WATERS CORPORATION TQ, Руководство оператора

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4 Maintenance Procedures
138 December 6, 2012, 71500126802IVD Rev. C
13. Ensure that the O-ring on the oil filler plug is clean and properly seated.
14. Use the 8-mm Allen wrench to refit the oil filler plug.
15. Start the instrument (see page 36 ).
16. Gas-ballast the roughing pump (see page 68 ).
Tips:
After you add oil to the pump, the following situations can occur:
• The oil level drops slightly during the first month of operation.
• The oil changes color (darkens) over time.
• After running the pump for 12 to 48 hours, it is common to see a few
drops of oil near the filler plug. Excess oil around the lip of the filler
plug will run down and drip off the pump once the pump reaches
operating temperature.
• When the pump begins to run at normal operating temperature,
spilled oil smells slightly.
Replacing the roughing pump’s oil demister element
Replace the roughing pump’s oil demister element annually.
Note:
This procedure is not required for an Alcatel oil-free roughing pump.
Required materials:
• Chemical-resistant, powder-free gloves
• 6-mm Allen wrench
• 10-mm wrench
To remove the roughing pump oil demister element
1. Vent and shut-down the instrument (see the mass spectrometer’s online
Help for details).
Caution:
Observe these precautions to avoid oil leakage when
fitting the oil filler plug to the roughing pump:
• Ensure that the plug is not cross-threaded.
• Ensure that the O-ring is not pinched.
• Do not over tighten the plug.