Brookfield Engineering Labs., Inc.
Page 61
Manual No. M13-167-A0415
An Oscillation Check is performed as follows:
• Remove the spindle and level the DV3T Rheometer
• Gently push up on the rheometer coupling.
• Turn the coupling until the % Torque reading is 10 – 15 %.
• Gently let go of the coupling.
• Watch the reading. The % Torque reading should decrease smoothly
and oscillate about 0.0%.
Selecting Oscillation Check in the Device Setup menu will present the user
first with a screen instructing to level the rheometer and remove the spindle.
Confirmation of level and spindle removal will present the user with the
Oscillation Check screen as shown below.
Figure V-5
A successful Oscillation Check will show a very smooth decrease of %Torque
with a final value /-0.2 of 0.0. Any value above 0.2 % or below -0.2%
indicates that a calibration check should be performed (see Appendix F).
TIP: Higher Torque ranges (HA and HB) will quickly return to the zero
value without displaying much oscillation. This is normal behavior.
The Oscillation Check is not a guarantee of proper calibration. It is only an
indication of the performance of the lower bearing of the rheometer. Calibration
can only be verified through the use of a calibration standard such as Brookfield
Silicone and Mineral Oil standards.
Technical Support Info:
The information contained in the Technical Support Info menu is designed
to support Brookfield for problem resolution. When contacting Brookfield
for support, you may be asked to provide information contained in one of
the menu choices within Technical Support Info. There are no settings
within this section and the performance of the DV3T Rheometer can
not be affected by accessing this section.
About:
The About screen is shown during the start up sequence of the DV3T Rheometer. Selecting
About in the Device Setup menu will show the same information (see Figure V-6). Information
