Brookfield CAP2000 Viscometer Uživatelský manuál stáhnout pdf (Strana 19)

Brookeld Engineering Labs., Inc. Page 19 Manual No. M02-313-G0812

Table III-2: Full Scale Range Viscosity for HIGH TORQUE CAP 2000+ Viscometer

Cone

Number

Cone

Constant

Range

Shear

Rate

Constant

FSR Poise

100 RPM

FSR Poise

400 RPM

FSR Poise

750 RPM

FSR Poise

900 RPM

FSR Poise

any RPM

01 1875 13.33N 18.75 4.69 2.50 2.08 1875/(N)

02 3750 13.33N 37.50 9.38 5.00 4.17 3750/(N)

03 7500 13.33N 75.00 18.75 10.00 8.33 7500/(N)

04 15000 3.33N 150.00 37.50 20.00 16.67 15000/(N)

05 30000 3.33N 300.00 75.00 40.00 33.33 30000/(N)

06 75000 3.33N 750.00 187.50 100.00 83.33 75000/(N)

07 3150 2N 31.50 7.88 N/A* N/A* 3150/(N)

08 12500 2N 125.00 31.25 N/A* N/A* 12500/(N)

09 50000 2N 500.00 125.00 N/A* N/A* 50000/(N)

10 5000 5N 50.00 12.50 6.67 5.56 5000/(N)

N= RPM

Poise x 100 = centiPoise

*Use of this cone at this RPM is not recommended

You can also determine FSR for any speed selection that is not in the above tables by doing a

simple calculation:

• For Low Torque CAP instruments:

Cone range constant / (22.7 * N) = FSR (Poise) where N = RPM

• For High Torque CAP instruments:

Cone range constant / N = FSR (Poise) where N = RPM

The last column in the above tables shows this calculation.

III.2 Accuracy of Viscosity and Temperature

The following tables indicate the accuracy of the viscosity measurement for the CAP 2000+

Viscometer using CAP spindles 01-10. This accuracy depends on both the rotational speed of the

cone and the percent of Full Scale Range (%FSR) in Poise at which the viscosity is measured.

Accuracy is stated in Poise (P) and is calculated as a % of the FSR viscosity.

To calculate accuracy:

• Determine FSR viscosity in Poise for the torque model, cone spindle, and speed of rotation,

using the information in Tables III-1 or III-2.

• Find the column that best denes the speed of rotation used for the measurement and your

reported % FSR from the measurement.

• Consult the table below to determine the accuracy of your measurement.

• Multiply the accuracy by the FSR viscosity if you need your accuracy stated in Poise.

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 36 37

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