Sample Inlet; Leak Sensors; Vacuum System - Waters Xevo TQD Overview And Maintenance Manual

Sample inlet

Either of two methods delivers solvent and sample to the installed probe:
• An LC system, which delivers the eluent from an LC analysis.
• IntelliStart Fluidics system, which uses onboard solutions to automate
instrument optimization. You can deliver solutions by direct or
combined infusion.

Leak sensors

Leak sensors in the Xevo TQD and the drip trays of the ACQUITY UPLC
system continuously monitor system components for 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
ACQUITY UPLC Console or UNIFI software displays an error message
alerting you that a leak has developed.
See Waters ACQUITY UPLC Leak Sensor Maintenance Instructions for
complete details.

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, the
damage from which is prevented by protective interlocks. The system
monitors turbomolecular pump speed and continuously measures vacuum
pressure with a built-in Pirani gauge. The gauge also serves as a switch,
stopping operation when it senses vacuum loss.
A vacuum isolation valve isolates the source from the analyzer region,
allowing routine source maintenance without venting.
March 14, 2014, 715004387 Rev. B

Sample inlet

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