Chapter 5: Using Your Freeze Dryer
Product Service 816-333-8811 or 1-800-522-7658
automatically restart. This prevents melted sample from being drawn into the
collector and prevents liquid from being drawn into the vacuum pump.
When power is restored, the POWER FAIL alert message will be displayed on the
touch screen and the audible alarm will sound.
Line Voltage Range
If the voltage supplied to the Freeze Dryer varies beyond allowable limits, the
LINE VOLTAGE RANGE alert will be activated. The high and low alarm points
are preset at the factory to correspond to the normal allowable voltage variations
based on the nominal voltage specified for the freeze dryer. Some models may be
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.
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).
System Temp Variation
Once the system temperature has stabilized (held set point temperature within +/-
2°C for 20 minutes), if the manual set point temperature or program hold
temperature varies more than ±2°C from the set point (as measured by the system
temperature sensor), the “System Temp Variation” alert will be displayed.
Vacuum Variation
Once the system vacuum has stabilized at a point where it changes less than 0.020
mbar in 5 minutes, if the vacuum changes more than 0.500 mbar, the “Vacuum
Variation” alert will be displayed.
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.
To Next Page
Loading...
Need help?
General
