From lab to production,
providing a window into the process
APPENDIX A
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DIGITAL ENCODER OPTION
The Digital Encoder Option, if purchased,
Introduction
A digital encoder module is available from DYNISCO POLYMER TEST. It permits the collection of multiple data
points from one charge of the barrel. The digital encoder makes operation of the instrument much faster
and easier.
Encoder Option
Tests using from one digital flag up to fifteen digital flags can be performed. The Dynisco Polymer Test Encoder for
Method B tests employs an encoder coupled to a precisely calibrated arm. The tip of this arm employs a hardened
& ground tip for extra-long life. Accuracy over the ASTM measurement range of 6.35mm and 25.4mm is +/-0.4%.
The optical encoder, while being very accurate, also enables the test length signal to be processed & varied digitally.
Thus, any test length up to 1” (ASTM) or 30 mm (ISO) may be selected. Up to 15 MFR results per barrel filling can
be obtained.
The unit is securely fastened to the rear of the Melt Indexer, and the arm latches down to facilitate cleaning of the
unit after the test is completed.
Encoder Advantages
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Completely Automatic Test Length Selection on Single MFR Tests.
Up to 15 MFR readings per Barrel Filling can be obtained.
Any test flag length up to 30 mm can be used.
User Defined test length and test spacing for single or multiple tests can be used.
Automatic Test Length and Test Spacing, for multiple tests, are used.
Ten test conditions are stored internally.
Why use it?
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No manual cuts are required.
A sample can be checked as homogeneous within a charge.
Get better precision (averages are less variable than a single observations) for tests.
Verification as to whether barrel pressure drop is significant for sample.
Gain ability to reject data point if bubble or air pocket existed in sample.
Installing the Digital Encoder
The following parts should be in the encoder upgrade kit or included with the encoder based melt indexer:
(if ordered)
1.
It is required that the system be turned off and removed from power. It is recommended that the system be
cooled down to room temperature. If not cooled down, be cautious of high temperatures around the top of the
barrel surface.
Remove the LMI’s lo
wer pole cover.
Remove the LMI’s upper barrel cover.
Pivot out LMI’s platform cover.
Mount the Digital Encoder and bracket with the MICA insulator,
underneath the bracket, on to base’s top plate.
Use the provided mounting screws.
Feed the encoder cable
through the base’s top plate.
2.
3.
4.
5.
6.
P/N:974179
Rev: 0918 ECO: 49667
www.dynisco.com
