Brookfield YR-1 Rheometer - Manual (Page 59)

Brookfield Engineering Labs., Inc. Page 59 Manual No. M02-215-B0412
If the digital display does not return to ZERO, the unit is in need of service (see Appendix I,
“How to Return Your Rheometer”).
❏ Inaccurate Readings:
✓ Verify spindle, speed and model selection.
✓
Verify that %-Torque readings are greater than or equal to 10%.
✓
Verify test parameters: Yield Test Parameters, container, volume and method.
✓
Perform a calibration check; follow the instructions in Appendix B, “Calibration Pro-
cedures”.
✓ Verify that tolerances are calculated correctly.
If the unit is found to be out of tolerance, the unit may be in need of service. See Appendix I
for details on “How to Return Your Rheometer”.
❏
Rheometer Will Not Return to Zero:
✓
Rheometer is not level.
• Check with the spindle out of the sample.
• Adjust the laboratory stand.
✓
Pivot point or jewel bearing faulty:
• Perform a calibration check. See Appendix C, “Calibration Procedures”.
• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for
repair
❏
Display Reading Will Not Stabilize:
✓
Rheometer is not level
• Check with the spindle out of the sample.
• Adjust the laboratory stand.
✓
Special characteristic of sample fluid. There is no problem with the rheometer.
✓
Check for erratic spindle rotation.
• Verify the 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:
✓
Verify the rheometer is not reading ZERO.
✓
Verify the recorder is ON and not on STANDBY.
✓
Verify the range settings.
✓
Check cable leads for clean connection.