Timer Setup & Operation - Gilson SS-20 Operating Manual

Determine what size test sieves will be used, and adjust the
Rotary Sifter to the proper settings. There are two openings
approximately 2in apart in the center of the cabinet bottom
(see Figure 1). Insert the post of the sieve turntable into the
proper opening; the opening toward the front is for 12in or
300mm diameter sieves, and the one toward the back is for 8in
or 200mm diameter sieves. Set the sieve size selector knob on
the front control panel to "12" or "8". This adjusts the springs
controlling the tapping hammers for the best tapping force.
In addition to the test sieves selected for the test, the sieve
stack must include the appropriate receiving pan and a sieve
cover. Assemble the sieve stack with the pan and finest sieves
on the bottom, progressing to the coarsest sieves on top.
Deposit the prepared test specimen onto the top sieve, and
put the cover on.
Open the cabinet door all the way. Special heavy-duty hinges
allow the door to swing 170° for complete and easy accessto
the interior. Carefully place the entire sieve stack with sample
on the sieve turntable in the Rotary Sifter, resting the stack
against the rubber-covered rollers in the back of the cabinet.
Use the ergonomic knob on the side of the case to tilt the
cabinet back against the cabinet rotation stops to its operating
angle of approximately 45°. Taller operators may find it more
convenient to load the sieve stack with the cabinet already
tilted back. Close the cabinet door completely.
NOTE: Before starting a test cycle, the Rotary Sifter
cabinet must be tilted back against the rotation stops.
Failure to do this may result in incomplete separation or
loss of the test specimen.
NOTE: The Door Safety Switch prevents operation of
the Sifter and Timer until the cabinet door is completely
closed. Disabling this switch makes operation of the Sifter
dangerous and voids the warranty.
3.2 Timer Setup & Operation
This unit is equipped with an easy-to-operate Gilson interval
count-down timer. The timer has a large 0.6in LED display
and will operate in four different modes. It is powered by line
voltage and will work on power supplies from 100—265 VAC,
50/60Hz, with up to 20 amps Inductive or Resistive current.
21 Washington Ave
5
Scarborough, ME 04074
NOTE: The Rotary Sifter motor controlled by the timer is
restricted to operating on a limited electrical supply range.
Check carefully to insure compatibility with your electrical
supply.
Current timer mode is indicated by the four red LED's on the
timer face:
• A = MMSS (99min:59sec x 1 second)
• B = HHMM (99hr:59min x 1 minute)
• C = SSSS (9999sec x 1 second)
• D = MMMM (9999min x 1 minute)
(H is for hours, M for minutes, and S for seconds.) To adjust
the timer mode, press and hold both <UP> and
<DOWN> keys at the same time until the display shows the
mode. Once the mode letters are displayed, press
<UP> or <DOWN> to change modes. Press <START/ STOP>
to accept new mode.
The time required to complete a test will vary depending
upon the physical characteristics of the test material. Most
separations will be complete in ten minutes or less. It may
require experimentation to determine the optimum test time
for a particular material.
To set the run time, press either <UP> or <DOWN>. The first
digit on the right hand side will flash in half-second intervals.
Press either arrow key to adjust to the desired value. To enter
the displayed digit and move to the next, press <START/
STOP>. Once the last digit on the left is entered, the timer is
ready to start.
Insure the cabinet is rotated back to its operating angle of
45°, then Press <START/STOP> to initiate the current run
program. Once running, pressing <START/STOP> again will
pause the timer with the current amount of time remaining
on screen. When allowed to time-out, the timer beeps and
displays DONE. Press any key to reset the timer and prepare
it for the next cycle. Setting and Mode values are saved
automatically.
NOTE: Opening the cabinet door in the middle of a test
cycle shuts off all power to the timer and motor. When the
door is closed again, the timer will be reset to the
originally programmed time interval.
When the test cycle is complete, open the cabinet door and
remove the sieve stack for weight determinations.
888.293.2121
sales@myerstest.com
myerstest.com
5