Brookfield DV-II+ Programmable Viscometer - Manual (Page 68)

Brookfield Engineering Labs., Inc. Page 68 Manual No. M/97-164-F1102
Appendix J - Fault Diagnosis and Troubleshooting
Listed are some of the more common problems that you may encounter while using your Viscom-
eter.
❏ 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 Appendex K).
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 rotat-
ing in air.
✓ Check to see if the viscometer coupling appears bent; if so, the unit is in need of service (see
Appendix K, “How to Return Your Viscometer”).
If you continue to experience problems with your viscometer, follow this troubleshooting section to
help isolate potential problems.
❏ Perform an Oscillation Check
✓ Remove the spindle and turn the motor OFF; select display to % torque mode.
✓ Gently push up on the viscometer coupling.
✓ Turn the coupling until the digital display reads 10-15 on the % display.
✓ Gently let go of the coupling.
✓ Watch the digital display; you should see a “run” of numbers next to the %; the “run” of
numbers should ultimately stop at 0.0 (+/- 0.1).
If the digital display does not return to ZERO, the unit is in need of service (see Appendix K, “How
to Return Your Viscometer”).