General Maintenance
irTis BenchTop 2K, 4K and 6
34 Rev 007, 10/11
© SP Scientific 2011
Clearing the Vacuum Pump Maintenance Alarm
The Vacuum Pump Maintenance Alarm will sound after the number of vacuum pump
running hours has exceeded the Vacuum Pump Maintenance setpoint. Before the
alarm can be cleared, the condition must be corrected, i.e., the vacuum pump oil
changed. To clear the alarm once the oil has been changed:
1. Press Menu to access the Main Menu screen.
2. Scroll to the User Options line and press Menu to access the User Options
menu screen.
3. Scroll to the Vacuum Pump Maintenance line and press Menu to access the
Vacuum Pump Maintenance screen.
4. Scroll to the Current Hours entry.
5. Press and Hold the Menu button until the Current Hours reset to 0000
00mins.
6. Scroll to the menu back indicator. Press Menu twice to return to the Main
Menu Screen.
7. Scroll down to Alarm and press Menu to access the Alarm Screen.
8. Scroll to the Vacuum Pump Maintenance alarm and press Menu to clear it.
Scheduling Oil Changes
After clean oil is loaded into the vacuum pump and all necessary connections have
been made between the vacuum pump and the freeze dryer, perform a full capacity
test cycle.
Have a qualified technician check the oil after the test cycle. If the oil appears dirty,
change the oil after every use. If the used oil appears clean, change the oil after the
next two uses or cycles. If the oil remains clean after two cycles, change the oil after
the next four cycles. Continue to monitor the vacuum pump oil after each cycle until a
change of condition is noted or a period of one month has elapsed. If the oil remains
clean after several cycles, changing the oil once per month may be sufficient.
Vacuum Tubing and Gaskets
Inspect tubing and gaskets periodically for signs of wear. Check gaskets by removing
and inspecting interior surfaces for potential problems. A light coating of vacuum
grease on the exterior surfaces will protect gaskets and tubing. Reapply grease as
needed.
Condenser Gasket
The condenser gasket should be removed routinely and inspected for cracks.
To check the condenser gasket:
1. Remove the condenser gasket.
2. Take the gasket in both hands and turn it inside out.
3. Inspect the inside of the gasket. This is where you are most likely to find a
potential problem.
4. If you find the slightest inconsistency in the surface of the material (e.g., cuts,
cracks, dry rot, rippling), replace the gasket as soon as possible.
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