Micromeritics Gemini VII 2390a, Operator'S Manual

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Gemini VII Preventive Maintenance
239-42828-01 - Dec 2012 9-15
b.) Swing the c-clamp fastening screw around until it fits into the slot on the other half of the
clamp. Tighten the wing nut securely by hand.
18. Plug the pump power cord into the power source.
19. Allow the pump to run a few hours (overnight if possible) to eliminate air and moisture from the
fresh oil and to produce efficient vacuum operations.
Changing the Vacuum Pump Exhaust Filter
The gases used by the analyzer are exhausted by the vacuum pump. An exhaust filter is installed on the
exhaust port of oil-filled pumps. The filter minimizes the release of oil vapor and should be replaced
when it becomes so saturated with oil that it is ineffective.
1. Turn the power to the unit off by either removing the plug from the power source or by turning the
power switch to the OFF position.
2. Loosen the wing nut of the clamp at the vacuum pump exhaust port. Swing the clamp away from
the exhaust port and remove it.
3. Remove and discard the exhaust filter. Do not remove the centering ring.
4. Make sure the centering ring is in place on the exhaust port.
5. Place the new filter on the centering ring.
Exhaust filters are used to minimize the release of oil vapors. The gases are diluted
substantially upon release from the vacuum pump; however, it may be necessary in
some locations to provide a fume hood for protection from hazardous gases and
vapors released into the work area.