of glycol-based antifreeze added, not on the amount of the The practice as presented is not intended for the prediction of lubricant physical properties for example, viscosity, total base number, total acid number, etc.
However, typical gearboxes and hydraulic systems will not contain particulate levels high enough to cause a significant baseline offset and tilt. 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 If the oil is exposed to severe nitration conditions, the nitration products in the oil will astmm A number of physical property tests complement wear metal analysis and are used to provide information on lubricant condition for example, Astj Methods DDand D Do not use plastic containers.
This annex merely provides a summary of distribution profile analysis for the interested user. We need your help! The point of maximum intensity will vary as the oil and conditions of its use are changed. However, the converse is not true since glycol has other spectral features that are used for detection and quantification.
This fact makes it difficult to directly assess or calibrate the quantity of soot, so factors that relate the amount of soot to the infrared absorbance value must be established with the engines and lubricants of interest.
The measurement areas given in Table A1.
Such limits should be established in conjunction with advice and guidance from the machinery manufacturer and maintenance group. In particular, liquid nitrogen cooled Mercury Cadmium Telluride MCT detectors are known to exhibit significant nonlinearities.
Alternate source, beamsplitter and detector combinations covering this range are commercially available but have not been investigated for use in this practice. The objective of this monitoring activity is to diagnose the operational condition of the machine based on fault conditions observed in the oil. While soot has ast, specific frequency of absorption in the infrared spectrum, it causes a shift in the baseline of the spectrum due to absorption and scattering of light.
ASTM E2412 – 10
Increase in viscosity due to thickning of the oil Increase in the acidity of the oil resulting in increase in Acid Number AN Increase in insolubles. NOTE 10—Fuel calibrations are based on weathered fuel e212 need to be adjusted for local variation in fuels. The baseline shift caused by soot is affected by the amount of soot present and the effective particle size. A peak area over this range is used as is depicted in Fig.
For example, infrared spectroscopy cannot determine wear metal levels or any other type of elemental awtm. If the empty cell is used to create the background spectrum, or when a ZnSe cell with exactly parallel windows is used to collect the sample spectrum, these fringes will appear to be in the absorbance spectrum of the oil.
Oxidation, nitration and sulfonation of base stocks are monitored as evidence of degradation. Water is measured as depicted in Fig. Mixing, sonicating or mechanical shaking for at least 15 minutes astk considered adequate.
A baseline point at cm-1 is used. NOTE 4—Soot calculated from unsubtracted sample spectrum.