Cannon-Fenske Routine

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Cannon-Fenske Routine

The Cannon-Fenske Routine viscometer is a rugged and inexpensive viscometer that works well if the liquid to be measured is transparent or translucent.

In general, if the meniscus (the curvature at the top of the liquid column) can be readily observed through a column of liquid 3-mm in diameter, the Cannon-Fenske Routine viscometer and other transparent-type viscometers (such as the Zeitfuchs Transparent and BS/U-Tube viscometers) can be used.

Reverse Flow Viscometers

Special reverse flow viscometers have been designed for testing opaque liquids.

Reverse flow viscometers wet the timing section of the viscometer capillary only during the actual measurement.

The Cannon-Fenske Opaque, Zeitfuchs Cross-Arm, and BS/IP/RF U-Tube viscometers are all reverse flow types.

Reverse flow viscometers must be cleaned, dried, and refilled before a repeat measurement can be made.

By contrast, other viscometer types commonly used to measure transparent liquids allow the same sample to be repeatedly drawn up into the capillary, permitting multiple measurements for verification.

CANNON-FENSKE OPAQUE VISCOMETERS

Reverse-flow type for dark liquids

Calibrated CFOC Series

Reverse-flow type, for measurement of kinematic viscosity of dark Newtonian liquids according to ASTM D 445 and ISO 3104. Permit measurements of liquids whose meniscus cannot be seen at the timing marks when using Cannon-Fenske Routine-type viscometer.

Used to measure kinematic viscosity of liquid (cutback) asphalts and road oils at 60°C (140°F) in range of 30 to 6000 centistokes according to ASTM D 2170.

Also used to study lubricating oils at low temperatures when investigating the effect of various additives on lubricating and hydraulic oils.

External pressure can be applied to vary shear stress and shear rate. Specifications conform to ASTM D 446 and ISO 3105.

Provided with certificate of calibration and instruction sheet.

Minimum sample volume 12 mL.
Require liquid bath depth of 229 mm (9 inches).
Size 25 has approximate constant 0.002 cSt/s and range of 0.4 to 2 cSt.
Constants and ranges for other sizes are as given in Table 1.
Holder is not supplied. For holders, see 9726-M50 and -M53.
For replacement micro stoppers, see 9726-N98.
Viscometers with special constants are available by special order at additional cost.

Uncalibrated CFOU Series

Similar to 9721-F50 series, but uncalibrated.

Holder is not supplied. For holders, see 9726-M50 and -M53.

CANNON-FENSKE ROUTINE VISCOMETERS

Calibrated CFRC Series

For measuring kinematic viscosity of transparent Newtonian liquids, particularly petroleum products

or lubricants, according to ASTM D 445 and ISO 3104.

Specifications conform to ASTM D 446 and ISO 3105.

Provided with certificate of calibration and instruction sheet.

Minimum sample volume 7 mL. Require liquid bath depth of 203 mm (8 inches).
Constants and ranges are as specified in Table 1.
Holder is not supplied. For holders, see 9726-M50 and -M53.
Viscometers with special constants are available by special order at additional cost.

Uncalibrated CFRU Series

Similar to 9721 B50 series, but uncalibrated.