Grease Analysis
Dropping point of lubricating grease – ASTM D566
The apparatus, in acc. with ASTM D 566 – IP 132 – ISO 2176, is a benchtop model which houses the components and a Panel PC with touch screen. A software running under Microsoft Windows embedded permits to select the test method and the test parameters, run the test automatically, store, retrieve and print data, diagnose and calibrate the instrument offering in the meanwhile all the features of Windows systems such as LAN connectivity. A unique cooling system permits to cool down quickly the heating furnace allowing to start a new test in a few minutes.
The dropping point is the temperature at which the grease passes from a semisolid to a liquid state under the conditions of test. Cooperative testing indicates that in general, dropping points by test method D 566 is in agreement. The test, usually carried on with manually operated analyzers, has been totally automated with this instrument: in fact it provides automatically to regulate the heating rate, beginning with a 5.5°C/min rate and then reducing it to 1°C/min rate.
Grease worker – ASTM D217
The apparatus is in acc. with ASTM D 217 – IP 50 – ISO 2137. Worked penetration results may be used to establish the consistency of lubricating greases after prolonged working. The change in worked penetration results on a grease after prolonged working are believed to be a measure of its shear stability under the conditions of the test. The electrically operated grease working machine consists of a geared motor for 60 strokes/min mounted on a aluminium base with clamps to fix the grease workers. The number of strokes, continuously showed on a display, can be preset to stop the worker after any required number of strokes up to 100,000.
Oxidation stability of greases – ASTM D942
New automatic benchtop equipment acc. to ASTM D 942 available in 2, 4 or 6-position versions, with aluminum block heating. Vessels are equipped with pressure transducers, cables and quick connectors while the touch-screen interface plots pressure and temperature data on a chart and allows user to enter, save, retrieve, print test reports and run diagnostic and calibration routines. Ethernet and USB ports permit to connect to LIMS or printers.
Rolling thin film oven test of bitumens RTFOT – ASTM D2872
The apparatus, in acc. with ASTM D 2872 – EN 12607, consists of a forced air circulation oven suitable for temperatures up to 180°C and equipped with a rotating shelf placed inside along with a coil that preheats the air directed into the sample container.
This test is used to determine the effect of heat and air on a moving film of semi-solid asphaltic materials. The effects of this treatment are determined from measurements of the properties of the asphalt before and after having heated in a oven for 75 minutes at 163°C a moving film of asphaltic material while air at a rate of 4 l/min is directed against the sample.
Evaporation loss of greases and oils
The apparatus, in acc. with ASTM D 972 – IP 183, consists of a case containing a stainless steel bath and supporting precision flowmeters. The bath is equipped with a stainless steel cover with holes for the introduction of the evaporation cells
High temperature evaporation loss – ASTM D2595
The apparatus, in acc. with ASTM D 2595, consists of a case hosting the aluminium block and supporting precision flowmeters. The block has jackets for the introduction of the cups: the air preheater is in the bottom. Each position is equipped with a digital display, connected to a thermocouple, that continuously shows the temperature of the air coming out from the cell.
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