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Section 2
Operation
Control Panel Operation
2-2
Orbital Shaker
The control panel on these units has a liquid crystal display and eight
operating buttons which are identified by word and symbol. During
programming, the up and down arrows increase and decrease the
numerical values of time, platform speed, or temperature. Press and hold
either arrow to cause the values to scroll in that direction; hold for more
than five seconds to increase the scrolling speed.
When changing the system configuration, the down arrow advances the
display to the next screen while the up arrow returns the display to the
previous screen. Pressing the Time, RPM or Temperature button selects
the parameter above it to be changed, while the up and down arrows
increase and decrease the numerical values, respectively, or toggle between
two different options. Pressing and holding either arrow will cause the
values to scroll in that direction; holding for more than five seconds will
increase the scrolling speed.
The START button begins platform operation as defined by the Time and
Speed setpoints, while the STOP button halts the platform. Chamber
temperature control begins upon power-up as defined by the Temp
setpoint.
The alarm indicator and alarm silence button complete the shaker control
panel. When in alarm, the unit sounds an audible warning and flashes the
three red indicators. Depending upon the error detected, pressing the
Silence button turns off the audible alarm. However, the three red
indicators continue to flash until the alarm condition is corrected. For
most alarms, the audible warning will sound again in about fifteen minutes
if the condition persists.
The alarm features are discussed in more detail in the "Shaker Alarms"
section of this manual.
Alarm indicator
Actual
Setpoints
Silence
Alarm silence
Figure 2-2. Control Panel
Liquid crystal display (LCD)
00:00H
25
35.0
25
35.0
Hold
o
Time
Speed
Temp C
Information entry buttons
Up arrow
START
STOP
Down arrow
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