How do you calibrate a viscometer?

Ensure that all the connections of the instrument are proper. Turn the viscometer ON. Take out the viscosity standard solutions in 500 ml beaker, adjust the temperature to 250C. Attach the required spindle, adjust required speed & measure the viscosity, note down the constant reading.

How do you use the Cannon-Fenske Routine viscometer?

To charge the sample into the viscometer, invert the instrument and apply suction to tube G, immersing tube A in the liquid sample, draw the liquid into the capillary F. Adjust the liquid to mark E, turn the instrument to its normal vertical position and wipe clean.

What is Cannon-Fenske Opaque viscometer?

The Cannon-Fenske Opaque Viscometer measures kinematic viscosity of transparent and opaque Newtonian liquids according to ASTM D445, ISO 3104 and ASTM D2170. Minimum sample volume is 12 mL. Minimum bath depth is 230 mm (9 in). Calibrated viscometers include a certificate of calibration and instruction sheet.

How does a viscosity measure viscometer?

BACKGROUND

1. Ostwald viscometer is use to determine viscosity of Newtonian fluid.
2. η1 can be determine using following equation.
3. η1=ʆ1t1/ ʆ2t2 X η2
4. ʆ1=Density of unknown liquid.
5. t1 =Time of flow of unknown liquid.
6. ʆ2 =Density of standard liquid.
7. t2 =Time of flow of standard liquid.
8. η2=Viscosity of standard liquid.

How to calculate viscometer constants for other temperatures?

The viscometer constant at other temperatures can be obtained by interpolation or extrapolation. To obtain kinematic viscosity in mm2 /s( cSt) multiply the efflux time in seconds by the viscometer constant. To obtain viscosity in mPa . s (cP) multiply the kinematic viscosity in mm2 /s( cSt) by the density in grams per milliliter. .

How to calculate the viscometer constant for a cannon-Fenske routine?

For a Cannon-Fenske Routine viscometer, the following equation permits calculation of the viscometer constant C at any temperature from a viscometer constant determined experimentally at another temperature. C = Co (1 – B [ 1; – ~]) For a Cannon-Fenske Opaque viscometer, the following equation is used to obtain the viscometer constant C.

How is the constant ( k ) of viscosity determined?

The constant (K) of the instrument is determined on a liquid of known viscosity. The apparatus consists of a glass suspended-level viscometer (see Fig.) made of clear borosilicate glass and constructed in accordance with the dimensions shown in the figure and in Table 2.

Is there an expiration date for a viscosity constant?

Although a single standard is sufficient to obtain a constant, the use of two standards covering the capillary range yields a more robust calibration constant. Viscosity standards have an expiration date and should not be used beyond that date. A calibrated viscometer can be purchased with constants at appropriate temperatures.