Inspecting And Changing Vacuum Pump Oil; Inspecting The Oil; Changing Or Adding Oil - Micromeritics Gemini VII 2390a Operator's Manual

Preventive Maintenance

Inspecting and Changing Vacuum Pump Oil

This procedure is also shown in one of the How-To videos located on the Help menu.
The oil in the vacuum pump should be changed every three months when the efficiency of the vacuum
pump declines (requiring increased time to reach vacuum levels) or if it becomes discolored. The oil is
easily inspected to determine if a change is necessary.

Inspecting the Oil

View the vacuum pump oil through the oil-level window. The oil level should be midway between the
indicators on the oil-level window when the pump is running. Oil in good condition is clean, clear or
light in color and transparent.
• Change the oil if it has darkened.
• Add oil if it is below the midway level when the pump is running.

Changing or Adding Oil

Always drain the vacuum pump while the pump is warm and disconnected from the
power source.
Use oil supplied by Micromeritics or refer to the vacuum pump manual for other acceptable oils.
1. Unplug the vacuum pump from the power source.
9-8
Oil-level window
239-42828-01 - Dec 2012
Gemini VII