Brookfield CAP1000 Viscometer - Manual (Page 16)

Brookfield Engineering Labs., Inc. Page 4 Manual No. M02-32A0607
III. OPERAtION
The CAP 1000+ Viscometer is delivered from the factory with two available speeds for opera-
tion at 750 rpm or 900 rpm. Information on how to access these speeds is detailed in section
II.3 “Speed Setting”. Your viscometer may operate at a different rotational speed based on what
was specified at the time of order. To determine what speed your viscometer has been set to,
power on the viscometer and note the operating speed on the main screen display.
III. Full scale Range and Accuracy of Measurement
Full Scale Range (FSR) viscosity is the maximum viscosity that can be measured and occurs
when the % torque is 100. Brookfield recommends that viscosity measurements be made be-
tween 10 and 100% torque.
There are two tables to consult for viscosity range information, depending on which torque
model viscometer you purchased. To determine which torque model you have, consult the se-
rial tag of your viscometer or the certificate of calibration that accompanied the instrument or
the display on power up.
23CAP 1000+ = Low Torque CAP 1000+ = High Torque
Full Scale Range (FSR) is based on the cone spindle your are using, the torque model of your
viscometer, and the speed of spindle rotation. The tables below provide information on FSR
by torque model for the most common factory set speeds:
Table III-1: Full Scale Range Viscosity for Low Torque CAP 1000+
Cone
Number
Cone
Range
Constant
shear Rate
Constant
FsR Poise
at 00
RPM
FsR
Poise at
70 RPM
FsR Poise
at 900
RPM
FsR Poise at any
RPM
01 1875 13.33N 0.83 0.11 .0597 1875/(22.7*N)
02 3750 13.33N 1.65 0.22 .165 3750/(22.7*N)
03 7500 13.33N 3.30 0.44 .330 7500/(22.7*N)
04 15000 3.33N 6.61 0.88 0.73 15000/(22.7*N)
05 30000 3.33N 13.22 1.76 1.47 30000/(22.*N)
06 75000 3.33N 33.04 4.41 3.67 75000/(22.7*N)
07 3150 2N 1.39 * * 3150/(22.7*N)
08 12500 2N 5.51 * * 12500/(22.7*N)
09 50000 2N 22.3 * * 50000/(22.7*N)
10 5000 5N 2.20 0.29 2.20 5000/(22.7*N)
N= RPM
Poise x 100 = centiPoise
*use of this cone at these RPM is not recommended