Replacing the Column Lock
WARNING: Do not lock column lock arms until you are ready to place
the test stack into the test chamber! Uncontrolled release of the arms
could cause stack upset and sample loss. Place the column lock onto
the sieve stack and press straight down until the locking arms snap
onto the fines collector holder.
Check the Control Panel
As a safeguard, make sure the amplitude control is set at “0” before
placing the stack assembly into the test chamber. This is necessary to
prevent damage to the sieves and the test sample in the chamber. If
the amplitude had been inadvertently set to the maximum setting or
the timer interrupted mid-cycle, for example, the sudden impact of the
signal from the speaker driver could damage the sieves or compromise
your test sample.
Inserting the Stack Assembly
Slide the stack assembly into the test chamber with the column arms
locked. The stack assembly is stopped at the top by two tabs on the
driver support plate above. On the test chamber table, you will notice
two rivets that limit how far the stack can be placed inside the
chamber. The table switch on the left side of the test platform is a
safety interlock device that prevents the unit from operating if the
stack moves out of position. This switch will be properly deployed and
the circuit activated if the stack is inserted correctly.
Once the stack assembly is in position, the column lock can be
released by sliding a thumb and forefinger into the openings between
the lowest sieve or spacer and the column locking arms. Spread the
column locking arms. The spring-loaded column lock will release and
expand to lock the column into the test chamber, forming a tight seal.
Place the L3-N9 Column Stop in front of the test stack. This column
stop ensures the stack will remain in place during testing.
Close the sliding door to the test chamber.
Beginning the Test
Program the predetermined testing time and frequency per the
instructions in the Control Panel section above. Choose whether to
activate your bottom and side tappers. While virtually all test
procedures benefit from the use of the vertical tap, some may not.
Use the setting appropriate to your samples. Refer to the “Vertical
and Horizontal Tappers” section in the Control Panel section for more
information.
Setting the Amplitude
Note: The amplitude is the “lift” action on the particles as the
oscillating sonic column is set in motion. The higher the amplitude
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