PROBLEM:
How do I check the temperature?
SOLUTION:
Enter a temperature value in the edit mode, preferable one that
matches your thermometer.
Make sure the orifice and piston rod are in the
barrel.
Allow the instrument to lock into temperature and equilibrate for 15
minutes. Remove the thermometer chimney set screw located on the top of the
barrel. Insert thermometer and let stabilize for 10 min.. If display does not agree
with thermometer perform temperature calibration.
PROBLEM:
My digital Encoder is not responding! What’s going on?
SOLUTION:
Make sure the encoder is enabled in the SETUP mode. Verify all
cables are plugged in at base of Encoder housing and inside the Indexer.
PROBLEM:
My method B numbers are wrong, even after inputting my
manufacturer’s values for apparent melt density! Why?
SOLUTION:
The value reported by the manufacturer is probably a solid state
density, not the melt density. Run an A/B method experiment to acquire the
proper melt density.
PROBLEM:
My MFI is changing!
SOLUTION:
Your MFI may vary as much as 2% due to operator
inconsistencies, even the smallest things may affect MFI. The most common
cause is not keeping the barrel and orifice properly cleaned. We recommend the
power cleaning kit (PN 8052-97K) to help guarantee and promote a clean
system. Also, make sure sample weight is consistent throughout tests.
PROBLEM:
What flag do I use?
SOLUTION:
Please refer to the section "Choosing a Timing Flag" in the
manual.
PROBLEM:
How long should my cut time be for a Method A run?
SOLUTION:
Dynisco Polymer Test suggests that you collect about 1 gram of
sample extrudate, or more, before making your 2nd cut.
PROBLEM:
My printer does not work! What gives?
SOLUTION:
Enable the printer in the SETUP mode. Make sure it's an on-
line
PROBLEM:
My materials Melt Flow Rate is much higher than normal?
SOLUTION:
If the material is moisture sensitive, dry it. Moisture can make
Flow Rates increase greatly, especially on Polyesters (PET, PBT), Nylons,
Polysulfones and material with filler content (glass, calcium carbonate, and
talc).
Typical Questions
QUESTION:
How often should I test my material?
ANSWER:
This depends on how much material your plant receives and the
method that it is received, a suggested guideline follows:
- Material supplied by tankers (3 tests)
- Material supplied in bags on pallets (3 tests per pallet, check lot numbers)
- Material supplied in individual bags (3 tests per bag)
Also conduct a test if there is a production problem
QUESTION:
My material has a Certificate of Conformity and my results don’t
agree.
Series 4000 Melt Indexer Operation Manual
Questions and Answers
70
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