Brookfield DV-III Ultra Rheometer - Manual (Page 129)

Brookfield Engineering Laboratories, Inc. Page 129 Manual No. M/98-211-B0104
Brookfield Engineering Laboratories, Inc. Page 129 Manual No. M98-211-E0912
❑ Viscometer Will Not Return To Zero
✓ Rheometer is not level
• Adjust the laboratory stand
✓
Pivot point or jewel bearing faulty
• Perform an Oscillation Check*
✓
Manually lift the spindle nut and rotate counter clockwise until the display shows
20% - 30% deflection.
✓
Release the spindle nut.
✓
The % display should return to 0.0% ± 0.1%.
• Perform calibration check
• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair.
* This procedure does not apply to instruments with ball bearing suspension (See Section I.7).
❑ Display Reading Will Not Stabilize
✓ Special characteristic of sample fluid. There is no problem with the rheometer.
• Refer to Appendix C
✓ Check for erratic spindle rotation
• Verify power supply
• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair.
✓
Bent spindle or spindle coupling.
• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair.
✓
Temperature fluctuation in sample fluid
• Use temperature bath control.
❑ No Recorder Response
✓ Be sure the rheometer is not at ZERO reading.
✓ Be sure the recorder is ON and not on STANDBY.
✓ Verify the range settings.
✓ Check cable leads for clean connection.
❑ Recorder Pen Moves In Wrong Direction
✓ Output polarity reversed
• Reverse leads