Brookfield DV2T Extra Viscometer - Manual (Page 89)

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.