Chapter 5: Using Your Freeze Dryer
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42
Original instructions
operated outside the normal voltage limits (see
Appendix C)
. If necessary, the high
and low LINE VOLTAGE OFFSETS may be adjusted from the Settings /
Maintenance screen.
Collector Temp
After the collector temperature has cooled to below -40°C, an alert will be
activated if the collector temperature rises above –40°C for more than 5 minutes.
Collector Moisture
If there is liquid in the collector chamber and either the COLLECTOR or
VACUUM start button is pressed, neither function will start and an alert will be
activated. This feature prevents the inadvertent start of the vacuum pump when
liquid is in the collector and thereby can extend the life of the vacuum pump.
A few drops of liquid may remain in the drain hose after draining. When the
vacuum pump is started these drops may be sucked into the collector chamber.
This is normal.
Service Vacuum Pump
The vacuum pump normally plugs into the vacuum pump electrical receptacle on
the back of the Freeze Dryer. When the Freeze Dryer has accumulated a total of
1000 operating hours, an alert will be activated. It may be necessary to service the
vacuum pump more frequently than every 1000 hours depending on the operation
of the Freeze Dryer.
The pump oil should be regularly monitored to verify that
it is clean.
The “Set hours between oil change” can be reprogrammed from the
Settings / Maintenance screen for any value from 0 to 9999 hours.
Vacuum Leak
If the vacuum level in the freeze dryer has not reached at least 5 mbar within 30
minutes of starting the vacuum, an alert will be activated and the vacuum pump
will be turned off (if it is plugged into the Freeze Dryer vacuum pump outlet).
Vacuum Set Point
If the system is unable to achieve the vacuum set point (during Manual or Program
mode), an alert will be activated. This alert will be activated if the vacuum level is
not within 0.500 mbar of the vacuum set point in 20 minutes.
Status Email Messages
If this option has been turned on, the selected email addresses will receive
STATUS alert messages containing the current operating parameters of the Freeze
Dryer. Status alert messages will not be displayed on the touch screen. The
Freeze Dryer can be configured to send email status alert messages from the
Settings / Alerts / Select Alerts screen.
