Brookfield DV-III Ultra Rheometer - Manual (Page 25)

Brookfield Engineering Laboratories, Inc. Page 25 Manual No. M98-211-E0912
II.6 Preventative Maintenance
The DV-III Ultra does not require any internal maintenance or adjustment. Periodic verification
of calibration is an important procedure. We recommend that you check the calibration of
your DV-III Ultra on a regular basis. The frequency of calibration checks should be set based
on your use of the instrument and the significance of the data. We generally recommend
a frequency of 1 month. See Appendix E - Calibration Check Procedure for information on
performing a calibration check.
Any condition that results in an out of calibration result (see Interpretation of Calibration
Results at the end of Appendix E) must be corrected by Brookfield or our authorized dealers.
Please check our web site for information on our dealers and a Laboratory Return Form;
www.brookfieldengineering.com.
Preventative maintenance for the DV-III Ultra consists primarily of good practice when
using the instrument. Please follow the suggestions below.
• Long term storage: When the DV-III Ultra will be out of service for an extended period
of time, use the Instrument Carrying Case in which it was supplied. Be sure to install
the shipping cap.
• When the unit is not in use, place it on the back of the laboratory bench out of the
way of normal activity.
• Be sure that the unit is properly leveled for all measurements (Section I.10; Step 6).
• Periodically check the Tension Screw on the Clamp Assembly of the Upright Rod
Assembly (Appendix G). This screw should be tight enough to prevent the unit from
moving down the rod spontaneously but not so tight as to prevent the operator
from moving the unit with the adjustment knob.
• Keep hands free from test materials to prevent transfer of material to surfaces of
the unit.
• Keep the bottom of the unit housing clean from test samples and debris. The pivot
cup and spindle connection should be clean and free of any material. This will ensure
proper connection of the spindle to the unit and proper rotation of the spindle
(minimize run out).
• Properly clean spindles and sample chambers (optional) after each measurement.
Remove the spindle from the unit prior to cleaning, not doing so may result in the
spindle being bent. Use cleaning solvents that are compatible with 300 series
stainless steel. Do not use abrasive cloths.
• Clean keypad and display screen with a soft dry cloth. Do not use harsh solvents or
abrasive materials.
• Clean instrument surfaces with a soft dry cloth. Solvents may remove factory
paint.
• Wells/Brookfield cone spindles should be handled carefully to prevent scratches to
the measurement surface and nicks on the outer radius. Do not drop the spindle
on the lab bench or floor. We recommend placing a rubber mat in the areas around
the DV-III Ultra when these spindles are in use.