Brookfield DV-III Ultra Rheometer Manual de usuario descargar pdf (Pagina 128)

Brookeld Engineering Laboratories, Inc. Page 128 Manual No. M98-211-E0912

APPENDIX J - Fault Diagnosis and Troubleshooting

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

❑ Spindle Does Not Rotate

✓ Make sure the rheometer is plugged in.

✓ Check the voltage rating on your rheometer (115V or 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 rheometer coupling.

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

✓ Inspect rheometer coupling and spindle coupling mating areas and threads for dirt; clean threads

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

✓ Inspect rheometer coupling threads for wear; if the threads are worn, the unit needs service (see

Appendix I). 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 rheometer coupling appears bent; if so, the unit is in need of service (see

Appendix L for details on returning your instrument for service).

If you continue to experience problems with your rheometer, follow this troubleshooting section to help

isolate potential problems.

❑ Inaccurate Reading

✓ Verify spindle, speed and model selection.

✓ If % readings are under-range (less than 10%), the units display (%, cP, D/cm

, 1/sec) will ash;

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

• DV-III Ultra Digital Rheometer Operating Instructions, Appendix C, “Variables in Viscosity

Measurements.”

✓ Perform a calibration check; follow the instructions in Appendix E.

✓ 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 L for details

on returning your instrument for service.

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Brookfield DV-III Ultra Rheometer Manual de usuario Pagina 128