Brookfield DV2T Viscometer User Manual

Page 89

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Brookfield Engineering Labs., Inc.

Page 89

Manual No. M13-167-B0614

Appendix L - Fault Diagnosis and Troubleshooting

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

Viscometer.

Spindle Does Not Rotate

Make sure the viscometer is plugged in.

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

Make sure the motor is ON and the desired rpm is selected.

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 if bent.

Inspect viscometer coupling and spindle coupling mating areas and threads for dirt;

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

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

O). Check to see if spindles rotate eccentrically or wobble. There is an allowable runout

of 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 appears bent; if so, the unit is in need of service

(see Appendix O: Warranty Repair and Service).

Inaccurate Readings

Verify spindle, speed and model selection.

Verify spindle selection is correct on DV2T.

If % readings are under-range (less than 10%), the display will flash; change spindle

and/or speed.

EEEE

” on the digital display means the unit is over-range (greater than 100%); reduce

speed and/or change spindle.

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

• “More Solutions to Sticky Problems”, Section III

• “DV2T Viscometer Operating Instructions”, Appendix C: Variables in Viscosity

Measurements

Perform a calibration check; follow the instructions in Appendix F.

Verify tolerances are calculated correctly.

Verify the 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 O for details on Warranty Repair and Service.

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