Step-Mode Operation - Hitachi CR22N Instruction Manual

High-speed refrigerated centrifuges
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2-3-2 Step-Mode Operation

This centrifuge has the step-mode operation capability that allows you to save three different sets of values
for a run parameter set in a single memory location (program No. 31 - 33, 41 - 43, and 51 - 53) and then
change some or all of the run conditions (e.g., speed, run time, rotor temperature, etc.) for each step
during a step-mode run. Save step-mode run conditions at the program No. 31 - 33 (41 - 43 or 51- 53) in
accordance with "2-3-1 Programmed Operation (1)".
When the program No. 31 is recalled, the centrifuge automatically performs step-mode operation in order of
program No. 31, 32 and 33.
(1) How to activate a step-mode operation
[Typical settings]
Shown below is the example of a three-step run and how to activate a step-mode operation.
Speed
Run time
Temperature
Accel rate
Decel rate
Rotor
1st step
(Program No. 31)
1000 rpm
30 min
4℃
9
9
R20A2
20,000
5,000
Program
No.31
1,000
30min
Fig. 2-3-2 (1) A typical Step-Mode Run
2nd step
(Program No. 32)
20000 rpm
60 min
4℃
9
9
R20A2
Program
No.32
Program
No.33
60min
10min
2-30
2-3-2 Step-Mode Operation
3rd step
(Program No. 33)
5000 rpm
10 min
4℃
9
7
R20A2

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