Brookfield Engineering Labs., Inc.
Page 23
Manual No. M02-33E209
Note:
A cone calibration should be performed when: 1) using a new cone for the first time,
2) switching between two cones of the same number and 3) verification of calibration
provides data outside of the acceptable range.
Refer to Tables III-5 and III-6 to choose the calibration fluid for the spindle being calibrated.
1. Turn on the CAP 2000+ Viscometer.
2. Attach solvent trap to coupling shaft.
3. Attach spindle.
4. Place appropriate amount of sample onto the center of the Viscometer plate directly below
the spindle.
5. Pull down the handle, locking it into the lowest position, placing the spindle in contact with
the plate.
6. Lower the solvent trap.
Note:
The solvent trap must be utilized when calibrating to ensure proper temperature
control.
7. Select the spindle to be calibrated by using the
SPINDLE
key.
8. Select
YES
for
CALIBRATE
and press
ENTER.
9. Enter the appropriate values for temperature
(°C)
and viscosity
(cP)
value printed on the
label.
Note:
Viscosity values are always entered in units of
CENTIPOISE (cP)
no matter what
units have been selected as unit of measure for normal operation.
100 cP = 1P; 1cP = 1mPa•s; 1000 cP = 1Pa•s
Note:
The Viscometer temperature control must be identical to the specified temperature for
the viscosity standard when executing the calibration. Normally calibration will be at
25°C for “L” Series CAP Viscometers and 60°C for “H” Series CAP Viscometers.
10. Allow at least 30 minutes for thermal equilibrium of the plate, calibration fluid and spindle,
from instrument cold start.
11. Select the spindle speed.
All of the spindles used with the low torque CAP 2000+ instruments should be calibrated
at 100 RPM when using the recommended viscosity standard fluids. This practice will
calibrate the instrument at approximately the middle of the Full Scale Range.
Spindles used with the high torque CAP 2000+ and the recommended viscosity standard
fluids may be calibrated at any speed.
