PN B07493AD
1-4
Description
Controls and Indicators
Control Panel
The control panel (see
Figure 1.2
) is mounted at an angle on the centrifuge front for easy visibility
and access. It is used to enter run parameters via function keys and a keypad, and to display run
parameters, program information, and user messages.
Figure 1.2
Control Panel
Digital Displays
The displays provide run information, user messages, and diagnostics.
•
During a run, they show the actual (real-time) operating conditions.
•
When the run parameters are being entered, they show the set values selected. Set values can
be recalled during operation by pressing
SHOW SET
. After 5 seconds, the displays return to
actual conditions.
•
Error messages (see Section 4) also appear on the displays, when applicable. The centrifuge
emits a series of audible tones to alert the user to an error condition. (Instructions for disabling
the tones are in
CHAPTER 2
.)
SPEED
Indicates rotor speed in revolutions per minute (RPM) or in relative centrifugal field, a
term describing the ratio of the centrifugal acceleration at a specified radius and
speed to the standard acceleration of gravity (RCF
g
).
TIME
•
In a timed run, indicates the remaining run time in hours and minutes. The time
display begins counting down when
ENTER/SAVE
then
START
is pressed and
continues counting down to 0. The run automatically ends when the set time
reaches 0 and deceleration begins (a tone sounds when the rotor stops spinning).
If a malfunction shuts down the centrifuge during a run, when the instrument
is turned back on the time will not remain and 00:00 will be displayed in the time
window. By comparing this time with the original set time, you can determine
when the run ended.
•
In a hold run, indicates the time elapsed since
START
was pressed. After 99 hours
and 59 minutes the timer resets to 0 and continues counting elapsed time.
•
In a pulse (momentary) run, indicates the time (in minutes and seconds) elapsed
since
PULSE
was pressed. Time continues to count up until the
PULSE
key is
released. The total elapsed time is then displayed until another key is pressed.
TEMPERATURE
Indicates rotor temperature in degrees C at thermoequilibrium.
PULSE
ENTER/
SAVE
