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ASTM D5293 for apparent viscosity of engine oils by Cold-cranking simulator
12. Procedure for Automated and Automatic Automated CCS Operation12.1 Establish the calibration equation as described in 10.2.12.2 For automatic automated CCS instruments, place a minimum of 55 mL of the sample to be tested into a 60 mL bottle(s) designed to fit the sample tray. For automated CCS instruments, ...
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ASTM D5293 for apparent viscosity of engine oils by Cold-cranking simulator
11. Procedure for Manual CCS OperationNOTE 6 - Ensure that the cooling bath is stirred during the operation of the instrument. Failure to do so will permit large gradients in temperature to exist in the cooling bath. These large gradients will affect the sample temperature and reduce the precision of ...
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ASTM D5293 for apparent viscosity of engine oils by Cold-cranking simulator
10. Calibration10.1 Calibration of Manual CCS10.1.1 On start-up of a new instrument or when any part of the viscometric cell or drive component (motor, belt, tachometer-generator, and so forth) is replaced, determine the required motor drive current. Initially, recheck the drive current (as described ...
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ASTM D5293 for apparent viscosity of engine oils by Cold-cranking simulator
9. Sampling9.1 To obtain valid results, use an appropriate means of bulk sampling (see Practice D 4057) to obtain a representative sample of test oil free from suspended solid material and water. When the sample in its container is received below the dew point temperature of the room, allow the sample ...
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ASTM D5293 for apparent viscosity of engine oils by Cold-cranking simulator
7. Reagents and Materials7.1 Acetone - (Warning - Danger - Extremely fammable. Vapors can cause fire.)7.2 Methanol - (Warning - Danger - Flammable. Vapor harmful.)7.3 Petroleum Naphtha - (Warning - Combustible vapor harmful.)7.4 Calibration Oils - Low-cloud point Newtonian oils of known viscosity and ...
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ASTM D5293 for apparent viscosity of engine oils by Cold-cranking simulator
6. Apparatus6.1 Two types of apparatus are available for use in this test method: the manual cold-cranking simulator (see 6.2) and the automated CCS (see 6.3 and 6.4).6.2 Manual CCS8, consisting of a direct current (dc) electric motor that drives a rotor inside a stator; a rotor speed sensor or tachometer ...
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ASTM D5293 for apparent viscosity of engine oils by Cold-cranking simulator
5. Significance and Use5.1 The CCS apparent viscosity of automotive engine oils correlates with low temperature engine cranking. CCS apparent viscosity is not suitable for predicting low temperature flow to the engine oil pump and oil distribution system. Engine cranking data were measured by the Coordinating ...
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ASTM D5293 for apparent viscosity of engine oils by Cold-cranking simulator
4. Summary of Test Method4.1 An electric motor drives a rotor that is closely fitted inside a stator. The space between the rotor and stator is filled with oil. Test temperature is measured near the stator inner wall and maintained by regulated flow of refrigerated coolant through the stator. The speed ...
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ASTM D5293 for apparent viscosity of engine oils by Cold-cranking simulator
3. Terminology3.1 Definitions3.1.1 Newtonian oil or fluid, n-one that exhibits a constant viscosity at all shear rates.3.1.2 non-Newtonian oil or fluid, n-one that exhibits a viscosity that varies with changing shear stress or shear rate.3.1.3 viscosity, , n-the property of a fluid that determines its ...
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ASTM D5293 for apparent viscosity of engine oils by Cold-cranking simulator
1. Scope1.1 This test method covers the laboratory determination of apparent viscosity of engine oils by cold cranking simulator (CCS) at temperatures between -5 and -35°C at shear stresses of approximately 50 000 to 100 000 Pa and shear rates of approximately 10(x5) to 10(x4) s(-1) and viscosities ...
