Thermo Scientific 7452 Operating And Maintenance Manual page 90

Edit Screen
(continued)
Create a New Freezer
Thermo Scientific
Figure 10-7. Repetitions From Specified Step
Step Name with Menu Format
Loop - LOOP X TIMES STARTING AT STEP Y
End
Follow the procedure below to create a new freezing profile.
Profile
1. Select the desired first step type from the Step pull down menu. WAIT
or WAIT FOR TEMPERATURE is the mandatory first step. It is
required to purge the warm LN2 plumbing prior to initiating
controlled rate freezing. This step cannot be deleted or changed to a
different step type.
2. Select subsequent steps. Use Insert to add a step. The new step is
added on the line that is highlighted. Use Replace to modify an
existing step's parameters or change to a different step type.
3. END is the mandatory last step. It alerts the freezer that the profile
steps are completed. This step is automatically added during the profile
creation. It cannot be deleted or replaced.
PC Interface Software
Step Parameters with Definitions
where X is number of repetitions
and Y is the step number to begin
Automatic advance to a subsequent
step or return to a previous step in a
freezing profile for a programmable
number of repetitions. The Loop
function can be programmed over a
range of Step 1 to Step 20, and over
a range of repetitions from 1 to 99.
Last step in profile
Maintains the last Chamber
temperature from the previous step
indefinitely until the user terminates
the Run with the Stop button or
from the freezer keypad.
7007452 CryoMed Freezer
Section 10
10-7