27
Appendix B
CONE CALIBRATION
A special feature of the
CAP Series
Viscometers allows the user to perform a cone
calibration using Viscosity Standard Fluids. This field calibration will accommodate
any wear on the tip of the cone which may result from contact with the plate.
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 Appendix A (Table A1) and choose the calibration fluid for the spindle being
calibrated.
1. Turn on the Viscometer.
2. Attach solvent trap to coupling shaft.
3. Attach spindle.
4. Place appropriate amount of sample (Refer to Appendix A (Table A1)) 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) prompted by
the screen.
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.
11. Press the
RUN
key to start the calibration.
NOTE:
The calibration process may be cancelled at any time prior to pressing
RUN
to calibrate, by pressing the
ESCAPE
key.
When calibration is complete, spindle rotation will stop and the “
CALIBRATION
COMPLETE
” screen is displayed. Press
ENTER
to continue.
Summary of Contents for CAP 1000+
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