Chapter 4: Using Your Freeze Dryer
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• To change the rate press and hold SELECT until the desired time
interval is shown. The time between data transmissions may be set to
occur at 10, 30, 60, 300 or 600 second intervals.
• Press SELECT to return to display operating parameters or after a
short delay, the display will automatically switch to show operating
parameters.
Automatic Start-Up
To run the Auto Mode, press the panel switch labeled REFRIGERATION
AUTO. The green LED above the switch illuminates and the refrigeration
system starts. When the collector reaches –40°C, the vacuum pump will
start. The Temperature and Vacuum Graph indicate collector temperature
and system vacuum. The LCD display shows the actual temperature of the
collector. When the vacuum in the system is above 5 mBar the vacuum
display indicates “HI.” At 5 mBar and below, the display shows the actual
vacuum.
When the system vacuum is between 0.450 and 0.133 mBar, the lower green
vacuum graph LED will flash. When the system vacuum level is <0.133
mBar, the green LED will be lit steadily indicating that most samples may be
added.
Manual Start-Up
To manually run the freeze dry process press the REFRIGERATION MAN
switch. This starts the refrigeration system. The green LED above the switch
illuminates. When the collector temperature reaches –40°C, the vacuum
pump may be started by pressing the VACUUM switch. The Temperature
and Vacuum Graph indicate collector temperature and system vacuum. The
LCD display shows the actual temperature of the collector. When the
vacuum in the system is above 5 mBar the vacuum display indicates “HI.”
At 5 mBar and below, the display will show the actual vacuum.
When the system vacuum is between 0.450 and 0.133 mBar, the lower green
vacuum graph LED will flash. When the system vacuum level is <0.133
mBar, the green LED will be lit steadily indicating that samples may be
added.
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