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Certified Standard Oils

Article No. 4002

Viscosity Standard C35

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Technical Attributes

    Technical Specifications

  • Zahn Cup No.
  • Kinematic Viscosity
    66 cSt
  • Ford Cup Drain Time
    64 / 35 sec
  • Ford Cup No.
    2 / 3
  • Zahn Cup Drain Time
    33 sec


  • Place flow cup in a precisely horizontal position using ring stand or temperature control jacket
  • Close orifice
  • Pour in test liquid
  • Draw a clean glass plate over the rim of the cup, removing superfluous liquid into the overflow reservoir and closing the cup
  • Remove glass plate horizontally
  • Open the orifice and start the stopwatch simultaneously
  • Stop the watch with the first break in the efflux stream
  • Repeat the measurement three times, each with a new sample of the same material
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