Thermo Scientific 7450, Operating And Maintenance Manual

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10-26 7007452 CryoMed Freezer Thermo Scientific
Section 10
PC Interface Software
Each of the four screens described above must be saved individually. The
application will prompt to Save if unsaved changes are present when the
Exit button is clicked.
When using the same PC for several freezers, potential problems could
occur during printing. There could be a loss of Run data points. Chart
data is updated every 6 seconds. Run data is captured every 6 seconds with
updates to hard disk every minute. Serial port communication may stop
for a short time during printing. The loss of a small number of data points
during slow ramps or holds will not cause a problem (chart lines are
interpolated across the gaps). Loss of data during fast ramps may be more
critical. Experiment with test runs before trying to print during a critical
part of a critical freeze. If in doubt, don't print during a critical run.
If, because of printing, the freezer loses communication for more than 20
seconds, the freezer will go in ‘Stand Alone’ mode. A very slow PC
(<166MHz) with limited resources (<32MB RAM) may stop serial
communication for more than 20 sec during printing. In ‘Stand Alone’
mode, PC control is disabled and there may be loss of run data for the
duration of the serial communication interruption. Experiment with test
runs, or if in doubt, don't print during a critical run.
Using other applications on the same PC with a Run in progress may cause
the loss of Run data points. Serial port communication may stop for a
short time if PC resources are consumed by other applications. Chart lines
continue across the communication gaps. Slow ramps or holds will lose
very little data. However, steep ramps may be more critical. Experiment
with test runs, or if in doubt, don't run other applications during a critical
profile run.
If there is a loss of communication between the PC and the freezer for
more than 20 seconds, the freezer may go into ‘Stand- Alone’ mode. A
slow PC (<166MHz) with limited resources (<32MB RAM) may stop
serial communication for more than 20 sec if multi-tasking. PC control
would be disabled for the duration of the current Run. Run data is lost
during the time of the communication interruption. Experiment with test
runs, or if in doubt, don't run other applications during a critical profile
run.
A Windows crash may stop serial communication for more than 20
seconds. The freezer will go into ‘Stand Alone’ mode and PC control will
be disabled for the duration of the current Run. Run data will be lost
during the time of the communication interruption. Experiment with test
runs, or if in doubt, don't run other applications during a critical profile
run.
Saving Changes
Sharing Host PC
Resources