1.8 Sample inlet
Any of three methods delivers solvent and sample to the installed probe:
• An LC system, which delivers the eluent from an LC analysis.
• The fluidics system, which uses onboard solutions to automate instrument optimization to
deliver onboard solutions by direct or combined infusion.
• An FIA system, which delivers carrier solvent from flow injection analysis.
1.9 Leak sensors
Leak sensors in the instrument’s drip trays continuously monitor for liquid leaks. A leak sensor
stops system flow when its optical sensor detects about 1.5 mL of accumulated leaked liquid in
its surrounding reservoir. At the same time, the software displays an error message alerting you
that a leak has developed. Consult the
Waters ACQUITY UPLC Leak Sensor Maintenance
Instructions
(71500082506) for complete details.
1.10 Vacuum system
An external roughing pump and an internal split-flow turbomolecular pump combine to create the
source vacuum. The turbomolecular pump evacuates the analyzer and ion transfer region.
Vacuum leaks and electrical or vacuum pump failures cause vacuum loss, which triggers the
protective interlocks to switch off the high voltage. The system monitors the turbomolecular pump
speeds and continuously measures vacuum pressure with a built-in Pirani gauge. The gauge also
serves as a switch, stopping operation when vacuum loss is sensed.
A vacuum isolation valve isolates the source sample cone from the mass analyzer allowing
routine maintenance without venting.
1.11 Rear panel
The following figure shows the rear panel locations of the connectors used to operate the
instrument with external devices.
January 10, 2022, 715006200 Ver. 01 (previously released as Rev. A)
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