Beckman Coulter Microfuge 20 Series, Instructions For Use Manual

Page: 39 / 74

B30162AA 2-9
Operation
Run Procedure
2
2
Press the
START/STOP
key.
Once the rotor reaches 1/3 of the maximum rotor speed (5000 RPM) and the precool
temperature value is reached and remains stable for one minute, the program ends with the
indication
Precool OK
.
NOTE
If the precooling program is selected and then deselected without actually being started, the set
temperature will be reset to the old value. If, however, the precooling run is started, the limited set
temperature will also be used for the following runs, but it will not be saved in the program.
Setting Acceleration and Deceleration Rates
Microfuge 20 series centrifuges feature two acceleration rates — fast and soft (or slow), and two
deceleration rates — fast and soft (or slow). See below for actual times of fast and soft acceleration
and deceleration by rotor.
To activate both Soft-start and Soft-stop functions
1
Press the
MENU
key until the
Soft-stop/start
function flashes on the display.
Program mode ends if no other keys are pressed within 15 seconds.
2
Press the or cursor key until the
Soft-stop/start on
is displayed.
Both soft-start and soft-stop functions are now activated.
3
Press the
MENU
key to confirm the selection.
Table 2.1 Acceleration and Deceleration Rates by Rotor (in minutes:seconds)
a
a. Times are approximate; actual times vary depending on the the rotor load, run speed, and
voltage fluctuations.
Rotor
Microfuge 20 Microfuge 20R
Acceleration Deceleration Acceleration Deceleration
Fast Soft Fast Soft Fast Soft Fast Soft
FA241.5 0.26 1:03 0:22 1:05 0:26 1:02 0:22 1:05
FA241.5P 0:16 1:03 0:16 1:05 0:16 1:02 0:16 1:05
FA4x8.2P 0:11 1:03 0:13 1:05 0:11 1:02 0:13 1:05
FA361.5 0:26 1:03 0:22 1:05 0:26 1:02 0:22 1:05