Advantech VariSifter VS1000, Руководство по эксплуатации/настройке

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VariSifter™
Frequently Asked Questions
For specific sieving procedures, please refer to Test Sieving: Principles and Procedures located in the User’s
Manual.
1. Can I use one sieve and fill the rest of the stack with spacers?
Yes, a single sieve can be used at a time. Be sure to add spacers at the top of the stack and place the
sieve at the bottom. Please note when using precision mesh sieves, only one sieve may be used at a
time while performing separations of 30 microns and finer.
2. When would I need to activate the Horizontal Tappers?
While sifting media 45 microns and finer, it may be beneficial to incorporate the Horizontal Tappers.
These tappers fire opposite the Vertical Tapper and may aid in elimination of particle agglomeration.
3. How do I determine the best amplitude setting for my test?
Always start the test at zero amplitude. Slowly increase the amplitude until the heaviest particles are
rolling on the sieve surface. Media particles should arc no higher than half the height of a standard
sieve therefore never touching the sieve above it. When using precision mesh sieves, media particles
should arc a maximum of ¼” above the wire mesh surface. Final test results may be adversely
affected by not complying with this rule.
4. How long should I run my test?
Generally, there are industry or “in-house” standards for sieving durations. For instructions on
determining the optimum test time, please refer to the Recommended Time Intervals section in
Chapter 6: Performing the Sieve Analysis in the
Test Sieving: Principles and Procedures manual.
Generally, the VariSifter test is complete when media is no longer filtering into the next sieve below.
It is recommended to perform three tests for repeatability, noting the frequency, amplitude and test
time for the running of future tests.
5. The media samples are not staying within the stack assembly. What is happening?
There are a few possible reasons for the sample escaping the stack assembly:
1. The stack may have been improperly assembled and inserted.
2. There may be holes or tears in the fines collector or diaphragm or cracks in the sieve frames.
3. The amplitude may be improperly set.
Start by examining the sieve stack assembly. Be sure the following steps have been executed:
 Hook Fines Collector to bottom of
Fines Collector Holder.
 Assemble your sieve stack with up to
six standard sieves or up to three
precision mesh sieves. If fewer sieves
are used, replace with Spacers.
 Add the Top Cone.
 Add the sample.
 Add the Diaphragm.
 Add the Column Lock and snap the
arms down under the rim of the Fines
Collector Holder.
 Insert the stack assembly into the test
chamber until it hits the stop at the