Brookfield DV-E Viscometer Manuel d'utilisateur télécharger pdf (Page 34)

Brookeld Engineering Labs., Inc. Page 34 Manual No. M98-350-J0912

Appendix G - Fault Diagnosis and Troubeshooting

Listed below are some of the more common problems that you may encounter while using your

DV-E Viscometer. Review these items before you contact Brookeld.

Spindle Does Not Rotate

o Make sure the viscometer is plugged in.

o Check the voltage rating on your viscometer (115V, 220V): it must match the wall voltage.

o Make sure the power switch is in the ON position.

o Make sure the speed set knob is set properly and securely at the desired speed.

Spindle Wobbles When Rotating or Looks Bent

o Make sure the spindle is tightened securely to the viscometer coupling.

o Check the straightness of all other spindles; replace them if bent.

o Inspect viscometer coupling and spindle coupling mating areas and threads for dirt: clean

threads on spindle coupling with a 3/56 left-hand tap.

o Inspect threads for wear; if the threads are worn, the unit needs service (see Appendix I).

o Check to see if spindles rotate eccentrically or wobble. There is an allowable runout for 1/32-

inch in each direction (1/16-inch total) when measured from the bottom of the spindle rotating

in air.

o Check to see if the viscometer coupling is bent; if so, the unit is in need of service.

If the pointer sticks and/or does not rest at zero, the unit is in need of service. See Appendix I for

details on how to return your viscometer.

Inaccurate Readings

o Verify spindle, speed and model selection

o Verify test parameters: temperature, container, volume, method. Refer to:

• “More Solutions to Sticky Problems”; Section II.2a — Considerations for Making

Measurements

• Dial Viscometer Operating Manual; Appendix A — Viscosity Ranges

• Dial Viscometer Operating Manual; Appendix B — Variables in Viscosity Measurement

o Perform a calibration check. Follow the instructions in Appendix D.

• Verify tolerances are calculated correctly.

• Verify 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 I).

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Brookfield DV-E Viscometer Manuel d'utilisateur Page 34