Brookfield DV2+Pro Viscometer - Manual (Page 94)

Brookfield Engineering Labs., Inc. Page 94 Manual No. M03-165-F0612
Appendix K -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.
❏ Zero RPM is the Only Available Speed
✓ Check speed set selection (section IV.2.3). If custom speed is selected, make sure that additional
speeds, other than zero, have an Asterisk (*).
❏ 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 M). 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 N, “Warranty Repair and Service”).
❏ Inaccurate Readings
✓
Verify spindle, speed and model selection.
✓ Verify spindle selection is correct on DV-II+Pro.
✓
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
• “DV-II+Pro Viscometer 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 N
for details on “Warranty Repair and Service”.