Brookfield DVE - Appendix H - Fault Diagnosis and Troubleshooting; Spindle Does Not Rotate Troubleshooting; Spindle Wobbling or Bending Issues; Dynamic Zero Test Procedure

AMETEK Brookeld Page 46 Manual No. M15-356-B0916
Appendix H - Fault Diagnosis and Troubleshooting
Spindle Does Not Rotate
❏ Make sure the power cord is plugged in and connected to the socket on the AV-6 power supply.
❏ Make sure the metal jack of the AV-6 power supply is rmly attached to the viscometer.
❏ Make sure the power is ON and that the motor is on (veried by rpm in display).
Spindle Wobbles When Rotating or Looks Bent
❏ Make sure the spindle is tightened securely to the viscometer coupling.
❏ Check the straightness of all other spindles; replace them if bent.
❏ Inspect viscometer coupling and spindle coupling mating areas and threads for dirt: clean
threads on spindle coupling with a 3/56 le-hand tap.
❏ Inspect threads for wear; if the threads are worn, the unit needs service (see Appendix J).
❏ Check to see if spindles rotate eccentrically or wobble. ere is an allowable run-out for
1/32-inch in each direction (1/16-inch total) when measured from the bottom of the spindle
rotating in air.
❏ Check to see if the viscometer coupling is bent; if so, the unit is in need of service.
If you are continuing to experience problems with your viscometer, follow this troubleshooting
section to help isolate the potential problem.
Dynamic Zero Test
❏ Remove spindle and level the viscometer.
❏ Set speed to 10 rpm and turn the motor on.
If the viscometer % torque is greater than ±0.5%, a calibration check should be performed. See
Appendix E for details on how to perform the calibration check procedure.
Inaccurate Readings
❏ Verify Spindle, Speed and Model selection
❏ Verify test parameters: temperature, container, volume, and method. Refer to:
• “More Solutions to Sticky Problems”; Chapter 3, Section 3.4, Viscosity Measurement
Techniques
❏ Perform a calibration check. Follow the instructions in Appendix E.
• Verify tolerances are calculated correctly.
• Verify that calibration check procedures were followed exactly.
If the unit is found to be out of tolerance, the unit may be in need of service. See Appendix J for
details on how to return your viscometer.