Variable Deceleration Slope Function (Cr22N Only) - Hitachi CR22N Instruction Manual

2-2-4 Variable Deceleration Slope Function

2-2-4 Variable Deceleration Slope Function (CR22N only)

The variable deceleration slope function is designed for this centrifuge. Two slower deceleration
slopes are selectable in addition to the same slope as the well-reputed slope of the conventional
centrifuges. This function is effective for separation of samples that are apt to be disturbed. The
deceleration mode is selectable from three SLOPEs, normal deceleration slope (NORMAL), slow
deceleration slope (SLOW) and free coasting slope (FREE), and it is changeable from NORMAL to
SLOW or FREE when the rotating speed is 10,000 rpm or lower as shown in the following example.
The rotating speed is changeable to a desired speed between 1,000 rpm and 10,000 rpm in
increments of 1,000 rpm. If the desired speed is higher than the set speed, it decelerates from the
set speed to SLOW or FREE.
Example) Following is an example of operation using the variable deceleration slope function with the
R22A3 rotor.
① Selection of the variable deceleration slope function
Deceleration slope (SLOPE): SLOW
Deceleration mode change speed (MODE CHANGE SPEED): 7,000 rpm
② Other setting
Rotor: R22A3
Speed: 22,000 rpm
Time: 2 minutes and 30 seconds
Temperature: 4℃
Acceleration mode: 9
22,000
7,000
Fig. 2-2-4 (1) Example of Operation Using the Variable Deceleration Slope Function
NOTE The sample temperature might become lower than the set temperature if the code No. 0 of
DECEL is chosen or the DECEL SLOPE is chosen. Although the set temperature is 4 ℃,
the sample may be frozen if the amount of the sample is small when the low capacity rotor
is run at high speed.
Deceleration mode change speed
Normal deceleration (NORMAL)
Slow deceleration (SLOW)
Free coasting (FREE)
2-13
Time