Waters Xevo TQD, Обзор и руководство по обслуживанию

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Gas ballasting the roughing pump
March 14, 2014, 715004387 Rev. B 103
Gas ballast the roughing pump when these conditions apply:
• With ESI operation, once a week
• When the roughing pump oil appears cloudy
• When the vacuum pressure is higher than normal
• When condensate forms in the roughing pump exhaust line
• When you change the roughing pump oil
The roughing pump can be fitted with either of the following:
• A screwdriver-operated gas ballast valve. See page 103 .
• A handle-operated gas ballast valve. See page 105 .
Gas ballasting a pump fitted with a screwdriver-operated gas
ballast valve
Required material
Flat-blade screwdriver
Notice:
To avoid shortening the oil life and pump life, routinely gas
ballast the roughing pump according to the guidelines below.
Warning:
To avoid burn injuries, take great care while working with the
roughing pump; it can be hot.
Notice:
To avoid damage, follow these guidelines:
• Do not vent the instrument when the roughing pump is gas
ballasting.
• Do not gas ballast the roughing pump while the instrument is in
Operate mode.
• Avoid gas ballasting the roughing pump for more than 2 hours.