5-92 Maintenance Procedures
• If you are fitting an ESI probe, see “Installing the ESI probe” on
page 3-2.
• If you are fitting an IonSABRE APCI probe, see “Installing the
IonSABRE APCI probe” on page 4-3.
Replacing the roughing pump oil
Change the roughing pump oil annually.
Note: This procedure is not required for an Alcatel oil-free roughing pump.
Required materials:
• Chemical-resistant, powder-free gloves
• 8-mm Allen wrench
• Flat-blade screwdriver
• Container to catch used oil
• Funnel
• 1-L container of Anderol vacuum oil, type GS 495
To replace the roughing pump oil
1. Gas ballast the roughing pump for 1 hour to reduce the oil viscosity (see
“Gas ballasting the roughing pump” on page 5-14).
Rationale: Gas ballasting helps to circulate and mix the oil through the
pump before draining.
2. Vent and shut-down the instrument (see the mass spectrometer’s online
Help for details).
3. Allow the roughing pump to cool.
4. Place the container for used oil under the pump’s drain plug.
Warning: The roughing pump oil can be contaminated with
analyte accumulated during normal operation. Always
wear chemical-resistant, powder-free gloves when adding
or replacing oil.
Warning: To avoid burn injuries, take great care while working
with the roughing pump: it can be hot.
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