A short distance further on is another sensor that stops the timer as the oil passes it. As the oil passes the sensor a timer is started. The oil flows down the tube under the force of gravity until it reaches an electronic sensor at the bottom of the tube. A series of viscometer tubes are immersed in the bath. The viscometer bath contains silicone oil that is kept at constant temperature (to within one twentieth of a degree). The Kinematic viscosity of an oil is determined by testing an oil sample in a kinematic viscometer at a set temperature. Since so many events can affect viscosity, care must be taken not to evaluate the viscosity as a singular value, but to consider other test results that might provide clues as to why a viscosity did or didn’t change (such as Acid Number (AN), fuel dilution, oxidation, etc.). Viscosity is one of very few tests that indicates a problem when it is too low or too high. Viscosity gives us indications of oxidation and other thickening processes from oil degradation, fuel contamination in liquid-fueled engines, addition of incorrect lube and much more. By multiplying the time measured by the tube factor a viscosity in centistoke (cSt) is calculated. The oil is started flowing and the time for the oil to pass by two regions on the tube is measured. Viscosity is performed by adding a preset volume of oil to a calibrated viscosity tube which is immersed in a temperature controlled bath (typically either 40☌ for industrial oils and other fluids, or 100☌ for engine oils). Viscosity is the most important single property of a lubricant. MLT1 - Machinery Lubrication Technician.Professional Memberships & Associations.> Membrane Patch Colorimetry - ASTM D7843. Power Industry (Steam, Gas, Aero-Derivative Turbines).A Wright Method and the Chart Blending Method Provides Cold-Cranking Simulator (CCS) and Mini- Rotary Viscometer (MRV) viscosity calculations Calculates conversions between centistokes and Saybolt or Krebs units Enables VI calculations from kinematic viscosity measurements at any two temperatures Generates kinematic viscosity interpolation reports, and displays SAE and ISO VG Lubricant Specifications tables Provides an interface for analysis of Cold-Cranking Simulator and Mini-Rotary Viscometer data Provides temperature probe constant calculations. Performs oil blending calculations using the W. The version 2 release of VISDISK has added a graphing capability and an NBS “best-fit” computation that analyzes multiple kinematic viscosity data points and selects the optimum viscosity curve for the sample data provided. Test data can also be used to generate a complete interpolation report at temperature increments specified by the user. An interpolation component calculates viscosity at any specified temperature or temperature at a desired viscosity. VISDISK facilitates calculation/verification of kinematic viscosity by providing a data table for input, and then performing complex viscosity and density calculations. VISDISK also provides supporting data analysis capability for several equipment items manufactured by CANNON, including the PolyVISC, Cold-Cranking Simulator (CCS), Bending-Beam Rheometer, and the CANNON Mini-Rotary Viscometer (CMRV). The VISDISK program brings computerized solutions to many difficult computational problems associated with kinematic viscosity determination.
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