LCR7000 & RHEOSIGHTS P/N: 974194 |
Rev: A
|
ECO: 52468
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From lab to production,
providing a window into the process
-93-
If the Load Cell is run to the bottom of the rheometer barrel before the test is finished the
drive motor will over force itself and throw up an error. You will not see the error on your
PC but the Load Cell will only be allowed to move Up and not Down.
You should first try to toggle the power switch Off and then back On to reset the drive
system. Be sure the Load Cell and / or Pressure Transducers are connected to the
rheometer before resetting the machine. If this does not work, you may have to adjust the
Torque of the drive motor inside the base of the rheometer.
Before a rheometer leaves the factory, it is checked with a control material using standard
SQC/SPC techniques. When our data indicates a rheometer is not performing according to
previous standards, we have always found the answer to be one of the items in the
checklist below.
•
Force calibration OK?
•
Temperature calibration OK?
•
The program conditions are exactly the same as before?
•
The Force is zeroed correctly?
•
Are you using the same die as before? Dimensions OK?
•
Is the Piston Tip Dimension OK? (09.525 > Tip OK > 9.515 mm)
•
Is the die very clean? (If high temp material was run previously, heat the die up to
the previous sample temperature and re-clean.
•
Is the guide bushing free to move up and down the Plunger rod?
•
Was the material dried as before? (If necessary)
•
Is the material exactly the same as before?
•
Verify correction scheme used is as before (i.e. Rabinowitsch on or off etc.)
•
Is the piston rod bent?
•
Put rheometer temporarily on a filtered cleaner powder supply.
•
Is the PRT well clean? Poor contact between PRT and barrel can cause poor
temperature control.
•
Is bottom limit switch set correctly? (3 mm of plunger movement when at bottom
limit switch?)
2.
When Your Control Material Goes Out of Control
