Brookfield YR-1 Rheometer - Manual (Page 58)

Brookfield Engineering Labs., Inc. Page 58 Manual No. M02-215-B0412
APPENDIX I - Fault Diagnosis and Troubleshooting
Listed below are some of the more common problems that you may encounter while using your
YR-1 Rheometer:
❏
Spindle Does Not Rotate:
✓
Make sure the rheometer is plugged in.
✓
Check the voltage rating on your rheometer (115, 220V); it must match the AC supply
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 the spindle vanes; replace the spindle if it is bent or
warped.
✓
Inspect the rheometer coupling and spindle coupling mating areas and threads for dirt;
clean threads on the spindle coupling with a 3/56 left-hand tap.
✓ Inspect the threads for wear; if the threads are worn, the unit needs service (see Appen-
dix 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 ser-
vice.
If you continue to experience problems with your rheometer, follow this troubleshooting section
to help isolate potential problems.
❏
Perform an Oscillation Check
✓
Press and hold the and‚ arrow keys simultaneously while turning the rheometer power
ON. When prompted with CAL VERIFICATION on the display, use the arrow keys
to select YES, then press the Enter key. Ensure no spindle is attached before Auto-
zeroing.
✓
With the rheometer set to zero (0) rpm, gently push up on the rheometer coupling.
✓
Turn the coupling until the display % torque reads 10-15.
✓
Gently let go of the coupling.
✓
Watch the display; you should see the torque value return to 0.0 (+/- 0.1).