Brookfield DV2+Pro Viscometer - Manual (Page 95)

Brookfield Engineering Labs., Inc. Page 95 Manual No. M03-165-F0612
❏ Viscometer Will Not Return to Zero
✓ Viscometer is not level
• Check with spindle out of the sample
• Adjust the laboratory stand
✓ Pivot point or jewel bearing faulty
• 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 most likely is in need of service.
• Perform calibration check (See Appendix E)
• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair (See
Appendix N).
* This procedure does not apply to instruments with ball bearing suspension. (See section I.3)
❏ Display Reading Will Not Stabilize
✓
Special characteristic of sample fluid. There is no problem with the viscometer.
• Refer to Appendix C
✓ Check for erratic spindle rotation.
• Verify power supply
• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair.
✓ Bent spindle or spindle coupling.
• Contact Brookfield Engineering Laboratories, Inc. or your Brookfield dealer for repair.
✓
Temperature fluctuation in sample fluid.
• Use temperature bath for control
❏ No Recorder Response
✓ Be Sure the viscometer is not at ZERO reading.
✓
Be sure the recorder is ON and not on STANDBY.
✓
Verify the range settings.
✓
Check cable leads for clean connection.
✓
Verify cable connections (see Appendix H).